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    <link:label id="lab_us-gaap_MeasurementInputCreditSpreadMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputCreditSpreadMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Credit Spread [Member]</link:label>
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    <link:label id="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember_18dd9da9-3b4f-4068-af11-1e8ace327f33_terseLabel_en-US" xlink:label="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Project Potter Buyer, LLC and Project Potter Parent, L.P.</link:label>
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    <link:label id="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember_documentation_en-US" xlink:label="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Project Potter Buyer, LLC and Project Potter Parent, L.P.</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, before Tax [Abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputDiscountRateMember" xlink:to="lab_us-gaap_MeasurementInputDiscountRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MaiCapitalManagementIntermediateLLCMember_7ea76547-6340-4e7e-bc7d-1da82e5a088a_terseLabel_en-US" xlink:label="lab_arcc_MaiCapitalManagementIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mai Capital Management Intermediate LLC</link:label>
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    <link:label id="lab_arcc_MaiCapitalManagementIntermediateLLCMember_documentation_en-US" xlink:label="lab_arcc_MaiCapitalManagementIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mai Capital Management Intermediate LLC</link:label>
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    <link:label id="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember_250397c9-e9f4-4adb-ae15-6bd622437d23_terseLabel_en-US" xlink:label="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cube Industrials Buyer, Inc. and Cube A&amp;D Buyer Inc.</link:label>
    <link:label id="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember_label_en-US" xlink:label="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cube Industrials Buyer, Inc. and Cube A&amp;D Buyer Inc. [Member]</link:label>
    <link:label id="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember_documentation_en-US" xlink:label="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cube Industrials Buyer, Inc. and Cube A&amp;D Buyer Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember" xlink:href="arcc-20241231.xsd#arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember" xlink:to="lab_arcc_CubeIndustrialsBuyerIncAndCubeADBuyerIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyTotalReturn_1f33f269-791d-4381-9afd-c0dc31b6aa23_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTotalReturn" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total return based on net asset value</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyTotalReturn_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTotalReturn" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Total Return</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyTotalReturn" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyTotalReturn"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyTotalReturn" xlink:to="lab_us-gaap_InvestmentCompanyTotalReturn" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember_e073a2bb-e2b6-43be-82e0-6d2511551c49_terseLabel_en-US" xlink:label="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP</link:label>
    <link:label id="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember_label_en-US" xlink:label="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP [Member]</link:label>
    <link:label id="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:href="arcc-20241231.xsd#arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:to="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_84a7d109-25f8-4651-a5c3-cf04fd6d0c80_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember_89cff04b-2545-421f-aca7-0aa6554b7df3_terseLabel_en-US" xlink:label="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GTCR F Buyer Corp. and GTCR (D) Investors LP</link:label>
    <link:label id="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember_label_en-US" xlink:label="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GTCR F Buyer Corp. and GTCR (D) Investors LP [Member]</link:label>
    <link:label id="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember_documentation_en-US" xlink:label="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GTCR F Buyer Corp. and GTCR (D) Investors LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:href="arcc-20241231.xsd#arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:to="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_9deb513b-914d-47bf-a657-8cb9abc1c2d0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_6eeca142-056b-4f72-91dc-8d3991ea148a_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross Amount of Recognized Assets</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Subject to Master Netting Arrangement, before Offset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember_ea1cf21f-890d-4cfa-b282-bb92d1cd2ca1_terseLabel_en-US" xlink:label="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Smarsh Inc. and Skywalker TopCo, LLC</link:label>
    <link:label id="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember_label_en-US" xlink:label="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Smarsh Inc. and Skywalker TopCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember_documentation_en-US" xlink:label="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Smarsh Inc. and Skywalker TopCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:href="arcc-20241231.xsd#arcc_SmarshIncAndSkywalkerTopCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:to="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonNeosMember_terseLabel_en-US" xlink:label="lab_ecd_NonNeosMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-NEOs</link:label>
    <link:label id="lab_ecd_NonNeosMember_label_en-US" xlink:label="lab_ecd_NonNeosMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-NEOs [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonNeosMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_NonNeosMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonNeosMember" xlink:to="lab_ecd_NonNeosMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_9014b90b-ddfc-4254-82ae-7e1878db3397_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash dividends declared (in usd per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Declared</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LeanTaaSHoldingsInc.Member_3b28728e-221f-4f02-bca2-07a1f9dad474_terseLabel_en-US" xlink:label="lab_arcc_LeanTaaSHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LeanTaaS Holdings, Inc.</link:label>
    <link:label id="lab_arcc_LeanTaaSHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_LeanTaaSHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LeanTaaS Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_LeanTaaSHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_LeanTaaSHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LeanTaaS Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LeanTaaSHoldingsInc.Member" xlink:href="arcc-20241231.xsd#arcc_LeanTaaSHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LeanTaaSHoldingsInc.Member" xlink:to="lab_arcc_LeanTaaSHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SubordinatedCertificatesOfTheSDLPMember_94ee4ef0-906d-44a9-8df0-54cf8685b920_terseLabel_en-US" xlink:label="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated certificates of the SDLP</link:label>
    <link:label id="lab_arcc_SubordinatedCertificatesOfTheSDLPMember_label_en-US" xlink:label="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Certificates of the SDLP [Member]</link:label>
    <link:label id="lab_arcc_SubordinatedCertificatesOfTheSDLPMember_documentation_en-US" xlink:label="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subordinated Certificates of the SDLP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:href="arcc-20241231.xsd#arcc_SubordinatedCertificatesOfTheSDLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:to="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember_02e488a0-d60e-446c-977b-df6a7819fe16_terseLabel_en-US" xlink:label="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C.</link:label>
    <link:label id="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember_label_en-US" xlink:label="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C. [Member]</link:label>
    <link:label id="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember_documentation_en-US" xlink:label="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:href="arcc-20241231.xsd#arcc_TamarackIntermediateLLCAndTamarackParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:to="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ReefLifestyleLLCMember_7945180e-b183-484e-807f-3c8d8d7efa8b_terseLabel_en-US" xlink:label="lab_arcc_ReefLifestyleLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reef Lifestyle, LLC</link:label>
    <link:label id="lab_arcc_ReefLifestyleLLCMember_label_en-US" xlink:label="lab_arcc_ReefLifestyleLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reef Lifestyle, LLC [Member]</link:label>
    <link:label id="lab_arcc_ReefLifestyleLLCMember_documentation_en-US" xlink:label="lab_arcc_ReefLifestyleLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reef Lifestyle, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ReefLifestyleLLCMember" xlink:href="arcc-20241231.xsd#arcc_ReefLifestyleLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ReefLifestyleLLCMember" xlink:to="lab_arcc_ReefLifestyleLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember_350c40aa-272c-4fdb-85e5-fac4b99bca47_terseLabel_en-US" xlink:label="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vertex Service Partners, LLC and Vertex Service Partners Holdings, LLC</link:label>
    <link:label id="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vertex Service Partners, LLC and Vertex Service Partners Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vertex Service Partners, LLC and Vertex Service Partners Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:to="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_c6cbfa0d-7ce4-4404-bb7c-9d520dfc32d5_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityTable" xlink:to="lab_us-gaap_LineOfCreditFacilityTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_fbcb5984-6a5e-44d4-b1c7-730258aa5b02_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_1835484c-b8be-4a28-afe2-4015e905e4dd_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount"/>
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    <link:label id="lab_arcc_RegentEducationIncMember_dc771d35-d462-4b7c-ab64-9d6607f8688d_terseLabel_en-US" xlink:label="lab_arcc_RegentEducationIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regent Education, Inc.</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_NonRule10b51ArrAdoptedFlag"/>
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    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_d2ec99b7-635e-41af-ae59-d49b07b72301_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FAIR VALUE OF FINANCIAL INSTRUMENTS</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosuresTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresTextBlock" xlink:to="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember_8f2718b7-0806-4fb3-9762-67443ec4fc73_terseLabel_en-US" xlink:label="lab_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cloud Software Group, Inc., Picard Parent, Inc., Cloud Software Group Holdings, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P.</link:label>
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    <link:label id="lab_ecd_AwardTmgDiscLineItems_label_en-US" xlink:label="lab_ecd_AwardTmgDiscLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Disclosures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgDiscLineItems" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardTmgDiscLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="lab_ecd_AwardTmgDiscLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember_b43c39e4-72de-4548-ba25-1622f068ec45_terseLabel_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and ASE Royal Aggregator, LLC</link:label>
    <link:label id="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember_label_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and ASE Royal Aggregator, LLC [Member]</link:label>
    <link:label id="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember_documentation_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and ASE Royal Aggregator, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:href="arcc-20241231.xsd#arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember"/>
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    <link:label id="lab_arcc_O2022M4DividendsMember_009fae54-b70e-4849-8408-582f3e937857_terseLabel_en-US" xlink:label="lab_arcc_O2022M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">April 26, 2022</link:label>
    <link:label id="lab_arcc_O2022M4DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M4 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M4DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, April Twenty Sixth Two Thousand Twenty O 2022 M4 Dividends</link:label>
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    <link:label id="lab_arcc_January2026NotesMember_687fa475-1786-4b00-8227-255dc3815943_verboseLabel_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">January 2026 Notes</link:label>
    <link:label id="lab_arcc_January2026NotesMember_764f05de-ee17-4999-9784-bf54050e7d66_terseLabel_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2026 Notes (principal amount outstanding of $1,150)</link:label>
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    <link:label id="lab_arcc_January2026NotesMember_documentation_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2026 Notes</link:label>
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    <link:label id="lab_us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_11eec6b4-f167-453d-a00d-4a80ebf10d35_totalLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses)</link:label>
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    <link:label id="lab_arcc_MediaAndEntertainmentMember_37558d09-17ed-45c7-bb7c-85a2d47edb48_terseLabel_en-US" xlink:label="lab_arcc_MediaAndEntertainmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Media and Entertainment</link:label>
    <link:label id="lab_arcc_MediaAndEntertainmentMember_label_en-US" xlink:label="lab_arcc_MediaAndEntertainmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Media And Entertainment [Member]</link:label>
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    <link:label id="lab_arcc_SunrunLunaHoldco2021LLCMember_28e95416-96f6-48b5-a66e-18ce334c1fb5_terseLabel_en-US" xlink:label="lab_arcc_SunrunLunaHoldco2021LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunrun Luna Holdco 2021, LLC</link:label>
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    <link:label id="lab_arcc_SunrunLunaHoldco2021LLCMember_documentation_en-US" xlink:label="lab_arcc_SunrunLunaHoldco2021LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunrun Luna Holdco 2021, LLC</link:label>
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    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_6c4c09e2-a160-4b2f-bbd0-f08c96101f5d_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
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    <link:label id="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember_78ab6078-5266-46c3-b653-da153b336d23_terseLabel_en-US" xlink:label="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PS Operating Company LLC and PS OP Holdings LLC (fka QC Supply, LLC)</link:label>
    <link:label id="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PS Operating Company LLC and PS OP Holdings LLC [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:to="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_ea418d06-365c-4929-854d-ef294788d0a3_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FINANCING ACTIVITIES:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_392c215c-425d-4e67-9432-b2cff7027ed9_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting</link:label>
    <link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SaleOfStockPricePerShare_c00d5d0f-a626-446f-a23c-6d4669e734ed_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average Offering Price Per Share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_SaleOfStockPricePerShare_label_en-US" xlink:label="lab_us-gaap_SaleOfStockPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleOfStockPricePerShare" xlink:to="lab_us-gaap_SaleOfStockPricePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SecuritiesBorrowedAndLoanedPolicy_7a7c96f6-2818-4d65-8e30-18b597a227a4_terseLabel_en-US" xlink:label="lab_us-gaap_SecuritiesBorrowedAndLoanedPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured Borrowings</link:label>
    <link:label id="lab_us-gaap_SecuritiesBorrowedAndLoanedPolicy_label_en-US" xlink:label="lab_us-gaap_SecuritiesBorrowedAndLoanedPolicy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Borrowed and Loaned Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuritiesBorrowedAndLoanedPolicy" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SecuritiesBorrowedAndLoanedPolicy"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritiesBorrowedAndLoanedPolicy" xlink:to="lab_us-gaap_SecuritiesBorrowedAndLoanedPolicy" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember_4a28fbc0-e6c1-472c-859a-d33d71c13947_terseLabel_en-US" xlink:label="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schill Landscaping and Lawn Care Services LLC and Landscape Parallel Partners, L.P.</link:label>
    <link:label id="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember_label_en-US" xlink:label="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schill Landscaping and Lawn Care Services LLC, Tender Lawn Care ULC and Landscape Parallel Partners, L.P. [Member]</link:label>
    <link:label id="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember_documentation_en-US" xlink:label="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schill Landscaping and Lawn Care Services LLC and Landscape Parallel Partners, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember" xlink:href="arcc-20241231.xsd#arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember" xlink:to="lab_arcc_SchillLandscapingAndLawnCareServicesLLCTenderLawnCareULCAndLandscapeParallelPartnersLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember_c6b4ad22-3fda-4e1e-948c-7bee2d0fe509_terseLabel_en-US" xlink:label="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC</link:label>
    <link:label id="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:to="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_March2025NotesMember_248590f3-386e-4a47-8455-95091a74117f_verboseLabel_en-US" xlink:label="lab_arcc_March2025NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">March 2025 Notes</link:label>
    <link:label id="lab_arcc_March2025NotesMember_e5ce7109-fa03-431e-b390-99cb39e815a4_terseLabel_en-US" xlink:label="lab_arcc_March2025NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">March 2025 Notes (principal amount outstanding of $600)</link:label>
    <link:label id="lab_arcc_March2025NotesMember_label_en-US" xlink:label="lab_arcc_March2025NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">March 2025 Notes [Member]</link:label>
    <link:label id="lab_arcc_March2025NotesMember_documentation_en-US" xlink:label="lab_arcc_March2025NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">March 2025 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_March2025NotesMember" xlink:href="arcc-20241231.xsd#arcc_March2025NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_March2025NotesMember" xlink:to="lab_arcc_March2025NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentInterestRatePaidInKind_492b0ceb-fc91-4c0d-89b8-81faa0461b45_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentInterestRatePaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coupon, PIK</link:label>
    <link:label id="lab_us-gaap_InvestmentInterestRatePaidInKind_label_en-US" xlink:label="lab_us-gaap_InvestmentInterestRatePaidInKind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Interest Rate, Paid in Kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentInterestRatePaidInKind" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentInterestRatePaidInKind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentInterestRatePaidInKind" xlink:to="lab_us-gaap_InvestmentInterestRatePaidInKind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember_cfa6d32d-a830-4c73-8c92-b8c67316a4ea_terseLabel_en-US" xlink:label="lab_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Optimizely North America Inc. and Optimizely Sweden Holdings AB</link:label>
    <link:label id="lab_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember_label_en-US" xlink:label="lab_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Optimizely North America Inc. and Optimizely Sweden Holdings AB [Member]</link:label>
    <link:label id="lab_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember_documentation_en-US" xlink:label="lab_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Optimizely North America Inc. and Optimizely Sweden Holdings AB</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember" xlink:href="arcc-20241231.xsd#arcc_OptimizelyNorthAmericaInc.AndOptimizelySwedenHoldingsABMember"/>
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    <link:label id="lab_us-gaap_OperatingSegmentsMember_2d04cf6c-f6ee-4408-bbdf-93a5a159bf66_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Segments</link:label>
    <link:label id="lab_us-gaap_OperatingSegmentsMember_label_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Segments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingSegmentsMember" xlink:to="lab_us-gaap_OperatingSegmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2024M7DividendsMember_1d4b0e0a-1a6c-48e0-9f26-73b44c34df0d_terseLabel_en-US" xlink:label="lab_arcc_O2024M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 30, 2024</link:label>
    <link:label id="lab_arcc_O2024M7DividendsMember_label_en-US" xlink:label="lab_arcc_O2024M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2024 M7 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2024M7DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2024M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, July Thirtieth Two Thousand Twenty Four O 2024 M7 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2024M7DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2024M7DividendsMember"/>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_d31042f4-d6a3-4c08-8047-1ed7719adb6e_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash (used in) provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
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    <link:label id="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember_6d923976-9001-4caa-9e52-686b8d95c026_terseLabel_en-US" xlink:label="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global Medical Response, Inc. and GMR Buyer Corp.</link:label>
    <link:label id="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember_label_en-US" xlink:label="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Global Medical Response, Inc. and GMR Buyer Corp. [Member]</link:label>
    <link:label id="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember_documentation_en-US" xlink:label="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Global Medical Response, Inc. and GMR Buyer Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:href="arcc-20241231.xsd#arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember"/>
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    <link:label id="lab_arcc_SecuredBorrowings_249cd5da-75d6-436f-8927-0763b6486647_terseLabel_en-US" xlink:label="lab_arcc_SecuredBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured borrowings</link:label>
    <link:label id="lab_arcc_SecuredBorrowings_label_en-US" xlink:label="lab_arcc_SecuredBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Borrowings</link:label>
    <link:label id="lab_arcc_SecuredBorrowings_documentation_en-US" xlink:label="lab_arcc_SecuredBorrowings" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Secured Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SecuredBorrowings" xlink:href="arcc-20241231.xsd#arcc_SecuredBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SecuredBorrowings" xlink:to="lab_arcc_SecuredBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SecuredDebtMember_3c4c65a0-26a9-4445-af41-fe3d98335835_verboseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Secured Debt</link:label>
    <link:label id="lab_us-gaap_SecuredDebtMember_b303afbe-0162-43e6-9357-d1d442ae49f2_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term loan tranche</link:label>
    <link:label id="lab_us-gaap_SecuredDebtMember_label_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SecuredDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredDebtMember" xlink:to="lab_us-gaap_SecuredDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedAvailableCapital_9b02493b-130a-468b-8649-173498253bc7_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedAvailableCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital available to the SDLP</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAvailableCapital_label_en-US" xlink:label="lab_arcc_InvestmentOwnedAvailableCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Available Capital</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAvailableCapital_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedAvailableCapital" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Available Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedAvailableCapital" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedAvailableCapital"/>
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    <link:label id="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember_e723d455-d252-41c8-89df-440075b1e70c_terseLabel_en-US" xlink:label="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Teasdale Foods, Inc. and Familia Group Holdings Inc.</link:label>
    <link:label id="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember_label_en-US" xlink:label="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Teasdale Foods, Inc. and Familia Group Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Teasdale Foods, Inc. and Familia Group Holdings Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember" xlink:to="lab_arcc_TeasdaleFoodsIncAndFamiliaGroupHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_cc930dcf-ff39-4e4c-bf49-6dab47797314_totalLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gain (loss) for federal tax purposes</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_918788b5-5524-400f-a8b6-9691bf2da5e3_negatedLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Unrealized depreciation</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Unrealized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:to="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember_971116e7-23df-480e-b1d3-594fbcc44e20_terseLabel_en-US" xlink:label="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LBC Woodlands Purchaser LLC and LBC Woodlands Holdings LP</link:label>
    <link:label id="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember_label_en-US" xlink:label="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LBC Woodlands Purchaser LLC and LBC Woodlands Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LBC Woodlands Purchaser LLC and LBC Woodlands Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:to="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMethodTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing Method</link:label>
    <link:label id="lab_ecd_AwardTmgMethodTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Method [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardTmgMethodTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMethodTextBlock" xlink:to="lab_ecd_AwardTmgMethodTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentSoldPrincipalAmount_fb51e5d3-0f9d-4f95-b08d-14aa7ec44b76_terseLabel_en-US" xlink:label="lab_arcc_InvestmentSoldPrincipalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Participating interest sold</link:label>
    <link:label id="lab_arcc_InvestmentSoldPrincipalAmount_label_en-US" xlink:label="lab_arcc_InvestmentSoldPrincipalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Sold, Principal Amount</link:label>
    <link:label id="lab_arcc_InvestmentSoldPrincipalAmount_documentation_en-US" xlink:label="lab_arcc_InvestmentSoldPrincipalAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Sold, Principal Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentSoldPrincipalAmount" xlink:href="arcc-20241231.xsd#arcc_InvestmentSoldPrincipalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentSoldPrincipalAmount" xlink:to="lab_arcc_InvestmentSoldPrincipalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TradingArrByIndTable_terseLabel_en-US" xlink:label="lab_ecd_TradingArrByIndTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Arrangements, by Individual</link:label>
    <link:label id="lab_ecd_TradingArrByIndTable_label_en-US" xlink:label="lab_ecd_TradingArrByIndTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangements, by Individual [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TradingArrByIndTable" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TradingArrByIndTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TradingArrByIndTable" xlink:to="lab_ecd_TradingArrByIndTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdministrativeFeesExpense_8b7038b7-71f9-483b-a97c-b97ea0768b61_terseLabel_en-US" xlink:label="lab_us-gaap_AdministrativeFeesExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Administrative and other fees</link:label>
    <link:label id="lab_us-gaap_AdministrativeFeesExpense_label_en-US" xlink:label="lab_us-gaap_AdministrativeFeesExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Administrative Fees Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdministrativeFeesExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdministrativeFeesExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdministrativeFeesExpense" xlink:to="lab_us-gaap_AdministrativeFeesExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_01adbc26-5739-4bb2-a37e-afed0adc2723_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding" xlink:to="lab_dei_EntityCommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfBorrowingMoneyMember_label_en-US" xlink:label="lab_arcc_RiskOfBorrowingMoneyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Borrowing Money [Member]</link:label>
    <link:label id="lab_arcc_RiskOfBorrowingMoneyMember_documentation_en-US" xlink:label="lab_arcc_RiskOfBorrowingMoneyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Borrowing Money</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfBorrowingMoneyMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfBorrowingMoneyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfBorrowingMoneyMember" xlink:to="lab_arcc_RiskOfBorrowingMoneyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTradingPoliciesProcLineItems_label_en-US" xlink:label="lab_ecd_InsiderTradingPoliciesProcLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_InsiderTradingPoliciesProcLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:to="lab_ecd_InsiderTradingPoliciesProcLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OverAllotmentOptionOneMember_17d2f741-02c7-441e-81e0-f87910438de9_terseLabel_en-US" xlink:label="lab_arcc_OverAllotmentOptionOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Over-allotment option one</link:label>
    <link:label id="lab_arcc_OverAllotmentOptionOneMember_label_en-US" xlink:label="lab_arcc_OverAllotmentOptionOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Over-Allotment Option One [Member]</link:label>
    <link:label id="lab_arcc_OverAllotmentOptionOneMember_documentation_en-US" xlink:label="lab_arcc_OverAllotmentOptionOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Over-Allotment Option One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OverAllotmentOptionOneMember" xlink:href="arcc-20241231.xsd#arcc_OverAllotmentOptionOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OverAllotmentOptionOneMember" xlink:to="lab_arcc_OverAllotmentOptionOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_UseOfEstimates_0008e0de-7362-4dad-a205-bd413e53666f_terseLabel_en-US" xlink:label="lab_us-gaap_UseOfEstimates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Use of Estimates in the Preparation of Consolidated Financial Statements</link:label>
    <link:label id="lab_us-gaap_UseOfEstimates_label_en-US" xlink:label="lab_us-gaap_UseOfEstimates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Use of Estimates, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UseOfEstimates" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UseOfEstimates"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UseOfEstimates" xlink:to="lab_us-gaap_UseOfEstimates" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FeverLabsInc.Member_3272545a-bd40-4b47-94df-e346b1514dcf_terseLabel_en-US" xlink:label="lab_arcc_FeverLabsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fever Labs, Inc.</link:label>
    <link:label id="lab_arcc_FeverLabsInc.Member_label_en-US" xlink:label="lab_arcc_FeverLabsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fever Labs, Inc. [Member]</link:label>
    <link:label id="lab_arcc_FeverLabsInc.Member_documentation_en-US" xlink:label="lab_arcc_FeverLabsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fever Labs, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FeverLabsInc.Member" xlink:href="arcc-20241231.xsd#arcc_FeverLabsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FeverLabsInc.Member" xlink:to="lab_arcc_FeverLabsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToCompAmt_terseLabel_en-US" xlink:label="lab_ecd_AdjToCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation, Amount</link:label>
    <link:label id="lab_ecd_AdjToCompAmt_label_en-US" xlink:label="lab_ecd_AdjToCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AdjToCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToCompAmt" xlink:to="lab_ecd_AdjToCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember_05825685-40bf-4a99-a3a4-5eec088257e0_terseLabel_en-US" xlink:label="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Project Alpha Intermediate Holding, Inc. and Qlik Parent, Inc.</link:label>
    <link:label id="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember_label_en-US" xlink:label="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Project Alpha Intermediate Holding, Inc. and Qlik Parent, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember_documentation_en-US" xlink:label="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Project Alpha Intermediate Holding, Inc. and Qlik Parent, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember" xlink:href="arcc-20241231.xsd#arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember" xlink:to="lab_arcc_ProjectAlphaIntermediateHoldingIncAndQlikParentIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_d1a009b3-72ac-4007-86bf-c2b06d13fd46_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital in excess of par value</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingRecoveryCompAmt_terseLabel_en-US" xlink:label="lab_ecd_OutstandingRecoveryCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Amount</link:label>
    <link:label id="lab_ecd_OutstandingRecoveryCompAmt_label_en-US" xlink:label="lab_ecd_OutstandingRecoveryCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Recovery Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_OutstandingRecoveryCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingRecoveryCompAmt" xlink:to="lab_ecd_OutstandingRecoveryCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_November2024DebtSecuritizationMember_4f6017d6-90cd-45cf-9d8c-800d8390b3d2_terseLabel_en-US" xlink:label="lab_arcc_November2024DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">November 2024 Debt Securitization</link:label>
    <link:label id="lab_arcc_November2024DebtSecuritizationMember_label_en-US" xlink:label="lab_arcc_November2024DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">November 2024 Debt Securitization [Member]</link:label>
    <link:label id="lab_arcc_November2024DebtSecuritizationMember_documentation_en-US" xlink:label="lab_arcc_November2024DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">November 2024 Debt Securitization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_November2024DebtSecuritizationMember" xlink:href="arcc-20241231.xsd#arcc_November2024DebtSecuritizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_November2024DebtSecuritizationMember" xlink:to="lab_arcc_November2024DebtSecuritizationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember_terseLabel_en-US" xlink:label="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table</link:label>
    <link:label id="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember_label_en-US" xlink:label="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember"/>
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    <link:label id="lab_arcc_July2025NotesMember_documentation_en-US" xlink:label="lab_arcc_July2025NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2025 Notes</link:label>
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    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateRealizedCapitalGainsMember_3206259f-c157-47b4-9ac9-1814912d3dec_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateRealizedCapitalGainsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Realized Capital Gains</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateRealizedCapitalGainsMember" xlink:href="arcc-20241231.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateRealizedCapitalGainsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateRealizedCapitalGainsMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateRealizedCapitalGainsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntitySmallBusiness_1a11208b-430b-4b60-9c3e-eb3955a5944f_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntitySmallBusiness"/>
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    <link:label id="lab_ecd_CoSelectedMeasureAmt_terseLabel_en-US" xlink:label="lab_ecd_CoSelectedMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Selected Measure Amount</link:label>
    <link:label id="lab_ecd_CoSelectedMeasureAmt_label_en-US" xlink:label="lab_ecd_CoSelectedMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Company Selected Measure Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_CoSelectedMeasureAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CoSelectedMeasureAmt" xlink:to="lab_ecd_CoSelectedMeasureAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AleraGroupInc.Member_8ec39c64-9a48-4a17-8205-92a0686faa6b_terseLabel_en-US" xlink:label="lab_arcc_AleraGroupInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alera Group, Inc.</link:label>
    <link:label id="lab_arcc_AleraGroupInc.Member_label_en-US" xlink:label="lab_arcc_AleraGroupInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alera Group, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AleraGroupInc.Member_documentation_en-US" xlink:label="lab_arcc_AleraGroupInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alera Group, Inc.</link:label>
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    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP2Member_de328abf-7ade-46d5-a1fc-c9c8fdb4c7a5_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, GBP 2</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP2Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, GBP 2 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP2Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, GBP 2</link:label>
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    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_bd686d8b-fd4e-46b4-8643-53a8e9a222b5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Debt issuance costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RetailingAndDistributionMember_2529a9ba-0c29-4baa-979a-7007af46eeb1_terseLabel_en-US" xlink:label="lab_arcc_RetailingAndDistributionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retailing and Distribution</link:label>
    <link:label id="lab_arcc_RetailingAndDistributionMember_label_en-US" xlink:label="lab_arcc_RetailingAndDistributionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retailing and Distribution [Member]</link:label>
    <link:label id="lab_arcc_RetailingAndDistributionMember_documentation_en-US" xlink:label="lab_arcc_RetailingAndDistributionMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Retailing and Distribution</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RetailingAndDistributionMember" xlink:href="arcc-20241231.xsd#arcc_RetailingAndDistributionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RetailingAndDistributionMember" xlink:to="lab_arcc_RetailingAndDistributionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TabularListTableTextBlock_terseLabel_en-US" xlink:label="lab_ecd_TabularListTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tabular List, Table</link:label>
    <link:label id="lab_ecd_TabularListTableTextBlock_label_en-US" xlink:label="lab_ecd_TabularListTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tabular List [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TabularListTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TabularListTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TabularListTableTextBlock" xlink:to="lab_ecd_TabularListTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2024M5DividendsMember_d37f218f-73ef-488f-81b5-979bb5ac174e_terseLabel_en-US" xlink:label="lab_arcc_O2024M5DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">May 1. 2024</link:label>
    <link:label id="lab_arcc_O2024M5DividendsMember_label_en-US" xlink:label="lab_arcc_O2024M5DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2024 M5 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2024M5DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2024M5DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, May First Two Thousand Twenty Four O 2024 M5 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2024M5DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2024M5DividendsMember"/>
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    <link:label id="lab_arcc_DiamondMezzanine24LLCMember_6e52b97b-96ee-48b9-b3b0-aebd7948029a_terseLabel_en-US" xlink:label="lab_arcc_DiamondMezzanine24LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diamond Mezzanine 24 LLC</link:label>
    <link:label id="lab_arcc_DiamondMezzanine24LLCMember_label_en-US" xlink:label="lab_arcc_DiamondMezzanine24LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Diamond Mezzanine 24 LLC [Member]</link:label>
    <link:label id="lab_arcc_DiamondMezzanine24LLCMember_documentation_en-US" xlink:label="lab_arcc_DiamondMezzanine24LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Diamond Mezzanine 24 LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DiamondMezzanine24LLCMember" xlink:href="arcc-20241231.xsd#arcc_DiamondMezzanine24LLCMember"/>
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    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_10fc7862-bc67-469e-92b6-68dc0d4d054c_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member" xlink:to="lab_us-gaap_FairValueInputsLevel3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost_0d1b8b3b-c25c-4f4f-b47e-7afcab46a426_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans on non-accrual status, as a percent of total investments at amortized cost</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost_label_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Cost</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedNonAccrualStatusPercentOfCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:to="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember_5d92ceab-86df-4012-8741-ec21b6cb9ac5_terseLabel_en-US" xlink:label="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Precision Concepts International LLC and Precision Concepts Canada Corporation</link:label>
    <link:label id="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember_label_en-US" xlink:label="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Precision Concepts International LLC and Precision Concepts Canada Corporation [Member]</link:label>
    <link:label id="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember_documentation_en-US" xlink:label="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Precision Concepts International LLC and Precision Concepts Canada Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:href="arcc-20241231.xsd#arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:to="lab_arcc_PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2022M24DividendsMember_64e73e08-4ba8-44f1-a89c-19dec9237ac4_terseLabel_en-US" xlink:label="lab_arcc_O2022M24DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 9, 2022</link:label>
    <link:label id="lab_arcc_O2022M24DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M24DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M2 4 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M24DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M24DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2022 M2 4Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022M24DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022M24DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2022M24DividendsMember" xlink:to="lab_arcc_O2022M24DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_2ccace7c-0922-409a-9755-0148c1d86642_verboseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses) from foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember_6d2932b1-25f4-4bba-a3b0-bb5a64c8ba9c_terseLabel_en-US" xlink:label="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kaseya Inc. and Knockout Intermediate Holdings I Inc</link:label>
    <link:label id="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember_label_en-US" xlink:label="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kaseya Inc. and Knockout Intermediate Holdings I Inc [Member]</link:label>
    <link:label id="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember_documentation_en-US" xlink:label="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kaseya Inc. and Knockout Intermediate Holdings I Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember" xlink:href="arcc-20241231.xsd#arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember" xlink:to="lab_arcc_KaseyaIncAndKnockoutIntermediateHoldingsIIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedAtCostYield_082fdf06-2d5f-4d86-89af-aca7f6af79d2_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedAtCostYield" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Yield on investment, at cost</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtCostYield_label_en-US" xlink:label="lab_arcc_InvestmentOwnedAtCostYield" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, at Cost, Yield</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtCostYield_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedAtCostYield" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, at Cost, Yield</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedAtCostYield" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedAtCostYield"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedAtCostYield" xlink:to="lab_arcc_InvestmentOwnedAtCostYield" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis_a5fff920-9660-4f17-bb4c-b53c78003b2c_terseLabel_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract, Identifier [Axis]</link:label>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis_label_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract, Identifier [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:to="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FloridaFoodProductsLLCMember_6d381c30-aa36-42d1-b20c-9b1707916b01_terseLabel_en-US" xlink:label="lab_arcc_FloridaFoodProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Florida Food Products, LLC</link:label>
    <link:label id="lab_arcc_FloridaFoodProductsLLCMember_label_en-US" xlink:label="lab_arcc_FloridaFoodProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Florida Food Products, LLC [Member]</link:label>
    <link:label id="lab_arcc_FloridaFoodProductsLLCMember_documentation_en-US" xlink:label="lab_arcc_FloridaFoodProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Florida Food Products, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FloridaFoodProductsLLCMember" xlink:href="arcc-20241231.xsd#arcc_FloridaFoodProductsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FloridaFoodProductsLLCMember" xlink:to="lab_arcc_FloridaFoodProductsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PayableToParticipants_1e054132-d649-4d23-aa70-30004713c814_terseLabel_en-US" xlink:label="lab_arcc_PayableToParticipants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payable to participants</link:label>
    <link:label id="lab_arcc_PayableToParticipants_label_en-US" xlink:label="lab_arcc_PayableToParticipants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payable To Participants</link:label>
    <link:label id="lab_arcc_PayableToParticipants_documentation_en-US" xlink:label="lab_arcc_PayableToParticipants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payable To Participants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PayableToParticipants" xlink:href="arcc-20241231.xsd#arcc_PayableToParticipants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PayableToParticipants" xlink:to="lab_arcc_PayableToParticipants" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IVRolloverHoldingsLLCMember_9fa29311-d15d-4c5b-a15a-fe8b0d6b047e_terseLabel_en-US" xlink:label="lab_arcc_IVRolloverHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IV Rollover Holdings, LLC</link:label>
    <link:label id="lab_arcc_IVRolloverHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_IVRolloverHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IV Rollover Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_IVRolloverHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_IVRolloverHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IV Rollover Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IVRolloverHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_IVRolloverHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IVRolloverHoldingsLLCMember" xlink:to="lab_arcc_IVRolloverHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember_1fbe96d4-bb8d-4141-8416-0010870a38e1_terseLabel_en-US" xlink:label="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee and capital gains incentive fee, net of the fee waiver</link:label>
    <link:label id="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember_label_en-US" xlink:label="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Based Fees And Capital Gains Incentive Fees, Net Of Fee Waiver [Member]</link:label>
    <link:label id="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember_documentation_en-US" xlink:label="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Based Fees And Capital Gains Incentive Fees, Net Of Fee Waiver</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember" xlink:href="arcc-20241231.xsd#arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember" xlink:to="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesNetOfFeeWaiverMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2022M2DividendsMember_ef87900f-b9c0-424c-b703-8954c00c0d44_terseLabel_en-US" xlink:label="lab_arcc_O2022M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 9, 2022</link:label>
    <link:label id="lab_arcc_O2022M2DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M2 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M2DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, February Ninth Two Thousand Twenty Two O 2022 M2 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022M2DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022M2DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2022M2DividendsMember" xlink:to="lab_arcc_O2022M2DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AnaplanIncMember_f4f75d56-9b5c-47a7-94f3-bf19a4a15c40_terseLabel_en-US" xlink:label="lab_arcc_AnaplanIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Anaplan, Inc</link:label>
    <link:label id="lab_arcc_AnaplanIncMember_label_en-US" xlink:label="lab_arcc_AnaplanIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Anaplan, Inc [Member]</link:label>
    <link:label id="lab_arcc_AnaplanIncMember_documentation_en-US" xlink:label="lab_arcc_AnaplanIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Anaplan, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AnaplanIncMember" xlink:href="arcc-20241231.xsd#arcc_AnaplanIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AnaplanIncMember" xlink:to="lab_arcc_AnaplanIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncreaseDecreaseInPayablesToParticipants_1f96e6fc-c349-43cd-abff-b052fb1f8b4f_terseLabel_en-US" xlink:label="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payable to participants</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInPayablesToParticipants_label_en-US" xlink:label="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Payables To Participants</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInPayablesToParticipants_documentation_en-US" xlink:label="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Payables To Participants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:href="arcc-20241231.xsd#arcc_IncreaseDecreaseInPayablesToParticipants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:to="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WellnessAcquisitionCoIncMember_3859e538-f97f-425b-af95-e312fca2b72a_terseLabel_en-US" xlink:label="lab_arcc_WellnessAcquisitionCoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wellness AcquisitionCo, Inc</link:label>
    <link:label id="lab_arcc_WellnessAcquisitionCoIncMember_label_en-US" xlink:label="lab_arcc_WellnessAcquisitionCoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wellness AcquisitionCo, Inc [Member]</link:label>
    <link:label id="lab_arcc_WellnessAcquisitionCoIncMember_documentation_en-US" xlink:label="lab_arcc_WellnessAcquisitionCoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wellness AcquisitionCo, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WellnessAcquisitionCoIncMember" xlink:href="arcc-20241231.xsd#arcc_WellnessAcquisitionCoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WellnessAcquisitionCoIncMember" xlink:to="lab_arcc_WellnessAcquisitionCoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfInvestmentAdvisorActivityMember_label_en-US" xlink:label="lab_arcc_RiskOfInvestmentAdvisorActivityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Investment Advisor Activity [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInvestmentAdvisorActivityMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInvestmentAdvisorActivityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Investment Advisor Activity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInvestmentAdvisorActivityMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInvestmentAdvisorActivityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInvestmentAdvisorActivityMember" xlink:to="lab_arcc_RiskOfInvestmentAdvisorActivityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare_d515e4ea-3a18-419b-a579-db4352c88ea2_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains (in dollars per share)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare_label_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution, Long-Term Capital Gain, Per Share</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution, Long-Term Capital Gain, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare" xlink:to="lab_arcc_InvestmentCompanyDistributionLongTermCapitalGainPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityDomain_95a68d2b-43db-46ca-bb9f-f5eb28cb7c7f_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityDomain_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain" xlink:to="lab_us-gaap_CreditFacilityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearTwo_0f05b7d0-477e-4191-9368-d75c1a52a8b2_terseLabel_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount, year two</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearTwo_label_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year Two</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearTwo_documentation_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearTwo" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LettersOfCreditOutstandingAmountYearTwo" xlink:href="arcc-20241231.xsd#arcc_LettersOfCreditOutstandingAmountYearTwo"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LettersOfCreditOutstandingAmountYearTwo" xlink:to="lab_arcc_LettersOfCreditOutstandingAmountYearTwo" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_5ae950fc-4745-4eeb-9b09-77452b445901_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentOwnedAtCost_e5c61fb5-16dc-45e8-8b74-cd1f8389841c_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtCost" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortized cost of investments</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedAtCost_2b2166b4-e89a-4096-a1d2-d714f9d4e889_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtCost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortized Cost</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedAtCost_label_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtCost" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentOwnedAtCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedAtCost" xlink:to="lab_us-gaap_InvestmentOwnedAtCost" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncomeBasedFeesPayable_7dd3ecaf-8c39-42fa-8d35-e64298c1e55c_terseLabel_en-US" xlink:label="lab_arcc_IncomeBasedFeesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee payable</link:label>
    <link:label id="lab_arcc_IncomeBasedFeesPayable_label_en-US" xlink:label="lab_arcc_IncomeBasedFeesPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Based Fees Payable</link:label>
    <link:label id="lab_arcc_IncomeBasedFeesPayable_documentation_en-US" xlink:label="lab_arcc_IncomeBasedFeesPayable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Based Fees Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncomeBasedFeesPayable" xlink:href="arcc-20241231.xsd#arcc_IncomeBasedFeesPayable"/>
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    <link:label id="lab_arcc_DebtInstrumentCovenantAssetsToDebtRatioMinimum_674cd86b-4082-4707-8ede-a854f218a6ed_terseLabel_en-US" xlink:label="lab_arcc_DebtInstrumentCovenantAssetsToDebtRatioMinimum" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum required ratio of total assets to total indebtedness</link:label>
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    <link:label id="lab_us-gaap_EmployeeStockOptionMember_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Stock Option</link:label>
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    <link:label id="lab_us-gaap_ForeignExchangeForwardMember_90f9aafe-17f8-4f75-81f1-8d0578fe9c4e_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignExchangeForwardMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract</link:label>
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    <link:label id="lab_us-gaap_OtherExpenses_8a708bca-1c05-4f90-81bc-639993fac286_terseLabel_en-US" xlink:label="lab_us-gaap_OtherExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Management fees and other expenses</link:label>
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    <link:label id="lab_arcc_RiskOfEffectsOfHealthPandemicsOrEpidemicsMember_label_en-US" xlink:label="lab_arcc_RiskOfEffectsOfHealthPandemicsOrEpidemicsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Effects Of Health Pandemics Or Epidemics [Member]</link:label>
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    <link:label id="lab_us-gaap_ConvertibleDebtMember_481b5b0f-e656-4921-9114-738666e7e7ba_terseLabel_en-US" xlink:label="lab_us-gaap_ConvertibleDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible Debt</link:label>
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    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_181edbc9-1ec0-4b5b-ad56-4d5443176f16_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_e1cd0e5a-4c26-4332-a919-5e33d54bf0f8_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign Currency Translation</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
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    <link:label id="lab_arcc_McKenzieCreativeBrandsLLCMember_7df059a6-1b15-4ea7-9719-314f1e68d2d9_terseLabel_en-US" xlink:label="lab_arcc_McKenzieCreativeBrandsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">McKenzie Creative Brands, LLC</link:label>
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    <link:label id="lab_arcc_McKenzieCreativeBrandsLLCMember_documentation_en-US" xlink:label="lab_arcc_McKenzieCreativeBrandsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">McKenzie Creative Brands, LLC</link:label>
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    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_ac2fe85f-5640-43a2-948a-85a421a451ea_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_c12bcc73-bc06-4a37-b0df-874ff6a3348c_verboseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revolving tranche</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember_d6fda5bf-1c68-4c4d-b7db-c80fb47dbcc7_terseLabel_en-US" xlink:label="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bobcat Purchaser, LLC and Bobcat Topco, L.P.</link:label>
    <link:label id="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember_label_en-US" xlink:label="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bobcat Purchaser, LLC and Bobcat Topco, L.P. [Member]</link:label>
    <link:label id="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bobcat Purchaser, LLC and Bobcat Topco, L.P.</link:label>
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    <link:label id="lab_ecd_TrdArrExpirationDate_terseLabel_en-US" xlink:label="lab_ecd_TrdArrExpirationDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expiration Date</link:label>
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    <link:label id="lab_us-gaap_InvestmentOwnedBalanceShares_51bf7bb4-26f7-488b-a404-ccda30758fb1_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedBalanceShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares/Units</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedBalanceShares" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentOwnedBalanceShares"/>
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    <link:label id="lab_arcc_AlternateBaseRateMember_967c9c43-e656-45c2-950b-32d9d260a961_terseLabel_en-US" xlink:label="lab_arcc_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alternate Base Rate</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_AlternateBaseRateMember" xlink:href="arcc-20241231.xsd#arcc_AlternateBaseRateMember"/>
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    <link:label id="lab_arcc_WalnutParentIncMember_6b5501a5-16b9-4056-9090-3c7f2a246906_terseLabel_en-US" xlink:label="lab_arcc_WalnutParentIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Walnut Parent, Inc.</link:label>
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    <link:label id="lab_ecd_TotalShareholderRtnAmt_terseLabel_en-US" xlink:label="lab_ecd_TotalShareholderRtnAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Shareholder Return Amount</link:label>
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    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationNetUnrealizedDepreciationAppreciationOnInvestmentsIncreaseDecreaseInTaxableIncome_8988c789-5e73-4609-8b8b-5d925fbda8d6_terseLabel_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationNetUnrealizedDepreciationAppreciationOnInvestmentsIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized (losses) gains on investments, foreign currency and other transactions</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis_b002b7be-6c2f-4e2f-a9a4-0adf0e09dd0f_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Nonconsolidated Subsidiary [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WatermillExpressLLCAndWatermillExpressHoldingsLLCMember_ade47967-3e9b-4f1b-a4aa-cec75d40c2a0_terseLabel_en-US" xlink:label="lab_arcc_WatermillExpressLLCAndWatermillExpressHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Watermill Express, LLC and Watermill Express Holdings, LLC</link:label>
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    <link:label id="lab_arcc_WatermillExpressLLCAndWatermillExpressHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_WatermillExpressLLCAndWatermillExpressHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Watermill Express, LLC and Watermill Express Holdings, LLC</link:label>
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    <link:label id="lab_arcc_PluralsightIncMember_13e27876-836d-4f04-b1eb-a3fe4d830eed_terseLabel_en-US" xlink:label="lab_arcc_PluralsightIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pluralsight, Inc.</link:label>
    <link:label id="lab_arcc_PluralsightIncMember_label_en-US" xlink:label="lab_arcc_PluralsightIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pluralsight, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PluralsightIncMember_documentation_en-US" xlink:label="lab_arcc_PluralsightIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pluralsight, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PluralsightIncMember" xlink:href="arcc-20241231.xsd#arcc_PluralsightIncMember"/>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:to="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember_78c65a1e-e0e2-450d-98fb-6a123fb371f3_terseLabel_en-US" xlink:label="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Eagle Football Holdings BidCo Limited</link:label>
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    <link:label id="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember_documentation_en-US" xlink:label="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eagle Football Holdings BidCo Limited and Eagle Football Holdings Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:href="arcc-20241231.xsd#arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:to="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember_2153f994-f5f7-4872-a995-f4e9b1c1eb4f_terseLabel_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and RC IV GEDC Investor LLC</link:label>
    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember_label_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and RC IV GEDC Investor LLC [Member]</link:label>
    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember_documentation_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and RC IV GEDC Investor LLC</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount_28cb2258-759d-4e31-88e7-36e08097033a_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit facility fees</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Commitment Fee Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:to="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember_cf005e29-d840-401a-bb8b-c4ab1b44bf40_terseLabel_en-US" xlink:label="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NCWS Intermediate, Inc. and NCWS Holdings LP</link:label>
    <link:label id="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember_label_en-US" xlink:label="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NCWS Intermediate, Inc. and NCWS Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NCWS Intermediate, Inc. and NCWS Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember" xlink:to="lab_arcc_NCWSIntermediateIncAndNCWSHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember_d053960d-fb18-409f-9071-ce2beae6ad21_terseLabel_en-US" xlink:label="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OTG Concessions Management, LLC and Octa Parent Holdings, LLC</link:label>
    <link:label id="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OTG Concessions Management, LLC and Octa Parent Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OTG Concessions Management, LLC and Octa Parent Holdings, LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:to="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_7d77bc0d-e472-4ffc-a5e4-54095dc76c90_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventLineItems" xlink:to="lab_us-gaap_SubsequentEventLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MembersCapital_b6f1baa4-5cf7-48e4-bb48-50ac6d0f28ae_terseLabel_en-US" xlink:label="lab_us-gaap_MembersCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributed capital</link:label>
    <link:label id="lab_us-gaap_MembersCapital_label_en-US" xlink:label="lab_us-gaap_MembersCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Members' Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersCapital" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MembersCapital"/>
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    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions_98105963-313d-455f-ac1a-39e3394d0623_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemptions (cost)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:href="arcc-20241231.xsd#arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:to="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_055734aa-4fec-41bc-9313-794b1a50ad7a_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average outstanding balance</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Average Outstanding Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:to="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member_291958bb-e737-4caf-b4b3-b877948e7301_terseLabel_en-US" xlink:label="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Avalign Holdings, Inc. and Avalign Technologies, Inc.</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:href="arcc-20241231.xsd#arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:to="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_d40091cf-b597-460b-8f7f-e6f0da870680_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems" xlink:to="lab_us-gaap_DebtInstrumentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LewsIntermediateHoldingsLLCMember_d824b887-8b54-4ef7-b634-8439e575a4a2_terseLabel_en-US" xlink:label="lab_arcc_LewsIntermediateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lew's Intermediate Holdings, LLC</link:label>
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    <link:label id="lab_us-gaap_OtherAssets_c05fb80b-6797-4324-bc99-66db9b841e0f_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets" xlink:to="lab_us-gaap_OtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNZDMember_79b61fe8-9329-49e6-80ba-87a4f0dee374_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNZDMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NZD</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractNZDMember" xlink:href="arcc-20241231.xsd#arcc_ForeignCurrencyForwardContractNZDMember"/>
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    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationRealizedGainsLossesDifferencesIncreaseDecreaseInTaxableIncome_addcb60e-6531-4ddf-abdc-0206be5d19c4_terseLabel_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationRealizedGainsLossesDifferencesIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Realized gain/loss difference</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentTaxBasisReconciliationRealizedGainsLossesDifferencesIncreaseDecreaseInTaxableIncome" xlink:href="arcc-20241231.xsd#arcc_InvestmentTaxBasisReconciliationRealizedGainsLossesDifferencesIncreaseDecreaseInTaxableIncome"/>
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    <link:label id="lab_arcc_SCIHSaltHoldingsInc.Member_6ed08b3f-27a5-4137-be28-1f7d70a1fca5_terseLabel_en-US" xlink:label="lab_arcc_SCIHSaltHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SCIH Salt Holdings Inc.</link:label>
    <link:label id="lab_arcc_SCIHSaltHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_SCIHSaltHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SCIH Salt Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_SCIHSaltHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_SCIHSaltHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SCIH Salt Holdings Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SCIHSaltHoldingsInc.Member" xlink:href="arcc-20241231.xsd#arcc_SCIHSaltHoldingsInc.Member"/>
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    <link:label id="lab_arcc_GFParentLLCMember_1feb5cb9-345d-4f4b-85f0-7650f1e47218_terseLabel_en-US" xlink:label="lab_arcc_GFParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GF Parent LLC</link:label>
    <link:label id="lab_arcc_GFParentLLCMember_label_en-US" xlink:label="lab_arcc_GFParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GF Parent LLC [Member]</link:label>
    <link:label id="lab_arcc_GFParentLLCMember_documentation_en-US" xlink:label="lab_arcc_GFParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GF Parent LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GFParentLLCMember" xlink:href="arcc-20241231.xsd#arcc_GFParentLLCMember"/>
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    <link:label id="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_f30a353e-cfd6-45d3-b29e-01b4ba80ca9a_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average stated interest rate</link:label>
    <link:label id="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_label_en-US" xlink:label="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Weighted Average Interest Rate, over Time</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
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    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_94d05366-421b-494c-98ad-9011a0e9aea3_terseLabel_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of Presentation</link:label>
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Basis of Accounting, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0fb2518e-6a1e-461a-affb-81e20a57d73f_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Diluted (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75415026-b350-43a7-a1d1-a2b9ee8b6dde_totalLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Weighted average shares of common stock outstanding - diluted (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember_5306ab78-e1ad-4177-845a-90f445f0e96d_terseLabel_en-US" xlink:label="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Elemica Parent, Inc. &amp; EZ Elemica Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember_label_en-US" xlink:label="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Elemica Parent, Inc. &amp; EZ Elemica Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Elemica Parent, Inc. &amp; EZ Elemica Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ElemicaParentIncEZElemicaHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:to="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HPRSSBuyerInc.Member_6d7e43f1-26c2-400c-b0c2-e9cfcb3c2d98_terseLabel_en-US" xlink:label="lab_arcc_HPRSSBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HP RSS Buyer, Inc.</link:label>
    <link:label id="lab_arcc_HPRSSBuyerInc.Member_label_en-US" xlink:label="lab_arcc_HPRSSBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HP RSS Buyer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HPRSSBuyerInc.Member_documentation_en-US" xlink:label="lab_arcc_HPRSSBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HP RSS Buyer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HPRSSBuyerInc.Member" xlink:href="arcc-20241231.xsd#arcc_HPRSSBuyerInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HPRSSBuyerInc.Member" xlink:to="lab_arcc_HPRSSBuyerInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MnpiDiscTimedForCompValFlag_terseLabel_en-US" xlink:label="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MNPI Disclosure Timed for Compensation Value</link:label>
    <link:label id="lab_ecd_MnpiDiscTimedForCompValFlag_label_en-US" xlink:label="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MNPI Disclosure Timed for Compensation Value [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_MnpiDiscTimedForCompValFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:to="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SaleOfStockGrossProceedsReceived_3b20b4df-17b9-4e26-a9c5-9f9bf3090c18_terseLabel_en-US" xlink:label="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross Proceeds</link:label>
    <link:label id="lab_arcc_SaleOfStockGrossProceedsReceived_label_en-US" xlink:label="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Gross Proceeds Received</link:label>
    <link:label id="lab_arcc_SaleOfStockGrossProceedsReceived_documentation_en-US" xlink:label="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sale of Stock, Gross Proceeds Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SaleOfStockGrossProceedsReceived" xlink:href="arcc-20241231.xsd#arcc_SaleOfStockGrossProceedsReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SaleOfStockGrossProceedsReceived" xlink:to="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember_label_en-US" xlink:label="lab_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Fair Values Of Investments Not Being Readily Determinable [Member]</link:label>
    <link:label id="lab_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember_documentation_en-US" xlink:label="lab_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Fair Values Of Investments Not Being Readily Determinable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember" xlink:to="lab_arcc_RiskOfFairValuesOfInvestmentsNotBeingReadilyDeterminableMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HigginbothamInsuranceAgencyInc.Member_3260b10e-f555-40bd-a980-87fdb8999507_terseLabel_en-US" xlink:label="lab_arcc_HigginbothamInsuranceAgencyInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Higginbotham Insurance Agency, Inc.</link:label>
    <link:label id="lab_arcc_HigginbothamInsuranceAgencyInc.Member_label_en-US" xlink:label="lab_arcc_HigginbothamInsuranceAgencyInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Higginbotham Insurance Agency, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HigginbothamInsuranceAgencyInc.Member_documentation_en-US" xlink:label="lab_arcc_HigginbothamInsuranceAgencyInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Higginbotham Insurance Agency, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HigginbothamInsuranceAgencyInc.Member" xlink:href="arcc-20241231.xsd#arcc_HigginbothamInsuranceAgencyInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HigginbothamInsuranceAgencyInc.Member" xlink:to="lab_arcc_HigginbothamInsuranceAgencyInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VisualEdgeTechnologyIncMember_e5776a38-ce7c-4f77-834a-aef41aeac71c_terseLabel_en-US" xlink:label="lab_arcc_VisualEdgeTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Visual Edge Technology, Inc.</link:label>
    <link:label id="lab_arcc_VisualEdgeTechnologyIncMember_label_en-US" xlink:label="lab_arcc_VisualEdgeTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Visual Edge Technology, Inc. [Member]</link:label>
    <link:label id="lab_arcc_VisualEdgeTechnologyIncMember_documentation_en-US" xlink:label="lab_arcc_VisualEdgeTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Visual Edge Technology, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VisualEdgeTechnologyIncMember" xlink:href="arcc-20241231.xsd#arcc_VisualEdgeTechnologyIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VisualEdgeTechnologyIncMember" xlink:to="lab_arcc_VisualEdgeTechnologyIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquity_61891dd3-6c92-4f49-92ca-6b4aba7ca8bd_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_67135d3a-5dd0-4997-aed6-a157f07a8779_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_1c44754c-7171-4295-a0df-f050af9ca9e3_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_794e251d-446a-4c20-adfb-223e1d95d28c_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_2c497854-0f3d-422e-a1a9-6a1105f22703_verboseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net assets at end of period</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity, Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity" xlink:to="lab_us-gaap_StockholdersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember_ce66a327-5836-4e0d-9b92-041d41c98377_terseLabel_en-US" xlink:label="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proprietary Portfolio Management Software Agreement</link:label>
    <link:label id="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember_label_en-US" xlink:label="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proprietary Portfolio Management Software Agreement [Member]</link:label>
    <link:label id="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember_documentation_en-US" xlink:label="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proprietary Portfolio Management Software Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:href="arcc-20241231.xsd#arcc_ProprietaryPortfolioManagementSoftwareAgreementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:to="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember_d1b087dd-5a01-4672-872b-2a06e99c6c14_terseLabel_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember_label_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Equity Investment [Member]</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember_documentation_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Equity Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:href="arcc-20241231.xsd#arcc_IvyHillAssetManagementLPEquityInvestmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:to="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CalyxEnergyIIILLCMember_5495941b-c409-4d0d-9f87-da70896ed411_terseLabel_en-US" xlink:label="lab_arcc_CalyxEnergyIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Calyx Energy III, LLC</link:label>
    <link:label id="lab_arcc_CalyxEnergyIIILLCMember_label_en-US" xlink:label="lab_arcc_CalyxEnergyIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Calyx Energy III, LLC [Member]</link:label>
    <link:label id="lab_arcc_CalyxEnergyIIILLCMember_documentation_en-US" xlink:label="lab_arcc_CalyxEnergyIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Calyx Energy III, LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CalyxEnergyIIILLCMember" xlink:to="lab_arcc_CalyxEnergyIIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractTable_c2d35be8-e1af-403b-8428-680d2b91465d_verboseLabel_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractTable" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract [Table]</link:label>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractTable_label_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OpenForwardForeignCurrencyContractTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OpenForwardForeignCurrencyContractTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OpenForwardForeignCurrencyContractTable" xlink:to="lab_us-gaap_OpenForwardForeignCurrencyContractTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember_46bc6e93-2fd4-483d-8177-d68a3b4da7fb_terseLabel_en-US" xlink:label="lab_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North Haven Falcon Buyer, LLC and North Haven Falcon Holding Company, LLC</link:label>
    <link:label id="lab_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember_label_en-US" xlink:label="lab_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North Haven Falcon Buyer, LLC and North Haven Falcon Holding Company, LLC [Member]</link:label>
    <link:label id="lab_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember_documentation_en-US" xlink:label="lab_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North Haven Falcon Buyer, LLC and North Haven Falcon Holding Company, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember" xlink:href="arcc-20241231.xsd#arcc_NorthHavenFalconBuyerLLCAndNorthHavenFalconHoldingCompanyLLCMember"/>
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    <link:label id="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_8fcb5dc5-a90a-40bf-aace-3d340c02a1eb_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Investments</link:label>
    <link:label id="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Holdings, Schedule of Investments [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:to="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_27082e22-5cdc-4fc7-b11b-3467e7e1aea3_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain" xlink:to="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MannaProProductsLLCMember_224d3d49-faf2-4db5-9283-1fe200dccb63_terseLabel_en-US" xlink:label="lab_arcc_MannaProProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Manna Pro Products, LLC</link:label>
    <link:label id="lab_arcc_MannaProProductsLLCMember_label_en-US" xlink:label="lab_arcc_MannaProProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Manna Pro Products, LLC [Member]</link:label>
    <link:label id="lab_arcc_MannaProProductsLLCMember_documentation_en-US" xlink:label="lab_arcc_MannaProProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Manna Pro Products, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MannaProProductsLLCMember" xlink:href="arcc-20241231.xsd#arcc_MannaProProductsLLCMember"/>
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    <link:label id="lab_arcc_ElevationServicesParentHoldingsLLCMember_ff752dd9-4769-491a-bbfc-ab299180978c_terseLabel_en-US" xlink:label="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Elevation Services Parent Holdings, LLC</link:label>
    <link:label id="lab_arcc_ElevationServicesParentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Elevation Services Parent Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_ElevationServicesParentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Elevation Services Parent Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ElevationServicesParentHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_ElevationServicesParentHoldingsLLCMember"/>
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    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_b3cd1770-f00d-4ce3-8f22-e47c0d5636b1_terseLabel_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount</link:label>
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_label_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters of Credit Outstanding, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LettersOfCreditOutstandingAmount" xlink:to="lab_us-gaap_LettersOfCreditOutstandingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_A2024ConvertibleNotesMember_69a8a79f-f12b-41b0-8435-aace2671c0cd_verboseLabel_en-US" xlink:label="lab_arcc_A2024ConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2024 Convertible Notes</link:label>
    <link:label id="lab_arcc_A2024ConvertibleNotesMember_fb1932f7-4f63-4fff-9af3-e66bb39f5e6f_terseLabel_en-US" xlink:label="lab_arcc_A2024ConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024 Convertible Notes (principal amount outstanding of $0 and $403, respectively)</link:label>
    <link:label id="lab_arcc_A2024ConvertibleNotesMember_label_en-US" xlink:label="lab_arcc_A2024ConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">2024 Convertible Notes [Member]</link:label>
    <link:label id="lab_arcc_A2024ConvertibleNotesMember_documentation_en-US" xlink:label="lab_arcc_A2024ConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2024 Convertible Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_A2024ConvertibleNotesMember" xlink:href="arcc-20241231.xsd#arcc_A2024ConvertibleNotesMember"/>
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    <link:label id="lab_us-gaap_RepaymentsOfConvertibleDebt_8d1b4b5a-c74e-435b-9bd6-fb76533473a1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfConvertibleDebt" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayment of 2024 Convertible Notes</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfConvertibleDebt_b4b68a76-2545-4daa-8c56-ec8cc2412d06_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfConvertibleDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayment of 2024 Convertible Notes</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfConvertibleDebt_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfConvertibleDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Convertible Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfConvertibleDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfConvertibleDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfConvertibleDebt" xlink:to="lab_us-gaap_RepaymentsOfConvertibleDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RDHoldcoIncMember_3810b893-9af7-47c7-bc8c-6906104c7a72_terseLabel_en-US" xlink:label="lab_arcc_RDHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RD Holdco Inc.</link:label>
    <link:label id="lab_arcc_RDHoldcoIncMember_label_en-US" xlink:label="lab_arcc_RDHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RD Holdco Inc. [Member]</link:label>
    <link:label id="lab_arcc_RDHoldcoIncMember_documentation_en-US" xlink:label="lab_arcc_RDHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RD Holdco Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RDHoldcoIncMember" xlink:href="arcc-20241231.xsd#arcc_RDHoldcoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RDHoldcoIncMember" xlink:to="lab_arcc_RDHoldcoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember_93204c48-a80b-4204-90c8-ab863a6d856e_terseLabel_en-US" xlink:label="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc.</link:label>
    <link:label id="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember_label_en-US" xlink:label="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:to="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember_0e56b678-e488-484c-8dcf-ef300edd8294_terseLabel_en-US" xlink:label="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sun Acquirer Corp. and Sun TopCo, LP</link:label>
    <link:label id="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember_label_en-US" xlink:label="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sun Acquirer Corp. and Sun TopCo, LP [Member]</link:label>
    <link:label id="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sun Acquirer Corp. and Sun TopCo, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:href="arcc-20241231.xsd#arcc_SunAcquirerCorpAndSunTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:to="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember_ef1d4179-b038-4532-b152-c0b34d7eeae2_terseLabel_en-US" xlink:label="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC</link:label>
    <link:label id="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember_label_en-US" xlink:label="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC [Member]</link:label>
    <link:label id="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember_documentation_en-US" xlink:label="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:href="arcc-20241231.xsd#arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember"/>
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    <link:label id="lab_us-gaap_SaleOfStockNameOfTransactionDomain_05af6a6a-45a8-4846-be92-afbd2fa1a88e_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_SaleOfStockNameOfTransactionDomain_label_en-US" xlink:label="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_5b2f291a-c2a2-4b75-b551-3941895d5f38_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentFiscalPeriodFocus"/>
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    <link:label id="lab_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember_label_en-US" xlink:label="lab_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Investors May Not Receive Dividends Or Interest Income [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Investors May Not Receive Dividends Or Interest Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember" xlink:to="lab_arcc_RiskOfInvestorsMayNotReceiveDividendsOrInterestIncomeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllExecutiveCategoriesMember_terseLabel_en-US" xlink:label="lab_ecd_AllExecutiveCategoriesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Executive Categories</link:label>
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    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_a2a8a60e-338e-40e2-9064-3fccd4c2dc0f_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position Location, Balance [Domain]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationDomain" xlink:to="lab_us-gaap_BalanceSheetLocationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember_label_en-US" xlink:label="lab_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Dependency On Ability To Manage Future Growth [Member]</link:label>
    <link:label id="lab_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember_documentation_en-US" xlink:label="lab_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Dependency On Ability To Manage Future Growth</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember" xlink:to="lab_arcc_RiskOfDependencyOnAbilityToManageFutureGrowthMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember_48ea99bb-4b6b-42bc-9e7d-3e0e4d8fb324_terseLabel_en-US" xlink:label="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP</link:label>
    <link:label id="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember_label_en-US" xlink:label="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP [Member]</link:label>
    <link:label id="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP</link:label>
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    <link:label id="lab_ecd_ChangedPeerGroupFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changed Peer Group, Footnote</link:label>
    <link:label id="lab_ecd_ChangedPeerGroupFnTextBlock_label_en-US" xlink:label="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Changed Peer Group, Footnote [Text Block]</link:label>
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    <link:label id="lab_arcc_PublicStockOfferingMember_beecc706-db1e-4082-8ff6-58d504a173f4_terseLabel_en-US" xlink:label="lab_arcc_PublicStockOfferingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Public offerings</link:label>
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    <link:label id="lab_arcc_PublicStockOfferingMember_documentation_en-US" xlink:label="lab_arcc_PublicStockOfferingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Public Stock Offering Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PublicStockOfferingMember" xlink:href="arcc-20241231.xsd#arcc_PublicStockOfferingMember"/>
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    <link:label id="lab_us-gaap_AssetsAbstract_c34e761a-4bd2-4f19-82e9-a290c84c2a98_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_bc131999-a52c-451a-a100-b3639e1d59c9_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_d26d3704-a944-4403-8e3d-8ee7a0143e62_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_5c6028b1-d561-4d2d-ba54-084a199bdd9f_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of line of credit commitment</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Commitment Fee Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:to="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_621ddbd6-45b0-4faa-a4ad-a552c4e03e6d_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain" xlink:to="lab_us-gaap_DerivativeContractTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember_label_en-US" xlink:label="lab_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Significant Investments Failing To Perform As Expected [Member]</link:label>
    <link:label id="lab_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember_documentation_en-US" xlink:label="lab_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Significant Investments Failing To Perform As Expected</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember" xlink:to="lab_arcc_RiskOfSignificantInvestmentsFailingToPerformAsExpectedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_8efd1cc7-afd7-46c2-adc4-c6a4b358a52b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Three</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Three [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember_4835afd7-8b03-4a5e-b58e-775e07907527_verboseLabel_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Subordinated loan</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember_label_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Debt Investment [Member]</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember_documentation_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Debt Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:href="arcc-20241231.xsd#arcc_IvyHillAssetManagementLPDebtInvestmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:to="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_567ad155-f5cb-4b68-bf7a-d93dbbf36f3f_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized and unrealized gains (losses) for period (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Gain (Loss) on Investment, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:to="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap2Member_dcfbe355-7be5-4c9d-b2e6-3d0240fa5092_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap 2</link:label>
    <link:label id="lab_arcc_InterestRateSwap2Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 2 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap2Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap2Member" xlink:href="arcc-20241231.xsd#arcc_InterestRateSwap2Member"/>
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    <link:label id="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember_ae2082b2-e161-4958-b47b-9f93cc280814_terseLabel_en-US" xlink:label="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GS SEER Group Borrower LLC and GS SEER Group Holdings, LLC</link:label>
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    <link:label id="lab_arcc_OtherOperatingExpensesMember_a3b7a4ed-092a-4da9-9a83-82c471395876_terseLabel_en-US" xlink:label="lab_arcc_OtherOperatingExpensesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating expenses</link:label>
    <link:label id="lab_arcc_OtherOperatingExpensesMember_label_en-US" xlink:label="lab_arcc_OtherOperatingExpensesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Operating Expenses [Member]</link:label>
    <link:label id="lab_arcc_OtherOperatingExpensesMember_documentation_en-US" xlink:label="lab_arcc_OtherOperatingExpensesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Operating Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OtherOperatingExpensesMember" xlink:href="arcc-20241231.xsd#arcc_OtherOperatingExpensesMember"/>
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    <link:label id="lab_us-gaap_ExciseAndSalesTaxes_7dcfaf34-c0cd-4a57-97a2-72f25a4d75ea_terseLabel_en-US" xlink:label="lab_us-gaap_ExciseAndSalesTaxes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excise tax expense</link:label>
    <link:label id="lab_us-gaap_ExciseAndSalesTaxes_label_en-US" xlink:label="lab_us-gaap_ExciseAndSalesTaxes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excise and Sales Taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExciseAndSalesTaxes" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ExciseAndSalesTaxes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExciseAndSalesTaxes" xlink:to="lab_us-gaap_ExciseAndSalesTaxes" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_November2031NotesMember_1f6b4d64-c4bf-451a-8ebb-87ef453e6b3f_verboseLabel_en-US" xlink:label="lab_arcc_November2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">November 2031 Notes</link:label>
    <link:label id="lab_arcc_November2031NotesMember_13a0627d-ffe6-4358-bd21-235d5d600610_terseLabel_en-US" xlink:label="lab_arcc_November2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">November 2031 Notes (principal amount outstanding of $700)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_November2031NotesMember" xlink:href="arcc-20241231.xsd#arcc_November2031NotesMember"/>
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    <link:label id="lab_us-gaap_InvestmentIdentifierAxis_cf7d42b9-f9d9-4beb-b7c5-2e5903e0148f_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Identifier [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIdentifierAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Identifier [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIdentifierAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIdentifierAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIdentifierAxis" xlink:to="lab_us-gaap_InvestmentIdentifierAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember_6c7bb1b2-2098-4e81-bf5c-2a85faf3dd69_terseLabel_en-US" xlink:label="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marmic Purchaser, LLC and Marmic Topco, L.P.</link:label>
    <link:label id="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember_label_en-US" xlink:label="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marmic Purchaser, LLC and Marmic Topco, L.P. [Member]</link:label>
    <link:label id="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Marmic Purchaser, LLC and Marmic Topco, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember" xlink:href="arcc-20241231.xsd#arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember" xlink:to="lab_arcc_MarmicPurchaserLLCAndMarmicTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember_label_en-US" xlink:label="lab_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Inability To Exert Influence On Portfolio Companies [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Inability To Exert Influence On Portfolio Companies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember" xlink:to="lab_arcc_RiskOfInabilityToExertInfluenceOnPortfolioCompaniesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTable_4cec427b-aa0a-4660-a135-4edf9e3f93b7_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTable_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTable" xlink:to="lab_us-gaap_SubsequentEventTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember_28bfa072-dcd2-43fd-b726-50bf1c0f1db4_terseLabel_en-US" xlink:label="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P.</link:label>
    <link:label id="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember_label_en-US" xlink:label="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember_documentation_en-US" xlink:label="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember" xlink:href="arcc-20241231.xsd#arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember" xlink:to="lab_arcc_IRIHoldingsIncIRIGroupHoldingsIncAndIRIParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MaximumMember_87ff55dc-2c2d-46a8-a0af-b9fd10ead772_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember" xlink:to="lab_srt_MaximumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncentiveFeePayable_89ac15ff-7f80-413f-8932-5ad5a2326a39_terseLabel_en-US" xlink:label="lab_us-gaap_IncentiveFeePayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains incentive fee payable</link:label>
    <link:label id="lab_us-gaap_IncentiveFeePayable_label_en-US" xlink:label="lab_us-gaap_IncentiveFeePayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incentive Fee Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncentiveFeePayable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncentiveFeePayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncentiveFeePayable" xlink:to="lab_us-gaap_IncentiveFeePayable" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Valuation Assumption Difference, Footnote</link:label>
    <link:label id="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock_label_en-US" xlink:label="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Valuation Assumption Difference, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_EquityValuationAssumptionDifferenceFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:to="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KingsBuyerLLCMember_21d8d339-0bd5-403b-abd3-1df2a05565dd_terseLabel_en-US" xlink:label="lab_arcc_KingsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kings Buyer, LLC</link:label>
    <link:label id="lab_arcc_KingsBuyerLLCMember_label_en-US" xlink:label="lab_arcc_KingsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kings Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_KingsBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_KingsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kings Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KingsBuyerLLCMember" xlink:href="arcc-20241231.xsd#arcc_KingsBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KingsBuyerLLCMember" xlink:to="lab_arcc_KingsBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentTypeAxis_616f23c4-211d-4009-8651-e7bcdcac6a25_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Type [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeAxis" xlink:to="lab_us-gaap_InvestmentTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_b1d6410c-3068-499a-9fec-dd475f621cd6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SharesIssuedPricePerShare_b4ac9d79-75eb-476e-9ce8-da495229c57e_terseLabel_en-US" xlink:label="lab_us-gaap_SharesIssuedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average issue price per share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_SharesIssuedPricePerShare_label_en-US" xlink:label="lab_us-gaap_SharesIssuedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Issued, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssuedPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharesIssuedPricePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesIssuedPricePerShare" xlink:to="lab_us-gaap_SharesIssuedPricePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerDurablesAndApparelSectorMember_8373d572-be7a-4e65-9b37-f2885aa3486d_terseLabel_en-US" xlink:label="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Durables and Apparel</link:label>
    <link:label id="lab_arcc_ConsumerDurablesAndApparelSectorMember_label_en-US" xlink:label="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Durables And Apparel Sector [Member]</link:label>
    <link:label id="lab_arcc_ConsumerDurablesAndApparelSectorMember_documentation_en-US" xlink:label="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Durables And Apparel Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerDurablesAndApparelSectorMember" xlink:href="arcc-20241231.xsd#arcc_ConsumerDurablesAndApparelSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsumerDurablesAndApparelSectorMember" xlink:to="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SoftwareAndServicesMember_f041d722-bbfb-44c0-89de-4b59321ba2a3_terseLabel_en-US" xlink:label="lab_arcc_SoftwareAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Software and Services</link:label>
    <link:label id="lab_arcc_SoftwareAndServicesMember_label_en-US" xlink:label="lab_arcc_SoftwareAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Software And Services [Member]</link:label>
    <link:label id="lab_arcc_SoftwareAndServicesMember_documentation_en-US" xlink:label="lab_arcc_SoftwareAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Software And Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SoftwareAndServicesMember" xlink:href="arcc-20241231.xsd#arcc_SoftwareAndServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SoftwareAndServicesMember" xlink:to="lab_arcc_SoftwareAndServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BorrowerR365HoldingsLLCMember_83e293c3-6806-49e8-82e7-89968ee26898_terseLabel_en-US" xlink:label="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrower R365 Holdings LLC</link:label>
    <link:label id="lab_arcc_BorrowerR365HoldingsLLCMember_label_en-US" xlink:label="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrower R365 Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_BorrowerR365HoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Borrower R365 Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BorrowerR365HoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_BorrowerR365HoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BorrowerR365HoldingsLLCMember" xlink:to="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction_615de9c6-ec59-4605-b5f1-a1a629170be7_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related party transaction amounts payable</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction, Amounts of Transaction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:to="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_67a9e423-d91a-434e-91be-59ecb56a979d_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis" xlink:to="lab_srt_RangeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonRule10b51ArrTrmntdFlag_terseLabel_en-US" xlink:label="lab_ecd_NonRule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Terminated</link:label>
    <link:label id="lab_ecd_NonRule10b51ArrTrmntdFlag_label_en-US" xlink:label="lab_ecd_NonRule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Terminated [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrTrmntdFlag" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_NonRule10b51ArrTrmntdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonRule10b51ArrTrmntdFlag" xlink:to="lab_ecd_NonRule10b51ArrTrmntdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember_8417ede2-f775-4742-9ab9-4ebc62213c93_terseLabel_en-US" xlink:label="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RE Community Holdings GP, LLC and RE Community Holdings, LP</link:label>
    <link:label id="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember_label_en-US" xlink:label="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RE Community Holdings GP, LLC and RE Community Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RE Community Holdings GP, LLC and RE Community Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:to="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoAvgTotalCompAmt_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Total Compensation Amount</link:label>
    <link:label id="lab_ecd_NonPeoNeoAvgTotalCompAmt_label_en-US" xlink:label="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Total Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_NonPeoNeoAvgTotalCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:to="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember_label_en-US" xlink:label="lab_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Receiving Shares Of Common Stock As Dividends [Member]</link:label>
    <link:label id="lab_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Receiving Shares Of Common Stock As Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember" xlink:to="lab_arcc_RiskOfReceivingSharesOfCommonStockAsDividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncentiveFeeExpenseReversal_ec48de47-df64-46e6-9e80-a9e1063abcb9_terseLabel_en-US" xlink:label="lab_arcc_IncentiveFeeExpenseReversal" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains incentive fee</link:label>
    <link:label id="lab_arcc_IncentiveFeeExpenseReversal_label_en-US" xlink:label="lab_arcc_IncentiveFeeExpenseReversal" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incentive Fee Expense (Reversal)</link:label>
    <link:label id="lab_arcc_IncentiveFeeExpenseReversal_documentation_en-US" xlink:label="lab_arcc_IncentiveFeeExpenseReversal" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Incentive Fee Expense (Reversal)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncentiveFeeExpenseReversal" xlink:href="arcc-20241231.xsd#arcc_IncentiveFeeExpenseReversal"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncentiveFeeExpenseReversal" xlink:to="lab_arcc_IncentiveFeeExpenseReversal" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MitchellInternationalIncMember_7222e0d1-57e3-452b-9cc8-f76e8deec467_terseLabel_en-US" xlink:label="lab_arcc_MitchellInternationalIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mitchell International, Inc.</link:label>
    <link:label id="lab_arcc_MitchellInternationalIncMember_label_en-US" xlink:label="lab_arcc_MitchellInternationalIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mitchell International, Inc. [Member]</link:label>
    <link:label id="lab_arcc_MitchellInternationalIncMember_documentation_en-US" xlink:label="lab_arcc_MitchellInternationalIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mitchell International, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MitchellInternationalIncMember" xlink:href="arcc-20241231.xsd#arcc_MitchellInternationalIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MitchellInternationalIncMember" xlink:to="lab_arcc_MitchellInternationalIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingRecoveryIndName_terseLabel_en-US" xlink:label="lab_ecd_OutstandingRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_OutstandingRecoveryIndName_label_en-US" xlink:label="lab_ecd_OutstandingRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Recovery, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_OutstandingRecoveryIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingRecoveryIndName" xlink:to="lab_ecd_OutstandingRecoveryIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_1f304eb1-5aba-4e41-82b0-b0cc9056bfcc_totalLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net realized (losses) gains</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_57057f65-a266-43e3-8e0b-d70a5296050f_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net realized losses (gains) on investments, foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_a569e566-1927-47b0-a2cf-89252f05393c_verboseLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses) on investments and other transactions</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_label_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:to="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevolvingFundingFacilityMember_a0fb0765-3475-472f-bc56-8a9af31b80c3_terseLabel_en-US" xlink:label="lab_arcc_RevolvingFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Funding Facility</link:label>
    <link:label id="lab_arcc_RevolvingFundingFacilityMember_label_en-US" xlink:label="lab_arcc_RevolvingFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Funding Facility [Member]</link:label>
    <link:label id="lab_arcc_RevolvingFundingFacilityMember_documentation_en-US" xlink:label="lab_arcc_RevolvingFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving Funding Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevolvingFundingFacilityMember" xlink:href="arcc-20241231.xsd#arcc_RevolvingFundingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevolvingFundingFacilityMember" xlink:to="lab_arcc_RevolvingFundingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember_ad3d4e6d-749c-47f1-b8a5-ef70866d7597_terseLabel_en-US" xlink:label="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Heelstone Renewable Energy, LLC</link:label>
    <link:label id="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember_label_en-US" xlink:label="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Heelstone Renewable Energy, LLC and Heelstone Renewable Energy Investors, LLC [Member]</link:label>
    <link:label id="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember_documentation_en-US" xlink:label="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Heelstone Renewable Energy, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember" xlink:href="arcc-20241231.xsd#arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember" xlink:to="lab_arcc_HeelstoneRenewableEnergyLLCAndHeelstoneRenewableEnergyInvestorsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2022M22DividendsMember_4ede9d66-df47-4924-be05-8271ea7cc428_terseLabel_en-US" xlink:label="lab_arcc_O2022M22DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 9, 2022</link:label>
    <link:label id="lab_arcc_O2022M22DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M22DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M2 2 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M22DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M22DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2022 M2 2 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022M22DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022M22DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2022M22DividendsMember" xlink:to="lab_arcc_O2022M22DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember_c53fac5b-5e06-4926-a600-1e99d67832cb_terseLabel_en-US" xlink:label="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alcami Corporation and ACM Holdings I, LLC</link:label>
    <link:label id="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember_label_en-US" xlink:label="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alcami Corporation and ACM Holdings I, LLC [Member]</link:label>
    <link:label id="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember_documentation_en-US" xlink:label="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alcami Corporation and ACM Holdings I, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AlcamiCorporationAndACMHoldingsILLCMember" xlink:href="arcc-20241231.xsd#arcc_AlcamiCorporationAndACMHoldingsILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AlcamiCorporationAndACMHoldingsILLCMember" xlink:to="lab_arcc_AlcamiCorporationAndACMHoldingsILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember_a2d549f3-93e0-4921-8399-b3791e005137_terseLabel_en-US" xlink:label="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convera International Holdings Limited and Convera International Financial S.A R.L.</link:label>
    <link:label id="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember_label_en-US" xlink:label="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Convera International Holdings Limited and Convera International Financial S.A R.L. [Member]</link:label>
    <link:label id="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember_documentation_en-US" xlink:label="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Convera International Holdings Limited and Convera International Financial S.A R.L.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:href="arcc-20241231.xsd#arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:to="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD1Member_96817708-64af-4598-a7ac-05a7f0e7556a_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:href="arcc-20241231.xsd#arcc_ForeignCurrencyForwardContractCAD1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgPredtrmndFlag_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgPredtrmndFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing Predetermined</link:label>
    <link:label id="lab_ecd_AwardTmgPredtrmndFlag_label_en-US" xlink:label="lab_ecd_AwardTmgPredtrmndFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Predetermined [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgPredtrmndFlag" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardTmgPredtrmndFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgPredtrmndFlag" xlink:to="lab_ecd_AwardTmgPredtrmndFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AthyriumBuffaloLPMember_a5d135dd-e399-41f4-926f-68c3da82f36f_terseLabel_en-US" xlink:label="lab_arcc_AthyriumBuffaloLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Athyrium Buffalo LP</link:label>
    <link:label id="lab_arcc_AthyriumBuffaloLPMember_label_en-US" xlink:label="lab_arcc_AthyriumBuffaloLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Athyrium Buffalo LP [Member]</link:label>
    <link:label id="lab_arcc_AthyriumBuffaloLPMember_documentation_en-US" xlink:label="lab_arcc_AthyriumBuffaloLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Athyrium Buffalo LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AthyriumBuffaloLPMember" xlink:href="arcc-20241231.xsd#arcc_AthyriumBuffaloLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AthyriumBuffaloLPMember" xlink:to="lab_arcc_AthyriumBuffaloLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_8d8c2047-ea06-48b3-bf5d-c2ff4c3557a2_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain" xlink:to="lab_us-gaap_SubsequentEventTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PayableInvestmentPurchase_9ba41cba-85ac-48f3-b65c-076ca6fd7fc4_terseLabel_en-US" xlink:label="lab_us-gaap_PayableInvestmentPurchase" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payable for open trades</link:label>
    <link:label id="lab_us-gaap_PayableInvestmentPurchase_label_en-US" xlink:label="lab_us-gaap_PayableInvestmentPurchase" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payable, Investment, Purchase</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PayableInvestmentPurchase" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PayableInvestmentPurchase"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PayableInvestmentPurchase" xlink:to="lab_us-gaap_PayableInvestmentPurchase" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_IHAMVehiclesMember_046daa9d-edf6-4ce9-89ec-b2f93e0c5e31_terseLabel_en-US" xlink:label="lab_arcc_IHAMVehiclesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated IHAM Vehicles</link:label>
    <link:label id="lab_arcc_IHAMVehiclesMember_label_en-US" xlink:label="lab_arcc_IHAMVehiclesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IHAM Vehicles [Member]</link:label>
    <link:label id="lab_arcc_IHAMVehiclesMember_documentation_en-US" xlink:label="lab_arcc_IHAMVehiclesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IHAM Vehicles</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IHAMVehiclesMember" xlink:href="arcc-20241231.xsd#arcc_IHAMVehiclesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IHAMVehiclesMember" xlink:to="lab_arcc_IHAMVehiclesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestExpense_140570b2-7ae4-4b3c-8697-f6ef8cec116a_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and credit facility fees</link:label>
    <link:label id="lab_us-gaap_InterestExpense_022f1037-44d8-40da-ac5e-dfb1ab415c0b_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_c8a0a1ee-2c1d-48a5-8ad5-82f706a3417a_totalLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Interest and credit facility fees</link:label>
    <link:label id="lab_us-gaap_InterestExpense_label_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Operating and Nonoperating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense" xlink:to="lab_us-gaap_InterestExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllAdjToCompMember_terseLabel_en-US" xlink:label="lab_ecd_AllAdjToCompMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Adjustments to Compensation</link:label>
    <link:label id="lab_ecd_AllAdjToCompMember_label_en-US" xlink:label="lab_ecd_AllAdjToCompMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Adjustments to Compensation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllAdjToCompMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AllAdjToCompMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="lab_ecd_AllAdjToCompMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputEbitdaMultipleMember_51db2bf7-56a0-4e6f-9a10-6c488955937f_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBITDA multiple</link:label>
    <link:label id="lab_us-gaap_MeasurementInputEbitdaMultipleMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, EBITDA Multiple [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputEbitdaMultipleMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:to="lab_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BRPJKProduceLLCMember_99aa7695-3489-4d50-bce8-375ff7bc1bfc_terseLabel_en-US" xlink:label="lab_arcc_BRPJKProduceLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BR PJK Produce, LLC</link:label>
    <link:label id="lab_arcc_BRPJKProduceLLCMember_label_en-US" xlink:label="lab_arcc_BRPJKProduceLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BR PJK Produce, LLC [Member]</link:label>
    <link:label id="lab_arcc_BRPJKProduceLLCMember_documentation_en-US" xlink:label="lab_arcc_BRPJKProduceLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BR PJK Produce, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BRPJKProduceLLCMember" xlink:href="arcc-20241231.xsd#arcc_BRPJKProduceLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BRPJKProduceLLCMember" xlink:to="lab_arcc_BRPJKProduceLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BeaconPointeHarmonyLLCMember_a289c6e4-930c-49fc-ad9d-88e84212f120_terseLabel_en-US" xlink:label="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Beacon Pointe Harmony, LLC</link:label>
    <link:label id="lab_arcc_BeaconPointeHarmonyLLCMember_label_en-US" xlink:label="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Beacon Pointe Harmony, LLC [Member]</link:label>
    <link:label id="lab_arcc_BeaconPointeHarmonyLLCMember_documentation_en-US" xlink:label="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Beacon Pointe Harmony, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BeaconPointeHarmonyLLCMember" xlink:href="arcc-20241231.xsd#arcc_BeaconPointeHarmonyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BeaconPointeHarmonyLLCMember" xlink:to="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_d1bccc08-455c-4982-a8d8-f335f217b694_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Table]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember_84dc9884-48ad-444e-bab6-369b8c5cb12d_terseLabel_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC and SageSure LLC</link:label>
    <link:label id="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember_label_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC and SageSure LLC [Member]</link:label>
    <link:label id="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember_documentation_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC and SageSure LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:href="arcc-20241231.xsd#arcc_SageSureHoldingsLLCAndSageSureLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:to="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember_11d9e8ef-ae52-4fca-a814-57f7f5d5b503_terseLabel_en-US" xlink:label="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Activate Holdings (US) Corp. and CrossPoint Capital AS SPV, LP</link:label>
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    <link:label id="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember_documentation_en-US" xlink:label="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Activate Holdings (US) Corp. and CrossPoint Capital AS SPV, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:href="arcc-20241231.xsd#arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:to="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LegalEntityAxis_5d7fead3-be73-4b60-a3bd-93c945bde836_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member_3a6bed4a-997f-46e7-9c6a-9eb0d9be8123_terseLabel_en-US" xlink:label="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Centralsquare Technologies, LLC and Supermoose Newco, Inc.</link:label>
    <link:label id="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member_label_en-US" xlink:label="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Centralsquare Technologies, LLC and Supermoose Newco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member_documentation_en-US" xlink:label="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Centralsquare Technologies, LLC and Supermoose Newco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:href="arcc-20241231.xsd#arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:to="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember_label_en-US" xlink:label="lab_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Shares Trading At A Discount From Net Asset Value [Member]</link:label>
    <link:label id="lab_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember_documentation_en-US" xlink:label="lab_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Shares Trading At A Discount From Net Asset Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember" xlink:to="lab_arcc_RiskOfSharesTradingAtADiscountFromNetAssetValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecurities_4b963880-928c-47e7-995d-c86e736a287d_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecurities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment income</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecurities_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecurities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Dividend Income, Securities, Operating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestAndDividendIncomeSecurities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecurities" xlink:to="lab_us-gaap_InterestAndDividendIncomeSecurities" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfInvestmentsInForeignCompaniesMember_label_en-US" xlink:label="lab_arcc_RiskOfInvestmentsInForeignCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Investments In Foreign Companies [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInvestmentsInForeignCompaniesMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInvestmentsInForeignCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Investments In Foreign Companies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInvestmentsInForeignCompaniesMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInvestmentsInForeignCompaniesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInvestmentsInForeignCompaniesMember" xlink:to="lab_arcc_RiskOfInvestmentsInForeignCompaniesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BaseManagementFeesMember_58a46c51-55ab-4c63-bf97-ea1468031b3e_terseLabel_en-US" xlink:label="lab_arcc_BaseManagementFeesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee</link:label>
    <link:label id="lab_arcc_BaseManagementFeesMember_label_en-US" xlink:label="lab_arcc_BaseManagementFeesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Management Fees [Member]</link:label>
    <link:label id="lab_arcc_BaseManagementFeesMember_documentation_en-US" xlink:label="lab_arcc_BaseManagementFeesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Base Management Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BaseManagementFeesMember" xlink:href="arcc-20241231.xsd#arcc_BaseManagementFeesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BaseManagementFeesMember" xlink:to="lab_arcc_BaseManagementFeesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConvertibleUnsecuredNotesMember_b57d831e-dbab-45d8-9ce0-eccf68e683bb_terseLabel_en-US" xlink:label="lab_arcc_ConvertibleUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible Unsecured Notes</link:label>
    <link:label id="lab_arcc_ConvertibleUnsecuredNotesMember_label_en-US" xlink:label="lab_arcc_ConvertibleUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Convertible Unsecured Notes [Member]</link:label>
    <link:label id="lab_arcc_ConvertibleUnsecuredNotesMember_documentation_en-US" xlink:label="lab_arcc_ConvertibleUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Convertible Unsecured Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConvertibleUnsecuredNotesMember" xlink:href="arcc-20241231.xsd#arcc_ConvertibleUnsecuredNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConvertibleUnsecuredNotesMember" xlink:to="lab_arcc_ConvertibleUnsecuredNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAxis_34f14e8c-220b-45b4-999a-dd19bc24a073_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAxis_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis" xlink:to="lab_us-gaap_RelatedPartyTransactionAxis" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_RestrictedCash_47ed2082-bb1b-4b68-ae12-3c0bfa9cb575_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_ca0759c2-415b-4948-aa85-1146a51ad639_verboseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_label_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCash" xlink:to="lab_us-gaap_RestrictedCash" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_BaseRateAfterReinvestmentPeriodMember_documentation_en-US" xlink:label="lab_arcc_BaseRateAfterReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Base Rate, After Reinvestment Period</link:label>
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    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_346ea6bb-2708-4ebb-a18f-86b05ab02b02_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain" xlink:to="lab_us-gaap_LongtermDebtTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_de9fc735-f70d-477c-8244-86a4b7257f4a_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember_d97cbfe6-4ecf-483c-80f0-8751748de09e_terseLabel_en-US" xlink:label="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ProfitSolv Purchaser, Inc. and PS Co-Invest, L.P.</link:label>
    <link:label id="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember_label_en-US" xlink:label="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ProfitSolv Purchaser, Inc. and PS Co-Invest, L.P. [Member]</link:label>
    <link:label id="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ProfitSolv Purchaser, Inc. and PS Co-Invest, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember" xlink:href="arcc-20241231.xsd#arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember" xlink:to="lab_arcc_ProfitSolvPurchaserIncAndPSCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AQSunshineIncMember_e994c4dd-769f-4a01-aa81-06685adb0023_terseLabel_en-US" xlink:label="lab_arcc_AQSunshineIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc.</link:label>
    <link:label id="lab_arcc_AQSunshineIncMember_label_en-US" xlink:label="lab_arcc_AQSunshineIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AQSunshineIncMember_documentation_en-US" xlink:label="lab_arcc_AQSunshineIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AQSunshineIncMember" xlink:href="arcc-20241231.xsd#arcc_AQSunshineIncMember"/>
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    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
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    <link:label id="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember_63c0b40c-b780-4177-8fb8-9c9e4bc6c00d_terseLabel_en-US" xlink:label="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC</link:label>
    <link:label id="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC</link:label>
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    <link:label id="lab_ecd_ErrCompAnalysisTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ErrCompAnalysisTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Erroneous Compensation Analysis</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompAnalysisTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_ErrCompAnalysisTextBlock"/>
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    <link:label id="lab_arcc_TempusAIInc.Member_d10da4a8-aad1-4a19-ab79-8c8ea12ca05c_terseLabel_en-US" xlink:label="lab_arcc_TempusAIInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tempus AI, Inc.</link:label>
    <link:label id="lab_arcc_TempusAIInc.Member_label_en-US" xlink:label="lab_arcc_TempusAIInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tempus AI, Inc. [Member]</link:label>
    <link:label id="lab_arcc_TempusAIInc.Member_documentation_en-US" xlink:label="lab_arcc_TempusAIInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tempus AI, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TempusAIInc.Member" xlink:href="arcc-20241231.xsd#arcc_TempusAIInc.Member"/>
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    <link:label id="lab_arcc_EchoPurchaserIncMember_c24a214f-1d22-45d4-a1f5-fc60e34feb71_terseLabel_en-US" xlink:label="lab_arcc_EchoPurchaserIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Echo Purchaser, Inc.</link:label>
    <link:label id="lab_arcc_EchoPurchaserIncMember_label_en-US" xlink:label="lab_arcc_EchoPurchaserIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Echo Purchaser, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EchoPurchaserIncMember_documentation_en-US" xlink:label="lab_arcc_EchoPurchaserIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Echo Purchaser, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EchoPurchaserIncMember" xlink:href="arcc-20241231.xsd#arcc_EchoPurchaserIncMember"/>
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    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_257fb1ee-1705-48fc-bf35-d3275ea24ade_terseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
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    <link:label id="lab_arcc_TotesIsotonerCorporationAndTotesUltimateHoldcoIncMember_40ff7a4c-17d7-48d7-b9b5-71831d617c13_terseLabel_en-US" xlink:label="lab_arcc_TotesIsotonerCorporationAndTotesUltimateHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Totes Isotoner Corporation and Totes Ultimate Holdco, Inc.</link:label>
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    <link:label id="lab_arcc_TotesIsotonerCorporationAndTotesUltimateHoldcoIncMember_documentation_en-US" xlink:label="lab_arcc_TotesIsotonerCorporationAndTotesUltimateHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Totes Isotoner Corporation and Totes Ultimate Holdco, Inc.</link:label>
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    <link:label id="lab_arcc_RiserMergerSubIncMember_1fb13548-0ed6-40ef-89c5-0f8a7572aae5_terseLabel_en-US" xlink:label="lab_arcc_RiserMergerSubIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Riser Merger Sub, Inc.</link:label>
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    <link:label id="lab_arcc_AmericanResidentialServicesLLCAndAragornParentHoldingsLPMember_95b2fa75-4fc5-449e-96fe-c1ab187fc02a_terseLabel_en-US" xlink:label="lab_arcc_AmericanResidentialServicesLLCAndAragornParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">American Residential Services L.L.C. and Aragorn Parent Holdings LP</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetInvestmentIncome"/>
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    <link:label id="lab_ecd_PvpTable_terseLabel_en-US" xlink:label="lab_ecd_PvpTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_PvpTable" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PvpTable"/>
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    <link:label id="lab_arcc_EPWealthAdvisorsLLCMember_258f0c91-c246-4a8e-a870-af4558f1c87b_terseLabel_en-US" xlink:label="lab_arcc_EPWealthAdvisorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EP Wealth Advisors, LLC</link:label>
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    <link:label id="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain_cb8f9d8a-e8ee-4ca8-ab14-7a68e27a8f71_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Support to Nonconsolidated Legal Entity [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompRecoveryTable" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_ErrCompRecoveryTable"/>
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    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_e1b0e8f8-974d-443a-a689-09b44e06d006_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Line Items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
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    <link:label id="lab_arcc_AerinMedicalInc.Member_6b052a00-6d73-412a-bd18-2c0eadbb589b_terseLabel_en-US" xlink:label="lab_arcc_AerinMedicalInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aerin Medical Inc.</link:label>
    <link:label id="lab_arcc_AerinMedicalInc.Member_label_en-US" xlink:label="lab_arcc_AerinMedicalInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aerin Medical Inc. [Member]</link:label>
    <link:label id="lab_arcc_AerinMedicalInc.Member_documentation_en-US" xlink:label="lab_arcc_AerinMedicalInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aerin Medical Inc.</link:label>
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    <link:label id="lab_arcc_IFHFranchiseeHoldingsLLCMember_fffa455a-a2ed-40d6-8311-809ab54d3200_terseLabel_en-US" xlink:label="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IFH Franchisee Holdings, LLC</link:label>
    <link:label id="lab_arcc_IFHFranchiseeHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IFH Franchisee Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_IFHFranchiseeHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IFH Franchisee Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IFHFranchiseeHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_IFHFranchiseeHoldingsLLCMember"/>
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    <link:label id="lab_arcc_WellpathHoldingsIncMember_79f0186e-5b10-4072-bd52-4e6bf0d5e33d_terseLabel_en-US" xlink:label="lab_arcc_WellpathHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wellpath Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_WellpathHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_WellpathHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wellpath Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WellpathHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_WellpathHoldingsIncMember"/>
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    <link:label id="lab_arcc_A3StepSportsLLCAnd3StepHoldingsLLCMember_1dca680d-28f2-462b-9c40-b456503e6ed6_terseLabel_en-US" xlink:label="lab_arcc_A3StepSportsLLCAnd3StepHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3 Step Sports LLC and 3 Step Holdings, LLC</link:label>
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    <link:label id="lab_arcc_A3StepSportsLLCAnd3StepHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_A3StepSportsLLCAnd3StepHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3 Step Sports LLC and 3 Step Holdings, LLC</link:label>
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    <link:label id="lab_arcc_RiskRelatedToCorporateSocialResponsibilityMember_label_en-US" xlink:label="lab_arcc_RiskRelatedToCorporateSocialResponsibilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Related To Corporate Social Responsibility [Member]</link:label>
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    <link:label id="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member_5c74b09c-2a35-4e45-80bb-076e7597b074_terseLabel_en-US" xlink:label="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Victors Purchaser, LLC and WP Victors Co-Investment, L.P.</link:label>
    <link:label id="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member_label_en-US" xlink:label="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Victors Purchaser, LLC and WP Victors Co-Investment, L.P. [Member]</link:label>
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    <link:label id="lab_arcc_SynergyHomeCareFranchisingLLCAndNPSynergyHoldingsLLCMember_e2c0d188-bd99-4c3c-985a-b9b0061b5a29_terseLabel_en-US" xlink:label="lab_arcc_SynergyHomeCareFranchisingLLCAndNPSynergyHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Synergy HomeCare Franchising, LLC and NP/Synergy Holdings, LLC</link:label>
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    <link:label id="lab_arcc_GraphPADSoftwareLLCInsightfulScienceIntermediateILLCAndInsightfulScienceHoldingsLLCMember_0ad23134-a67a-4e79-b403-c63313530aaf_terseLabel_en-US" xlink:label="lab_arcc_GraphPADSoftwareLLCInsightfulScienceIntermediateILLCAndInsightfulScienceHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC</link:label>
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    <link:label id="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember_86a69f7e-8409-4f27-8efa-f9fdeece7fc4_terseLabel_en-US" xlink:label="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional Fighters League, LLC and PFL MMA, Inc.</link:label>
    <link:label id="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember_label_en-US" xlink:label="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional Fighters League, LLC and PFL MMA, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember_documentation_en-US" xlink:label="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Professional Fighters League, LLC and PFL MMA, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember" xlink:href="arcc-20241231.xsd#arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember" xlink:to="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember_19358260-bfce-4712-945f-a24dfb53514b_terseLabel_en-US" xlink:label="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SiroMed Physician Services, Inc. and SiroMed Equity Holdings, LLC</link:label>
    <link:label id="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SiroMed Physician Services, Inc. and SiroMed Equity Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SiroMed Physician Services, Inc. and SiroMed Equity Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember" xlink:to="lab_arcc_SiroMedPhysicianServicesIncAndSiroMedEquityHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_f0266ffd-d541-461f-9326-b15c1708a3c7_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EARNINGS PER SHARE</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareTextBlock" xlink:to="lab_us-gaap_EarningsPerShareTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember_b61fe228-ace1-4ebc-b110-a85d8c10da5c_terseLabel_en-US" xlink:label="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Datix Bidco Limited and RL Datix Holdings (USA), Inc</link:label>
    <link:label id="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember_label_en-US" xlink:label="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Datix Bidco Limited and RL Datix Holdings (USA), Inc [Member]</link:label>
    <link:label id="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember_documentation_en-US" xlink:label="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Datix Bidco Limited and RL Datix Holdings (USA), Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember" xlink:href="arcc-20241231.xsd#arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember" xlink:to="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember_3f0f80be-495b-4d52-b976-b45b44f099ae_terseLabel_en-US" xlink:label="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Anaqua Parent Holdings, Inc. &amp; Astorg VII Co-Invest Anaqua</link:label>
    <link:label id="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember_label_en-US" xlink:label="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Anaqua Parent Holdings, Inc. &amp; Astorg VII Co-Invest Anaqua [Member]</link:label>
    <link:label id="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember_documentation_en-US" xlink:label="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Anaqua Parent Holdings, Inc. &amp; Astorg VII Co-Invest Anaqua</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember" xlink:href="arcc-20241231.xsd#arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember" xlink:to="lab_arcc_AnaquaParentHoldingsIncAstorgVIICoInvestAnaquaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventMember_4ad0ae3d-dc36-455b-8003-53ac422fc1b1_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember" xlink:to="lab_us-gaap_SubsequentEventMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevolvingLoanCommitmentsMember_e956402f-fea8-4dc5-ac53-bbf6b54c0021_terseLabel_en-US" xlink:label="lab_arcc_RevolvingLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving loan commitments</link:label>
    <link:label id="lab_arcc_RevolvingLoanCommitmentsMember_label_en-US" xlink:label="lab_arcc_RevolvingLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Loan Commitments [Member]</link:label>
    <link:label id="lab_arcc_RevolvingLoanCommitmentsMember_documentation_en-US" xlink:label="lab_arcc_RevolvingLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving Loan Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevolvingLoanCommitmentsMember" xlink:href="arcc-20241231.xsd#arcc_RevolvingLoanCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevolvingLoanCommitmentsMember" xlink:to="lab_arcc_RevolvingLoanCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_c4c3973a-e5dc-43f3-9303-542909a77169_terseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expenses</link:label>
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_label_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpensesAbstract" xlink:to="lab_us-gaap_CostsAndExpensesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OtherSectorMember_dc8e2a6c-6155-460e-b8e2-7be40fcb57d9_terseLabel_en-US" xlink:label="lab_arcc_OtherSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_arcc_OtherSectorMember_label_en-US" xlink:label="lab_arcc_OtherSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Sector [Member]</link:label>
    <link:label id="lab_arcc_OtherSectorMember_documentation_en-US" xlink:label="lab_arcc_OtherSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OtherSectorMember" xlink:href="arcc-20241231.xsd#arcc_OtherSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OtherSectorMember" xlink:to="lab_arcc_OtherSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare_696e4bb4-4e32-47d9-976a-27716731bcb7_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ordinary income (in dollars per share)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare_label_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution, Ordinary Income, Per Share</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution, Ordinary Income, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare" xlink:to="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MajescoAndMagicTopcoLPMember_d5691328-a142-4da9-a84a-056a5cc86166_terseLabel_en-US" xlink:label="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Majesco and Magic Topco, L.P.</link:label>
    <link:label id="lab_arcc_MajescoAndMagicTopcoLPMember_label_en-US" xlink:label="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Majesco and Magic Topco, L.P. [Member]</link:label>
    <link:label id="lab_arcc_MajescoAndMagicTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Majesco and Magic Topco, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MajescoAndMagicTopcoLPMember" xlink:href="arcc-20241231.xsd#arcc_MajescoAndMagicTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MajescoAndMagicTopcoLPMember" xlink:to="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_049a907a-6b15-47cd-a808-9bd781a40e2c_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxPolicyTextBlock" xlink:to="lab_us-gaap_IncomeTaxPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember_label_en-US" xlink:label="lab_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Investments In Illiquid Equity Securities [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Investments In Illiquid Equity Securities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember" xlink:to="lab_arcc_RiskOfInvestmentsInIlliquidEquitySecuritiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeerGroupIssuersFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_PeerGroupIssuersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Peer Group Issuers, Footnote</link:label>
    <link:label id="lab_ecd_PeerGroupIssuersFnTextBlock_label_en-US" xlink:label="lab_ecd_PeerGroupIssuersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Peer Group Issuers, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeerGroupIssuersFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PeerGroupIssuersFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeerGroupIssuersFnTextBlock" xlink:to="lab_ecd_PeerGroupIssuersFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherIncome_79ba7827-cf1a-4f7f-8a90-e1161f13c511_terseLabel_en-US" xlink:label="lab_us-gaap_OtherIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other income</link:label>
    <link:label id="lab_us-gaap_OtherIncome_0d2322e0-3216-41b8-be21-7b4698b673e9_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Management fees and other income</link:label>
    <link:label id="lab_us-gaap_OtherIncome_label_en-US" xlink:label="lab_us-gaap_OtherIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherIncome" xlink:to="lab_us-gaap_OtherIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentDomain_15fcec9c-1d8c-4f82-a38a-2387b2ef4a20_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_label_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain" xlink:to="lab_us-gaap_SegmentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendIncomeOperating_55dd6acf-6acc-4fb4-887e-57a416deaf98_terseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend income</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperating_83ccb34e-a82a-4dff-a30a-79cec10a71b6_verboseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividend income</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperating_label_en-US" xlink:label="lab_us-gaap_DividendIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeOperating" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendIncomeOperating"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendIncomeOperating" xlink:to="lab_us-gaap_DividendIncomeOperating" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_InvestmentOwnedAtFairValueYield_label_en-US" xlink:label="lab_arcc_InvestmentOwnedAtFairValueYield" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, at Fair Value, Yield</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtFairValueYield_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedAtFairValueYield" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, at Fair Value, Yield</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation_14e4b277-f0bf-47c7-baec-4941a124d9a4_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized appreciation (depreciation) on investments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distributable Earnings (Loss), Accumulated Appreciation (Depreciation)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation"/>
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    <link:label id="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis_096c6b89-a33f-43ac-b0d2-2e314e094ed1_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Support to Nonconsolidated Legal Entity [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis_label_en-US" xlink:label="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Support to Nonconsolidated Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:to="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember_a8ef1f4e-cafa-4707-b8a5-aaccd880692a_terseLabel_en-US" xlink:label="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SM Wellness Holdings, Inc. and SM Holdco, Inc.</link:label>
    <link:label id="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember_label_en-US" xlink:label="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SM Wellness Holdings, Inc. and SM Holdco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember_documentation_en-US" xlink:label="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SM Wellness Holdings, Inc. and SM Holdco, Inc.</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember" xlink:to="lab_arcc_SMWellnessHoldingsIncAndSMHoldcoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_84f52d3f-11bf-40ba-a01f-85f58d5ed2c5_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FINANCIAL HIGHLIGHTS</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:to="lab_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember_d64f919a-9303-4c77-b106-1d9e6f1dff88_terseLabel_en-US" xlink:label="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Unrealized Gain (Loss)</link:label>
    <link:label id="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember_label_en-US" xlink:label="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt And Equity Securities, Unrealized Gain (Loss) [Member]</link:label>
    <link:label id="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember_documentation_en-US" xlink:label="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt And Equity Securities, Unrealized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember" xlink:href="arcc-20241231.xsd#arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember" xlink:to="lab_arcc_DebtAndEquitySecuritiesUnrealizedGainLossMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoMember_terseLabel_en-US" xlink:label="lab_ecd_PeoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO</link:label>
    <link:label id="lab_ecd_PeoMember_label_en-US" xlink:label="lab_ecd_PeoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PeoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoMember" xlink:to="lab_ecd_PeoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee_689566f2-72e7-4f63-b5a6-7be9eb9fd6e2_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of operating expenses to average net assets</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Expense Ratio, after Fee Waiver and Incentive Fee Deduction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:to="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_c9d91b84-cf6a-4dc5-a1b9-824a0513c74c_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Four</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Four [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentRedemptionPeriodFourMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DividendIncomeOperatingExcludingPaidInKind_bd3af653-b261-4724-8200-896bc66a7312_terseLabel_en-US" xlink:label="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend income</link:label>
    <link:label id="lab_arcc_DividendIncomeOperatingExcludingPaidInKind_label_en-US" xlink:label="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating, Excluding Paid-In-Kind</link:label>
    <link:label id="lab_arcc_DividendIncomeOperatingExcludingPaidInKind_documentation_en-US" xlink:label="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating, Excluding Paid-In-Kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:href="arcc-20241231.xsd#arcc_DividendIncomeOperatingExcludingPaidInKind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:to="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease_42e94749-3fe3-4e38-9193-d308b35f6848_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances of common stock (in dollars per share)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease_label_en-US" xlink:label="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Share Issuance, Per Share, Increase (Decrease)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Share Issuance, Per Share, Increase (Decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease" xlink:to="lab_arcc_InvestmentCompanyShareIssuancePerShareIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrIndName_terseLabel_en-US" xlink:label="lab_ecd_TrdArrIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_TrdArrIndName_label_en-US" xlink:label="lab_ecd_TrdArrIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndName" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TrdArrIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrIndName" xlink:to="lab_ecd_TrdArrIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_April2036CLOSecuredNotesMember_6d95aca8-00ae-4ebb-8759-6ab4f659ec09_terseLabel_en-US" xlink:label="lab_arcc_April2036CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">April 2036 CLO Notes</link:label>
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    <link:label id="lab_arcc_April2036CLOSecuredNotesMember_documentation_en-US" xlink:label="lab_arcc_April2036CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">April 2036 CLO Secured Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_April2036CLOSecuredNotesMember" xlink:href="arcc-20241231.xsd#arcc_April2036CLOSecuredNotesMember"/>
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    <link:label id="lab_us-gaap_InsuranceSectorMember_a7abad43-b7dd-430f-935d-6f91a017e869_terseLabel_en-US" xlink:label="lab_us-gaap_InsuranceSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance</link:label>
    <link:label id="lab_us-gaap_InsuranceSectorMember_label_en-US" xlink:label="lab_us-gaap_InsuranceSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InsuranceSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InsuranceSectorMember" xlink:to="lab_us-gaap_InsuranceSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member_6865ae79-7069-468c-90a1-8aa53cb4e718_terseLabel_en-US" xlink:label="lab_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Centric Brands LLC, Centric Brands TopCo, LLC, and Centric Brands L.P.</link:label>
    <link:label id="lab_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member_label_en-US" xlink:label="lab_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Centric Brands LLC, Centric Brands TopCo, LLC, and Centric Brands L.P. [Member]</link:label>
    <link:label id="lab_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member_documentation_en-US" xlink:label="lab_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Centric Brands LLC, Centric Brands TopCo, LLC, and Centric Brands L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member" xlink:href="arcc-20241231.xsd#arcc_CentricBrandsLLCCentricBrandsTopCoLLCAndCentricBrandsL.P.Member"/>
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    <link:label id="lab_arcc_FaradayBuyerLLCMember_d3f2bf26-7d9b-4bc3-93a7-daf5953a7175_terseLabel_en-US" xlink:label="lab_arcc_FaradayBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Faraday Buyer, LLC</link:label>
    <link:label id="lab_arcc_FaradayBuyerLLCMember_label_en-US" xlink:label="lab_arcc_FaradayBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Faraday Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_FaradayBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_FaradayBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Faraday Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FaradayBuyerLLCMember" xlink:href="arcc-20241231.xsd#arcc_FaradayBuyerLLCMember"/>
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    <link:label id="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember_a461ee84-7b53-46cd-93dc-cf8be7c9cf4b_terseLabel_en-US" xlink:label="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NMN Holdings III Corp. and NMN Holdings LP</link:label>
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    <link:label id="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NMN Holdings III Corp. and NMN Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:to="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_ShermcoIntermediateHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ShermcoIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shermco Intermediate Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ShermcoIntermediateHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ShermcoIntermediateHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ShermcoIntermediateHoldingsIncMember" xlink:to="lab_arcc_ShermcoIntermediateHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember_1e5c43d0-c46d-462a-9c61-4acd03df97b8_terseLabel_en-US" xlink:label="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Triwizard Holdings, Inc. and Triwizard Parent, LP</link:label>
    <link:label id="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember_label_en-US" xlink:label="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Triwizard Holdings, Inc. and Triwizard Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember_documentation_en-US" xlink:label="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Triwizard Holdings, Inc. and Triwizard Parent, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:href="arcc-20241231.xsd#arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:to="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtErrCompAmt_terseLabel_en-US" xlink:label="lab_ecd_AggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Amount</link:label>
    <link:label id="lab_ecd_AggtErrCompAmt_label_en-US" xlink:label="lab_ecd_AggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AggtErrCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtErrCompAmt" xlink:to="lab_ecd_AggtErrCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member_5c2cd618-e914-4196-9e3e-f5f91fb8d9b7_terseLabel_en-US" xlink:label="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Opal Fuels Intermediate HoldCo LLC, and Opal Fuels Inc.</link:label>
    <link:label id="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member_label_en-US" xlink:label="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Opal Fuels Intermediate HoldCo LLC, and Opal Fuels Inc. [Member]</link:label>
    <link:label id="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member_documentation_en-US" xlink:label="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Opal Fuels Intermediate HoldCo LLC, and Opal Fuels Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:href="arcc-20241231.xsd#arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:to="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2023M4DividendsMember_edeea156-a3c3-42d7-b125-bf2c05b6647d_terseLabel_en-US" xlink:label="lab_arcc_O2023M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">April 25, 2023</link:label>
    <link:label id="lab_arcc_O2023M4DividendsMember_label_en-US" xlink:label="lab_arcc_O2023M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2023 M4 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2023M4DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2023M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, April Twenty Fifth Two Thousand Twenty Three O 2023 M4 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2023M4DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2023M4DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2023M4DividendsMember" xlink:to="lab_arcc_O2023M4DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_e1c64dca-60b9-4197-8671-874951bdcb86_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember_032ea77b-ce14-41a5-8322-31b00fd1c77e_terseLabel_en-US" xlink:label="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp</link:label>
    <link:label id="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember_label_en-US" xlink:label="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp [Member]</link:label>
    <link:label id="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember_documentation_en-US" xlink:label="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:href="arcc-20241231.xsd#arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:to="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember_e5bdc556-b3f4-4f8b-ba53-f8d8ed57dd30_terseLabel_en-US" xlink:label="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC</link:label>
    <link:label id="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember_label_en-US" xlink:label="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember_documentation_en-US" xlink:label="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:href="arcc-20241231.xsd#arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:to="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_3fe7b5d5-f6cb-4705-9c54-4c488a08f376_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax expense, including excise tax</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income, Operating, Tax Expense (Benefit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:to="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtErrCompNotYetDeterminedTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Not Yet Determined</link:label>
    <link:label id="lab_ecd_AggtErrCompNotYetDeterminedTextBlock_label_en-US" xlink:label="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Not Yet Determined [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AggtErrCompNotYetDeterminedTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:to="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters_0321bbc0-e717-44f9-8e84-4d261fb920d3_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of quarters considered in base management fee calculation</link:label>
    <link:label id="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters_label_en-US" xlink:label="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Base Management Fee Calculation, Number Of Quarters</link:label>
    <link:label id="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Base Management Fee Calculation, Number Of Quarters</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:to="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentInterestRate_e0375680-5ea2-4b90-ab53-473948e82dc8_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coupon</link:label>
    <link:label id="lab_us-gaap_InvestmentInterestRate_label_en-US" xlink:label="lab_us-gaap_InvestmentInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentInterestRate" xlink:to="lab_us-gaap_InvestmentInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember_23686058-4e8f-4a17-82cb-499b611df4b2_terseLabel_en-US" xlink:label="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OakBridge Insurance Agency LLC and Maple Acquisition Holdings, LP</link:label>
    <link:label id="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember_label_en-US" xlink:label="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OakBridge Insurance Agency LLC and Maple Acquisition Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OakBridge Insurance Agency LLC and Maple Acquisition Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:to="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UKGIncAndHFUnitePartnersLPMember_c326f9d2-1f30-4ba7-9b2a-622eb85c67c3_terseLabel_en-US" xlink:label="lab_arcc_UKGIncAndHFUnitePartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UKG Inc. and H&amp;F Unite Partners, L.P.</link:label>
    <link:label id="lab_arcc_UKGIncAndHFUnitePartnersLPMember_label_en-US" xlink:label="lab_arcc_UKGIncAndHFUnitePartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UKG Inc. and H&amp;F Unite Partners, L.P. [Member]</link:label>
    <link:label id="lab_arcc_UKGIncAndHFUnitePartnersLPMember_documentation_en-US" xlink:label="lab_arcc_UKGIncAndHFUnitePartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">UKG Inc. and H&amp;F Unite Partners, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UKGIncAndHFUnitePartnersLPMember" xlink:href="arcc-20241231.xsd#arcc_UKGIncAndHFUnitePartnersLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UKGIncAndHFUnitePartnersLPMember" xlink:to="lab_arcc_UKGIncAndHFUnitePartnersLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SFEIntermediateHoldcoLLCMember_3fa363de-abb8-4f78-9d37-d4e841145ed9_terseLabel_en-US" xlink:label="lab_arcc_SFEIntermediateHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SFE Intermediate Holdco LLC</link:label>
    <link:label id="lab_arcc_SFEIntermediateHoldcoLLCMember_label_en-US" xlink:label="lab_arcc_SFEIntermediateHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SFE Intermediate Holdco LLC [Member]</link:label>
    <link:label id="lab_arcc_SFEIntermediateHoldcoLLCMember_documentation_en-US" xlink:label="lab_arcc_SFEIntermediateHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SFE Intermediate Holdco LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SFEIntermediateHoldcoLLCMember" xlink:href="arcc-20241231.xsd#arcc_SFEIntermediateHoldcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SFEIntermediateHoldcoLLCMember" xlink:to="lab_arcc_SFEIntermediateHoldcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_July2029NotesMember_4a2fce21-cb13-4418-ac1f-19e02815beb0_terseLabel_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2029 Notes</link:label>
    <link:label id="lab_arcc_July2029NotesMember_95ed28d1-571d-443b-9869-cefa417b9d30_verboseLabel_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">July 2029 Notes (principal amount outstanding of $850 and $0, respectively)</link:label>
    <link:label id="lab_arcc_July2029NotesMember_label_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2029 Notes [Member]</link:label>
    <link:label id="lab_arcc_July2029NotesMember_documentation_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2029 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2029NotesMember" xlink:href="arcc-20241231.xsd#arcc_July2029NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_July2029NotesMember" xlink:to="lab_arcc_July2029NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PelicanProductsIncMember_30f743a9-c3a6-4ad2-b6ac-bd3efcfef89b_terseLabel_en-US" xlink:label="lab_arcc_PelicanProductsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pelican Products, Inc.</link:label>
    <link:label id="lab_arcc_PelicanProductsIncMember_label_en-US" xlink:label="lab_arcc_PelicanProductsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pelican Products, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PelicanProductsIncMember_documentation_en-US" xlink:label="lab_arcc_PelicanProductsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pelican Products, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PelicanProductsIncMember" xlink:href="arcc-20241231.xsd#arcc_PelicanProductsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PelicanProductsIncMember" xlink:to="lab_arcc_PelicanProductsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare_2e782a2f-c683-4145-820a-8d14b0ddeed8_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conversion of 2024 Convertible Notes (in dollars per share)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare_label_en-US" xlink:label="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Issuance Of Convertible Notes, Per Share</link:label>
    <link:label id="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Issuance Of Convertible Notes, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare" xlink:to="lab_arcc_InvestmentCompanyIssuanceOfConvertibleNotesPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember_label_en-US" xlink:label="lab_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Operating In A Highly Competitive Market [Member]</link:label>
    <link:label id="lab_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember_documentation_en-US" xlink:label="lab_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Operating In A Highly Competitive Market</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember" xlink:to="lab_arcc_RiskOfOperatingInAHighlyCompetitiveMarketMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther_70bc12ef-ac72-41ab-8689-cd4dcbcd1858_terseLabel_en-US" xlink:label="lab_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment for interest expense on 2014 Convertible Notes</link:label>
    <link:label id="lab_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther_label_en-US" xlink:label="lab_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther" xlink:to="lab_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_cfe0b28d-b135-4a72-90b2-84e01c1b48f9_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember_ed484a44-0680-4204-a812-0e4015921041_terseLabel_en-US" xlink:label="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Registrar Intermediate, LLC and PSP Registrar Co-Investment Fund, L.P.</link:label>
    <link:label id="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember_label_en-US" xlink:label="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Registrar Intermediate, LLC and PSP Registrar Co-Investment Fund, L.P. [Member]</link:label>
    <link:label id="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember_documentation_en-US" xlink:label="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Registrar Intermediate, LLC and PSP Registrar Co-Investment Fund, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember" xlink:href="arcc-20241231.xsd#arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember" xlink:to="lab_arcc_RegistrarIntermediateLLCAndPSPRegistrarCoInvestmentFundLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_June2024NotesMember_7494c92b-40b1-4263-9f20-f895279daf9a_terseLabel_en-US" xlink:label="lab_arcc_June2024NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">June 2024 Notes</link:label>
    <link:label id="lab_arcc_June2024NotesMember_6e6f0fb2-53f7-4e28-b2a4-5c23c96a0bfa_verboseLabel_en-US" xlink:label="lab_arcc_June2024NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">June 2024 Notes (principal amount outstanding of $0 and $900, respectively)</link:label>
    <link:label id="lab_arcc_June2024NotesMember_label_en-US" xlink:label="lab_arcc_June2024NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">June 2024 Notes [Member]</link:label>
    <link:label id="lab_arcc_June2024NotesMember_documentation_en-US" xlink:label="lab_arcc_June2024NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">June 2024 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_June2024NotesMember" xlink:href="arcc-20241231.xsd#arcc_June2024NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_June2024NotesMember" xlink:to="lab_arcc_June2024NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoTotalCompAmt_terseLabel_en-US" xlink:label="lab_ecd_PeoTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Total Compensation Amount</link:label>
    <link:label id="lab_ecd_PeoTotalCompAmt_label_en-US" xlink:label="lab_ecd_PeoTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Total Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PeoTotalCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoTotalCompAmt" xlink:to="lab_ecd_PeoTotalCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorNotes_78b34880-d787-441b-86ab-6c617e6b1181_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior notes</link:label>
    <link:label id="lab_us-gaap_SeniorNotes_label_en-US" xlink:label="lab_us-gaap_SeniorNotes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotes" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SeniorNotes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorNotes" xlink:to="lab_us-gaap_SeniorNotes" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_38a1b3ed-2b3f-4fe2-b0e5-ba51f05ce046_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gross Amount of Recognized Liabilities</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_177214d3-ca50-42d6-8401-e36a4ab7825c_negatedLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Gross Amount of Recognized Liabilities</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Subject to Master Netting Arrangement, before Offset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SMBCFundingFacilityMember_c6c00a90-bd1e-4aef-80c9-bfff9027fd07_terseLabel_en-US" xlink:label="lab_arcc_SMBCFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SMBC Funding Facility</link:label>
    <link:label id="lab_arcc_SMBCFundingFacilityMember_label_en-US" xlink:label="lab_arcc_SMBCFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SMBC Funding Facility [Member]</link:label>
    <link:label id="lab_arcc_SMBCFundingFacilityMember_documentation_en-US" xlink:label="lab_arcc_SMBCFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SMBC Funding Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SMBCFundingFacilityMember" xlink:href="arcc-20241231.xsd#arcc_SMBCFundingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SMBCFundingFacilityMember" xlink:to="lab_arcc_SMBCFundingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfFailureToMaintainStatusAsABDCMember_label_en-US" xlink:label="lab_arcc_RiskOfFailureToMaintainStatusAsABDCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Failure To Maintain Status As A BDC [Member]</link:label>
    <link:label id="lab_arcc_RiskOfFailureToMaintainStatusAsABDCMember_documentation_en-US" xlink:label="lab_arcc_RiskOfFailureToMaintainStatusAsABDCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Failure To Maintain Status As A BDC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfFailureToMaintainStatusAsABDCMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfFailureToMaintainStatusAsABDCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfFailureToMaintainStatusAsABDCMember" xlink:to="lab_arcc_RiskOfFailureToMaintainStatusAsABDCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember_66df5f58-1ed1-4568-a5d9-5bfd2c8a9e9b_terseLabel_en-US" xlink:label="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accession Risk Management Group, Inc. and RSC Insurance Brokerage, Inc.</link:label>
    <link:label id="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember_label_en-US" xlink:label="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accession Risk Management Group, Inc. and RSC Insurance Brokerage, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember_documentation_en-US" xlink:label="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accession Risk Management Group, Inc. and RSC Insurance Brokerage, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember" xlink:href="arcc-20241231.xsd#arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember" xlink:to="lab_arcc_AccessionRiskManagementGroupIncAndRSCInsuranceBrokerageIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_671419cc-21fd-4a11-8ce4-e716e7acd350_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Income Location, Balance [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationAxis" xlink:to="lab_us-gaap_IncomeStatementLocationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureAbstract" xlink:to="lab_us-gaap_DebtDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FoundationConsumerBrandsLLCMember_6865ea8a-212d-4119-8692-06c96d5a9f5d_terseLabel_en-US" xlink:label="lab_arcc_FoundationConsumerBrandsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foundation Consumer Brands, LLC</link:label>
    <link:label id="lab_arcc_FoundationConsumerBrandsLLCMember_label_en-US" xlink:label="lab_arcc_FoundationConsumerBrandsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foundation Consumer Brands, LLC [Member]</link:label>
    <link:label id="lab_arcc_FoundationConsumerBrandsLLCMember_documentation_en-US" xlink:label="lab_arcc_FoundationConsumerBrandsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foundation Consumer Brands, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FoundationConsumerBrandsLLCMember" xlink:href="arcc-20241231.xsd#arcc_FoundationConsumerBrandsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FoundationConsumerBrandsLLCMember" xlink:to="lab_arcc_FoundationConsumerBrandsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockMember_dbc12220-d8bf-4bd7-a2fd-f293c3b31a9e_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_label_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember" xlink:to="lab_us-gaap_CommonStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD2Member_d251155f-eece-4b5b-adf3-40ca91267ba1_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 2</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD2Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 2 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD2Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:href="arcc-20241231.xsd#arcc_ForeignCurrencyForwardContractCAD2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Expense of Enforcement, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Expense of Enforcement, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:to="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_October2036ClassBCLOLoansMember_091707d1-0e7f-4bc3-b084-1f15308735a3_terseLabel_en-US" xlink:label="lab_arcc_October2036ClassBCLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 2036 Class B CLO Loans</link:label>
    <link:label id="lab_arcc_October2036ClassBCLOLoansMember_label_en-US" xlink:label="lab_arcc_October2036ClassBCLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">October 2036 Class B CLO Loans [Member]</link:label>
    <link:label id="lab_arcc_October2036ClassBCLOLoansMember_documentation_en-US" xlink:label="lab_arcc_October2036ClassBCLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 Class B CLO Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_October2036ClassBCLOLoansMember" xlink:href="arcc-20241231.xsd#arcc_October2036ClassBCLOLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_October2036ClassBCLOLoansMember" xlink:to="lab_arcc_October2036ClassBCLOLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_477081cb-15da-43aa-bee6-3b01453f93e6_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditMember_20c24c3a-6399-4184-a9eb-a5889a7c27d1_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember" xlink:to="lab_us-gaap_LineOfCreditMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SoutheastRegionMember_51ab1603-204a-40a4-bfa7-78e63ae363ef_terseLabel_en-US" xlink:label="lab_us-gaap_SoutheastRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Southeast</link:label>
    <link:label id="lab_us-gaap_SoutheastRegionMember_label_en-US" xlink:label="lab_us-gaap_SoutheastRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Southeast Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoutheastRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SoutheastRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SoutheastRegionMember" xlink:to="lab_us-gaap_SoutheastRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FlyWheelAcquirecoIncMember_14cf4151-c509-4614-a159-587b8e586463_terseLabel_en-US" xlink:label="lab_arcc_FlyWheelAcquirecoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FlyWheel Acquireco, Inc.</link:label>
    <link:label id="lab_arcc_FlyWheelAcquirecoIncMember_label_en-US" xlink:label="lab_arcc_FlyWheelAcquirecoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FlyWheel Acquireco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_FlyWheelAcquirecoIncMember_documentation_en-US" xlink:label="lab_arcc_FlyWheelAcquirecoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FlyWheel Acquireco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FlyWheelAcquirecoIncMember" xlink:href="arcc-20241231.xsd#arcc_FlyWheelAcquirecoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FlyWheelAcquirecoIncMember" xlink:to="lab_arcc_FlyWheelAcquirecoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput_2c674c3d-a5e9-4650-9bc3-602531d27d3c_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unobservable&#160;Input</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Investment Owned, Measurement Input</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:to="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_2324647c-0e5a-4325-8067-3f772ae77d11_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchases of investments</link:label>
    <link:label id="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_641ee45a-1be8-4a1b-ac41-e49a18ac8e1f_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases of investments</link:label>
    <link:label id="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_label_en-US" xlink:label="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Purchase, Investment, Operating Activity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:to="lab_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MembersEquity_40943407-f80f-43df-84a7-dacd30f65da1_totalLabel_en-US" xlink:label="lab_us-gaap_MembersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_us-gaap_MembersEquity_5ec9a004-3790-4795-9079-d4f8c5b26969_terseLabel_en-US" xlink:label="lab_us-gaap_MembersEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated certificates and members&#8217; capital</link:label>
    <link:label id="lab_us-gaap_MembersEquity_label_en-US" xlink:label="lab_us-gaap_MembersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Members' Equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MembersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MembersEquity" xlink:to="lab_us-gaap_MembersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RadwellParentLLCMember_b5fd2b35-e708-4cdf-ab6e-bdd201bf6a7d_terseLabel_en-US" xlink:label="lab_arcc_RadwellParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Radwell Parent, LLC</link:label>
    <link:label id="lab_arcc_RadwellParentLLCMember_label_en-US" xlink:label="lab_arcc_RadwellParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Radwell Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_RadwellParentLLCMember_documentation_en-US" xlink:label="lab_arcc_RadwellParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Radwell Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RadwellParentLLCMember" xlink:href="arcc-20241231.xsd#arcc_RadwellParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RadwellParentLLCMember" xlink:to="lab_arcc_RadwellParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MediumTermNotes_ddaa5346-19a0-45e6-9a2a-f236045f7ef2_terseLabel_en-US" xlink:label="lab_us-gaap_MediumTermNotes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intermediate funding notes</link:label>
    <link:label id="lab_us-gaap_MediumTermNotes_label_en-US" xlink:label="lab_us-gaap_MediumTermNotes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Medium-Term Note</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MediumTermNotes" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MediumTermNotes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MediumTermNotes" xlink:to="lab_us-gaap_MediumTermNotes" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingAbstract_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract" xlink:to="lab_us-gaap_SegmentReportingAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember_8d56c263-fca9-4b40-94d1-07f5710d5fc0_terseLabel_en-US" xlink:label="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P.</link:label>
    <link:label id="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember_label_en-US" xlink:label="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember_documentation_en-US" xlink:label="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:href="arcc-20241231.xsd#arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:to="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember_82bf155b-79fc-4551-a3fc-94fa1718f279_terseLabel_en-US" xlink:label="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Clarion Home Services Group, LLC and LBC Breeze Holdings LLC</link:label>
    <link:label id="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Clarion Home Services Group, LLC and LBC Breeze Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Clarion Home Services Group, LLC and LBC Breeze Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:to="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_070d1f3d-9909-4231-87e2-da577198e472_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EdmundsGovtechIncMember_5317006c-50cb-4f2e-8aaa-cf3e6c1a06f8_terseLabel_en-US" xlink:label="lab_arcc_EdmundsGovtechIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Edmunds Govtech, Inc</link:label>
    <link:label id="lab_arcc_EdmundsGovtechIncMember_label_en-US" xlink:label="lab_arcc_EdmundsGovtechIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Edmunds Govtech, Inc [Member]</link:label>
    <link:label id="lab_arcc_EdmundsGovtechIncMember_documentation_en-US" xlink:label="lab_arcc_EdmundsGovtechIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Edmunds Govtech, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EdmundsGovtechIncMember" xlink:href="arcc-20241231.xsd#arcc_EdmundsGovtechIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EdmundsGovtechIncMember" xlink:to="lab_arcc_EdmundsGovtechIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember_a27b8891-3122-4314-b6f3-edb20c7f3c0b_terseLabel_en-US" xlink:label="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North Star Acquisitionco, LLC and Toucan Bidco Limited</link:label>
    <link:label id="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember_label_en-US" xlink:label="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North Star Acquisitionco, LLC and Toucan Bidco Limited [Member]</link:label>
    <link:label id="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember_documentation_en-US" xlink:label="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North Star Acquisitionco, LLC and Toucan Bidco Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:href="arcc-20241231.xsd#arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:to="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember_dab6bd19-1118-4c54-90ee-65b10e57dcfb_terseLabel_en-US" xlink:label="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc.</link:label>
    <link:label id="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember_label_en-US" xlink:label="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember_documentation_en-US" xlink:label="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:href="arcc-20241231.xsd#arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:to="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities_98786879-315e-4dc3-9fa2-230f9049a748_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and other liabilities</link:label>
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    <link:label id="lab_arcc_O2023M7DividendsMember_0e47f644-a6a6-406d-9347-5d20ea5fad4e_terseLabel_en-US" xlink:label="lab_arcc_O2023M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 25, 2023</link:label>
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    <link:label id="lab_arcc_O2023M7DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2023M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, July Twenty Fifth Two Thousand Twenty Three O 2023 M7 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2023M7DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2023M7DividendsMember"/>
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    <link:label id="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember_1407cb1b-f797-4e5b-a2e1-28301fa48d6c_terseLabel_en-US" xlink:label="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Beacon Wellness Brands, Inc. and CDI Holdings I Corp.</link:label>
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    <link:label id="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember_documentation_en-US" xlink:label="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Beacon Wellness Brands, Inc. and CDI Holdings I Corp.</link:label>
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    <link:label id="lab_arcc_DividendsMember_label_en-US" xlink:label="lab_arcc_DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends [Member]</link:label>
    <link:label id="lab_arcc_DividendsMember_documentation_en-US" xlink:label="lab_arcc_DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DividendsMember" xlink:href="arcc-20241231.xsd#arcc_DividendsMember"/>
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    <link:label id="lab_us-gaap_InvestmentOwnedPercentOfNetAssets_8dc7b3b3-6552-44f5-ae0e-a803fd80ccfe_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">% of Net Assets</link:label>
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    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_WebPTIncMember_fb59368c-923d-4655-afe2-f907cbfb4fab_terseLabel_en-US" xlink:label="lab_arcc_WebPTIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WebPT, Inc.</link:label>
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    <link:label id="lab_arcc_RiskRelatedToLackOfLiquidityInInvestmentsMember_label_en-US" xlink:label="lab_arcc_RiskRelatedToLackOfLiquidityInInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Related To Lack Of Liquidity In Investments [Member]</link:label>
    <link:label id="lab_arcc_RiskRelatedToLackOfLiquidityInInvestmentsMember_documentation_en-US" xlink:label="lab_arcc_RiskRelatedToLackOfLiquidityInInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Related To Lack Of Liquidity In Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskRelatedToLackOfLiquidityInInvestmentsMember" xlink:href="arcc-20241231.xsd#arcc_RiskRelatedToLackOfLiquidityInInvestmentsMember"/>
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    <link:label id="lab_srt_ConsolidatedEntitiesAxis_cca56ec4-4186-41ec-9b89-e7fdf0a05e14_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesAxis_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesAxis" xlink:to="lab_srt_ConsolidatedEntitiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales_0a39463c-09ea-4418-9617-2599157658b4_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales (cost)</link:label>
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    <link:label id="lab_us-gaap_GeographicConcentrationRiskMember_c94fda8a-c092-4363-8055-3bbb0b781545_terseLabel_en-US" xlink:label="lab_us-gaap_GeographicConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographic Concentration Risk</link:label>
    <link:label id="lab_us-gaap_GeographicConcentrationRiskMember_label_en-US" xlink:label="lab_us-gaap_GeographicConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographic Concentration Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeographicConcentrationRiskMember" xlink:to="lab_us-gaap_GeographicConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_88395383-71e6-4e28-9c7b-9b1d35803bdc_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
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    <link:label id="lab_dei_AuditorLocation_32a4608a-9a6b-41c4-a8d3-a7637c31cffc_terseLabel_en-US" xlink:label="lab_dei_AuditorLocation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Auditor Location</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorLocation" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AuditorLocation"/>
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    <link:label id="lab_us-gaap_FinancialSupportForNonconsolidatedLegalEntityAbstract_0b4e3f24-f855-4f94-b9a7-ae2362b3330e_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialSupportForNonconsolidatedLegalEntityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Support for Nonconsolidated Legal Entity [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialSupportForNonconsolidatedLegalEntityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialSupportForNonconsolidatedLegalEntityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialSupportForNonconsolidatedLegalEntityAbstract" xlink:to="lab_us-gaap_FinancialSupportForNonconsolidatedLegalEntityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_UnfundedLoanCommitmentMember_8b9969a7-4511-4b92-89a8-cee7bdb4b94c_terseLabel_en-US" xlink:label="lab_us-gaap_UnfundedLoanCommitmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unfunded commitments</link:label>
    <link:label id="lab_us-gaap_UnfundedLoanCommitmentMember_label_en-US" xlink:label="lab_us-gaap_UnfundedLoanCommitmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unfunded Loan Commitment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnfundedLoanCommitmentMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnfundedLoanCommitmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnfundedLoanCommitmentMember" xlink:to="lab_us-gaap_UnfundedLoanCommitmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_cb9a6b5e-afbc-4d53-898d-88c89a96a75b_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Structuring Service Fees and Other Income</link:label>
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue [Policy Text Block]</link:label>
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    <link:label id="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock_label_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Not Adopted [Text Block]</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain_3b6e040f-7579-4720-9956-a54f49ba9d55_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Nonconsolidated Subsidiary [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_f4f29df6-872d-49a3-a6e3-449a30718bb5_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividend and Interest Income</link:label>
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    <link:label id="lab_us-gaap_PreferredStockMember_dee954fd-77bc-4909-aa02-7b64beb20afb_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred equity</link:label>
    <link:label id="lab_us-gaap_PreferredStockMember_label_en-US" xlink:label="lab_us-gaap_PreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PreferredStockMember"/>
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    <link:label id="lab_us-gaap_DividendsPayableTable_73075e80-adbe-4aec-89e8-bc03f589e077_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable [Table]</link:label>
    <link:label id="lab_us-gaap_DividendsPayableTable_label_en-US" xlink:label="lab_us-gaap_DividendsPayableTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsPayableTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableTable" xlink:to="lab_us-gaap_DividendsPayableTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_f146d942-b1a2-4dfb-b453-6d6d02f76d5d_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining amount available for borrowing under line of credit</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member_194ac155-2905-4608-b4e5-32fe4cb6e95b_terseLabel_en-US" xlink:label="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Quick Quack Car Wash Holdings, LLC and KKR Game Changer Co-Invest Feeder II L.P.</link:label>
    <link:label id="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member_label_en-US" xlink:label="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quick Quack Car Wash Holdings, LLC and KKR Game Changer Co-Invest Feeder II L.P. [Member]</link:label>
    <link:label id="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member_documentation_en-US" xlink:label="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Quick Quack Car Wash Holdings, LLC and KKR Game Changer Co-Invest Feeder II L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:href="arcc-20241231.xsd#arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:to="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProofpointIncMember_29b965e6-4954-4a2d-8437-30ea2c96d50d_terseLabel_en-US" xlink:label="lab_arcc_ProofpointIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proofpoint, Inc.</link:label>
    <link:label id="lab_arcc_ProofpointIncMember_label_en-US" xlink:label="lab_arcc_ProofpointIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proofpoint, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ProofpointIncMember_documentation_en-US" xlink:label="lab_arcc_ProofpointIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proofpoint, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProofpointIncMember" xlink:href="arcc-20241231.xsd#arcc_ProofpointIncMember"/>
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    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOK1Member_3c013e2f-8d2d-4a14-8b98-bc5af3e445f0_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOK1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOK1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOK1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOK1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOK1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractNOK1Member" xlink:href="arcc-20241231.xsd#arcc_ForeignCurrencyForwardContractNOK1Member"/>
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    <link:label id="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember_ffd51efd-5574-4e54-b695-12e3978e029b_terseLabel_en-US" xlink:label="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NAS, LLC and Nationwide Marketing Group, LLC</link:label>
    <link:label id="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember_label_en-US" xlink:label="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NAS, LLC and Nationwide Marketing Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NAS, LLC and Nationwide Marketing Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:href="arcc-20241231.xsd#arcc_NASLLCAndNationwideMarketingGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:to="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GasUtilitiesMember_e5fcec9d-6c04-4ba1-b5ab-027699fbda96_terseLabel_en-US" xlink:label="lab_arcc_GasUtilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gas Utilities</link:label>
    <link:label id="lab_arcc_GasUtilitiesMember_label_en-US" xlink:label="lab_arcc_GasUtilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gas Utilities [Member]</link:label>
    <link:label id="lab_arcc_GasUtilitiesMember_documentation_en-US" xlink:label="lab_arcc_GasUtilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gas Utilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GasUtilitiesMember" xlink:href="arcc-20241231.xsd#arcc_GasUtilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GasUtilitiesMember" xlink:to="lab_arcc_GasUtilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfDebtInvestmentsMember_label_en-US" xlink:label="lab_arcc_RiskOfDebtInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Debt Investments [Member]</link:label>
    <link:label id="lab_arcc_RiskOfDebtInvestmentsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfDebtInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Debt Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfDebtInvestmentsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfDebtInvestmentsMember"/>
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    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_6b00454f-ce3e-4aaa-b74d-bfe5b9ca3264_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Significant Unobservable Inputs</link:label>
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    <link:label id="lab_arcc_IQNHoldingCorp.Member_49baef5b-3337-4769-9614-ba99e18719df_terseLabel_en-US" xlink:label="lab_arcc_IQNHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IQN Holding Corp.</link:label>
    <link:label id="lab_arcc_IQNHoldingCorp.Member_label_en-US" xlink:label="lab_arcc_IQNHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IQN Holding Corp. [Member]</link:label>
    <link:label id="lab_arcc_IQNHoldingCorp.Member_documentation_en-US" xlink:label="lab_arcc_IQNHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IQN Holding Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IQNHoldingCorp.Member" xlink:href="arcc-20241231.xsd#arcc_IQNHoldingCorp.Member"/>
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    <link:label id="lab_arcc_O2022M21DividendsMember_55b72b75-6b9d-4560-a314-faf647563679_terseLabel_en-US" xlink:label="lab_arcc_O2022M21DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 9, 2022</link:label>
    <link:label id="lab_arcc_O2022M21DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M21DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M2 1 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M21DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M21DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, February Ninth Two Thousand Twenty Two Member, Dividend One O 2022 M2 Dividends 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022M21DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022M21DividendsMember"/>
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    <link:label id="lab_arcc_PowerGenerationMember_57e52351-1d06-4bb6-9276-c315799fe8ad_terseLabel_en-US" xlink:label="lab_arcc_PowerGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Power Generation</link:label>
    <link:label id="lab_arcc_PowerGenerationMember_label_en-US" xlink:label="lab_arcc_PowerGenerationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Power Generation [Member]</link:label>
    <link:label id="lab_arcc_PowerGenerationMember_documentation_en-US" xlink:label="lab_arcc_PowerGenerationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Power Generation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PowerGenerationMember" xlink:href="arcc-20241231.xsd#arcc_PowerGenerationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PowerGenerationMember" xlink:to="lab_arcc_PowerGenerationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_8b79b678-8b4b-4aa4-87c4-99dad7c31b3a_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis" xlink:to="lab_us-gaap_SubsequentEventTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member_74a3e94a-b3b0-4d2d-9ea1-23283786a711_terseLabel_en-US" xlink:label="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WebPT, Inc. and WPT Intermediate Holdco, Inc.</link:label>
    <link:label id="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member_label_en-US" xlink:label="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WebPT, Inc. and WPT Intermediate Holdco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member_documentation_en-US" xlink:label="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WebPT, Inc. and WPT Intermediate Holdco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:href="arcc-20241231.xsd#arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:to="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ExtraHopNetworksIncMember_5bd28638-6d99-46a8-a82d-e5b6fbc1fe2d_terseLabel_en-US" xlink:label="lab_arcc_ExtraHopNetworksIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ExtraHop Networks, Inc.</link:label>
    <link:label id="lab_arcc_ExtraHopNetworksIncMember_label_en-US" xlink:label="lab_arcc_ExtraHopNetworksIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ExtraHop Networks, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ExtraHopNetworksIncMember_documentation_en-US" xlink:label="lab_arcc_ExtraHopNetworksIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ExtraHop Networks, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExtraHopNetworksIncMember" xlink:href="arcc-20241231.xsd#arcc_ExtraHopNetworksIncMember"/>
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    <link:label id="lab_us-gaap_EarningsPerShareAbstract_aed159e3-a1b3-4f7f-ba1f-f3a42ca3509b_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NET INCOME PER COMMON SHARE</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
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    <link:label id="lab_us-gaap_EquityAbstract_5f901621-6267-451e-a058-51a7e0f644c4_terseLabel_en-US" xlink:label="lab_us-gaap_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_us-gaap_EquityAbstract_label_en-US" xlink:label="lab_us-gaap_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityAbstract"/>
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    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_3223e2e2-bf40-4bef-979a-2a26af04d8df_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset coverage requirement applicable to senior securities</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:to="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember_780ca59c-757a-46b4-acd8-668629254d65_terseLabel_en-US" xlink:label="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redwood Services, LLC and Redwood Services Holdco, LLC</link:label>
    <link:label id="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember_label_en-US" xlink:label="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redwood Services, LLC and Redwood Services Holdco, LLC [Member]</link:label>
    <link:label id="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember_documentation_en-US" xlink:label="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Redwood Services, LLC and Redwood Services Holdco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember" xlink:href="arcc-20241231.xsd#arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember" xlink:to="lab_arcc_RedwoodServicesLLCAndRedwoodServicesHoldcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember_e1e87c68-6d7a-4b96-8703-964b1101b06e_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Quarterly Hurdle Rate</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Hurdle Rate [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Hurdle Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:href="arcc-20241231.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember_eb2246af-4c02-4140-9e93-46a58ca1078e_terseLabel_en-US" xlink:label="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Steward Partners Global Advisory, LLC and Steward Partners Investment Advisory, LLC</link:label>
    <link:label id="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember_label_en-US" xlink:label="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Steward Partners Global Advisory, LLC and Steward Partners Investment Advisory, LLC [Member]</link:label>
    <link:label id="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember_documentation_en-US" xlink:label="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Steward Partners Global Advisory, LLC and Steward Partners Investment Advisory, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember" xlink:href="arcc-20241231.xsd#arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember" xlink:to="lab_arcc_StewardPartnersGlobalAdvisoryLLCAndStewardPartnersInvestmentAdvisoryLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_1fd4c425-aabb-45d3-8540-87c1a090c218_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:to="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PaymentsOfCapitalGainsIncentiveFees_36c0486b-1b24-49e8-9549-a5eca77c5d5f_terseLabel_en-US" xlink:label="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments of capital gains incentive fees</link:label>
    <link:label id="lab_arcc_PaymentsOfCapitalGainsIncentiveFees_label_en-US" xlink:label="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments Of Capital Gains Incentive Fees</link:label>
    <link:label id="lab_arcc_PaymentsOfCapitalGainsIncentiveFees_documentation_en-US" xlink:label="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payments Of Capital Gains Incentive Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:href="arcc-20241231.xsd#arcc_PaymentsOfCapitalGainsIncentiveFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:to="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TritonWaterHoldingsIncMember_d8bb1f3f-a920-427d-bb27-9594246c4b07_terseLabel_en-US" xlink:label="lab_arcc_TritonWaterHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Triton Water Holdings, Inc.</link:label>
    <link:label id="lab_arcc_TritonWaterHoldingsIncMember_label_en-US" xlink:label="lab_arcc_TritonWaterHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Triton Water Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_TritonWaterHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_TritonWaterHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Triton Water Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TritonWaterHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_TritonWaterHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TritonWaterHoldingsIncMember" xlink:to="lab_arcc_TritonWaterHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RialtoManagementGroupLLCMember_968d2c43-6dc6-4115-9c6e-7b65e177d4f6_terseLabel_en-US" xlink:label="lab_arcc_RialtoManagementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rialto Management Group, LLC</link:label>
    <link:label id="lab_arcc_RialtoManagementGroupLLCMember_label_en-US" xlink:label="lab_arcc_RialtoManagementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rialto Management Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_RialtoManagementGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_RialtoManagementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rialto Management Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RialtoManagementGroupLLCMember" xlink:href="arcc-20241231.xsd#arcc_RialtoManagementGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RialtoManagementGroupLLCMember" xlink:to="lab_arcc_RialtoManagementGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrSecuritiesAggAvailAmt_terseLabel_en-US" xlink:label="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Available</link:label>
    <link:label id="lab_ecd_TrdArrSecuritiesAggAvailAmt_label_en-US" xlink:label="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Securities Aggregate Available Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TrdArrSecuritiesAggAvailAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:to="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2022M10DividendsMember_a4ec8e2d-a888-4824-8695-ad7f45d92c03_terseLabel_en-US" xlink:label="lab_arcc_O2022M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 25, 2022</link:label>
    <link:label id="lab_arcc_O2022M10DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M10 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M10DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, October Twenty Fifth Two Thousand Twenty Two O 2022 M10 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022M10DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022M10DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2022M10DividendsMember" xlink:to="lab_arcc_O2022M10DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjsMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjsMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_EqtyAwrdsAdjsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjsMember" xlink:to="lab_ecd_EqtyAwrdsAdjsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2022M7DividendsMember_306c5d4c-974e-4f67-b3f8-4a67d2d66866_terseLabel_en-US" xlink:label="lab_arcc_O2022M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 26, 2022</link:label>
    <link:label id="lab_arcc_O2022M7DividendsMember_label_en-US" xlink:label="lab_arcc_O2022M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 M7 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022M7DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, July Twenty Sixth Two Thousand Twenty Two Member O 2022 M7 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022M7DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022M7DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2022M7DividendsMember" xlink:to="lab_arcc_O2022M7DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WealthEnhancementGroupLLCMember_7cd755a7-f312-44b4-9395-a2ea586718c8_terseLabel_en-US" xlink:label="lab_arcc_WealthEnhancementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wealth Enhancement Group, LLC</link:label>
    <link:label id="lab_arcc_WealthEnhancementGroupLLCMember_label_en-US" xlink:label="lab_arcc_WealthEnhancementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wealth Enhancement Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_WealthEnhancementGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_WealthEnhancementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wealth Enhancement Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WealthEnhancementGroupLLCMember" xlink:href="arcc-20241231.xsd#arcc_WealthEnhancementGroupLLCMember"/>
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    <link:label id="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember_f3151bb1-210d-42bd-8a3e-43d9c7501545_terseLabel_en-US" xlink:label="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP</link:label>
    <link:label id="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember_label_en-US" xlink:label="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP [Member]</link:label>
    <link:label id="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember_documentation_en-US" xlink:label="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:href="arcc-20241231.xsd#arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:to="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardUndrlygSecuritiesAmt_terseLabel_en-US" xlink:label="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underlying Securities</link:label>
    <link:label id="lab_ecd_AwardUndrlygSecuritiesAmt_label_en-US" xlink:label="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Underlying Securities Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardUndrlygSecuritiesAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardUndrlygSecuritiesAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardUndrlygSecuritiesAmt" xlink:to="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract_a62c9a90-cf8f-4db6-bda8-b805366763c3_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio/Supplemental Data:</link:label>
    <link:label id="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract_label_en-US" xlink:label="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Ratio/Supplemental Data [Abstract]</link:label>
    <link:label id="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Ratio/Supplemental Data</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyRatioSupplementalDataAbstract"/>
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    <link:label id="lab_dei_AmendmentFlag_903390cc-a0f2-4fa4-acb4-661a010c7c60_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
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    <link:label id="lab_arcc_DividendsAndDistributionsTextBlock_954339a5-7d45-405a-b08e-759dd2cc4516_terseLabel_en-US" xlink:label="lab_arcc_DividendsAndDistributionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DIVIDENDS AND DISTRIBUTIONS</link:label>
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    <link:label id="lab_arcc_DividendsAndDistributionsTextBlock_documentation_en-US" xlink:label="lab_arcc_DividendsAndDistributionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividends And Distributions Text block</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DividendsAndDistributionsTextBlock" xlink:href="arcc-20241231.xsd#arcc_DividendsAndDistributionsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DividendsAndDistributionsTextBlock" xlink:to="lab_arcc_DividendsAndDistributionsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_d11d0b61-50c8-40ee-af45-b574f8d86e66_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying value</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:to="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember_799631d8-b356-4472-9017-aab20ed5afbc_terseLabel_en-US" xlink:label="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Independent Power and Renewable Electricity Producers</link:label>
    <link:label id="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember_label_en-US" xlink:label="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Independent Power And Renewable Electricity Producers [Member]</link:label>
    <link:label id="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember_documentation_en-US" xlink:label="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Independent Power And Renewable Electricity Producers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:href="arcc-20241231.xsd#arcc_IndependentPowerAndRenewableElectricityProducersMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:to="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubordinatedDebtMember_f859e2b0-9c66-4998-9327-85bac3b05dee_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated</link:label>
    <link:label id="lab_us-gaap_SubordinatedDebtMember_label_en-US" xlink:label="lab_us-gaap_SubordinatedDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubordinatedDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebtMember" xlink:to="lab_us-gaap_SubordinatedDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockAppreciationRightsSARSMember_terseLabel_en-US" xlink:label="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Appreciation Rights (SARs)</link:label>
    <link:label id="lab_us-gaap_StockAppreciationRightsSARSMember_label_en-US" xlink:label="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Appreciation Rights (SARs) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:to="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember_991bf725-fc18-4b04-91dc-4b7c0bfddf7e_terseLabel_en-US" xlink:label="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valcourt Holdings II, LLC and Jobs Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember_label_en-US" xlink:label="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valcourt Holdings II, LLC and Jobs Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Valcourt Holdings II, LLC and Jobs Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember" xlink:to="lab_arcc_ValcourtHoldingsIILLCAndJobsHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_ddcdb903-c59e-4f37-897b-7e01d55b493c_verboseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of borrowers</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_928f1fc6-f441-4be6-bbd8-538a69140792_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of borrowers in the SDLP</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_label_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Number of Borrowers</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Number of Borrowers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyNumberOfBorrowers" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyNumberOfBorrowers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyNumberOfBorrowers" xlink:to="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember_979809be-9249-46d9-b033-e8f5a02556ae_terseLabel_en-US" xlink:label="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alcami Corporation and ACM Note Holdings, LLC</link:label>
    <link:label id="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alcami Corporation and ACM Note Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alcami Corporation and ACM Note Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember" xlink:to="lab_arcc_AlcamiCorporationAndACMNoteHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LetterOfCreditFacilityMember_489299fe-22b8-4882-8caa-5ff7a66b0fbf_terseLabel_en-US" xlink:label="lab_arcc_LetterOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter Of Credit Facility</link:label>
    <link:label id="lab_arcc_LetterOfCreditFacilityMember_label_en-US" xlink:label="lab_arcc_LetterOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letter Of Credit Facility [Member]</link:label>
    <link:label id="lab_arcc_LetterOfCreditFacilityMember_documentation_en-US" xlink:label="lab_arcc_LetterOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Letter Of Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LetterOfCreditFacilityMember" xlink:href="arcc-20241231.xsd#arcc_LetterOfCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LetterOfCreditFacilityMember" xlink:to="lab_arcc_LetterOfCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_8649454d-934c-44ef-9d54-c0adde640ab9_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restrictions on Cash and Cash Equivalents [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DyeDurhamCorporationMember_e71b428d-5938-48e8-9bbf-8661c208e2b4_terseLabel_en-US" xlink:label="lab_arcc_DyeDurhamCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dye &amp; Durham Corporation</link:label>
    <link:label id="lab_arcc_DyeDurhamCorporationMember_label_en-US" xlink:label="lab_arcc_DyeDurhamCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dye &amp; Durham Corporation [Member]</link:label>
    <link:label id="lab_arcc_DyeDurhamCorporationMember_documentation_en-US" xlink:label="lab_arcc_DyeDurhamCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dye &amp; Durham Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DyeDurhamCorporationMember" xlink:href="arcc-20241231.xsd#arcc_DyeDurhamCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DyeDurhamCorporationMember" xlink:to="lab_arcc_DyeDurhamCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsAbstract" xlink:to="lab_us-gaap_SubsequentEventsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2023M10DividendsMember_bdb6193c-dce3-4e9d-8998-fca19c9b8b1f_terseLabel_en-US" xlink:label="lab_arcc_O2023M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 24,2023</link:label>
    <link:label id="lab_arcc_O2023M10DividendsMember_label_en-US" xlink:label="lab_arcc_O2023M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2023 M10 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2023M10DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2023M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, October Twenty Fourth Two Thousand Twenty Three O 2023 M10 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2023M10DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2023M10DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2023M10DividendsMember" xlink:to="lab_arcc_O2023M10DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_99029cb2-4341-436a-86de-157919bc6011_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Shares Issued (in shares)</link:label>
    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_3d421c4a-f6b8-49f0-94fe-7439395ca30d_verboseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_label_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Number of Shares Issued in Transaction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_dd3d1a2b-493b-4aa4-8b94-84e077037ef4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DEBT</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock" xlink:to="lab_us-gaap_DebtDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember_9cb3e8f8-e262-4035-92e9-db5235ba112c_terseLabel_en-US" xlink:label="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Metatiedot Bidco OY and Metatiedot US, LLC</link:label>
    <link:label id="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember_label_en-US" xlink:label="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Metatiedot Bidco OY and Metatiedot US, LLC [Member]</link:label>
    <link:label id="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember_documentation_en-US" xlink:label="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Metatiedot Bidco OY and Metatiedot US, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:href="arcc-20241231.xsd#arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:to="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NomiHealthIncMember_9cac6d9d-b4d7-4e1b-a045-3aa843400b08_terseLabel_en-US" xlink:label="lab_arcc_NomiHealthIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nomi Health, Inc.</link:label>
    <link:label id="lab_arcc_NomiHealthIncMember_label_en-US" xlink:label="lab_arcc_NomiHealthIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nomi Health, Inc. [Member]</link:label>
    <link:label id="lab_arcc_NomiHealthIncMember_documentation_en-US" xlink:label="lab_arcc_NomiHealthIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nomi Health, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NomiHealthIncMember" xlink:href="arcc-20241231.xsd#arcc_NomiHealthIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NomiHealthIncMember" xlink:to="lab_arcc_NomiHealthIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8ce74971-975d-4ed5-9d34-58742e7f9a45_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember_6422eb6b-4d01-484a-b561-a5d14625b8c3_terseLabel_en-US" xlink:label="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RMS Holdco II, LLC &amp; RMS Group Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RMS Holdco II, LLC &amp; RMS Group Holdings, Inc.</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_285514cb-f9f1-44af-8ded-87d5e0410ee1_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate principal amount of unsecured notes</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_8940bf1e-5c7b-4651-9c17-62440017c7c8_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Principal Amount Issued</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount" xlink:type="arc" order="1"/>
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    <link:label id="lab_dei_EntityAddressPostalZipCode_e9638aa9-13ce-4115-886b-09bc88716817_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
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    <link:label id="lab_us-gaap_InterestRateSwapMember_8f1fe71a-80de-435d-b673-094923a71398_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap</link:label>
    <link:label id="lab_us-gaap_InterestRateSwapMember_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateSwapMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember" xlink:to="lab_us-gaap_InterestRateSwapMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember_c654d2eb-8e17-45a9-8acf-471aca0010b7_terseLabel_en-US" xlink:label="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Perigon Wealth Management, LLC, Perigon Wealth Advisors Holdings Company, LLC and CWC Fund I Co-Invest (Prism) LP</link:label>
    <link:label id="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember_label_en-US" xlink:label="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Perigon Wealth Management, LLC, Perigon Wealth Advisors Holdings Company, LLC and CWC Fund I Co-Invest (Prism) LP [Member]</link:label>
    <link:label id="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember_documentation_en-US" xlink:label="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Perigon Wealth Management, LLC, Perigon Wealth Advisors Holdings Company, LLC and CWC Fund I Co-Invest (Prism) LP</link:label>
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    <link:label id="lab_arcc_O2024M10DividendsMember_44dbd6de-c432-4bba-a994-fa6763f3f096_terseLabel_en-US" xlink:label="lab_arcc_O2024M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 30, 2024</link:label>
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    <link:label id="lab_arcc_O2024M10DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2024M10DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, October Thirtieth Two Thousand Twenty Four O 2024 M10 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2024M10DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2024M10DividendsMember"/>
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    <link:label id="lab_arcc_BernerFoodBeverageLLCMember_3d73f2a0-3ce0-4abd-955d-e77cb2f7e156_terseLabel_en-US" xlink:label="lab_arcc_BernerFoodBeverageLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Berner Food &amp; Beverage, LLC</link:label>
    <link:label id="lab_arcc_BernerFoodBeverageLLCMember_label_en-US" xlink:label="lab_arcc_BernerFoodBeverageLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Berner Food &amp; Beverage, LLC [Member]</link:label>
    <link:label id="lab_arcc_BernerFoodBeverageLLCMember_documentation_en-US" xlink:label="lab_arcc_BernerFoodBeverageLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Berner Food &amp; Beverage, LLC</link:label>
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    <link:label id="lab_us-gaap_ManagementFeePayable_490784bd-9d7a-4038-bfc5-f4c55f91d90a_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementFeePayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee payable</link:label>
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    <link:label id="lab_arcc_PhoenixYWBuyerInc.AndPhoenixYWParentInc.Member_fd4ff677-4b6c-4361-9e9c-3acb963de14a_terseLabel_en-US" xlink:label="lab_arcc_PhoenixYWBuyerInc.AndPhoenixYWParentInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Phoenix YW Buyer, Inc. and Phoenix YW Parent, Inc.</link:label>
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    <link:label id="lab_arcc_RiskOfChangesInLawsOrRegulationsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfChangesInLawsOrRegulationsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Changes In Laws Or Regulations</link:label>
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    <link:label id="lab_arcc_AIFireBuyerIncAndAIFireParentLLCMember_12a7ef6e-6973-4713-88ac-7c31676a08bf_terseLabel_en-US" xlink:label="lab_arcc_AIFireBuyerIncAndAIFireParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AI Fire Buyer, Inc. and AI Fire Parent LLC</link:label>
    <link:label id="lab_arcc_AIFireBuyerIncAndAIFireParentLLCMember_label_en-US" xlink:label="lab_arcc_AIFireBuyerIncAndAIFireParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AI Fire Buyer, Inc. and AI Fire Parent LLC [Member]</link:label>
    <link:label id="lab_arcc_AIFireBuyerIncAndAIFireParentLLCMember_documentation_en-US" xlink:label="lab_arcc_AIFireBuyerIncAndAIFireParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AI Fire Buyer, Inc. and AI Fire Parent LLC</link:label>
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    <link:label id="lab_arcc_HouseholdAndPersonalProductsMember_453c44a4-8c55-405c-9cbc-b3faf69f8ed2_terseLabel_en-US" xlink:label="lab_arcc_HouseholdAndPersonalProductsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Household and Personal Products</link:label>
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    <link:label id="lab_arcc_RiskOfHighlyLeveragedPortfolioCompaniesMember_label_en-US" xlink:label="lab_arcc_RiskOfHighlyLeveragedPortfolioCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Highly Leveraged Portfolio Companies [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfHighlyLeveragedPortfolioCompaniesMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfHighlyLeveragedPortfolioCompaniesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfHighlyLeveragedPortfolioCompaniesMember" xlink:to="lab_arcc_RiskOfHighlyLeveragedPortfolioCompaniesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized_2ae1e824-547b-4cb2-bbcd-e0f82c9f1ce2_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency and other transactions</link:label>
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    <link:label id="lab_arcc_ZincBuyerCorporationMember_c70d2965-da3d-4082-92c1-fe4448673dd6_terseLabel_en-US" xlink:label="lab_arcc_ZincBuyerCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Zinc Buyer Corporation</link:label>
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    <link:label id="lab_arcc_ZincBuyerCorporationMember_documentation_en-US" xlink:label="lab_arcc_ZincBuyerCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Zinc Buyer Corporation</link:label>
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    <link:label id="lab_us-gaap_DesignatedAsHedgingInstrumentMember_feace438-94b7-4082-b648-1e462378449a_terseLabel_en-US" xlink:label="lab_us-gaap_DesignatedAsHedgingInstrumentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedged Item</link:label>
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    <link:label id="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember_0b04d495-6de5-44aa-9ec6-4254069247c1_terseLabel_en-US" xlink:label="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TCI Buyer LLC and TCI Holdings, LP</link:label>
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    <link:label id="lab_us-gaap_MarketApproachValuationTechniqueMember_0cf74148-0fca-423b-80ce-9df4a51280b2_terseLabel_en-US" xlink:label="lab_us-gaap_MarketApproachValuationTechniqueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EV market multiple analysis</link:label>
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    <link:label id="lab_arcc_InvestmentCompanyAgreementsTextBlock_4a1c6901-4f46-4684-bf3f-95d3d2502428_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AGREEMENTS</link:label>
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    <link:label id="lab_arcc_RiskOfDependencyOnInformationSystemsMember_label_en-US" xlink:label="lab_arcc_RiskOfDependencyOnInformationSystemsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Dependency On Information Systems [Member]</link:label>
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    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember_0ff54d12-bbd1-4615-b2a5-d45268de7a0b_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and other liabilities</link:label>
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    <link:label id="lab_us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_d9c2bfda-7f37-4d3a-9e14-23d2e89c659d_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ORGANIZATION</link:label>
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    <link:label id="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember_423e0ef4-9c2c-4a4b-a23b-1ee1cea5f69e_terseLabel_en-US" xlink:label="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Second lien senior secured loans</link:label>
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    <link:label id="lab_arcc_QnnectLLCAndConnectorTopCoLPMember_134ede0c-12f8-449f-90f4-e0af9fa0e35c_terseLabel_en-US" xlink:label="lab_arcc_QnnectLLCAndConnectorTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Qnnect, LLC and Connector TopCo, LP</link:label>
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    <link:label id="lab_arcc_TheUltimusGroupMidcoLLCTheUltimusGroupLLCAndTheUltimusGroupAggregatorLPMember_a0bd148b-3098-4fac-a139-4d5e1b325cb8_terseLabel_en-US" xlink:label="lab_arcc_TheUltimusGroupMidcoLLCTheUltimusGroupLLCAndTheUltimusGroupAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP</link:label>
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    <link:label id="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod_1f3693e5-c2e4-4a39-a97d-b2345e21a115_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Termination notice period</link:label>
    <link:label id="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod_label_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Agreement, Termination Notice Period</link:label>
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    <link:label id="lab_us-gaap_ConsumerSectorMember_402000e0-90e1-42a9-b26d-e7d3156a77bb_terseLabel_en-US" xlink:label="lab_us-gaap_ConsumerSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Services</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsumerSectorMember" xlink:to="lab_us-gaap_ConsumerSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_d7732188-6c84-426e-bf1a-febec4a2edd6_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentAxis" xlink:to="lab_us-gaap_DebtInstrumentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember_7735fe48-6dd4-47b0-a0b1-1c0b224d05d8_terseLabel_en-US" xlink:label="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Absolute Dental Group LLC and Absolute Dental Equity, LLC</link:label>
    <link:label id="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember_label_en-US" xlink:label="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Absolute Dental Group LLC and Absolute Dental Equity, LLC [Member]</link:label>
    <link:label id="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember_documentation_en-US" xlink:label="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Absolute Dental Group LLC and Absolute Dental Equity, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:href="arcc-20241231.xsd#arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember"/>
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    <link:label id="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember_b0ce8499-c957-42a9-8e0b-1d6296722d27_terseLabel_en-US" xlink:label="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AMCP Clean Acquisition Company, LLC</link:label>
    <link:label id="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember_label_en-US" xlink:label="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AMCP Clean Acquisition Company, LLC [Member]</link:label>
    <link:label id="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember_documentation_en-US" xlink:label="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AMCP Clean Acquisition Company, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AMCPCleanAcquisitionCompanyLLCMember" xlink:href="arcc-20241231.xsd#arcc_AMCPCleanAcquisitionCompanyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AMCPCleanAcquisitionCompanyLLCMember" xlink:to="lab_arcc_AMCPCleanAcquisitionCompanyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfProvisionsOfMarylandGeneralCorporationLawMember_label_en-US" xlink:label="lab_arcc_RiskOfProvisionsOfMarylandGeneralCorporationLawMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Provisions Of Maryland General Corporation Law [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfProvisionsOfMarylandGeneralCorporationLawMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfProvisionsOfMarylandGeneralCorporationLawMember"/>
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    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationNonDeductibleTaxExpenseIncreaseDecreaseInTaxableIncome_c442aa69-b239-4b24-af81-744a72605ce0_terseLabel_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationNonDeductibleTaxExpenseIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expenses not currently deductible</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLoss_ca262101-43cc-4e1e-8848-570ea53c19f9_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase in members&#8217; capital resulting from operations</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_47deb56e-e772-4140-98d9-3bd02cdbbf52_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net increase in stockholders' equity resulting from operations</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLoss_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
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    <link:label id="lab_ecd_TradingArrAxis_terseLabel_en-US" xlink:label="lab_ecd_TradingArrAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Arrangement:</link:label>
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    <link:label id="lab_arcc_RiskOfFutureIssuanceOfPreferredStockMember_label_en-US" xlink:label="lab_arcc_RiskOfFutureIssuanceOfPreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Future Issuance Of Preferred Stock [Member]</link:label>
    <link:label id="lab_arcc_RiskOfFutureIssuanceOfPreferredStockMember_documentation_en-US" xlink:label="lab_arcc_RiskOfFutureIssuanceOfPreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Future Issuance Of Preferred Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfFutureIssuanceOfPreferredStockMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfFutureIssuanceOfPreferredStockMember"/>
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    <link:label id="lab_arcc_CapitalGoodsMember_2cb3036a-909c-40ff-9b8e-e6eb6731c682_terseLabel_en-US" xlink:label="lab_arcc_CapitalGoodsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Goods</link:label>
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    <link:label id="lab_arcc_CapitalGoodsMember_documentation_en-US" xlink:label="lab_arcc_CapitalGoodsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Goods</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CapitalGoodsMember" xlink:href="arcc-20241231.xsd#arcc_CapitalGoodsMember"/>
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    <link:label id="lab_arcc_June2027NotesMember_2ba9355e-218f-405b-a73e-fa6ebb060e6b_verboseLabel_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">June 2027 Notes</link:label>
    <link:label id="lab_arcc_June2027NotesMember_bb4ec449-9432-4d94-bb1d-f89137bd2210_terseLabel_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">June 2027 Notes (principal amount outstanding of $500)</link:label>
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    <link:label id="lab_arcc_June2027NotesMember_documentation_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">June 2027 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_June2027NotesMember" xlink:href="arcc-20241231.xsd#arcc_June2027NotesMember"/>
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    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_4e32d8ad-87d0-4fc8-8270-a3c02bac79e8_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net amortization of premium on notes payable</link:label>
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    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_label_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Discount (Premium)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PvpTableTextBlock_terseLabel_en-US" xlink:label="lab_ecd_PvpTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure, Table</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfInvestmentsAbstract_35bb323f-5416-4911-ac28-ac7563dae402_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Abstract]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsAbstract_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfInvestmentsAbstract"/>
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    <link:label id="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Excluding Value Reported in Compensation Table</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SeniorDirectLendingProgramLLCMember_b4df931a-e565-455f-962b-d9ab5bae034f_terseLabel_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program, LLC</link:label>
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    <link:label id="lab_arcc_SeniorDirectLendingProgramLLCMember_documentation_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SeniorDirectLendingProgramLLCMember" xlink:href="arcc-20241231.xsd#arcc_SeniorDirectLendingProgramLLCMember"/>
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    <link:label id="lab_arcc_StAthenaGlobalLLCAndStAthenaGlobalHoldingsLimitedMember_7c07d41d-2de0-410f-b33a-22484b7bb6bd_terseLabel_en-US" xlink:label="lab_arcc_StAthenaGlobalLLCAndStAthenaGlobalHoldingsLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">St Athena Global LLC and St Athena Global Holdings Limited</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_StAthenaGlobalLLCAndStAthenaGlobalHoldingsLimitedMember" xlink:to="lab_arcc_StAthenaGlobalLLCAndStAthenaGlobalHoldingsLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MiamiBeckhamUnitedLLCMember_dd5f05c4-22f0-419a-8590-70e38f1f3283_terseLabel_en-US" xlink:label="lab_arcc_MiamiBeckhamUnitedLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Miami Beckham United LLC</link:label>
    <link:label id="lab_arcc_MiamiBeckhamUnitedLLCMember_label_en-US" xlink:label="lab_arcc_MiamiBeckhamUnitedLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Miami Beckham United LLC [Member]</link:label>
    <link:label id="lab_arcc_MiamiBeckhamUnitedLLCMember_documentation_en-US" xlink:label="lab_arcc_MiamiBeckhamUnitedLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Miami Beckham United LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MiamiBeckhamUnitedLLCMember" xlink:href="arcc-20241231.xsd#arcc_MiamiBeckhamUnitedLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MiamiBeckhamUnitedLLCMember" xlink:to="lab_arcc_MiamiBeckhamUnitedLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_af87471d-f1e6-4c96-8ed9-d39aef0ab07e_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities Act File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayable_26425aaa-6263-46d5-968b-2167d2c9639c_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains incentive fee payable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayable_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Incentive Fee Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayable" xlink:to="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayable" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_d7b64cbc-cff9-4cf2-b856-ac30b92b661c_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesDomain" xlink:to="lab_srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_6716ad83-2bb4-4360-89fb-12c73a881b2e_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ExtinguishmentOfDebtAmount_9b54046a-fb8d-4ac5-b7f4-675c85bf7ccc_terseLabel_en-US" xlink:label="lab_us-gaap_ExtinguishmentOfDebtAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Extinguishment of debt, amount</link:label>
    <link:label id="lab_us-gaap_ExtinguishmentOfDebtAmount_label_en-US" xlink:label="lab_us-gaap_ExtinguishmentOfDebtAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Extinguishment of Debt, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExtinguishmentOfDebtAmount" xlink:to="lab_us-gaap_ExtinguishmentOfDebtAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_f0d92b70-28ab-4788-a8f7-e84c643def8f_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WEIGHTED AVERAGE SHARES OF COMMON STOCK OUTSTANDING</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding Reconciliation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember_080186d1-cebe-4b91-8c0b-6dcf010dfc11_terseLabel_en-US" xlink:label="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Infinity Home Services HoldCo, Inc. and IHS Parent Holdings, L.P.</link:label>
    <link:label id="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Infinity Home Services HoldCo, Inc. and IHS Parent Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Infinity Home Services HoldCo, Inc. and IHS Parent Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember" xlink:to="lab_arcc_InfinityHomeServicesHoldCoIncAndIHSParentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine2_522321d0-0383-4890-9842-2c29448cc93b_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine2"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine2" xlink:to="lab_dei_EntityAddressAddressLine2" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsCommonStock_0223fd94-d917-4dc5-9836-7158c896ec54_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total amount</link:label>
    <link:label id="lab_us-gaap_DividendsCommonStock_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStock" xlink:to="lab_us-gaap_DividendsCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryIndName_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryIndName_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_ForgoneRecoveryIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryIndName" xlink:to="lab_ecd_ForgoneRecoveryIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PeopleCorporationMember_1c540b13-2fc8-4231-855d-c75965737564_terseLabel_en-US" xlink:label="lab_arcc_PeopleCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">People Corporation</link:label>
    <link:label id="lab_arcc_PeopleCorporationMember_label_en-US" xlink:label="lab_arcc_PeopleCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">People Corporation [Member]</link:label>
    <link:label id="lab_arcc_PeopleCorporationMember_documentation_en-US" xlink:label="lab_arcc_PeopleCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">People Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PeopleCorporationMember" xlink:href="arcc-20241231.xsd#arcc_PeopleCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PeopleCorporationMember" xlink:to="lab_arcc_PeopleCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember_bffb1796-4335-4b4e-bd82-b4a6bd972785_terseLabel_en-US" xlink:label="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DTI Holdco, Inc. and OPE DTI Holdings, Inc.</link:label>
    <link:label id="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember_label_en-US" xlink:label="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DTI Holdco, Inc. and OPE DTI Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DTI Holdco, Inc. and OPE DTI Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:to="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AresCapitalManagementMember_e8321eff-b0f5-4ddd-ba8c-9ce4edd08d9a_terseLabel_en-US" xlink:label="lab_arcc_AresCapitalManagementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ares Capital Management</link:label>
    <link:label id="lab_arcc_AresCapitalManagementMember_label_en-US" xlink:label="lab_arcc_AresCapitalManagementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ares Capital Management [Member]</link:label>
    <link:label id="lab_arcc_AresCapitalManagementMember_documentation_en-US" xlink:label="lab_arcc_AresCapitalManagementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ares Capital Management</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AresCapitalManagementMember" xlink:href="arcc-20241231.xsd#arcc_AresCapitalManagementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AresCapitalManagementMember" xlink:to="lab_arcc_AresCapitalManagementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentPolicyTextBlock_d4ecf49d-857c-44e8-b1d4-d461d9629cf6_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments</link:label>
    <link:label id="lab_us-gaap_InvestmentPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentPolicyTextBlock" xlink:to="lab_us-gaap_InvestmentPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMnpiCnsdrdFlag_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Considered</link:label>
    <link:label id="lab_ecd_AwardTmgMnpiCnsdrdFlag_label_en-US" xlink:label="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Considered [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardTmgMnpiCnsdrdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:to="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2024M2DividendsMember_b19e6913-f3d4-4c9c-84b0-2f79326bff56_terseLabel_en-US" xlink:label="lab_arcc_O2024M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 7, 2024</link:label>
    <link:label id="lab_arcc_O2024M2DividendsMember_label_en-US" xlink:label="lab_arcc_O2024M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2024 M2 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2024M2DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2024M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, February Seventh Two Thousand Twenty Four O 2024 M2 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2024M2DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2024M2DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2024M2DividendsMember" xlink:to="lab_arcc_O2024M2DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_0962311c-5110-477d-9a2b-3c3b966554aa_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares issued in connection with dividend reinvestment plan</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_8552ebbf-a729-4774-bcd7-56b42e2f2831_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems" xlink:to="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MidwestRegionMember_2bd100d8-a5e9-4b02-9cec-a32a7863c4e5_terseLabel_en-US" xlink:label="lab_us-gaap_MidwestRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Midwest</link:label>
    <link:label id="lab_us-gaap_MidwestRegionMember_label_en-US" xlink:label="lab_us-gaap_MidwestRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Midwest Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MidwestRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MidwestRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MidwestRegionMember" xlink:to="lab_us-gaap_MidwestRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyAbstract" xlink:to="lab_us-gaap_InvestmentCompanyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember_1c1c856c-432a-445b-9173-67788b146b09_terseLabel_en-US" xlink:label="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Royal Borrower, LLC and Royal Parent, LP</link:label>
    <link:label id="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember_label_en-US" xlink:label="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Royal Borrower, LLC and Royal Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember_documentation_en-US" xlink:label="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Royal Borrower, LLC and Royal Parent, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:href="arcc-20241231.xsd#arcc_RoyalBorrowerLLCAndRoyalParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:to="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember_fdcab10a-df20-47e5-8158-87565d98b4a1_terseLabel_en-US" xlink:label="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Centric Brands LLC and Centric Brands GP LLC</link:label>
    <link:label id="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember_label_en-US" xlink:label="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Centric Brands LLC and Centric Brands GP LLC [Member]</link:label>
    <link:label id="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember_documentation_en-US" xlink:label="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Centric Brands LLC and Centric Brands GP LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember" xlink:href="arcc-20241231.xsd#arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember" xlink:to="lab_arcc_CentricBrandsLLCAndCentricBrandsGPLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingAggtErrCompAmt_terseLabel_en-US" xlink:label="lab_ecd_OutstandingAggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding Aggregate Erroneous Compensation Amount</link:label>
    <link:label id="lab_ecd_OutstandingAggtErrCompAmt_label_en-US" xlink:label="lab_ecd_OutstandingAggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Aggregate Erroneous Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingAggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_OutstandingAggtErrCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingAggtErrCompAmt" xlink:to="lab_ecd_OutstandingAggtErrCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EquinoxHoldingsInc.Member_5b564bdd-ad54-4b4a-b514-63cfd6b9ea41_terseLabel_en-US" xlink:label="lab_arcc_EquinoxHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equinox Holdings, Inc.</link:label>
    <link:label id="lab_arcc_EquinoxHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_EquinoxHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equinox Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EquinoxHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_EquinoxHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equinox Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EquinoxHoldingsInc.Member" xlink:href="arcc-20241231.xsd#arcc_EquinoxHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EquinoxHoldingsInc.Member" xlink:to="lab_arcc_EquinoxHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GIRangerIntermediateLLCMember_8cff15d7-6d59-4e78-97f2-d1805a26c910_terseLabel_en-US" xlink:label="lab_arcc_GIRangerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GI Ranger Intermediate LLC</link:label>
    <link:label id="lab_arcc_GIRangerIntermediateLLCMember_label_en-US" xlink:label="lab_arcc_GIRangerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GI Ranger Intermediate LLC [Member]</link:label>
    <link:label id="lab_arcc_GIRangerIntermediateLLCMember_documentation_en-US" xlink:label="lab_arcc_GIRangerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GI Ranger Intermediate LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GIRangerIntermediateLLCMember" xlink:href="arcc-20241231.xsd#arcc_GIRangerIntermediateLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GIRangerIntermediateLLCMember" xlink:to="lab_arcc_GIRangerIntermediateLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoActuallyPaidCompAmt_terseLabel_en-US" xlink:label="lab_ecd_PeoActuallyPaidCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Actually Paid Compensation Amount</link:label>
    <link:label id="lab_ecd_PeoActuallyPaidCompAmt_label_en-US" xlink:label="lab_ecd_PeoActuallyPaidCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Actually Paid Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoActuallyPaidCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PeoActuallyPaidCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoActuallyPaidCompAmt" xlink:to="lab_ecd_PeoActuallyPaidCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HarveyToolCompanyLLCMember_17bdd256-f6cf-460c-9a89-e5214a472567_terseLabel_en-US" xlink:label="lab_arcc_HarveyToolCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Harvey Tool Company, LLC</link:label>
    <link:label id="lab_arcc_HarveyToolCompanyLLCMember_label_en-US" xlink:label="lab_arcc_HarveyToolCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Harvey Tool Company, LLC [Member]</link:label>
    <link:label id="lab_arcc_HarveyToolCompanyLLCMember_documentation_en-US" xlink:label="lab_arcc_HarveyToolCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Harvey Tool Company, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HarveyToolCompanyLLCMember" xlink:href="arcc-20241231.xsd#arcc_HarveyToolCompanyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HarveyToolCompanyLLCMember" xlink:to="lab_arcc_HarveyToolCompanyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember_f1d7f89c-c2c6-430c-bc12-4a332da931d9_terseLabel_en-US" xlink:label="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repairify, Inc. and Repairify Holdings, LLC</link:label>
    <link:label id="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repairify, Inc. and Repairify Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repairify, Inc. and Repairify Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RepairifyIncAndRepairifyHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_RepairifyIncAndRepairifyHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RepairifyIncAndRepairifyHoldingsLLCMember" xlink:to="lab_arcc_RepairifyIncAndRepairifyHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember_833bb453-2f9f-4847-b7c3-6a49de84f794_terseLabel_en-US" xlink:label="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kene Acquisition, Inc. and Kene Holdings, L.P.</link:label>
    <link:label id="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember_label_en-US" xlink:label="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kene Acquisition, Inc. and Kene Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kene Acquisition, Inc. and Kene Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_KeneAcquisitionIncAndKeneHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember" xlink:to="lab_arcc_KeneAcquisitionIncAndKeneHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember_4a53d2a5-2431-4dcd-aa4b-314dfe7ae051_terseLabel_en-US" xlink:label="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Paragon 28, Inc. and Paragon Advanced Technologies, Inc.</link:label>
    <link:label id="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember_label_en-US" xlink:label="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Paragon 28, Inc. and Paragon Advanced Technologies, Inc. [Member]</link:label>
    <link:label id="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember_documentation_en-US" xlink:label="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Paragon 28, Inc. and Paragon Advanced Technologies, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember" xlink:href="arcc-20241231.xsd#arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember" xlink:to="lab_arcc_Paragon28IncAndParagonAdvancedTechnologiesIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HuFriedyGroupAcquisitionLLCMember_7c7f8291-3314-4b25-a096-dec2279a1300_terseLabel_en-US" xlink:label="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HuFriedy Group Acquisition LLC</link:label>
    <link:label id="lab_arcc_HuFriedyGroupAcquisitionLLCMember_label_en-US" xlink:label="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HuFriedy Group Acquisition LLC [Member]</link:label>
    <link:label id="lab_arcc_HuFriedyGroupAcquisitionLLCMember_documentation_en-US" xlink:label="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HuFriedy Group Acquisition LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:href="arcc-20241231.xsd#arcc_HuFriedyGroupAcquisitionLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:to="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToCompAxis_terseLabel_en-US" xlink:label="lab_ecd_AdjToCompAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation:</link:label>
    <link:label id="lab_ecd_AdjToCompAxis_label_en-US" xlink:label="lab_ecd_AdjToCompAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAxis" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AdjToCompAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToCompAxis" xlink:to="lab_ecd_AdjToCompAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_c1d6bf47-ec2c-43a1-842c-ffa7ed36610d_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Net income (loss) attributable to non-controlling interests in Consolidated IHAM Vehicles</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_9aefb730-2f51-4cbe-aae3-3087d81db881_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]</link:label>
    <link:label id="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_label_en-US" xlink:label="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsidiary or Equity Method Investee, Sale of Stock, Type [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:to="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember_82965932-6e57-49fa-a4f7-fc6ccd5379a4_terseLabel_en-US" xlink:label="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Genesis Acquisition Co. and Genesis Ultimate Holding Co.</link:label>
    <link:label id="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember_label_en-US" xlink:label="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Genesis Acquisition Co. and Genesis Ultimate Holding Co. [Member]</link:label>
    <link:label id="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember_documentation_en-US" xlink:label="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Genesis Acquisition Co. and Genesis Ultimate Holding Co.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember" xlink:href="arcc-20241231.xsd#arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember" xlink:to="lab_arcc_GenesisAcquisitionCoAndGenesisUltimateHoldingCoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerStaplesDistributionAndRetailMember_0f743a6c-3ad8-44e7-bd06-8ea7f6266514_terseLabel_en-US" xlink:label="lab_arcc_ConsumerStaplesDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Staples Distribution and Retail</link:label>
    <link:label id="lab_arcc_ConsumerStaplesDistributionAndRetailMember_label_en-US" xlink:label="lab_arcc_ConsumerStaplesDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Staples Distribution And Retail [Member]</link:label>
    <link:label id="lab_arcc_ConsumerStaplesDistributionAndRetailMember_documentation_en-US" xlink:label="lab_arcc_ConsumerStaplesDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Staples Distribution And Retail</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerStaplesDistributionAndRetailMember" xlink:href="arcc-20241231.xsd#arcc_ConsumerStaplesDistributionAndRetailMember"/>
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    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_91673b58-f2f5-4214-982b-2d14ca1e0e8f_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized losses on investments and foreign currency transactions</link:label>
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    <link:label id="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember_8e1ac5fa-9fb4-4755-bcdc-b7987c3a9b40_terseLabel_en-US" xlink:label="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DOXA Insurance Holdings LLC and Rocket Co-Invest, SLP</link:label>
    <link:label id="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember_label_en-US" xlink:label="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DOXA Insurance Holdings LLC and Rocket Co-Invest, SLP [Member]</link:label>
    <link:label id="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember_documentation_en-US" xlink:label="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DOXA Insurance Holdings LLC and Rocket Co-Invest, SLP</link:label>
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    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_dc4fb9d3-f2cd-4a51-85dc-eb37332656cc_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnAdjsSvcCstMember" xlink:to="lab_ecd_PnsnAdjsSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NonQualifyingAssetsMember_ed11c2c3-ec43-44c1-8491-ca8d1bb906eb_terseLabel_en-US" xlink:label="lab_arcc_NonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-qualifying assets</link:label>
    <link:label id="lab_arcc_NonQualifyingAssetsMember_label_en-US" xlink:label="lab_arcc_NonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Qualifying Assets [Member]</link:label>
    <link:label id="lab_arcc_NonQualifyingAssetsMember_documentation_en-US" xlink:label="lab_arcc_NonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-Qualifying Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NonQualifyingAssetsMember" xlink:href="arcc-20241231.xsd#arcc_NonQualifyingAssetsMember"/>
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    <link:label id="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember_68d1c56b-e591-46ba-ad8e-1a9d86ec34bf_terseLabel_en-US" xlink:label="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Appriss Health, LLC and Appriss Health Intermediate Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember_label_en-US" xlink:label="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Appriss Health, LLC and Appriss Health Intermediate Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Appriss Health, LLC and Appriss Health Intermediate Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember" xlink:to="lab_arcc_ApprissHealthLLCAndApprissHealthIntermediateHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember_23b1e6b8-23c7-410c-a74c-e08833a9cae0_terseLabel_en-US" xlink:label="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Worldwide Produce Acquisition, LLC and REP WWP Coinvest IV, L.P.</link:label>
    <link:label id="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember_label_en-US" xlink:label="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Worldwide Produce Acquisition, LLC and REP WWP Coinvest IV, L.P. [Member]</link:label>
    <link:label id="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember_documentation_en-US" xlink:label="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Worldwide Produce Acquisition, LLC and REP WWP Coinvest IV, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:href="arcc-20241231.xsd#arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:to="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_YEBrandsHoldingsLLCMember_d042a63d-acd0-4771-a8ca-dc1b298e6dfe_terseLabel_en-US" xlink:label="lab_arcc_YEBrandsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">YE Brands Holdings, LLC</link:label>
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    <link:label id="lab_arcc_RiskOfSubstantialSalesOfCommonStockMember_label_en-US" xlink:label="lab_arcc_RiskOfSubstantialSalesOfCommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Substantial Sales Of Common Stock [Member]</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_765b40d1-140a-486b-8136-ccb0a115cdda_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WildcatBuyerCoIncAndWildcatParentLPMember_425ddb13-672b-4774-a581-eef56cc4b0ef_terseLabel_en-US" xlink:label="lab_arcc_WildcatBuyerCoIncAndWildcatParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wildcat BuyerCo, Inc. and Wildcat Parent, LP</link:label>
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    <link:label id="lab_arcc_WildcatBuyerCoIncAndWildcatParentLPMember_documentation_en-US" xlink:label="lab_arcc_WildcatBuyerCoIncAndWildcatParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wildcat BuyerCo, Inc. and Wildcat Parent, LP</link:label>
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    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_fdb2a813-fe89-4a12-ba1b-495d33499f61_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic (in shares)</link:label>
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    <link:label id="lab_arcc_IncreaseDecreaseInIncomeBasedFeesPayable_b1e048cb-8a7e-4099-8211-901c901625ac_terseLabel_en-US" xlink:label="lab_arcc_IncreaseDecreaseInIncomeBasedFeesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee payable</link:label>
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    <link:label id="lab_us-gaap_SubsidiarySaleOfStockLineItems_286d6e93-6978-4c72-9b1d-cdda0d26714e_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsidiary, Sale of Stock [Line Items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsidiarySaleOfStockLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems" xlink:to="lab_us-gaap_SubsidiarySaleOfStockLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember_d21c8ccb-5af4-48a4-bf5a-898738e6971b_terseLabel_en-US" xlink:label="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Anesthesia Partners, Inc. &amp; U.S. Anesthesia Partners Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">U.S. Anesthesia Partners, Inc. &amp; U.S. Anesthesia Partners Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:to="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NatureOfExpenseAxis_9129f5e1-1fca-48af-b171-15de5778a3a7_terseLabel_en-US" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nature of Expense [Axis]</link:label>
    <link:label id="lab_us-gaap_NatureOfExpenseAxis_label_en-US" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nature of Expense [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NatureOfExpenseAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NatureOfExpenseAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NatureOfExpenseAxis" xlink:to="lab_us-gaap_NatureOfExpenseAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SubordinatedDebtRelatedParty_a9c0ea07-549c-4e4c-9a09-abe4d282b40e_terseLabel_en-US" xlink:label="lab_arcc_SubordinatedDebtRelatedParty" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated note from ARCC</link:label>
    <link:label id="lab_arcc_SubordinatedDebtRelatedParty_label_en-US" xlink:label="lab_arcc_SubordinatedDebtRelatedParty" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt, Related Party</link:label>
    <link:label id="lab_arcc_SubordinatedDebtRelatedParty_documentation_en-US" xlink:label="lab_arcc_SubordinatedDebtRelatedParty" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subordinated Debt, Related Party</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SubordinatedDebtRelatedParty" xlink:href="arcc-20241231.xsd#arcc_SubordinatedDebtRelatedParty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SubordinatedDebtRelatedParty" xlink:to="lab_arcc_SubordinatedDebtRelatedParty" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember_3a60842d-524e-415d-a66a-0c1f68f723e2_terseLabel_en-US" xlink:label="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">American Seafoods Group LLC and American Seafoods Partners LLC</link:label>
    <link:label id="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember_label_en-US" xlink:label="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">American Seafoods Group LLC and American Seafoods Partners LLC [Member]</link:label>
    <link:label id="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember_documentation_en-US" xlink:label="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">American Seafoods Group LLC and American Seafoods Partners LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:href="arcc-20241231.xsd#arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:to="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscIndName_terseLabel_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscIndName_label_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscIndName" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardsCloseToMnpiDiscIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardsCloseToMnpiDiscIndName" xlink:to="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember_label_en-US" xlink:label="lab_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Investments In Privately Held Middle-Market Companies [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Investments In Privately Held Middle-Market Companies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember" xlink:to="lab_arcc_RiskOfInvestmentsInPrivatelyHeldMiddleMarketCompaniesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember_f46cef0e-e26f-4f2d-b080-0b83ac0300fd_terseLabel_en-US" xlink:label="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, LLC</link:label>
    <link:label id="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember_label_en-US" xlink:label="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:to="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember_a4e673d0-0bbe-43d7-ae49-1378509ee4ea_terseLabel_en-US" xlink:label="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Truck-Lite Co., LLC, Ecco Holdings Corp. and Clarience Technologies, LLC</link:label>
    <link:label id="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember_label_en-US" xlink:label="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Truck-Lite Co., LLC, Ecco Holdings Corp. and Clarience Technologies, LLC [Member]</link:label>
    <link:label id="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember_documentation_en-US" xlink:label="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Truck-Lite Co., LLC, Ecco Holdings Corp. and Clarience Technologies, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember" xlink:href="arcc-20241231.xsd#arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember" xlink:to="lab_arcc_TruckLiteCo.LLCEccoHoldingsCorp.AndClarienceTechnologiesLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember_5ad9a2ba-58e5-4c54-8c81-227b3ff10f8b_terseLabel_en-US" xlink:label="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving and delayed draw loan commitments</link:label>
    <link:label id="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember_label_en-US" xlink:label="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving and Delayed Draw Loan Commitments [Member]</link:label>
    <link:label id="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember_documentation_en-US" xlink:label="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving and Delayed Draw Loan Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:href="arcc-20241231.xsd#arcc_RevolvingAndDelayedDrawLoanCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:to="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ManagementFeeExpense_1e715ce0-ba4c-4b14-a126-cd1090be4029_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementFeeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee</link:label>
    <link:label id="lab_us-gaap_ManagementFeeExpense_4325ffcb-dcdb-4949-bcb2-f3a75c95ffe5_verboseLabel_en-US" xlink:label="lab_us-gaap_ManagementFeeExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Base management fee</link:label>
    <link:label id="lab_us-gaap_ManagementFeeExpense_label_en-US" xlink:label="lab_us-gaap_ManagementFeeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management Fee Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementFeeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ManagementFeeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementFeeExpense" xlink:to="lab_us-gaap_ManagementFeeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFilerCategory_39d0dd81-6d78-479c-a926-3d10f022eea1_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFilerCategory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory" xlink:to="lab_dei_EntityFilerCategory" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember_9485d94c-7dc9-48d9-be3e-b76df4c975b8_terseLabel_en-US" xlink:label="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">High Street Buyer, Inc. and High Street Holdco LLC</link:label>
    <link:label id="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember_label_en-US" xlink:label="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">High Street Buyer, Inc. and High Street Holdco LLC [Member]</link:label>
    <link:label id="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember_documentation_en-US" xlink:label="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">High Street Buyer, Inc. and High Street Holdco LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember" xlink:href="arcc-20241231.xsd#arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember" xlink:to="lab_arcc_HighStreetBuyerIncAndHighStreetHoldcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember_94f9c978-c803-4d54-95bb-f64253c3285a_terseLabel_en-US" xlink:label="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">KPS Global LLC and Cool Group LLC</link:label>
    <link:label id="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember_label_en-US" xlink:label="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">KPS Global LLC and Cool Group LLC [Member]</link:label>
    <link:label id="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">KPS Global LLC and Cool Group LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KPSGlobalLLCAndCoolGroupLLCMember" xlink:href="arcc-20241231.xsd#arcc_KPSGlobalLLCAndCoolGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KPSGlobalLLCAndCoolGroupLLCMember" xlink:to="lab_arcc_KPSGlobalLLCAndCoolGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FeeIncome_9242ad97-e232-451a-9fb1-0d359ae65b42_terseLabel_en-US" xlink:label="lab_us-gaap_FeeIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital structuring service fees</link:label>
    <link:label id="lab_us-gaap_FeeIncome_4f00f80d-0afb-4650-b3c0-3900e3aa01c9_verboseLabel_en-US" xlink:label="lab_us-gaap_FeeIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Capital structuring service fees and other income</link:label>
    <link:label id="lab_us-gaap_FeeIncome_label_en-US" xlink:label="lab_us-gaap_FeeIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fee Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FeeIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FeeIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FeeIncome" xlink:to="lab_us-gaap_FeeIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOK2Member_b182a4d9-5f79-4851-8e05-c6b0b2410fde_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOK2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 2</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOK2Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOK2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 2 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOK2Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOK2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractNOK2Member" xlink:href="arcc-20241231.xsd#arcc_ForeignCurrencyForwardContractNOK2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractNOK2Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractNOK2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthHavenStackBuyerLLCMember_5b4d979d-99ce-40bf-ad1e-55cec4d325dc_terseLabel_en-US" xlink:label="lab_arcc_NorthHavenStackBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North Haven Stack Buyer, LLC</link:label>
    <link:label id="lab_arcc_NorthHavenStackBuyerLLCMember_label_en-US" xlink:label="lab_arcc_NorthHavenStackBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North Haven Stack Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_NorthHavenStackBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_NorthHavenStackBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North Haven Stack Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthHavenStackBuyerLLCMember" xlink:href="arcc-20241231.xsd#arcc_NorthHavenStackBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthHavenStackBuyerLLCMember" xlink:to="lab_arcc_NorthHavenStackBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome_e92f85f2-3af7-402a-926a-1c04f66fbe77_terseLabel_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income not currently taxable</link:label>
    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome_label_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis Reconciliation, Income Not Taxable, Increase (Decrease) In Taxable Income</link:label>
    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome_documentation_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis Reconciliation, Income Not Taxable, Increase (Decrease) In Taxable Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome" xlink:href="arcc-20241231.xsd#arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome" xlink:to="lab_arcc_InvestmentTaxBasisReconciliationIncomeNotTaxableIncreaseDecreaseInTaxableIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HFoodHoldingsLLCAndMatterhornParentLLCMember_a1552127-2838-48b8-9bec-1fe8eb752fd4_terseLabel_en-US" xlink:label="lab_arcc_HFoodHoldingsLLCAndMatterhornParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">H-Food Holdings, LLC and Matterhorn Parent, LLC</link:label>
    <link:label id="lab_arcc_HFoodHoldingsLLCAndMatterhornParentLLCMember_label_en-US" xlink:label="lab_arcc_HFoodHoldingsLLCAndMatterhornParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">H-Food Holdings, LLC and Matterhorn Parent, LLC [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
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    <link:label id="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember_0466f4c5-0730-4409-99aa-1332e6d962d0_terseLabel_en-US" xlink:label="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC</link:label>
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    <link:label id="lab_arcc_IndustryConcentrationRiskMember_label_en-US" xlink:label="lab_arcc_IndustryConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry Concentration Risk [Member]</link:label>
    <link:label id="lab_arcc_IndustryConcentrationRiskMember_documentation_en-US" xlink:label="lab_arcc_IndustryConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Industry Concentration Risk</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IndustryConcentrationRiskMember" xlink:href="arcc-20241231.xsd#arcc_IndustryConcentrationRiskMember"/>
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    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_label_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativesFairValueLineItems"/>
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    <link:label id="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember_e80a95f4-47c8-480e-b265-7df899c3546b_terseLabel_en-US" xlink:label="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Heavy Construction Systems Specialists, LLC</link:label>
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    <link:label id="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember_documentation_en-US" xlink:label="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Heavy Construction Systems Specialists, LLC</link:label>
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    <link:label id="lab_arcc_RetainedEarningsAccumulatedNetRealizedLossesMember_label_en-US" xlink:label="lab_arcc_RetainedEarningsAccumulatedNetRealizedLossesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings, Accumulated Net Realized Losses [Member]</link:label>
    <link:label id="lab_arcc_RetainedEarningsAccumulatedNetRealizedLossesMember_documentation_en-US" xlink:label="lab_arcc_RetainedEarningsAccumulatedNetRealizedLossesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Retained Earnings, Accumulated Net Realized Losses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RetainedEarningsAccumulatedNetRealizedLossesMember" xlink:href="arcc-20241231.xsd#arcc_RetainedEarningsAccumulatedNetRealizedLossesMember"/>
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    <link:label id="lab_arcc_TempusLabsIncMember_96098485-0178-4ae5-8690-7e57fb997bb0_terseLabel_en-US" xlink:label="lab_arcc_TempusLabsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tempus Labs, Inc.</link:label>
    <link:label id="lab_arcc_TempusLabsIncMember_label_en-US" xlink:label="lab_arcc_TempusLabsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tempus Labs, Inc. [Member]</link:label>
    <link:label id="lab_arcc_TempusLabsIncMember_documentation_en-US" xlink:label="lab_arcc_TempusLabsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tempus Labs, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TempusLabsIncMember" xlink:href="arcc-20241231.xsd#arcc_TempusLabsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TempusLabsIncMember" xlink:to="lab_arcc_TempusLabsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember_4fb4fc99-f381-4b24-8be6-678809cb5a3f_terseLabel_en-US" xlink:label="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automotive Keys Group, LLC and Automotive Keys Investor, LLC</link:label>
    <link:label id="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember_label_en-US" xlink:label="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Automotive Keys Group, LLC and Automotive Keys Investor, LLC [Member]</link:label>
    <link:label id="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember_documentation_en-US" xlink:label="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Automotive Keys Group, LLC and Automotive Keys Investor, LLC</link:label>
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    <link:label id="lab_ecd_AllTradingArrangementsMember_terseLabel_en-US" xlink:label="lab_ecd_AllTradingArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Trading Arrangements</link:label>
    <link:label id="lab_ecd_AllTradingArrangementsMember_label_en-US" xlink:label="lab_ecd_AllTradingArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Trading Arrangements [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllTradingArrangementsMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AllTradingArrangementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllTradingArrangementsMember" xlink:to="lab_ecd_AllTradingArrangementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_e23889f0-24bd-4396-862c-9c32b6c52b6c_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in unrealized appreciation</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement"/>
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    <link:label id="lab_us-gaap_NetInvestmentIncomeAbstract_3ac11d9b-e3ee-4c3a-a7b6-8a440aa11989_terseLabel_en-US" xlink:label="lab_us-gaap_NetInvestmentIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INVESTMENT INCOME:</link:label>
    <link:label id="lab_us-gaap_NetInvestmentIncomeAbstract_label_en-US" xlink:label="lab_us-gaap_NetInvestmentIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Investment Income [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncomeAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetInvestmentIncomeAbstract"/>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_CompActuallyPaidVsNetIncomeTextBlock"/>
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    <link:label id="lab_arcc_DebtAndEquitySecuritiesRealizedGainLossMember_a59d23c9-1061-4f91-a571-9169d066940f_terseLabel_en-US" xlink:label="lab_arcc_DebtAndEquitySecuritiesRealizedGainLossMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Realized Gain (Loss)</link:label>
    <link:label id="lab_arcc_DebtAndEquitySecuritiesRealizedGainLossMember_label_en-US" xlink:label="lab_arcc_DebtAndEquitySecuritiesRealizedGainLossMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt And Equity Securities, Realized Gain (Loss) [Member]</link:label>
    <link:label id="lab_arcc_DebtAndEquitySecuritiesRealizedGainLossMember_documentation_en-US" xlink:label="lab_arcc_DebtAndEquitySecuritiesRealizedGainLossMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt And Equity Securities, Realized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtAndEquitySecuritiesRealizedGainLossMember" xlink:href="arcc-20241231.xsd#arcc_DebtAndEquitySecuritiesRealizedGainLossMember"/>
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    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_77035359-1625-45fc-bc0f-2e70e7d8e128_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Computations of Basic and Diluted Net Increase in Stockholders' Equity</link:label>
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    <link:label id="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember_4e5e8917-78f5-4788-b591-10812cc775c7_terseLabel_en-US" xlink:label="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc.</link:label>
    <link:label id="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember_label_en-US" xlink:label="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember_documentation_en-US" xlink:label="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:href="arcc-20241231.xsd#arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:to="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PaymentsOfStockIssuanceCostsPerShare_57c55c36-2dc7-499f-870d-d9d00e468850_terseLabel_en-US" xlink:label="lab_arcc_PaymentsOfStockIssuanceCostsPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underwriting fees (in dollars per share)</link:label>
    <link:label id="lab_arcc_PaymentsOfStockIssuanceCostsPerShare_label_en-US" xlink:label="lab_arcc_PaymentsOfStockIssuanceCostsPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments Of Stock Issuance Costs, Per Share</link:label>
    <link:label id="lab_arcc_PaymentsOfStockIssuanceCostsPerShare_documentation_en-US" xlink:label="lab_arcc_PaymentsOfStockIssuanceCostsPerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payments Of Stock Issuance Costs, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PaymentsOfStockIssuanceCostsPerShare" xlink:href="arcc-20241231.xsd#arcc_PaymentsOfStockIssuanceCostsPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PaymentsOfStockIssuanceCostsPerShare" xlink:to="lab_arcc_PaymentsOfStockIssuanceCostsPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember_f3b21070-a0d4-44db-8e97-7c5af4988819_terseLabel_en-US" xlink:label="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC</link:label>
    <link:label id="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:to="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember_3e6c63ad-cd30-4677-bf79-e528c2a70a7c_terseLabel_en-US" xlink:label="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rawlings Sporting Goods Company, Inc. and Easton Diamond Sports, LLC</link:label>
    <link:label id="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember_label_en-US" xlink:label="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rawlings Sporting Goods Company, Inc. and Easton Diamond Sports, LLC [Member]</link:label>
    <link:label id="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember_documentation_en-US" xlink:label="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rawlings Sporting Goods Company, Inc. and Easton Diamond Sports, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember" xlink:href="arcc-20241231.xsd#arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember" xlink:to="lab_arcc_RawlingsSportingGoodsCompanyIncAndEastonDiamondSportsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member_060679fe-465a-450d-b988-92be0099cc57_terseLabel_en-US" xlink:label="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legends Hospitality Holding Company, LLC and ASM Buyer, Inc.</link:label>
    <link:label id="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member_label_en-US" xlink:label="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legends Hospitality Holding Company, LLC and ASM Buyer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member_documentation_en-US" xlink:label="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Legends Hospitality Holding Company, LLC and ASM Buyer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member" xlink:href="arcc-20241231.xsd#arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member" xlink:to="lab_arcc_LegendsHospitalityHoldingCompanyLLCAndASMBuyerInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OtherPerfMeasureAmt_terseLabel_en-US" xlink:label="lab_ecd_OtherPerfMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Performance Measure, Amount</link:label>
    <link:label id="lab_ecd_OtherPerfMeasureAmt_label_en-US" xlink:label="lab_ecd_OtherPerfMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Performance Measure, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OtherPerfMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_OtherPerfMeasureAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OtherPerfMeasureAmt" xlink:to="lab_ecd_OtherPerfMeasureAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_d4500e12-53b4-42cd-9de6-1eb314c030ef_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_5189834a-e384-484d-a881-fbd9791daac1_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares outstanding at end of period (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding" xlink:to="lab_us-gaap_CommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_089f2736-257c-411a-a0b6-f3d849aae8e8_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares issued in connection with dividend reinvestment plan (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_3da9f0a6-4be3-4ae6-bc7c-df2f1c6986f4_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Dividend Reinvestment Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentsIncorporatedByReferenceTextBlock_88e172e8-2b2f-4f7f-9875-414fa003d058_terseLabel_en-US" xlink:label="lab_dei_DocumentsIncorporatedByReferenceTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Documents Incorporated by Reference</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentsIncorporatedByReferenceTextBlock" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentsIncorporatedByReferenceTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentsIncorporatedByReferenceTextBlock" xlink:to="lab_dei_DocumentsIncorporatedByReferenceTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NordicFerryInfrastructureASMember_330ecab0-c118-4b21-a9ef-5edf0435ecee_terseLabel_en-US" xlink:label="lab_arcc_NordicFerryInfrastructureASMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nordic Ferry Infrastructure AS</link:label>
    <link:label id="lab_arcc_NordicFerryInfrastructureASMember_label_en-US" xlink:label="lab_arcc_NordicFerryInfrastructureASMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nordic Ferry Infrastructure AS [Member]</link:label>
    <link:label id="lab_arcc_NordicFerryInfrastructureASMember_documentation_en-US" xlink:label="lab_arcc_NordicFerryInfrastructureASMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nordic Ferry Infrastructure AS</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NordicFerryInfrastructureASMember" xlink:href="arcc-20241231.xsd#arcc_NordicFerryInfrastructureASMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NordicFerryInfrastructureASMember" xlink:to="lab_arcc_NordicFerryInfrastructureASMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member_2079a053-da42-4fb5-83ae-34a9f51efb29_terseLabel_en-US" xlink:label="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PCS MidCo, Inc. and PCS Parent, L.P.</link:label>
    <link:label id="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member_label_en-US" xlink:label="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PCS MidCo, Inc. and PCS Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member_documentation_en-US" xlink:label="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PCS MidCo, Inc. and PCS Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PCSMidCoInc.AndPCSParentL.P.Member" xlink:href="arcc-20241231.xsd#arcc_PCSMidCoInc.AndPCSParentL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PCSMidCoInc.AndPCSParentL.P.Member" xlink:to="lab_arcc_PCSMidCoInc.AndPCSParentL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestReceivable_70ef8490-619c-4476-a420-05c8c9b38428_terseLabel_en-US" xlink:label="lab_us-gaap_InterestReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest receivable</link:label>
    <link:label id="lab_us-gaap_InterestReceivable_label_en-US" xlink:label="lab_us-gaap_InterestReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestReceivable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestReceivable" xlink:to="lab_us-gaap_InterestReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquitySecuritiesIndustryMember_6e3d17ba-b66f-4736-b483-06b852805c19_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesIndustryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industry Sector [Domain]</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesIndustryMember_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesIndustryMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry Sector [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesIndustryMember" xlink:to="lab_us-gaap_EquitySecuritiesIndustryMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2022AInterestRelatedDividendsMember_e377795c-ae3f-429d-b6cc-27a1dbdf9f8f_terseLabel_en-US" xlink:label="lab_arcc_O2022AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022 Interest-Related Dividends</link:label>
    <link:label id="lab_arcc_O2022AInterestRelatedDividendsMember_label_en-US" xlink:label="lab_arcc_O2022AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2022 A Interest Related Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2022AInterestRelatedDividendsMember_documentation_en-US" xlink:label="lab_arcc_O2022AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2022 A Interest Related Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2022AInterestRelatedDividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2022AInterestRelatedDividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2022AInterestRelatedDividendsMember" xlink:to="lab_arcc_O2022AInterestRelatedDividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CrosspointCapitalASSPVLPMember_e0a8fd3f-edb0-4cd4-bab3-d2e3e32e7627_terseLabel_en-US" xlink:label="lab_arcc_CrosspointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Crosspoint Capital AS SPV, LP</link:label>
    <link:label id="lab_arcc_CrosspointCapitalASSPVLPMember_label_en-US" xlink:label="lab_arcc_CrosspointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Crosspoint Capital AS SPV, LP [Member]</link:label>
    <link:label id="lab_arcc_CrosspointCapitalASSPVLPMember_documentation_en-US" xlink:label="lab_arcc_CrosspointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Crosspoint Capital AS SPV, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CrosspointCapitalASSPVLPMember" xlink:href="arcc-20241231.xsd#arcc_CrosspointCapitalASSPVLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CrosspointCapitalASSPVLPMember" xlink:to="lab_arcc_CrosspointCapitalASSPVLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_346175b1-89ed-455d-9af1-92059bb39139_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ExciseAndSalesTaxesRefunds_dc5008fc-d5f7-4481-90e1-bfe27a8ef3d4_terseLabel_en-US" xlink:label="lab_arcc_ExciseAndSalesTaxesRefunds" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Refund request for overpayment of excise taxes</link:label>
    <link:label id="lab_arcc_ExciseAndSalesTaxesRefunds_label_en-US" xlink:label="lab_arcc_ExciseAndSalesTaxesRefunds" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excise And Sales Taxes, Refunds</link:label>
    <link:label id="lab_arcc_ExciseAndSalesTaxesRefunds_documentation_en-US" xlink:label="lab_arcc_ExciseAndSalesTaxesRefunds" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Excise And Sales Taxes, Refunds</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExciseAndSalesTaxesRefunds" xlink:href="arcc-20241231.xsd#arcc_ExciseAndSalesTaxesRefunds"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember_80841f83-ac0c-4cb9-b8e5-5dd907e81583_terseLabel_en-US" xlink:label="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DRS Holdings III, Inc. and DRS Holdings I, Inc.</link:label>
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    <link:label id="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember_documentation_en-US" xlink:label="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DRS Holdings III, Inc. and DRS Holdings I, Inc.</link:label>
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    <link:label id="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember_cffbca4a-28fe-4baa-bdd6-90fe68a01789_terseLabel_en-US" xlink:label="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SelectQuote, Inc. and SQ ABS Issuer, LLC</link:label>
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    <link:label id="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock_2247858a-75db-4fa2-8324-aadac360f6e4_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INVESTMENTS</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_8f6dd6b4-3b36-4b41-a8d2-5d165f5880f2_totalLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net Proceeds</link:label>
    <link:label id="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_913ef5ee-bad5-4c65-885f-72edb8b72cec_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net Proceeds</link:label>
    <link:label id="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_label_en-US" xlink:label="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Consideration Received on Transaction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
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    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR2Member_c1d4b349-23c0-4031-9e9c-55dd621da9fa_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, EUR 2</link:label>
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    <link:label id="lab_us-gaap_IntersegmentEliminationMember_2b8c02ce-9dc9-4ca5-a3fb-90aec6771f75_terseLabel_en-US" xlink:label="lab_us-gaap_IntersegmentEliminationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Eliminations</link:label>
    <link:label id="lab_us-gaap_IntersegmentEliminationMember_label_en-US" xlink:label="lab_us-gaap_IntersegmentEliminationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intersegment Eliminations [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntersegmentEliminationMember" xlink:to="lab_us-gaap_IntersegmentEliminationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MRISoftwareLLCMember_30c1e4ea-465c-4628-adc5-b4954c1913a0_terseLabel_en-US" xlink:label="lab_arcc_MRISoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MRI Software LLC</link:label>
    <link:label id="lab_arcc_MRISoftwareLLCMember_label_en-US" xlink:label="lab_arcc_MRISoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MRI Software LLC [Member]</link:label>
    <link:label id="lab_arcc_MRISoftwareLLCMember_documentation_en-US" xlink:label="lab_arcc_MRISoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MRI Software LLC</link:label>
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    <link:label id="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember_0bbf8ea3-1d64-4cf5-a2ac-07a7266fb1d3_terseLabel_en-US" xlink:label="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Arrowhead Holdco Company and Arrowhead GS Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Arrowhead Holdco Company and Arrowhead GS Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:to="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GuidepointSecurityHoldingsLLCMember_df091822-6594-49ad-9463-20037d3024b7_terseLabel_en-US" xlink:label="lab_arcc_GuidepointSecurityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Guidepoint Security Holdings, LLC</link:label>
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    <link:label id="lab_arcc_GuidepointSecurityHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_GuidepointSecurityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Guidepoint Security Holdings, LLC</link:label>
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    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_2b3820b7-62cc-4f40-ad57-edc29e2de230_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis" xlink:to="lab_us-gaap_StatementEquityComponentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember_40b8887f-7289-42a4-a9ee-42f660e06ae2_terseLabel_en-US" xlink:label="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC</link:label>
    <link:label id="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:to="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorSubordinatedLoansMember_907208e2-bdf8-49db-80cc-a771fb683580_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorSubordinatedLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior subordinated loans</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorSubordinatedLoansMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SeniorSubordinatedLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorSubordinatedLoansMember" xlink:to="lab_us-gaap_SeniorSubordinatedLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember_label_en-US" xlink:label="lab_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Global Economic, Political And Market Conditions [Member]</link:label>
    <link:label id="lab_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Global Economic, Political And Market Conditions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember" xlink:to="lab_arcc_RiskOfGlobalEconomicPoliticalAndMarketConditionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember_779ab978-eb98-4305-b327-400306d47563_terseLabel_en-US" xlink:label="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">VPROP Operating, LLC and V SandCo, LLC</link:label>
    <link:label id="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember_label_en-US" xlink:label="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">VPROP Operating, LLC and V SandCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember_documentation_en-US" xlink:label="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">VPROP Operating, LLC and V SandCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:href="arcc-20241231.xsd#arcc_VPROPOperatingLLCAndVSandCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:to="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember_00f38f4d-e36e-485e-a1a3-1de7fc0aa2fe_terseLabel_en-US" xlink:label="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SOC Telemed, Inc. and PSC Spark Holdings, LP</link:label>
    <link:label id="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember_label_en-US" xlink:label="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SOC Telemed, Inc. and PSC Spark Holdings, LP [Member]</link:label>
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    <link:label id="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember_aa38bc03-f26c-43b1-9087-fcf126f9fab4_terseLabel_en-US" xlink:label="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EP Purchaser, LLC and TPG VIII EP Co-Invest II, L.P.</link:label>
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    <link:label id="lab_arcc_ContinentalCafeLLCAndInfinityOvationYachtChartersLLCMember_06db5c08-ff7c-47a5-87b3-2cf085f16c0a_terseLabel_en-US" xlink:label="lab_arcc_ContinentalCafeLLCAndInfinityOvationYachtChartersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Continental Cafe, LLC and Infinity Ovation Yacht Charters, LLC</link:label>
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    <link:label id="lab_arcc_ContinentalCafeLLCAndInfinityOvationYachtChartersLLCMember_documentation_en-US" xlink:label="lab_arcc_ContinentalCafeLLCAndInfinityOvationYachtChartersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Continental Cafe, LLC and Infinity Ovation Yacht Charters, LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ContinentalCafeLLCAndInfinityOvationYachtChartersLLCMember" xlink:to="lab_arcc_ContinentalCafeLLCAndInfinityOvationYachtChartersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_WeightedAverageMember_d3ff4cee-c3c2-4c0d-82dc-ad59822aea33_terseLabel_en-US" xlink:label="lab_srt_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average</link:label>
    <link:label id="lab_srt_WeightedAverageMember_label_en-US" xlink:label="lab_srt_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_WeightedAverageMember" xlink:to="lab_srt_WeightedAverageMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table</link:label>
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    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember_ff738ee2-a55b-49f9-94d3-3a7c89741f59_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Advisory and Management Agreement</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount_63764080-71f7-4f48-8823-cb4abc22189a_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: commitments substantially at discretion of the Company</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount_ff8c448b-e386-4551-839c-ece0d2d6f439_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: equity commitments substantially at discretion of the Company</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee, Discretionary, Amount</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:to="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList_e49348d9-f8bf-42b1-b0a8-75fc0aff2404_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset, Counterparty Name [Extensible Enumeration]</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Counterparty Name [Extensible Enumeration]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeAssetCounterpartyNameExtensibleList"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:to="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfMarketPriceFluctuationsMember_label_en-US" xlink:label="lab_arcc_RiskOfMarketPriceFluctuationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Market Price Fluctuations [Member]</link:label>
    <link:label id="lab_arcc_RiskOfMarketPriceFluctuationsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfMarketPriceFluctuationsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Market Price Fluctuations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfMarketPriceFluctuationsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfMarketPriceFluctuationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfMarketPriceFluctuationsMember" xlink:to="lab_arcc_RiskOfMarketPriceFluctuationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember_7d7adcc4-11e4-4479-918f-ee0e5c5ad646_terseLabel_en-US" xlink:label="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Enverus Holdings, Inc. and Titan DI Preferred Holdings, Inc.</link:label>
    <link:label id="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember_label_en-US" xlink:label="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Enverus Holdings, Inc. and Titan DI Preferred Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Enverus Holdings, Inc. and Titan DI Preferred Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember" xlink:to="lab_arcc_EnverusHoldingsIncAndTitanDIPreferredHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_2f1da189-5608-40e9-b86e-009796d58b82_terseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PIK dividend income</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_15ad0b70-f60b-4899-b5a2-680eda174824_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">PIK dividends</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_2a4d83be-4119-44a7-b826-bfe364cc6662_verboseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividend income not taxable until collected</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_label_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating, Paid in Kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeOperatingPaidInKind" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendIncomeOperatingPaidInKind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendIncomeOperatingPaidInKind" xlink:to="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearOne_d76e813d-ad69-45f3-ae3c-aa3d0643c7b3_terseLabel_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount, year one</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearOne_label_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year One</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearOne_documentation_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:href="arcc-20241231.xsd#arcc_LettersOfCreditOutstandingAmountYearOne"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:to="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember_76a5b3d9-aec7-49c6-bd93-98a01ab6d0c8_terseLabel_en-US" xlink:label="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Laboratories Bidco LLC and Laboratories Topco LLC</link:label>
    <link:label id="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember_label_en-US" xlink:label="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Laboratories Bidco LLC and Laboratories Topco LLC [Member]</link:label>
    <link:label id="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Laboratories Bidco LLC and Laboratories Topco LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:href="arcc-20241231.xsd#arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:to="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_7662e282-a28a-4d83-833b-da5bcb66f1a5_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD</link:label>
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_a5596aa9-903b-4310-8e69-29d4febf1a68_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_1fbbb624-e630-4457-954a-aac376b3d716_terseLabel_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average stated interest rate</link:label>
    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_label_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Weighted Average Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtWeightedAverageInterestRate" xlink:to="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_ec2c53c2-acb7-4998-92ef-fb062e1813b0_terseLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax cost basis</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:to="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HealthEdgeSoftwareIncMember_1fd0d334-c6e3-4a46-8b2b-52b8cc61e5a6_terseLabel_en-US" xlink:label="lab_arcc_HealthEdgeSoftwareIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HealthEdge Software, Inc.</link:label>
    <link:label id="lab_arcc_HealthEdgeSoftwareIncMember_label_en-US" xlink:label="lab_arcc_HealthEdgeSoftwareIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HealthEdge Software, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HealthEdgeSoftwareIncMember_documentation_en-US" xlink:label="lab_arcc_HealthEdgeSoftwareIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HealthEdge Software, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HealthEdgeSoftwareIncMember" xlink:href="arcc-20241231.xsd#arcc_HealthEdgeSoftwareIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HealthEdgeSoftwareIncMember" xlink:to="lab_arcc_HealthEdgeSoftwareIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member_fd29700c-5222-486f-8303-cef52e4cb5c0_terseLabel_en-US" xlink:label="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Eclipse Topco, Inc., Eclipse Investor Parent, L.P. and Eclipse Buyer, Inc.</link:label>
    <link:label id="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member_label_en-US" xlink:label="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eclipse Topco, Inc., Eclipse Investor Parent, L.P. and Eclipse Buyer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member_documentation_en-US" xlink:label="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eclipse Topco, Inc., Eclipse Investor Parent, L.P. and Eclipse Buyer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:href="arcc-20241231.xsd#arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:to="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_d67133fa-8e3e-4c94-b0d2-8f06f809753d_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net accretion of discount on investments</link:label>
    <link:label id="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_label_en-US" xlink:label="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accretion (Amortization) of Discounts and Premiums, Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember_d82e490e-33e1-4e12-8869-de50a9e33015_terseLabel_en-US" xlink:label="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Project Essential Bidco, Inc. and Project Essential Super Parent, Inc.</link:label>
    <link:label id="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember_label_en-US" xlink:label="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Project Essential Bidco, Inc. and Project Essential Super Parent, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember_documentation_en-US" xlink:label="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Project Essential Bidco, Inc. and Project Essential Super Parent, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember" xlink:href="arcc-20241231.xsd#arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember" xlink:to="lab_arcc_ProjectEssentialBidcoIncAndProjectEssentialSuperParentIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyDeemedContributionPerShare_cfa6028d-a259-44e5-bd3e-6407618cc53f_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDeemedContributionPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deemed contribution from Ares Capital Management (in dollars per share)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDeemedContributionPerShare_label_en-US" xlink:label="lab_arcc_InvestmentCompanyDeemedContributionPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Deemed Contribution, Per Share</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDeemedContributionPerShare_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyDeemedContributionPerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Deemed Contribution, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDeemedContributionPerShare" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyDeemedContributionPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyDeemedContributionPerShare" xlink:to="lab_arcc_InvestmentCompanyDeemedContributionPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsAxis_930b8b3d-08d2-43bd-a851-4e353abe7949_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:label id="lab_srt_ConsolidationItemsAxis_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis" xlink:to="lab_srt_ConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_93a77c24-b858-4320-99b2-fde699b0cbef_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments</link:label>
    <link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_label_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:to="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_HealthcareSectorMember_fe929e63-50b1-4a3d-ae64-b2854f48b900_terseLabel_en-US" xlink:label="lab_us-gaap_HealthcareSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Health Care Equipment and Services</link:label>
    <link:label id="lab_us-gaap_HealthcareSectorMember_label_en-US" xlink:label="lab_us-gaap_HealthcareSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Healthcare Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HealthcareSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HealthcareSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HealthcareSectorMember" xlink:to="lab_us-gaap_HealthcareSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome_03207c9a-3628-427e-bc92-ee0d8ab1f167_terseLabel_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income for tax but not book</link:label>
    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome_label_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis Reconciliation, Income Taxable, Increase (Decrease) In Taxable Income</link:label>
    <link:label id="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome_documentation_en-US" xlink:label="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis Reconciliation, Income Taxable, Increase (Decrease) In Taxable Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome" xlink:href="arcc-20241231.xsd#arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome" xlink:to="lab_arcc_InvestmentTaxBasisReconciliationIncomeTaxableIncreaseDecreaseInTaxableIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember_78b457c6-ab44-4d94-b57b-76d78e6c9111_terseLabel_en-US" xlink:label="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GPM Investments, LLC and ARKO Corp.</link:label>
    <link:label id="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember_label_en-US" xlink:label="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GPM Investments, LLC and ARKO Corp. [Member]</link:label>
    <link:label id="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember_documentation_en-US" xlink:label="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GPM Investments, LLC and ARKO Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GPMInvestmentsLLCAndARKOCorpMember" xlink:href="arcc-20241231.xsd#arcc_GPMInvestmentsLLCAndARKOCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GPMInvestmentsLLCAndARKOCorpMember" xlink:to="lab_arcc_GPMInvestmentsLLCAndARKOCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_7ad25e49-c506-4bcc-b4fb-36805797b945_terseLabel_en-US" xlink:label="lab_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value result effective hedging relationship, increase (decrease)</link:label>
    <link:label id="lab_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_label_en-US" xlink:label="lab_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:to="lab_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Disqualification of Tax Benefits, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Disqualification of Tax Benefits, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:to="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2023AInterestRelatedDividendsMember_e909c3ea-875d-4e40-92f5-e4c4b1c2729e_terseLabel_en-US" xlink:label="lab_arcc_O2023AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023 Interest-Related Dividends</link:label>
    <link:label id="lab_arcc_O2023AInterestRelatedDividendsMember_label_en-US" xlink:label="lab_arcc_O2023AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2023 A Interest Related Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2023AInterestRelatedDividendsMember_documentation_en-US" xlink:label="lab_arcc_O2023AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2023 A Interest Related Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2023AInterestRelatedDividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2023AInterestRelatedDividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2023AInterestRelatedDividendsMember" xlink:to="lab_arcc_O2023AInterestRelatedDividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ECapitalFinanceCorpMember_e2206f8d-2bd0-465e-bcaf-7b2d27b0e0a3_terseLabel_en-US" xlink:label="lab_arcc_ECapitalFinanceCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">eCapital Finance Corp.</link:label>
    <link:label id="lab_arcc_ECapitalFinanceCorpMember_label_en-US" xlink:label="lab_arcc_ECapitalFinanceCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">eCapital Finance Corp. [Member]</link:label>
    <link:label id="lab_arcc_ECapitalFinanceCorpMember_documentation_en-US" xlink:label="lab_arcc_ECapitalFinanceCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">eCapital Finance Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ECapitalFinanceCorpMember" xlink:href="arcc-20241231.xsd#arcc_ECapitalFinanceCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ECapitalFinanceCorpMember" xlink:to="lab_arcc_ECapitalFinanceCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CommunityBrandsParentCoLLCMember_656c5628-f809-482e-9cd5-37f780f01abc_terseLabel_en-US" xlink:label="lab_arcc_CommunityBrandsParentCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Community Brands ParentCo, LLC</link:label>
    <link:label id="lab_arcc_CommunityBrandsParentCoLLCMember_label_en-US" xlink:label="lab_arcc_CommunityBrandsParentCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Community Brands ParentCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_CommunityBrandsParentCoLLCMember_documentation_en-US" xlink:label="lab_arcc_CommunityBrandsParentCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Community Brands ParentCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CommunityBrandsParentCoLLCMember" xlink:href="arcc-20241231.xsd#arcc_CommunityBrandsParentCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CommunityBrandsParentCoLLCMember" xlink:to="lab_arcc_CommunityBrandsParentCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember_0559547f-3a4b-41fe-aa8a-001f58eff27e_terseLabel_en-US" xlink:label="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc.</link:label>
    <link:label id="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember_label_en-US" xlink:label="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember_documentation_en-US" xlink:label="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember" xlink:href="arcc-20241231.xsd#arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember" xlink:to="lab_arcc_CobaltBuyerSubIncCobaltHoldingsILPAndCobaltIntermediateIIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PDDSHoldCoIncMember_22000de6-b837-48e0-8699-67e2592db69b_terseLabel_en-US" xlink:label="lab_arcc_PDDSHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PDDS HoldCo, Inc.</link:label>
    <link:label id="lab_arcc_PDDSHoldCoIncMember_label_en-US" xlink:label="lab_arcc_PDDSHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PDDS HoldCo, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PDDSHoldCoIncMember_documentation_en-US" xlink:label="lab_arcc_PDDSHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PDDS HoldCo, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PDDSHoldCoIncMember" xlink:href="arcc-20241231.xsd#arcc_PDDSHoldCoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PDDSHoldCoIncMember" xlink:to="lab_arcc_PDDSHoldCoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_b77fb150-9068-4595-87f3-0bca46a42d73_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName" xlink:to="lab_dei_SecurityExchangeName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember_label_en-US" xlink:label="lab_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Decline In Market Prices In Corporate Debt Markets [Member]</link:label>
    <link:label id="lab_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Decline In Market Prices In Corporate Debt Markets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember" xlink:to="lab_arcc_RiskOfDeclineInMarketPricesInCorporateDebtMarketsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_bd8f34e0-662b-468b-9ae1-b57eff933aa4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate spread</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Basis Spread on Variable Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaidInKindInterest_2711dba4-2e13-4248-90a4-c1116858fe9d_terseLabel_en-US" xlink:label="lab_us-gaap_PaidInKindInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collections of PIK interest</link:label>
    <link:label id="lab_us-gaap_PaidInKindInterest_label_en-US" xlink:label="lab_us-gaap_PaidInKindInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Paid-in-Kind Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaidInKindInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaidInKindInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaidInKindInterest" xlink:to="lab_us-gaap_PaidInKindInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HylandSoftwareInc.Member_55664903-1d57-4c09-a494-8ba53c492853_terseLabel_en-US" xlink:label="lab_arcc_HylandSoftwareInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hyland Software, Inc.</link:label>
    <link:label id="lab_arcc_HylandSoftwareInc.Member_label_en-US" xlink:label="lab_arcc_HylandSoftwareInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hyland Software, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HylandSoftwareInc.Member_documentation_en-US" xlink:label="lab_arcc_HylandSoftwareInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hyland Software, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HylandSoftwareInc.Member" xlink:href="arcc-20241231.xsd#arcc_HylandSoftwareInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HylandSoftwareInc.Member" xlink:to="lab_arcc_HylandSoftwareInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_130ec048-ab83-4f05-9b84-347781661baa_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain" xlink:to="lab_us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancialServicesSectorMember_c379cd24-1477-4bfa-b2c9-ebeb0de7413f_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialServicesSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Services</link:label>
    <link:label id="lab_us-gaap_FinancialServicesSectorMember_label_en-US" xlink:label="lab_us-gaap_FinancialServicesSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Services Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServicesSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialServicesSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialServicesSectorMember" xlink:to="lab_us-gaap_FinancialServicesSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember_b4feee47-fa81-4a07-abe1-0b9166d898e2_terseLabel_en-US" xlink:label="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LJP Purchaser, Inc. and LJP Topco, LP</link:label>
    <link:label id="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember_label_en-US" xlink:label="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LJP Purchaser, Inc. and LJP Topco, LP [Member]</link:label>
    <link:label id="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LJP Purchaser, Inc. and LJP Topco, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:href="arcc-20241231.xsd#arcc_LJPPurchaserIncAndLJPTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:to="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember_46d74b00-51a6-466f-96ab-8652161c2b93_terseLabel_en-US" xlink:label="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">eResearch Technology, Inc. and Astorg VII Co-Invest ERT</link:label>
    <link:label id="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember_label_en-US" xlink:label="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">eResearch Technology, Inc. and Astorg VII Co-Invest ERT [Member]</link:label>
    <link:label id="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember_documentation_en-US" xlink:label="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">eResearch Technology, Inc. and Astorg VII Co-Invest ERT</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:href="arcc-20241231.xsd#arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:to="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember_210f331e-9418-4fda-8f1d-9856e11dea3f_terseLabel_en-US" xlink:label="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC</link:label>
    <link:label id="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember_label_en-US" xlink:label="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC [Member]</link:label>
    <link:label id="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember_documentation_en-US" xlink:label="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember" xlink:href="arcc-20241231.xsd#arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember" xlink:to="lab_arcc_HighlineAftermarketAcquisitionLLCHighlineAftermarketSCAcquisitionIncAndHighlinePPCBlockerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_0cfe31a3-bc56-427b-a82f-db075bcfd546_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Interest receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accrued Interest Receivable, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:to="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FoundationRiskPartnersCorpMember_11bb9644-f30a-4810-955e-4222a35e45c5_terseLabel_en-US" xlink:label="lab_arcc_FoundationRiskPartnersCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foundation Risk Partners, Corp.</link:label>
    <link:label id="lab_arcc_FoundationRiskPartnersCorpMember_label_en-US" xlink:label="lab_arcc_FoundationRiskPartnersCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foundation Risk Partners, Corp. [Member]</link:label>
    <link:label id="lab_arcc_FoundationRiskPartnersCorpMember_documentation_en-US" xlink:label="lab_arcc_FoundationRiskPartnersCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foundation Risk Partners, Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FoundationRiskPartnersCorpMember" xlink:href="arcc-20241231.xsd#arcc_FoundationRiskPartnersCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FoundationRiskPartnersCorpMember" xlink:to="lab_arcc_FoundationRiskPartnersCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedBalancePercentOfShares_75282b6d-5501-4ae4-859f-cac0fecccd72_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedBalancePercentOfShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares (as a percent)</link:label>
    <link:label id="lab_arcc_InvestmentOwnedBalancePercentOfShares_label_en-US" xlink:label="lab_arcc_InvestmentOwnedBalancePercentOfShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Balance, Percent Of Shares</link:label>
    <link:label id="lab_arcc_InvestmentOwnedBalancePercentOfShares_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedBalancePercentOfShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Balance, Percent Of Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedBalancePercentOfShares" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedBalancePercentOfShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedBalancePercentOfShares" xlink:to="lab_arcc_InvestmentOwnedBalancePercentOfShares" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember_label_en-US" xlink:label="lab_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Credit Ratings Not Reflecting All Risks [Member]</link:label>
    <link:label id="lab_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember_documentation_en-US" xlink:label="lab_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Credit Ratings Not Reflecting All Risks</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfCreditRatingsNotReflectingAllRisksMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember" xlink:to="lab_arcc_RiskOfCreditRatingsNotReflectingAllRisksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember_4eacfd3c-37a3-4a8f-995f-82a45ef45a60_terseLabel_en-US" xlink:label="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP</link:label>
    <link:label id="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember_label_en-US" xlink:label="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember" xlink:to="lab_arcc_VarsityBrandsHoldingCoIncAndBCPEHerculesHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationDomain_a080cc36-53fb-4754-b169-14808314b3b3_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationDomain_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerAffiliationDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIssuerAffiliationDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="lab_us-gaap_InvestmentIssuerAffiliationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RetainedEarningsAccumulatedNetUnrealizedGainsMember_9fc7795d-1c99-454e-a0a2-5a6e8d2edce8_terseLabel_en-US" xlink:label="lab_arcc_RetainedEarningsAccumulatedNetUnrealizedGainsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained Earnings, Accumulated Net Unrealized Gains</link:label>
    <link:label id="lab_arcc_RetainedEarningsAccumulatedNetUnrealizedGainsMember_label_en-US" xlink:label="lab_arcc_RetainedEarningsAccumulatedNetUnrealizedGainsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings, Accumulated Net Unrealized Gains [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_RetainedEarningsAccumulatedNetUnrealizedGainsMember" xlink:href="arcc-20241231.xsd#arcc_RetainedEarningsAccumulatedNetUnrealizedGainsMember"/>
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    <link:label id="lab_arcc_PatriotGrowthInsuranceServicesLLCMember_a1ef1071-4358-4eb4-9725-b6c8b7dd8c69_terseLabel_en-US" xlink:label="lab_arcc_PatriotGrowthInsuranceServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Patriot Growth Insurance Services, LLC</link:label>
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    <link:label id="lab_arcc_ZBHoldcoLLCZBParentLLCMember_82020aed-6b23-4afc-8ac3-57e3b7bbeee6_terseLabel_en-US" xlink:label="lab_arcc_ZBHoldcoLLCZBParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ZB Holdco LLC &amp; ZB Parent LLC</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_30d0b917-f92f-4a93-ad37-0c3dbad6d0f7_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Aggregate Principal Amount Committed/ Outstanding</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLiabilities"/>
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    <link:label id="lab_arcc_EPSNASSParentIncMember_documentation_en-US" xlink:label="lab_arcc_EPSNASSParentIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EPS NASS Parent, Inc.</link:label>
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    <link:label id="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember_98c8df13-dca7-4725-ba14-b032b8c0298d_terseLabel_en-US" xlink:label="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp</link:label>
    <link:label id="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember_label_en-US" xlink:label="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp [Member]</link:label>
    <link:label id="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember_documentation_en-US" xlink:label="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp</link:label>
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    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_71cb36ed-10e3-4108-8a3f-cc57ab9e90c4_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares authorized (in shares)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized" xlink:to="lab_us-gaap_CommonStockSharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProductionResourceGroupLLCAndPRGIIILLCMember_909a7c3d-ab04-4f85-9ff4-29345a290eda_terseLabel_en-US" xlink:label="lab_arcc_ProductionResourceGroupLLCAndPRGIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Production Resource Group, L.L.C. and PRG III, LLC</link:label>
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    <link:label id="lab_arcc_ProductionResourceGroupLLCAndPRGIIILLCMember_documentation_en-US" xlink:label="lab_arcc_ProductionResourceGroupLLCAndPRGIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Production Resource Group, L.L.C. and PRG III, LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProductionResourceGroupLLCAndPRGIIILLCMember" xlink:to="lab_arcc_ProductionResourceGroupLLCAndPRGIIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember_5a944884-a245-4d90-83de-ed7d313100b6_terseLabel_en-US" xlink:label="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FS Squared Holding Corp. and FS Squared, LLC</link:label>
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    <link:label id="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember_documentation_en-US" xlink:label="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FS Squared Holding Corp. and FS Squared, LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:to="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_7c9ebbd4-8a25-43f4-87a4-ed52a84fddb2_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liability, Notional Amount</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilityNotionalAmount" xlink:to="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HuskiesParentIncGIInsurityParentLLCAndGIInsurityTopcoLPMember_1959f545-da9d-439a-84cb-fa8f002a1c1e_terseLabel_en-US" xlink:label="lab_arcc_HuskiesParentIncGIInsurityParentLLCAndGIInsurityTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Huskies Parent, Inc., GI Insurity Parent LLC, and GI Insurity Topco LP</link:label>
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    <link:label id="lab_dei_EntityVoluntaryFilers_5795f727-5666-42a8-aad9-e8d1e00f23c0_terseLabel_en-US" xlink:label="lab_dei_EntityVoluntaryFilers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Voluntary Filers</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_ff146dec-94f5-46c4-a649-e4b0d3a658ab_totalLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total (in dollars per share)</link:label>
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    <link:label id="lab_arcc_ClassBCLONotesMember_4b8265be-ffc8-4567-a912-73c4b2c47e0d_terseLabel_en-US" xlink:label="lab_arcc_ClassBCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class B CLO Notes</link:label>
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    <link:label id="lab_arcc_ArgenbrightHoldingsVLLCAndAmberstoneSecurityGroupLimitedMember_cf9add5f-8096-4fb4-98fa-5f087266edb0_terseLabel_en-US" xlink:label="lab_arcc_ArgenbrightHoldingsVLLCAndAmberstoneSecurityGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Argenbright Holdings V, LLC and Amberstone Security Group Limited</link:label>
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    <link:label id="lab_us-gaap_HedgingDesignationDomain_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Designation [Domain]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationDomain" xlink:to="lab_us-gaap_HedgingDesignationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_4ff29648-db16-4789-852d-a15fc11d63b5_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position Location, Balance [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis" xlink:to="lab_us-gaap_BalanceSheetLocationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember_62e7974f-2a5b-482f-9e4f-dcf6e0b38bee_terseLabel_en-US" xlink:label="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">W.S. Connelly &amp; Co., LLC and WSC Ultimate Holdings, LLC</link:label>
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    <link:label id="lab_us-gaap_InvestmentIssuerNameAxis_638b3c0e-1f2e-4db7-9da0-d1004e2727c6_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Name [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerNameAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerNameAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIssuerNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerNameAxis" xlink:to="lab_us-gaap_InvestmentIssuerNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember_7b189bd0-bed4-459c-9996-4051cfa6207f_terseLabel_en-US" xlink:label="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC</link:label>
    <link:label id="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember_label_en-US" xlink:label="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC [Member]</link:label>
    <link:label id="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember_documentation_en-US" xlink:label="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:href="arcc-20241231.xsd#arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:to="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember_ba6d69d0-2563-4642-b7d9-7446c25d89a4_terseLabel_en-US" xlink:label="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Murchison Oil and Gas, LLC and Murchison Holdings, LLC</link:label>
    <link:label id="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Murchison Oil and Gas, LLC and Murchison Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Murchison Oil and Gas, LLC and Murchison Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember" xlink:to="lab_arcc_MurchisonOilAndGasLLCAndMurchisonHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WellingtonAltusFinancialInc.Member_4f4e1f42-b5bc-4ef4-b5de-80fe45499615_terseLabel_en-US" xlink:label="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wellington-Altus Financial Inc.</link:label>
    <link:label id="lab_arcc_WellingtonAltusFinancialInc.Member_label_en-US" xlink:label="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wellington-Altus Financial Inc. [Member]</link:label>
    <link:label id="lab_arcc_WellingtonAltusFinancialInc.Member_documentation_en-US" xlink:label="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wellington-Altus Financial Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WellingtonAltusFinancialInc.Member" xlink:href="arcc-20241231.xsd#arcc_WellingtonAltusFinancialInc.Member"/>
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    <link:label id="lab_arcc_GalwayBorrowerLLCMember_653c75f6-fb5b-44fd-8159-fea5ee8b90bb_terseLabel_en-US" xlink:label="lab_arcc_GalwayBorrowerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Galway Borrower LLC</link:label>
    <link:label id="lab_arcc_GalwayBorrowerLLCMember_label_en-US" xlink:label="lab_arcc_GalwayBorrowerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Galway Borrower LLC [Member]</link:label>
    <link:label id="lab_arcc_GalwayBorrowerLLCMember_documentation_en-US" xlink:label="lab_arcc_GalwayBorrowerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Galway Borrower LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GalwayBorrowerLLCMember" xlink:href="arcc-20241231.xsd#arcc_GalwayBorrowerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GalwayBorrowerLLCMember" xlink:to="lab_arcc_GalwayBorrowerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubordinatedDebt_1315d84f-5631-4a3e-b652-d089ff2404c8_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated notes</link:label>
    <link:label id="lab_us-gaap_SubordinatedDebt_label_en-US" xlink:label="lab_us-gaap_SubordinatedDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubordinatedDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebt" xlink:to="lab_us-gaap_SubordinatedDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentConvertibleConversionPrice1_6110bc8e-f83e-4aae-9748-db4cefa2c6f5_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conversion price (in usd per share)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentConvertibleConversionPrice1_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Convertible, Conversion Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="lab_us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member_e94f8e36-ac57-46a0-b8b4-3f07ac63e666_terseLabel_en-US" xlink:label="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Creek Parent, Inc. and Creek Feeder, L.P.</link:label>
    <link:label id="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member_label_en-US" xlink:label="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Creek Parent, Inc. and Creek Feeder, L.P. [Member]</link:label>
    <link:label id="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member_documentation_en-US" xlink:label="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Creek Parent, Inc. and Creek Feeder, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:href="arcc-20241231.xsd#arcc_CreekParentInc.AndCreekFeederL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:to="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebt_ddaf9e4d-3dd0-497a-884b-0c345c132008_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_ac7ce320-ddf9-4277-925b-6c1dd1a01bc7_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Carrying Value</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_label_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt" xlink:to="lab_us-gaap_LongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PnsnAdjsPrrSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension Adjustments Prior Service Cost</link:label>
    <link:label id="lab_ecd_PnsnAdjsPrrSvcCstMember_label_en-US" xlink:label="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Adjustments Prior Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PnsnAdjsPrrSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:to="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_July2026NotesMember_17855917-c052-4bb9-9bba-1051135dd851_verboseLabel_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">July 2026 Notes</link:label>
    <link:label id="lab_arcc_July2026NotesMember_3864decb-ab05-4f8b-b6cf-1f8310b7c6fe_terseLabel_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2026 Notes (principal amount outstanding of $1,000)</link:label>
    <link:label id="lab_arcc_July2026NotesMember_label_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2026 Notes [Member]</link:label>
    <link:label id="lab_arcc_July2026NotesMember_documentation_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2026 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2026NotesMember" xlink:href="arcc-20241231.xsd#arcc_July2026NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_July2026NotesMember" xlink:to="lab_arcc_July2026NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock_f71baa9d-31d6-4366-b927-b0eff32b0e1f_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividends Paid per Common Share</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock_label_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution To Shareholders [Table Text Block]</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution To Shareholders</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock" xlink:to="lab_arcc_InvestmentCompanyDistributionToShareholdersTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember_25858e7b-26e0-49fa-954f-7b2c5aa7440e_terseLabel_en-US" xlink:label="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Drogon Bidco Inc. &amp; Drogon Aggregator LP</link:label>
    <link:label id="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember_label_en-US" xlink:label="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Drogon Bidco Inc. &amp; Drogon Aggregator LP [Member]</link:label>
    <link:label id="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember_documentation_en-US" xlink:label="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Drogon Bidco Inc. &amp; Drogon Aggregator LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:href="arcc-20241231.xsd#arcc_DrogonBidcoInc.DrogonAggregatorLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:to="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KNPCHoldCoLLCMember_5595695b-ce3d-4e5b-9295-bb66fbc343fe_terseLabel_en-US" xlink:label="lab_arcc_KNPCHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">KNPC HoldCo, LLC</link:label>
    <link:label id="lab_arcc_KNPCHoldCoLLCMember_label_en-US" xlink:label="lab_arcc_KNPCHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">KNPC HoldCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_KNPCHoldCoLLCMember_documentation_en-US" xlink:label="lab_arcc_KNPCHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">KNPC HoldCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KNPCHoldCoLLCMember" xlink:href="arcc-20241231.xsd#arcc_KNPCHoldCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KNPCHoldCoLLCMember" xlink:to="lab_arcc_KNPCHoldCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember_57646858-98b7-4d47-94d2-d19b389c5a41_terseLabel_en-US" xlink:label="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC</link:label>
    <link:label id="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember_label_en-US" xlink:label="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember_documentation_en-US" xlink:label="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember" xlink:href="arcc-20241231.xsd#arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember" xlink:to="lab_arcc_PegasusGlobalEnterpriseHoldingsLLCMekoneBlockerAcquisitionIncAndMekoneParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_3f8480c5-8041-4b73-85c8-defc3b8ed8ec_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Selected Financial Information</link:label>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_label_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScheduleOfCondensedFinancialStatementsTableTextBlock"/>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TotalShareholderRtnVsPeerGroupTextBlock"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
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    <link:label id="lab_dei_DocumentAnnualReport_7fa178ae-2006-4c93-ac4a-1d41e8194690_terseLabel_en-US" xlink:label="lab_dei_DocumentAnnualReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Annual Report</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyDividendDistribution_91a09b36-0a6b-44f4-87ae-36b21eff24ff_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDividendDistribution" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Dividends declared and payable</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDividendDistribution" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyDividendDistribution"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyDividendDistribution" xlink:to="lab_us-gaap_InvestmentCompanyDividendDistribution" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitments_00752995-2e09-4264-b4e5-1ad2591c30e6_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total net unfunded revolving and delayed draw loan commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitments_e6d03a83-32cf-48b1-8b28-45538811f90f_totalLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitments" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total net unfunded revolving and delayed draw loan commitments</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyNetAdjustedUnfundedCommitments" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyNetAdjustedUnfundedCommitments"/>
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    <link:label id="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomeDividendIncomePerShare_3005021f-9976-4454-b4c5-c3b87714bf47_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributionOrdinaryIncomeDividendIncomePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend income per share (in dollars per share)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDistributionOrdinaryIncomeDividendIncomePerShare" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyDistributionOrdinaryIncomeDividendIncomePerShare"/>
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    <link:label id="lab_us-gaap_NonUsMember_aff64bf1-13a9-45f3-b47c-12452926d150_terseLabel_en-US" xlink:label="lab_us-gaap_NonUsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">International</link:label>
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    <link:label id="lab_us-gaap_AccountingPoliciesAbstract_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Policies [Abstract]</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesAbstract_782f2a53-d963-47cb-aef7-aac2856036d0_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_29e46cac-cd5e-4eb5-aa56-6a0b6cc55cf2_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="lab_us-gaap_LiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenuesAbstract_b886d36b-d64c-4919-a3bc-1082782f89b7_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:label id="lab_us-gaap_RevenuesAbstract_label_en-US" xlink:label="lab_us-gaap_RevenuesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesAbstract"/>
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    <link:label id="lab_arcc_AppliedTechnicalServicesLLCMember_9c333c3d-e9f9-466e-8bb8-9798ee2a515a_terseLabel_en-US" xlink:label="lab_arcc_AppliedTechnicalServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Applied Technical Services, LLC</link:label>
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    <link:label id="lab_arcc_AppliedTechnicalServicesLLCMember_documentation_en-US" xlink:label="lab_arcc_AppliedTechnicalServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Applied Technical Services, LLC</link:label>
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    <link:label id="lab_arcc_InterestRateSwap1Member_8ac0585d-b0de-4e74-ad10-870125214e03_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap 1</link:label>
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    <link:label id="lab_arcc_InterestRateSwap1Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 1</link:label>
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    <link:label id="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember_861513e8-4250-4cc9-9590-72a579a98d3b_terseLabel_en-US" xlink:label="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit_49aa3503-bd46-4dbc-9970-05ac395aa338_verboseLabel_en-US" xlink:label="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Borrowing capacity increase under line of credit</link:label>
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    <link:label id="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit_documentation_en-US" xlink:label="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line Of Credit Facility, Accordion Feature, Increase Limit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:href="arcc-20241231.xsd#arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
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    <link:label id="lab_dei_CurrentFiscalYearEndDate_12691659-bd58-4f72-b554-efb4f1308671_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CurrentFiscalYearEndDate"/>
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    <link:label id="lab_arcc_RetainedEarningsAccumulatedUndistributedNetInvestmentIncomeMember_b2662eb7-31a2-4820-a27e-aa2f88bc8d26_terseLabel_en-US" xlink:label="lab_arcc_RetainedEarningsAccumulatedUndistributedNetInvestmentIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained Earnings, Accumulated Undistributed Net Investment Income</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_RetainedEarningsAccumulatedUndistributedNetInvestmentIncomeMember" xlink:href="arcc-20241231.xsd#arcc_RetainedEarningsAccumulatedUndistributedNetInvestmentIncomeMember"/>
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    <link:label id="lab_arcc_ProjectRubyUltimateParentCorpMember_d25bec0a-aa8b-46ba-a9ad-17014cd94f18_terseLabel_en-US" xlink:label="lab_arcc_ProjectRubyUltimateParentCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Project Ruby Ultimate Parent Corp.</link:label>
    <link:label id="lab_arcc_ProjectRubyUltimateParentCorpMember_label_en-US" xlink:label="lab_arcc_ProjectRubyUltimateParentCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Project Ruby Ultimate Parent Corp. [Member]</link:label>
    <link:label id="lab_arcc_ProjectRubyUltimateParentCorpMember_documentation_en-US" xlink:label="lab_arcc_ProjectRubyUltimateParentCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Project Ruby Ultimate Parent Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProjectRubyUltimateParentCorpMember" xlink:href="arcc-20241231.xsd#arcc_ProjectRubyUltimateParentCorpMember"/>
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    <link:label id="lab_ecd_PeoName_terseLabel_en-US" xlink:label="lab_ecd_PeoName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Name</link:label>
    <link:label id="lab_ecd_PeoName_label_en-US" xlink:label="lab_ecd_PeoName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoName" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_PeoName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoName" xlink:to="lab_ecd_PeoName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TAWEGHoldingsLLCMember_2e8171f9-6e30-44bf-b82b-674b3cc4288c_terseLabel_en-US" xlink:label="lab_arcc_TAWEGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TA/WEG Holdings, LLC</link:label>
    <link:label id="lab_arcc_TAWEGHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_TAWEGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TA/WEG Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_TAWEGHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_TAWEGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TA/WEG Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TAWEGHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_TAWEGHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TAWEGHoldingsLLCMember" xlink:to="lab_arcc_TAWEGHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member_a3ab1c14-83a7-4ab1-8be4-009f40383cc9_terseLabel_en-US" xlink:label="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Storm Investment S.a.r.l. and Atletico Holdco, S.L.</link:label>
    <link:label id="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member_label_en-US" xlink:label="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Storm Investment S.a.r.l. and Atletico Holdco, S.L. [Member]</link:label>
    <link:label id="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member_documentation_en-US" xlink:label="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Storm Investment S.a.r.l. and Atletico Holdco, S.L.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member" xlink:href="arcc-20241231.xsd#arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member" xlink:to="lab_arcc_StormInvestmentS.a.r.l.AndAtleticoHoldcoS.L.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Award Types</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease_fa3df0a4-0da2-40b3-adc3-7b55c98682b0_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax reclassification of stockholders&#8217; equity in accordance with GAAP</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease_e3fdf74d-0307-4b1b-936e-4b78ac7597cd_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Tax reclassification of stockholders' equity, increase (decreased)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Tax Reclassification, Increase (Decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:to="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2023M2DividendsMember_13141357-0276-443d-a4d0-d7b1a34763c8_terseLabel_en-US" xlink:label="lab_arcc_O2023M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 7, 2023</link:label>
    <link:label id="lab_arcc_O2023M2DividendsMember_label_en-US" xlink:label="lab_arcc_O2023M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2023 M2 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2023M2DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2023M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, February Seventh Two Thousand Twenty Three O 2023 M2 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2023M2DividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2023M2DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2023M2DividendsMember" xlink:to="lab_arcc_O2023M2DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_October2036CLOSecuredLoansMember_c7ddf082-d291-4106-8937-c82573717f3a_terseLabel_en-US" xlink:label="lab_arcc_October2036CLOSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 2036 CLO Secured Loans</link:label>
    <link:label id="lab_arcc_October2036CLOSecuredLoansMember_label_en-US" xlink:label="lab_arcc_October2036CLOSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">October 2036 CLO Secured Loans [Member]</link:label>
    <link:label id="lab_arcc_October2036CLOSecuredLoansMember_documentation_en-US" xlink:label="lab_arcc_October2036CLOSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 CLO Secured Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_October2036CLOSecuredLoansMember" xlink:href="arcc-20241231.xsd#arcc_October2036CLOSecuredLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_October2036CLOSecuredLoansMember" xlink:to="lab_arcc_October2036CLOSecuredLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Company Selected Measure</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Company Selected Measure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoMember_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO</link:label>
    <link:label id="lab_ecd_NonPeoNeoMember_label_en-US" xlink:label="lab_ecd_NonPeoNeoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_NonPeoNeoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoMember" xlink:to="lab_ecd_NonPeoNeoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember_bf53d61f-9b95-48fe-b2de-87ae134c82b4_terseLabel_en-US" xlink:label="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inszone Mid, LLC and INSZ Holdings, LLC</link:label>
    <link:label id="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inszone Mid, LLC and INSZ Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Inszone Mid, LLC and INSZ Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_InszoneMidLLCAndINSZHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:to="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_b9175231-5bff-4242-a33d-ecd1805953b4_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital in Excess of Par Value</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BGIPurchaserInc.Member_b8772d96-67ba-425a-a354-e7dbc2f614f5_terseLabel_en-US" xlink:label="lab_arcc_BGIPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BGI Purchaser, Inc.</link:label>
    <link:label id="lab_arcc_BGIPurchaserInc.Member_label_en-US" xlink:label="lab_arcc_BGIPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BGI Purchaser, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BGIPurchaserInc.Member_documentation_en-US" xlink:label="lab_arcc_BGIPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BGI Purchaser, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BGIPurchaserInc.Member" xlink:href="arcc-20241231.xsd#arcc_BGIPurchaserInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BGIPurchaserInc.Member" xlink:to="lab_arcc_BGIPurchaserInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VeristaInc.Member_b0ace66a-5eb0-4923-bbf8-26bf1a5af8af_terseLabel_en-US" xlink:label="lab_arcc_VeristaInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Verista, Inc.</link:label>
    <link:label id="lab_arcc_VeristaInc.Member_label_en-US" xlink:label="lab_arcc_VeristaInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Verista, Inc. [Member]</link:label>
    <link:label id="lab_arcc_VeristaInc.Member_documentation_en-US" xlink:label="lab_arcc_VeristaInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Verista, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VeristaInc.Member" xlink:href="arcc-20241231.xsd#arcc_VeristaInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VeristaInc.Member" xlink:to="lab_arcc_VeristaInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OTGManagementLLCMember_f441ac37-329f-4dd8-92e4-7c90731c8b1f_terseLabel_en-US" xlink:label="lab_arcc_OTGManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OTG Management, LLC</link:label>
    <link:label id="lab_arcc_OTGManagementLLCMember_label_en-US" xlink:label="lab_arcc_OTGManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OTG Management, LLC [Member]</link:label>
    <link:label id="lab_arcc_OTGManagementLLCMember_documentation_en-US" xlink:label="lab_arcc_OTGManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OTG Management, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OTGManagementLLCMember" xlink:href="arcc-20241231.xsd#arcc_OTGManagementLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OTGManagementLLCMember" xlink:to="lab_arcc_OTGManagementLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyPerShareDataAbstract_20d6240b-966d-4956-acb8-f6c018184f44_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per Share Data:</link:label>
    <link:label id="lab_arcc_InvestmentCompanyPerShareDataAbstract_label_en-US" xlink:label="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Per Share Data [Abstract]</link:label>
    <link:label id="lab_arcc_InvestmentCompanyPerShareDataAbstract_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Per Share Data</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyPerShareDataAbstract" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyPerShareDataAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyPerShareDataAbstract" xlink:to="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember_d704e577-d997-4c1e-adae-d57e51e06fb5_terseLabel_en-US" xlink:label="lab_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SHO Holding I Corporation, Shoes For Crews (Europe) Limited and Never Slip TopCo, Inc.</link:label>
    <link:label id="lab_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember_label_en-US" xlink:label="lab_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SHO Holding I Corporation, Shoes For Crews (Europe) Limited and Never Slip TopCo, Inc. [Member]</link:label>
    <link:label id="lab_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember_documentation_en-US" xlink:label="lab_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SHO Holding I Corporation, Shoes For Crews (Europe) Limited and Never Slip TopCo, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember" xlink:href="arcc-20241231.xsd#arcc_SHOHoldingICorporationShoesForCrewsEuropeLimitedAndNeverSlipTopCoIncMember"/>
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    <link:label id="lab_dei_EntityInteractiveDataCurrent_40643e60-d7ea-4b17-a239-83f17d45d197_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_f6d9aee2-35be-464a-8a02-c4fba03bdad4_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total net adjusted unfunded loan commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_e14e4f8d-80c1-47f3-847e-581208287cbc_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total unfunded capital commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_f029e679-c084-46e4-9026-fdeb26dd5a78_totalLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total unfunded equity commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_6cc90e32-e638-48f7-aba0-f765a39b07ee_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unfunded revolving and delayed draw loan commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:to="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember_b1c2e3e4-c62b-4673-8c91-5f7403b96a47_terseLabel_en-US" xlink:label="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stealth Holding LLC and UCIT Online Security Inc.</link:label>
    <link:label id="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember_label_en-US" xlink:label="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stealth Holding LLC and UCIT Online Security Inc. [Member]</link:label>
    <link:label id="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember_documentation_en-US" xlink:label="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Stealth Holding LLC and UCIT Online Security Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember" xlink:href="arcc-20241231.xsd#arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember" xlink:to="lab_arcc_StealthHoldingLLCAndUCITOnlineSecurityIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FlinnScientificIncAndWCIQuantumHoldingsIncMember_3052d04e-fe17-445c-8f8b-d1f4ac478734_terseLabel_en-US" xlink:label="lab_arcc_FlinnScientificIncAndWCIQuantumHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc.</link:label>
    <link:label id="lab_arcc_FlinnScientificIncAndWCIQuantumHoldingsIncMember_label_en-US" xlink:label="lab_arcc_FlinnScientificIncAndWCIQuantumHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_FlinnScientificIncAndWCIQuantumHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_FlinnScientificIncAndWCIQuantumHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_CradleLuxBidcoS.A.R.L.Member_d407301f-de4b-418b-84ec-7556c23fe189_terseLabel_en-US" xlink:label="lab_arcc_CradleLuxBidcoS.A.R.L.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cradle Lux Bidco S.A.R.L.</link:label>
    <link:label id="lab_arcc_CradleLuxBidcoS.A.R.L.Member_label_en-US" xlink:label="lab_arcc_CradleLuxBidcoS.A.R.L.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cradle Lux Bidco S.A.R.L. [Member]</link:label>
    <link:label id="lab_arcc_CradleLuxBidcoS.A.R.L.Member_documentation_en-US" xlink:label="lab_arcc_CradleLuxBidcoS.A.R.L.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cradle Lux Bidco S.A.R.L.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CradleLuxBidcoS.A.R.L.Member" xlink:href="arcc-20241231.xsd#arcc_CradleLuxBidcoS.A.R.L.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CradleLuxBidcoS.A.R.L.Member" xlink:to="lab_arcc_CradleLuxBidcoS.A.R.L.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember_57f6f13a-aedf-4254-9127-c30d8214ab08_terseLabel_en-US" xlink:label="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amerivet Partners Management, Inc. and AVE Holdings LP</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_fc37a646-490d-48ca-919b-fffd35e0ad28_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Measurements of Cash and Cash Equivalents, Restricted Cash, Investments, Derivatives, and Unfunded Revolving and Delayed Draw Loan Commitments</link:label>
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    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_2dc031da-b91f-4498-ac0d-aa79f4bbc23c_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency and other transactions</link:label>
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    <link:label id="lab_arcc_PrecinmacUSHoldingsIncTrimasterManufacturingIncAndBladeGroupHoldingsLPMember_c58ef794-04cc-4707-8577-32a9bd8eff45_terseLabel_en-US" xlink:label="lab_arcc_PrecinmacUSHoldingsIncTrimasterManufacturingIncAndBladeGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Precinmac (US) Holdings Inc., Trimaster Manufacturing Inc. and Blade Group Holdings, LP.</link:label>
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    <link:label id="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_a3c831b7-5831-4fa5-88a9-1d76dc65ae23_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments measured at net asset value</link:label>
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    <link:label id="lab_arcc_ComputerServicesInc.Member_336ecc9f-c4e2-430c-99a7-1734a25f55f1_terseLabel_en-US" xlink:label="lab_arcc_ComputerServicesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Computer Services, Inc.</link:label>
    <link:label id="lab_arcc_ComputerServicesInc.Member_label_en-US" xlink:label="lab_arcc_ComputerServicesInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Computer Services, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ComputerServicesInc.Member_documentation_en-US" xlink:label="lab_arcc_ComputerServicesInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Computer Services, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ComputerServicesInc.Member" xlink:href="arcc-20241231.xsd#arcc_ComputerServicesInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ComputerServicesInc.Member" xlink:to="lab_arcc_ComputerServicesInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LifeStylesBidcoLtdLifestylesIntermediateHoldcoLtdAndLifeStylesParentLPMember_3e9cf392-530c-497c-b9db-d7cfdd0511c1_terseLabel_en-US" xlink:label="lab_arcc_LifeStylesBidcoLtdLifestylesIntermediateHoldcoLtdAndLifeStylesParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LifeStyles Bidco Ltd., Lifestyles Intermediate Holdco Ltd. and LifeStyles Parent, L.P.</link:label>
    <link:label id="lab_arcc_LifeStylesBidcoLtdLifestylesIntermediateHoldcoLtdAndLifeStylesParentLPMember_label_en-US" xlink:label="lab_arcc_LifeStylesBidcoLtdLifestylesIntermediateHoldcoLtdAndLifeStylesParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LifeStyles Bidco Ltd., Lifestyles Intermediate Holdco Ltd. and LifeStyles Parent, L.P. [Member]</link:label>
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    <link:label id="lab_arcc_DividendConcentrationRiskMember_219d1e79-634f-4a82-b05f-882eb6499aff_terseLabel_en-US" xlink:label="lab_arcc_DividendConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend Concentration Risk</link:label>
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    <link:label id="lab_arcc_DividendConcentrationRiskMember_documentation_en-US" xlink:label="lab_arcc_DividendConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Concentration Risk</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_a838b224-4029-421b-b21d-d39fab09db96_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities and stockholders&#8217; equity</link:label>
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    <link:label id="lab_arcc_PYEBarkerFireSafetyLLCMember_7659f8ef-cd3c-46e9-8a3a-7bb322aa064e_terseLabel_en-US" xlink:label="lab_arcc_PYEBarkerFireSafetyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PYE-Barker Fire &amp; Safety, LLC</link:label>
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    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_c21e6a9d-9a6c-48da-a488-306a435b0ce8_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
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    <link:label id="lab_arcc_O2022M23DividendsMember_aa25b1b6-e8d2-4474-9a6e-d2b2b59d880a_terseLabel_en-US" xlink:label="lab_arcc_O2022M23DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 9, 2022</link:label>
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    <link:label id="lab_us-gaap_HedgingDesignationAxis_5ef32a72-f8f1-403f-9476-d8a778aadb31_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Designation [Axis]</link:label>
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    <link:label id="lab_arcc_MonicaHoldcoUSIncMember_c5ead4e9-a09d-4cbf-a60a-500d6d7009f0_terseLabel_en-US" xlink:label="lab_arcc_MonicaHoldcoUSIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Monica Holdco (US) Inc.</link:label>
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    <link:label id="lab_us-gaap_EnergySectorMember_fc826dae-e68a-4b2d-b02b-5967ddfb3cec_terseLabel_en-US" xlink:label="lab_us-gaap_EnergySectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare_ff3af7d7-8f53-466c-a2e0-bdad2035d587_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances of common stock (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyMarketValuePerShare_d6016153-b8c0-4612-87da-cb6fe944b909_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyMarketValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per share market value at end of period (in dollars per share)</link:label>
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    <link:label id="lab_arcc_WCIBXCPurchaserLLCAndWCIBXCInvestmentHoldingsL.P.Member_53ea2a7e-0904-4a52-8a0c-7deb8da67f16_terseLabel_en-US" xlink:label="lab_arcc_WCIBXCPurchaserLLCAndWCIBXCInvestmentHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WCI-BXC Purchaser, LLC and WCI-BXC Investment Holdings, L.P.</link:label>
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    <link:label id="lab_arcc_KBHSAcquisitionLLCDbaAlitaCareLLCMember_e6164e52-b57c-4fb0-a8f6-a78de6f0ac51_terseLabel_en-US" xlink:label="lab_arcc_KBHSAcquisitionLLCDbaAlitaCareLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">KBHS Acquisition, LLC (d/b/a Alita Care, LLC)</link:label>
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    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_f57dedf0-e4d4-479e-a7a4-a15cee3c3350_terseLabel_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses):</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesByIndustryAxis"/>
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    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_3450aab8-a5b5-4f72-9bc4-600944ecbe62_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeAxis"/>
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    <link:label id="lab_arcc_InvestmentOwnedPercentOfTotalAssets_c5c87725-79d8-428f-bf73-163c2f77af9b_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">% of Total Assets</link:label>
    <link:label id="lab_arcc_InvestmentOwnedPercentOfTotalAssets_label_en-US" xlink:label="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Percent Of Total Assets</link:label>
    <link:label id="lab_arcc_InvestmentOwnedPercentOfTotalAssets_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Percent Of Total Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedPercentOfTotalAssets"/>
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    <link:label id="lab_ecd_IndividualAxis_terseLabel_en-US" xlink:label="lab_ecd_IndividualAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Individual:</link:label>
    <link:label id="lab_ecd_IndividualAxis_label_en-US" xlink:label="lab_ecd_IndividualAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Individual [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_IndividualAxis"/>
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    <link:label id="lab_arcc_ViperBidcoInc.Member_7235b619-46c5-4a8a-b34d-7f01def8eb1a_terseLabel_en-US" xlink:label="lab_arcc_ViperBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Viper Bidco, Inc.</link:label>
    <link:label id="lab_arcc_ViperBidcoInc.Member_label_en-US" xlink:label="lab_arcc_ViperBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Viper Bidco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ViperBidcoInc.Member_documentation_en-US" xlink:label="lab_arcc_ViperBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Viper Bidco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ViperBidcoInc.Member" xlink:href="arcc-20241231.xsd#arcc_ViperBidcoInc.Member"/>
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    <link:label id="lab_arcc_LeagueOneVolleyballInc.Member_d7a19e55-3107-4636-9ccb-4eaf40796e3c_terseLabel_en-US" xlink:label="lab_arcc_LeagueOneVolleyballInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">League One Volleyball, Inc.</link:label>
    <link:label id="lab_arcc_LeagueOneVolleyballInc.Member_label_en-US" xlink:label="lab_arcc_LeagueOneVolleyballInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">League One Volleyball, Inc. [Member]</link:label>
    <link:label id="lab_arcc_LeagueOneVolleyballInc.Member_documentation_en-US" xlink:label="lab_arcc_LeagueOneVolleyballInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">League One Volleyball, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LeagueOneVolleyballInc.Member" xlink:href="arcc-20241231.xsd#arcc_LeagueOneVolleyballInc.Member"/>
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    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember_3bd59d52-d1fd-408c-979c-e9c47b4def52_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Quarterly Catch-Up Threshold</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Catch-Up Threshold [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:href="arcc-20241231.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember"/>
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    <link:label id="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock_414df827-ba89-44cf-835e-204d8e8e4487_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Derivative Instruments</link:label>
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    <link:label id="lab_arcc_FitnessVenturesHoldingsInc.AndMeaningfulPartnersFitnessVenturesCoInvestmentLPMember_a0cbe5bf-72be-470c-a56c-7092aef370b0_terseLabel_en-US" xlink:label="lab_arcc_FitnessVenturesHoldingsInc.AndMeaningfulPartnersFitnessVenturesCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fitness Ventures Holdings, Inc. and Meaningful Partners Fitness Ventures Co-Investment LP</link:label>
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    <link:label id="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember_490b5ee8-c144-4be3-bdf1-d8b42493f89b_terseLabel_en-US" xlink:label="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunk Rock Foundry Partners LP, Hatteras Electrical Manufacturing Holding Company and Sigma Electric Manufacturing Corporation</link:label>
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    <link:label id="lab_us-gaap_OperatingExpensesAbstract_bccfdf97-17a6-4fd3-889e-4f78aa8acdc1_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EXPENSES:</link:label>
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    <link:label id="lab_arcc_TransportationMember_4d086671-8e75-4ba0-aea7-c7d2506de7c9_terseLabel_en-US" xlink:label="lab_arcc_TransportationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transportation</link:label>
    <link:label id="lab_arcc_TransportationMember_label_en-US" xlink:label="lab_arcc_TransportationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transportation [Member]</link:label>
    <link:label id="lab_arcc_TransportationMember_documentation_en-US" xlink:label="lab_arcc_TransportationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transportation</link:label>
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    <link:label id="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember_affb5995-ae3d-4593-bd59-281cb09f7496_terseLabel_en-US" xlink:label="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CMG HoldCo, LLC and CMG Buyer Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_RiskOfInflationMember_label_en-US" xlink:label="lab_arcc_RiskOfInflationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Inflation [Member]</link:label>
    <link:label id="lab_arcc_RiskOfInflationMember_documentation_en-US" xlink:label="lab_arcc_RiskOfInflationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Inflation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfInflationMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfInflationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfInflationMember" xlink:to="lab_arcc_RiskOfInflationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MinimumMember_38d74c44-4be7-4733-bbc1-bd571bc63868_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember" xlink:to="lab_srt_MinimumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFixedInterestRate_19899276-cb38-4dba-b25f-6e1e1030240b_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFixedInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Receives</link:label>
    <link:label id="lab_us-gaap_DerivativeFixedInterestRate_label_en-US" xlink:label="lab_us-gaap_DerivativeFixedInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Fixed Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFixedInterestRate" xlink:to="lab_us-gaap_DerivativeFixedInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember_f9ff8305-3766-4c39-b269-0b4920b3f819_terseLabel_en-US" xlink:label="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC</link:label>
    <link:label id="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember_label_en-US" xlink:label="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC [Member]</link:label>
    <link:label id="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember_documentation_en-US" xlink:label="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:href="arcc-20241231.xsd#arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:to="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ValuationTechniqueYieldAnalysisMember_f9620d81-e218-44a6-8163-c04b46a36b81_terseLabel_en-US" xlink:label="lab_arcc_ValuationTechniqueYieldAnalysisMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Yield analysis</link:label>
    <link:label id="lab_arcc_ValuationTechniqueYieldAnalysisMember_label_en-US" xlink:label="lab_arcc_ValuationTechniqueYieldAnalysisMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Technique, Yield Analysis [Member]</link:label>
    <link:label id="lab_arcc_ValuationTechniqueYieldAnalysisMember_documentation_en-US" xlink:label="lab_arcc_ValuationTechniqueYieldAnalysisMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Valuation Technique, Yield Analysis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ValuationTechniqueYieldAnalysisMember" xlink:href="arcc-20241231.xsd#arcc_ValuationTechniqueYieldAnalysisMember"/>
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    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember_8f4e97f5-29b7-47b3-9819-00003363ed45_terseLabel_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC and KBS TopCo, LLC</link:label>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember_label_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC and KBS TopCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember_documentation_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC and KBS TopCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:href="arcc-20241231.xsd#arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:to="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrAdoptionDate_terseLabel_en-US" xlink:label="lab_ecd_TrdArrAdoptionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adoption Date</link:label>
    <link:label id="lab_ecd_TrdArrAdoptionDate_label_en-US" xlink:label="lab_ecd_TrdArrAdoptionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Adoption Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrAdoptionDate" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TrdArrAdoptionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrAdoptionDate" xlink:to="lab_ecd_TrdArrAdoptionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsAbstract_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract" xlink:to="lab_us-gaap_RelatedPartyTransactionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AutomobilesAndComponentsSectorMember_fa0ffdf2-2b1c-4a71-9c66-ae5c29f907d0_terseLabel_en-US" xlink:label="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automobiles and Components</link:label>
    <link:label id="lab_arcc_AutomobilesAndComponentsSectorMember_label_en-US" xlink:label="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Automobiles And Components Sector [Member]</link:label>
    <link:label id="lab_arcc_AutomobilesAndComponentsSectorMember_documentation_en-US" xlink:label="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Automobiles And Components Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AutomobilesAndComponentsSectorMember" xlink:href="arcc-20241231.xsd#arcc_AutomobilesAndComponentsSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AutomobilesAndComponentsSectorMember" xlink:to="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WSHPFCAcquisitionLLCMember_613f5fe7-93d1-4243-9a2f-35d51273f5ff_terseLabel_en-US" xlink:label="lab_arcc_WSHPFCAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WSHP FC Acquisition LLC</link:label>
    <link:label id="lab_arcc_WSHPFCAcquisitionLLCMember_label_en-US" xlink:label="lab_arcc_WSHPFCAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WSHP FC Acquisition LLC [Member]</link:label>
    <link:label id="lab_arcc_WSHPFCAcquisitionLLCMember_documentation_en-US" xlink:label="lab_arcc_WSHPFCAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WSHP FC Acquisition LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WSHPFCAcquisitionLLCMember" xlink:href="arcc-20241231.xsd#arcc_WSHPFCAcquisitionLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WSHPFCAcquisitionLLCMember" xlink:to="lab_arcc_WSHPFCAcquisitionLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfExposureToHedgingTransactionsMember_label_en-US" xlink:label="lab_arcc_RiskOfExposureToHedgingTransactionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Exposure To Hedging Transactions [Member]</link:label>
    <link:label id="lab_arcc_RiskOfExposureToHedgingTransactionsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfExposureToHedgingTransactionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Exposure To Hedging Transactions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfExposureToHedgingTransactionsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfExposureToHedgingTransactionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfExposureToHedgingTransactionsMember" xlink:to="lab_arcc_RiskOfExposureToHedgingTransactionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember_bbacc2ee-d433-4619-9705-27d37a89cafc_terseLabel_en-US" xlink:label="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">City Line Distributors LLC and City Line Investments LLC</link:label>
    <link:label id="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember_label_en-US" xlink:label="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">City Line Distributors LLC and City Line Investments LLC [Member]</link:label>
    <link:label id="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember_documentation_en-US" xlink:label="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">City Line Distributors LLC and City Line Investments LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember" xlink:href="arcc-20241231.xsd#arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember" xlink:to="lab_arcc_CityLineDistributorsLLCAndCityLineInvestmentsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerServicesMember_86260a2f-513a-4f68-a7ad-c90f452bbeb6_terseLabel_en-US" xlink:label="lab_arcc_ConsumerServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Services</link:label>
    <link:label id="lab_arcc_ConsumerServicesMember_label_en-US" xlink:label="lab_arcc_ConsumerServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Services [Member]</link:label>
    <link:label id="lab_arcc_ConsumerServicesMember_documentation_en-US" xlink:label="lab_arcc_ConsumerServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerServicesMember" xlink:href="arcc-20241231.xsd#arcc_ConsumerServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsumerServicesMember" xlink:to="lab_arcc_ConsumerServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfObligationToPayInvestmentAdvisorIfLossesIncurredMember_label_en-US" xlink:label="lab_arcc_RiskOfObligationToPayInvestmentAdvisorIfLossesIncurredMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Obligation To Pay Investment Advisor If Losses Incurred [Member]</link:label>
    <link:label id="lab_arcc_RiskOfObligationToPayInvestmentAdvisorIfLossesIncurredMember_documentation_en-US" xlink:label="lab_arcc_RiskOfObligationToPayInvestmentAdvisorIfLossesIncurredMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Obligation To Pay Investment Advisor If Losses Incurred</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfObligationToPayInvestmentAdvisorIfLossesIncurredMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfObligationToPayInvestmentAdvisorIfLossesIncurredMember"/>
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    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_b6e7c894-b3fe-4d29-8d67-ad095180976e_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:to="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SaleOfStockAvailableForIssuanceAmount_06e39334-b4fb-4c68-a972-f84ce9e1817a_terseLabel_en-US" xlink:label="lab_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock available for issuance</link:label>
    <link:label id="lab_arcc_SaleOfStockAvailableForIssuanceAmount_label_en-US" xlink:label="lab_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale Of Stock, Available For Issuance, Amount</link:label>
    <link:label id="lab_arcc_SaleOfStockAvailableForIssuanceAmount_documentation_en-US" xlink:label="lab_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sale Of Stock, Available For Issuance, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:href="arcc-20241231.xsd#arcc_SaleOfStockAvailableForIssuanceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:to="lab_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember_170aac10-17e9-4e05-92bb-66482b7b0f87_terseLabel_en-US" xlink:label="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AHR Funding Holdings, Inc. And AHR Parent Holdings, L.P.</link:label>
    <link:label id="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AHR Funding Holdings, Inc. And AHR Parent Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AHR Funding Holdings, Inc. And AHR Parent Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:to="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_3786996f-2593-42dd-9f9f-a1114fb9b7fd_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember_5dbe0d0e-ffac-409c-aecb-19c3ee587d58_terseLabel_en-US" xlink:label="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pathway Vet Alliance LLC and Jedi Group Holdings LLC</link:label>
    <link:label id="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pathway Vet Alliance LLC and Jedi Group Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pathway Vet Alliance LLC and Jedi Group Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:to="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_2a14012e-ee94-4488-9bd7-904849f11bbc_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principal amount of debt outstanding</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_03ab0206-8799-49bf-a0c9-2763075ae217_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Principal Amount Outstanding</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardExrcPrice_terseLabel_en-US" xlink:label="lab_ecd_AwardExrcPrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercise Price</link:label>
    <link:label id="lab_ecd_AwardExrcPrice_label_en-US" xlink:label="lab_ecd_AwardExrcPrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Exercise Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardExrcPrice" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardExrcPrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardExrcPrice" xlink:to="lab_ecd_AwardExrcPrice" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember_14b7a3e1-4612-485a-9f30-04de3aff5a8d_terseLabel_en-US" xlink:label="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P.</link:label>
    <link:label id="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember_label_en-US" xlink:label="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember_documentation_en-US" xlink:label="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember" xlink:href="arcc-20241231.xsd#arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember" xlink:to="lab_arcc_BalrogAcquisitionIncBalrogTopcoIncAndBalrogParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WestRegionMember_336cd344-004d-4578-b3f7-a3367282ddcf_terseLabel_en-US" xlink:label="lab_us-gaap_WestRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">West</link:label>
    <link:label id="lab_us-gaap_WestRegionMember_label_en-US" xlink:label="lab_us-gaap_WestRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US West Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WestRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WestRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WestRegionMember" xlink:to="lab_us-gaap_WestRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrDuration_terseLabel_en-US" xlink:label="lab_ecd_TrdArrDuration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Arrangement Duration</link:label>
    <link:label id="lab_ecd_TrdArrDuration_label_en-US" xlink:label="lab_ecd_TrdArrDuration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Duration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrDuration" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_TrdArrDuration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrDuration" xlink:to="lab_ecd_TrdArrDuration" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember_d800b3f5-00db-4afa-8dcc-827f99289863_terseLabel_en-US" xlink:label="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P.</link:label>
    <link:label id="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember_label_en-US" xlink:label="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:to="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerDistributionAndRetailMember_3e773e39-51c5-4779-8ded-72b2df2fe2d1_terseLabel_en-US" xlink:label="lab_arcc_ConsumerDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Distribution and Retail</link:label>
    <link:label id="lab_arcc_ConsumerDistributionAndRetailMember_label_en-US" xlink:label="lab_arcc_ConsumerDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Distribution And Retail [Member]</link:label>
    <link:label id="lab_arcc_ConsumerDistributionAndRetailMember_documentation_en-US" xlink:label="lab_arcc_ConsumerDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Distribution And Retail</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerDistributionAndRetailMember" xlink:href="arcc-20241231.xsd#arcc_ConsumerDistributionAndRetailMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsumerDistributionAndRetailMember" xlink:to="lab_arcc_ConsumerDistributionAndRetailMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember_fe5aabde-7fb8-4b35-a709-a2618a262a68_terseLabel_en-US" xlink:label="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bragg Live Food Products, LLC and SPC Investment Co., L.P.</link:label>
    <link:label id="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember_label_en-US" xlink:label="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bragg Live Food Products, LLC and SPC Investment Co., L.P. [Member]</link:label>
    <link:label id="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember_documentation_en-US" xlink:label="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bragg Live Food Products, LLC and SPC Investment Co., L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember" xlink:href="arcc-20241231.xsd#arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember" xlink:to="lab_arcc_BraggLiveFoodProductsLLCAndSPCInvestmentCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_42a3061d-3c9d-4cf7-a48a-a37842ffc6fb_terseLabel_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses):</link:label>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_label_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Realized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtAndEquitySecuritiesRealizedGainLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:to="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_5ac9da00-7c15-4576-9e01-c41ed8c91bb7_terseLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate gross unrealized gain for federal tax purposes</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Unrealized Gain</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:to="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_a8437bd2-8584-48ca-bbeb-98ff1c7c44c3_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">STOCKHOLDERS&#8217; EQUITY</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity, Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract" xlink:to="lab_us-gaap_StockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_SubsidiariesMember_e7e1054f-da75-4dfb-b201-3b1d0c4418f1_terseLabel_en-US" xlink:label="lab_srt_SubsidiariesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsidiaries</link:label>
    <link:label id="lab_srt_SubsidiariesMember_label_en-US" xlink:label="lab_srt_SubsidiariesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsidiaries [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SubsidiariesMember" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SubsidiariesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SubsidiariesMember" xlink:to="lab_srt_SubsidiariesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember_label_en-US" xlink:label="lab_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Portfolio Companies Incurring Debt Or Equity [Member]</link:label>
    <link:label id="lab_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember_documentation_en-US" xlink:label="lab_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Portfolio Companies Incurring Debt Or Equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember" xlink:to="lab_arcc_RiskOfPortfolioCompaniesIncurringDebtOrEquityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_October2036ClassACLOLoansMember_00307470-89da-414e-9104-b8cb491f9dac_terseLabel_en-US" xlink:label="lab_arcc_October2036ClassACLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 2036 Class A CLO Loans</link:label>
    <link:label id="lab_arcc_October2036ClassACLOLoansMember_label_en-US" xlink:label="lab_arcc_October2036ClassACLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">October 2036 Class A CLO Loans [Member]</link:label>
    <link:label id="lab_arcc_October2036ClassACLOLoansMember_documentation_en-US" xlink:label="lab_arcc_October2036ClassACLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 Class A CLO Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_October2036ClassACLOLoansMember" xlink:href="arcc-20241231.xsd#arcc_October2036ClassACLOLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_October2036ClassACLOLoansMember" xlink:to="lab_arcc_October2036ClassACLOLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MtrlTermsOfTrdArrTextBlock_terseLabel_en-US" xlink:label="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Material Terms of Trading Arrangement</link:label>
    <link:label id="lab_ecd_MtrlTermsOfTrdArrTextBlock_label_en-US" xlink:label="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Material Terms of Trading Arrangement [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_MtrlTermsOfTrdArrTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:to="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_f466bb92-86f7-43eb-a8d6-e57e1f3a310a_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term of debt instrument</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentTerm" xlink:to="lab_us-gaap_DebtInstrumentTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment_e2119b2e-155e-43ad-b32f-df922c761c64_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount available for commitment</link:label>
    <link:label id="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment_label_en-US" xlink:label="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Maximum Amount Available For Commitment</link:label>
    <link:label id="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Maximum Amount Available For Commitment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedMaximumAmountAvailableForCommitment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment" xlink:to="lab_arcc_InvestmentOwnedMaximumAmountAvailableForCommitment" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember_56ee0e59-5894-4d8f-b642-71799f5c8a2b_terseLabel_en-US" xlink:label="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EpiServer Inc. and Episerver Sweden Holdings AB</link:label>
    <link:label id="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember_label_en-US" xlink:label="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EpiServer Inc. and Episerver Sweden Holdings AB [Member]</link:label>
    <link:label id="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember_documentation_en-US" xlink:label="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EpiServer Inc. and Episerver Sweden Holdings AB</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember" xlink:href="arcc-20241231.xsd#arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember" xlink:to="lab_arcc_EpiServerIncAndEpiserverSwedenHoldingsABMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfAbilityToRaiseCapitalMember_label_en-US" xlink:label="lab_arcc_RiskOfAbilityToRaiseCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Ability To Raise Capital [Member]</link:label>
    <link:label id="lab_arcc_RiskOfAbilityToRaiseCapitalMember_documentation_en-US" xlink:label="lab_arcc_RiskOfAbilityToRaiseCapitalMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Ability To Raise Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfAbilityToRaiseCapitalMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfAbilityToRaiseCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfAbilityToRaiseCapitalMember" xlink:to="lab_arcc_RiskOfAbilityToRaiseCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FoodAndBeverageSectorMember_e832438b-a970-483e-bf8d-45322ad5f162_terseLabel_en-US" xlink:label="lab_us-gaap_FoodAndBeverageSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Food and Beverage</link:label>
    <link:label id="lab_us-gaap_FoodAndBeverageSectorMember_label_en-US" xlink:label="lab_us-gaap_FoodAndBeverageSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Food and Beverage Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FoodAndBeverageSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FoodAndBeverageSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FoodAndBeverageSectorMember" xlink:to="lab_us-gaap_FoodAndBeverageSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember_468d31c8-1cff-403b-8c4d-fa1d8290047c_terseLabel_en-US" xlink:label="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PestCo Holdings, LLC and PestCo, LLC</link:label>
    <link:label id="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember_label_en-US" xlink:label="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PestCo Holdings, LLC and PestCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember_documentation_en-US" xlink:label="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PestCo Holdings, LLC and PestCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:href="arcc-20241231.xsd#arcc_PestCoHoldingsLLCAndPestCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:to="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllIndividualsMember_terseLabel_en-US" xlink:label="lab_ecd_AllIndividualsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Individuals</link:label>
    <link:label id="lab_ecd_AllIndividualsMember_label_en-US" xlink:label="lab_ecd_AllIndividualsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Individuals [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AllIndividualsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="lab_ecd_AllIndividualsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AQSageBuyerLLCMember_d0b59938-4f56-40ff-8b4e-ccc094153a58_terseLabel_en-US" xlink:label="lab_arcc_AQSageBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AQ Sage Buyer, LLC</link:label>
    <link:label id="lab_arcc_AQSageBuyerLLCMember_label_en-US" xlink:label="lab_arcc_AQSageBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AQ Sage Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_AQSageBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_AQSageBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AQ Sage Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AQSageBuyerLLCMember" xlink:href="arcc-20241231.xsd#arcc_AQSageBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AQSageBuyerLLCMember" xlink:to="lab_arcc_AQSageBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableRateAxis_b80c0322-d1dc-467a-ac23-0c1b2355fdb7_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableRateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis" xlink:to="lab_us-gaap_VariableRateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:to="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest_fdff861d-5b5a-4396-9bd5-8e515b4dd2ca_terseLabel_en-US" xlink:label="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlling interests in Consolidated IHAM Vehicles</link:label>
    <link:label id="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Members' Equity Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MembersEquityAttributableToNoncontrollingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:to="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementOfStockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashHeldInForeignCurrency_4d985e90-fab3-4629-9443-5ed69306297f_terseLabel_en-US" xlink:label="lab_us-gaap_CashHeldInForeignCurrency" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash denominated in foreign currencies</link:label>
    <link:label id="lab_us-gaap_CashHeldInForeignCurrency_label_en-US" xlink:label="lab_us-gaap_CashHeldInForeignCurrency" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Held in Foreign Currency</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashHeldInForeignCurrency" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashHeldInForeignCurrency"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashHeldInForeignCurrency" xlink:to="lab_us-gaap_CashHeldInForeignCurrency" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ReddyIceLLCMember_cd88d605-8928-4d14-932c-2c05de529cbe_terseLabel_en-US" xlink:label="lab_arcc_ReddyIceLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reddy Ice LLC</link:label>
    <link:label id="lab_arcc_ReddyIceLLCMember_label_en-US" xlink:label="lab_arcc_ReddyIceLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reddy Ice LLC [Member]</link:label>
    <link:label id="lab_arcc_ReddyIceLLCMember_documentation_en-US" xlink:label="lab_arcc_ReddyIceLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reddy Ice LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ReddyIceLLCMember" xlink:href="arcc-20241231.xsd#arcc_ReddyIceLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ReddyIceLLCMember" xlink:to="lab_arcc_ReddyIceLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AresCapitalCorporationMember_8858dd12-8dc9-4892-9c98-2840c0736b61_terseLabel_en-US" xlink:label="lab_arcc_AresCapitalCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ares Capital Corporation</link:label>
    <link:label id="lab_arcc_AresCapitalCorporationMember_label_en-US" xlink:label="lab_arcc_AresCapitalCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ares Capital Corporation [Member]</link:label>
    <link:label id="lab_arcc_AresCapitalCorporationMember_documentation_en-US" xlink:label="lab_arcc_AresCapitalCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ares Capital Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AresCapitalCorporationMember" xlink:href="arcc-20241231.xsd#arcc_AresCapitalCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AresCapitalCorporationMember" xlink:to="lab_arcc_AresCapitalCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_78133873-3c2c-46bf-b7b4-02deeb21f476_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Revolving and Term Loan</link:label>
    <link:label id="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Line of Credit Facilities [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:to="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfDependencyOnKeyPersonnelMember_label_en-US" xlink:label="lab_arcc_RiskOfDependencyOnKeyPersonnelMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Dependency On Key Personnel [Member]</link:label>
    <link:label id="lab_arcc_RiskOfDependencyOnKeyPersonnelMember_documentation_en-US" xlink:label="lab_arcc_RiskOfDependencyOnKeyPersonnelMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Dependency On Key Personnel</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfDependencyOnKeyPersonnelMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfDependencyOnKeyPersonnelMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfDependencyOnKeyPersonnelMember" xlink:to="lab_arcc_RiskOfDependencyOnKeyPersonnelMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ContinentalAcquisitionHoldingsIncMember_48888556-f7b1-4219-ac82-6d2d7c84629b_terseLabel_en-US" xlink:label="lab_arcc_ContinentalAcquisitionHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Continental Acquisition Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ContinentalAcquisitionHoldingsIncMember_label_en-US" xlink:label="lab_arcc_ContinentalAcquisitionHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Continental Acquisition Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ContinentalAcquisitionHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ContinentalAcquisitionHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Continental Acquisition Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ContinentalAcquisitionHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ContinentalAcquisitionHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ContinentalAcquisitionHoldingsIncMember" xlink:to="lab_arcc_ContinentalAcquisitionHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember_6b6dcf77-9e55-462d-8645-a878a6bef2ed_terseLabel_en-US" xlink:label="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Waverly Advisors, LLC and WAAM Topco, LLC</link:label>
    <link:label id="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember_label_en-US" xlink:label="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Waverly Advisors, LLC and WAAM Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Waverly Advisors, LLC and WAAM Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:href="arcc-20241231.xsd#arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:to="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_HonorTechnologyIncMember_label_en-US" xlink:label="lab_arcc_HonorTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Honor Technology, Inc. [Member]</link:label>
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    <link:label id="lab_arcc_KeystoneAgencyPartnersLLCMember_a905169e-6e35-4568-91fd-3350ee4efe91_terseLabel_en-US" xlink:label="lab_arcc_KeystoneAgencyPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Keystone Agency Partners LLC</link:label>
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    <link:label id="lab_arcc_CenterForAutismAndRelatedDisordersLLCMember_documentation_en-US" xlink:label="lab_arcc_CenterForAutismAndRelatedDisordersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Center for Autism and Related Disorders, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CenterForAutismAndRelatedDisordersLLCMember" xlink:href="arcc-20241231.xsd#arcc_CenterForAutismAndRelatedDisordersLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CenterForAutismAndRelatedDisordersLLCMember" xlink:to="lab_arcc_CenterForAutismAndRelatedDisordersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember_54166998-e15f-4782-92b0-e8fb01242815_terseLabel_en-US" xlink:label="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Modigent, LLC and OMERS PMC Investment Holdings LLC</link:label>
    <link:label id="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Modigent, LLC and OMERS PMC Investment Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Modigent, LLC and OMERS PMC Investment Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:to="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember_f7ae0500-891b-4d8d-ad9b-f2f9458cb62f_terseLabel_en-US" xlink:label="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hills Distribution, Inc., Hills Intermediate FT Holdings, LLC and GMP Hills, LP</link:label>
    <link:label id="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember_label_en-US" xlink:label="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hills Distribution, Inc., Hills Intermediate FT Holdings, LLC and GMP Hills, LP [Member]</link:label>
    <link:label id="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember_documentation_en-US" xlink:label="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hills Distribution, Inc., Hills Intermediate FT Holdings, LLC and GMP Hills, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:href="arcc-20241231.xsd#arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember"/>
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    <link:label id="lab_arcc_TelecommunicationServicesMember_1ead1d45-1a52-4a35-bdaf-3415459286d8_terseLabel_en-US" xlink:label="lab_arcc_TelecommunicationServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Telecommunication Services</link:label>
    <link:label id="lab_arcc_TelecommunicationServicesMember_label_en-US" xlink:label="lab_arcc_TelecommunicationServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Telecommunication Services [Member]</link:label>
    <link:label id="lab_arcc_TelecommunicationServicesMember_documentation_en-US" xlink:label="lab_arcc_TelecommunicationServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Telecommunication Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TelecommunicationServicesMember" xlink:href="arcc-20241231.xsd#arcc_TelecommunicationServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TelecommunicationServicesMember" xlink:to="lab_arcc_TelecommunicationServicesMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_ValuationTechniqueAxis_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationTechniqueAxis"/>
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    <link:label id="lab_arcc_StorableIncAndEQTIXCoInvestmentESCSPMember_70044704-6e84-4be5-8e78-226f9557b502_terseLabel_en-US" xlink:label="lab_arcc_StorableIncAndEQTIXCoInvestmentESCSPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Storable, Inc. and EQT IX Co-Investment (E) SCSP</link:label>
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    <link:label id="lab_arcc_March2029NotesMember_20d693db-538a-43c2-b496-598e7bf9a9a6_verboseLabel_en-US" xlink:label="lab_arcc_March2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">March 2029 Notes (principal amount outstanding of $1,000 and $0, respectively)</link:label>
    <link:label id="lab_arcc_March2029NotesMember_label_en-US" xlink:label="lab_arcc_March2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">March 2029 Notes [Member]</link:label>
    <link:label id="lab_arcc_March2029NotesMember_documentation_en-US" xlink:label="lab_arcc_March2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">March 2029 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_March2029NotesMember" xlink:href="arcc-20241231.xsd#arcc_March2029NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_March2029NotesMember" xlink:to="lab_arcc_March2029NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MeasureAxis_terseLabel_en-US" xlink:label="lab_ecd_MeasureAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measure:</link:label>
    <link:label id="lab_ecd_MeasureAxis_label_en-US" xlink:label="lab_ecd_MeasureAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measure [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureAxis" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_MeasureAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MeasureAxis" xlink:to="lab_ecd_MeasureAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyPortfolioTurnover_0eed49a0-676c-4190-9914-7f847842b9e7_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portfolio turnover rate</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyPortfolioTurnover_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Portfolio Turnover</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyPortfolioTurnover"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:to="lab_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember_4d8fc9c1-541e-4d12-9171-3dabbea753f6_terseLabel_en-US" xlink:label="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ferrellgas, L.P. and Ferrelgas Partners, L.P.</link:label>
    <link:label id="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember_label_en-US" xlink:label="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ferrellgas, L.P. and Ferrelgas Partners, L.P. [Member]</link:label>
    <link:label id="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember_documentation_en-US" xlink:label="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ferrellgas, L.P. and Ferrelgas Partners, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:href="arcc-20241231.xsd#arcc_FerrellgasLPAndFerrelgasPartnersLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:to="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentsAbstract_880c633d-e989-416d-b100-d5a335c3e1bc_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments at fair value</link:label>
    <link:label id="lab_us-gaap_InvestmentsAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsAbstract" xlink:to="lab_us-gaap_InvestmentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_78431b83-9911-4c39-97c6-58724c5efa29_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock, net of offering and underwriting costs (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_c9acaf3b-5dda-4c8b-9220-3eda51437b74_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationAxis_7f268454-9468-476d-b3df-7f6e96a556d1_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerAffiliationAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIssuerAffiliationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="lab_us-gaap_InvestmentIssuerAffiliationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember_b0c19dbd-7a8f-4ab7-8373-5bda1d9add81_terseLabel_en-US" xlink:label="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pathstone Family Office LLC and Kelso XI Tailwind Co-Investment, L.P.</link:label>
    <link:label id="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember_label_en-US" xlink:label="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pathstone Family Office LLC and Kelso XI Tailwind Co-Investment, L.P. [Member]</link:label>
    <link:label id="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember_documentation_en-US" xlink:label="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pathstone Family Office LLC and Kelso XI Tailwind Co-Investment, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:href="arcc-20241231.xsd#arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:to="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_de1d1b9e-e2f2-428e-a93e-01b30e0f854e_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlled affiliate company investments</link:label>
    <link:label id="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_label_en-US" xlink:label="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Affiliated Issuer, Noncontrolled [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:to="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAggregatedInvestmentsMember_e1efa9d4-b2d2-4680-b4c9-660fd8ee122c_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other equity</link:label>
    <link:label id="lab_us-gaap_OtherAggregatedInvestmentsMember_ca8304d3-2374-48f2-854d-16ecb22a77f5_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other equity</link:label>
    <link:label id="lab_us-gaap_OtherAggregatedInvestmentsMember_label_en-US" xlink:label="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Security Investments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAggregatedInvestmentsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAggregatedInvestmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAggregatedInvestmentsMember" xlink:to="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IvyHillAssetManagementLPMember_0993ab94-1f41-4015-bf36-35e64bd7e9c8_terseLabel_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P.</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPMember_label_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P. [Member]</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPMember_documentation_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IvyHillAssetManagementLPMember" xlink:href="arcc-20241231.xsd#arcc_IvyHillAssetManagementLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IvyHillAssetManagementLPMember" xlink:to="lab_arcc_IvyHillAssetManagementLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonGaapMeasureDescriptionTextBlock_terseLabel_en-US" xlink:label="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-GAAP Measure Description</link:label>
    <link:label id="lab_ecd_NonGaapMeasureDescriptionTextBlock_label_en-US" xlink:label="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-GAAP Measure Description [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_NonGaapMeasureDescriptionTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:to="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiserIntercoLLCMember_4c2375f1-c141-4651-8e87-5b97dc8a9a3f_terseLabel_en-US" xlink:label="lab_arcc_RiserIntercoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Riser Interco, LLC</link:label>
    <link:label id="lab_arcc_RiserIntercoLLCMember_label_en-US" xlink:label="lab_arcc_RiserIntercoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Riser Interco, LLC [Member]</link:label>
    <link:label id="lab_arcc_RiserIntercoLLCMember_documentation_en-US" xlink:label="lab_arcc_RiserIntercoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Riser Interco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiserIntercoLLCMember" xlink:href="arcc-20241231.xsd#arcc_RiserIntercoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiserIntercoLLCMember" xlink:to="lab_arcc_RiserIntercoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PSCGroupLLCMember_e1003486-a9e9-47f7-a765-478731dd1022_terseLabel_en-US" xlink:label="lab_arcc_PSCGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PSC Group LLC</link:label>
    <link:label id="lab_arcc_PSCGroupLLCMember_label_en-US" xlink:label="lab_arcc_PSCGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PSC Group LLC [Member]</link:label>
    <link:label id="lab_arcc_PSCGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_PSCGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PSC Group LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PSCGroupLLCMember" xlink:href="arcc-20241231.xsd#arcc_PSCGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PSCGroupLLCMember" xlink:to="lab_arcc_PSCGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AuditInformationAbstract_label_en-US" xlink:label="lab_arcc_AuditInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Audit Information [Abstract]</link:label>
    <link:label id="lab_arcc_AuditInformationAbstract_documentation_en-US" xlink:label="lab_arcc_AuditInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Audit Information [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AuditInformationAbstract" xlink:href="arcc-20241231.xsd#arcc_AuditInformationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AuditInformationAbstract" xlink:to="lab_arcc_AuditInformationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember_451baa93-4c34-45f0-85ee-dee66cd8d3f3_terseLabel_en-US" xlink:label="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RTI Surgical, Inc. and Pioneer Surgical Technology, Inc.</link:label>
    <link:label id="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember_label_en-US" xlink:label="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RTI Surgical, Inc. and Pioneer Surgical Technology, Inc. [Member]</link:label>
    <link:label id="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember_documentation_en-US" xlink:label="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RTI Surgical, Inc. and Pioneer Surgical Technology, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember" xlink:href="arcc-20241231.xsd#arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember" xlink:to="lab_arcc_RTISurgicalIncAndPioneerSurgicalTechnologyIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityComponentDomain_cc3be745-a0eb-42fe-9cf6-c71934bea030_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:label id="lab_us-gaap_EquityComponentDomain_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain" xlink:to="lab_us-gaap_EquityComponentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountingStandardsUpdateExtensibleList_c8b38bf5-a3c8-4504-a6e7-900674e06288_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdateExtensibleList" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Standards Update [Extensible Enumeration]</link:label>
    <link:label id="lab_us-gaap_AccountingStandardsUpdateExtensibleList_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdateExtensibleList" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Standards Update [Extensible Enumeration]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdateExtensibleList" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountingStandardsUpdateExtensibleList"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingStandardsUpdateExtensibleList" xlink:to="lab_us-gaap_AccountingStandardsUpdateExtensibleList" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WRESportsInvestmentsLLCMember_93b6e17a-cfcb-4dde-a679-5f92f8a947c0_terseLabel_en-US" xlink:label="lab_arcc_WRESportsInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WRE Sports Investments LLC</link:label>
    <link:label id="lab_arcc_WRESportsInvestmentsLLCMember_label_en-US" xlink:label="lab_arcc_WRESportsInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WRE Sports Investments LLC [Member]</link:label>
    <link:label id="lab_arcc_WRESportsInvestmentsLLCMember_documentation_en-US" xlink:label="lab_arcc_WRESportsInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WRE Sports Investments LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WRESportsInvestmentsLLCMember" xlink:href="arcc-20241231.xsd#arcc_WRESportsInvestmentsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WRESportsInvestmentsLLCMember" xlink:to="lab_arcc_WRESportsInvestmentsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NotesAndLoansPayable_310dfa28-f84f-4b69-8098-547ea214285f_terseLabel_en-US" xlink:label="lab_us-gaap_NotesAndLoansPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_NotesAndLoansPayable_label_en-US" xlink:label="lab_us-gaap_NotesAndLoansPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notes and Loans Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansPayable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesAndLoansPayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NotesAndLoansPayable" xlink:to="lab_us-gaap_NotesAndLoansPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_Additional402vDisclosureTextBlock_terseLabel_en-US" xlink:label="lab_ecd_Additional402vDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional 402(v) Disclosure</link:label>
    <link:label id="lab_ecd_Additional402vDisclosureTextBlock_label_en-US" xlink:label="lab_ecd_Additional402vDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional 402(v) Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Additional402vDisclosureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_Additional402vDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_Additional402vDisclosureTextBlock" xlink:to="lab_ecd_Additional402vDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember_label_en-US" xlink:label="lab_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Being Target Of Litigation Or Regulatory Investigations [Member]</link:label>
    <link:label id="lab_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Being Target Of Litigation Or Regulatory Investigations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember" xlink:to="lab_arcc_RiskOfBeingTargetOfLitigationOrRegulatoryInvestigationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_832022b3-8cf0-4fb9-978b-b6c6fe957a0f_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net transfers in and/or out of Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentAffiliatedIssuerControlledMember_b30ce581-abf1-476c-b565-0632e26aac33_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Controlled affiliate company investments</link:label>
    <link:label id="lab_us-gaap_InvestmentAffiliatedIssuerControlledMember_label_en-US" xlink:label="lab_us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Affiliated Issuer, Controlled [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:to="lab_us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityShellCompany_929d1e58-d747-4a2d-b5a3-463075460e1d_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityShellCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany" xlink:to="lab_dei_EntityShellCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease_3582cca8-97d4-48c3-bcce-b181d1a4c073_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchases of common stock (in dollars per share)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease_label_en-US" xlink:label="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Share Repurchase, Per Share, Increase (Decrease)</link:label>
    <link:label id="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Share Repurchase, Per Share, Increase (Decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease" xlink:to="lab_arcc_InvestmentCompanyShareRepurchasePerShareIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_1dbce56c-4ff2-4262-acc9-93e93576747c_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_2031b632-bffb-4a82-a650-40d7dbf88f76_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividends Declared and Payable</link:label>
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_label_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Declared [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDeclaredTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsDeclaredTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsDeclaredTableTextBlock" xlink:to="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EmergencyCommunicationsNetworkLLCMember_c717cd6b-2909-4324-81e8-a9de1aa606b6_terseLabel_en-US" xlink:label="lab_arcc_EmergencyCommunicationsNetworkLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Emergency Communications Network, LLC</link:label>
    <link:label id="lab_arcc_EmergencyCommunicationsNetworkLLCMember_label_en-US" xlink:label="lab_arcc_EmergencyCommunicationsNetworkLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Emergency Communications Network, LLC [Member]</link:label>
    <link:label id="lab_arcc_EmergencyCommunicationsNetworkLLCMember_documentation_en-US" xlink:label="lab_arcc_EmergencyCommunicationsNetworkLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Emergency Communications Network, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EmergencyCommunicationsNetworkLLCMember" xlink:href="arcc-20241231.xsd#arcc_EmergencyCommunicationsNetworkLLCMember"/>
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    <link:label id="lab_arcc_ThermostatPurchaserIIIIncMember_cacfc25b-22af-4448-9a7e-89bd7b3bf6a9_terseLabel_en-US" xlink:label="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thermostat Purchaser III, Inc.</link:label>
    <link:label id="lab_arcc_ThermostatPurchaserIIIIncMember_label_en-US" xlink:label="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Thermostat Purchaser III, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ThermostatPurchaserIIIIncMember_documentation_en-US" xlink:label="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Thermostat Purchaser III, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ThermostatPurchaserIIIIncMember" xlink:href="arcc-20241231.xsd#arcc_ThermostatPurchaserIIIIncMember"/>
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    <link:label id="lab_arcc_SaturnPurchaserCorpMember_4d08defb-1d95-480f-b526-5909ec29e3f4_terseLabel_en-US" xlink:label="lab_arcc_SaturnPurchaserCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Saturn Purchaser Corp.</link:label>
    <link:label id="lab_arcc_SaturnPurchaserCorpMember_label_en-US" xlink:label="lab_arcc_SaturnPurchaserCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Saturn Purchaser Corp. [Member]</link:label>
    <link:label id="lab_arcc_SaturnPurchaserCorpMember_documentation_en-US" xlink:label="lab_arcc_SaturnPurchaserCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Saturn Purchaser Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SaturnPurchaserCorpMember" xlink:href="arcc-20241231.xsd#arcc_SaturnPurchaserCorpMember"/>
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    <link:label id="lab_us-gaap_StatementTable_ada5024c-efd7-46ab-8952-4f86f0b32ff1_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_label_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable" xlink:to="lab_us-gaap_StatementTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestExpenseDebt_d0feaf24-367e-4651-bd98-816d267068a4_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stated interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpenseDebt_label_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseDebt" xlink:to="lab_us-gaap_InterestExpenseDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_June2028NotesMember_69e79e30-2645-47c1-9e3b-85bda239f3d6_terseLabel_en-US" xlink:label="lab_arcc_June2028NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">June 2028 Notes</link:label>
    <link:label id="lab_arcc_June2028NotesMember_98b790c4-a330-4afd-be3d-9fc889c8b923_verboseLabel_en-US" xlink:label="lab_arcc_June2028NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">June 2028 Notes (principal amount outstanding of $1,250)</link:label>
    <link:label id="lab_arcc_June2028NotesMember_label_en-US" xlink:label="lab_arcc_June2028NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">June 2028 Notes [Member]</link:label>
    <link:label id="lab_arcc_June2028NotesMember_documentation_en-US" xlink:label="lab_arcc_June2028NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">June 2028 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_June2028NotesMember" xlink:href="arcc-20241231.xsd#arcc_June2028NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_June2028NotesMember" xlink:to="lab_arcc_June2028NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_7a7e2cfe-769a-4154-a177-7afb5488647e_terseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SIGNIFICANT ACCOUNTING POLICIES</link:label>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_label_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SignificantAccountingPoliciesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasicLineItems_9b767a49-6f8b-410a-b74e-abcb611e7372_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicLineItems_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareBasicLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems" xlink:to="lab_us-gaap_EarningsPerShareBasicLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ApexServicePartnersLLCMember_5087c544-08b8-43db-88c8-4ce8429b17c1_terseLabel_en-US" xlink:label="lab_arcc_ApexServicePartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Apex Service Partners, LLC</link:label>
    <link:label id="lab_arcc_ApexServicePartnersLLCMember_label_en-US" xlink:label="lab_arcc_ApexServicePartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Apex Service Partners, LLC [Member]</link:label>
    <link:label id="lab_arcc_ApexServicePartnersLLCMember_documentation_en-US" xlink:label="lab_arcc_ApexServicePartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Apex Service Partners, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ApexServicePartnersLLCMember" xlink:href="arcc-20241231.xsd#arcc_ApexServicePartnersLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ApexServicePartnersLLCMember" xlink:to="lab_arcc_ApexServicePartnersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember_label_en-US" xlink:label="lab_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Fee Structure Inducing Speculative Investments [Member]</link:label>
    <link:label id="lab_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Fee Structure Inducing Speculative Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember" xlink:to="lab_arcc_RiskOfFeeStructureInducingSpeculativeInvestmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsDomain_d12e02eb-56eb-4b8a-8399-c00a179947ea_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:label id="lab_srt_ConsolidationItemsDomain_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain" xlink:to="lab_srt_ConsolidationItemsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitmentsNet_98de41f3-b6ef-4976-8394-3084ea8dc5c6_negatedTerseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: funded commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitmentsNet_label_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Funded Commitments, Net</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitmentsNet_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Funded Commitments, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyFundedCommitmentsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:to="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue_85e889aa-95e2-4d4c-a52e-5bfc17e42bef_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans on non-accrual status, as a percent of total investments at fair value</link:label>
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    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:to="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember_ce2228e8-44bb-4ff1-afd9-c14d8ac581c6_terseLabel_en-US" xlink:label="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wellington Bidco Inc. and Wellington TopCo LP</link:label>
    <link:label id="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember_label_en-US" xlink:label="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wellington Bidco Inc. and Wellington TopCo LP [Member]</link:label>
    <link:label id="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wellington Bidco Inc. and Wellington TopCo LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:href="arcc-20241231.xsd#arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:to="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_7264c32f-0942-4c13-89b0-15a9ea0f9ed6_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of net investment income to average net assets</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Investment Income (Loss) Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:to="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_f7159bf4-dd42-4004-8009-676f45a3f68d_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayments</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements"/>
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    <link:label id="lab_arcc_TechnologyHardwareAndEquipmentMember_fe8f0dcf-461c-4a0d-a578-de658253c98e_terseLabel_en-US" xlink:label="lab_arcc_TechnologyHardwareAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Technology Hardware and Equipment</link:label>
    <link:label id="lab_arcc_TechnologyHardwareAndEquipmentMember_label_en-US" xlink:label="lab_arcc_TechnologyHardwareAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Technology Hardware And Equipment [Member]</link:label>
    <link:label id="lab_arcc_TechnologyHardwareAndEquipmentMember_documentation_en-US" xlink:label="lab_arcc_TechnologyHardwareAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Technology Hardware And Equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TechnologyHardwareAndEquipmentMember" xlink:href="arcc-20241231.xsd#arcc_TechnologyHardwareAndEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TechnologyHardwareAndEquipmentMember" xlink:to="lab_arcc_TechnologyHardwareAndEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestPaidNet_66f05949-e0b7-4859-a939-07b8cb094c6e_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest paid during the period</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_b48c3339-fe8f-49a8-81c0-cc2cdecaa931_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for interest expense</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestPaidNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet" xlink:to="lab_us-gaap_InterestPaidNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SeniorDirectLendingProgramMember_80c8bf18-c1ba-40e0-8029-45304dc4d848_terseLabel_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program</link:label>
    <link:label id="lab_arcc_SeniorDirectLendingProgramMember_label_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program [Member]</link:label>
    <link:label id="lab_arcc_SeniorDirectLendingProgramMember_documentation_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SeniorDirectLendingProgramMember" xlink:href="arcc-20241231.xsd#arcc_SeniorDirectLendingProgramMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SeniorDirectLendingProgramMember" xlink:to="lab_arcc_SeniorDirectLendingProgramMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember_bce74ca2-5d9d-46e1-a23c-a76b929fbdaa_terseLabel_en-US" xlink:label="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Radius Aerospace, Inc. and Radius Aerospace Europe Limited</link:label>
    <link:label id="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember_label_en-US" xlink:label="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Radius Aerospace, Inc. and Radius Aerospace Europe Limited [Member]</link:label>
    <link:label id="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember_documentation_en-US" xlink:label="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Radius Aerospace, Inc. and Radius Aerospace Europe Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:href="arcc-20241231.xsd#arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:to="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OverAllotmentOptionTwoMember_f44d6f0e-485a-4f47-86a1-0d4dd13bfc4c_terseLabel_en-US" xlink:label="lab_arcc_OverAllotmentOptionTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Over-allotment option two</link:label>
    <link:label id="lab_arcc_OverAllotmentOptionTwoMember_label_en-US" xlink:label="lab_arcc_OverAllotmentOptionTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Over-Allotment Option Two [Member]</link:label>
    <link:label id="lab_arcc_OverAllotmentOptionTwoMember_documentation_en-US" xlink:label="lab_arcc_OverAllotmentOptionTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Over-Allotment Option Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OverAllotmentOptionTwoMember" xlink:href="arcc-20241231.xsd#arcc_OverAllotmentOptionTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OverAllotmentOptionTwoMember" xlink:to="lab_arcc_OverAllotmentOptionTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsUnderManagementCarryingAmount_72304519-287f-4741-8ead-fb49a62313b4_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsUnderManagementCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets under management</link:label>
    <link:label id="lab_us-gaap_AssetsUnderManagementCarryingAmount_label_en-US" xlink:label="lab_us-gaap_AssetsUnderManagementCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets under Management, Carrying Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsUnderManagementCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsUnderManagementCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsUnderManagementCarryingAmount" xlink:to="lab_us-gaap_AssetsUnderManagementCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LineOfCreditFacilityPercentageOfCommitment_7e4e4637-1859-410e-b3f1-ef12425061e9_terseLabel_en-US" xlink:label="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of total commitment under line of credit</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityPercentageOfCommitment_label_en-US" xlink:label="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Percentage Of Commitment</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityPercentageOfCommitment_documentation_en-US" xlink:label="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Percentage Of Commitment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:href="arcc-20241231.xsd#arcc_LineOfCreditFacilityPercentageOfCommitment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:to="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare_b1ea8bcf-2197-476d-807c-12fea7852371_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchases of common stock (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Share Repurchase, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare" xlink:to="lab_us-gaap_InvestmentCompanyRepurchaseOfSharesPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_7f7d1a0a-dd6d-4383-bf58-9fb91c74dda6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 1</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DistributionExpense_4a2a6114-b0e1-4dcd-9dfe-5130a692ff94_terseLabel_en-US" xlink:label="lab_arcc_DistributionExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distributions to subordinated notes</link:label>
    <link:label id="lab_arcc_DistributionExpense_label_en-US" xlink:label="lab_arcc_DistributionExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Distribution Expense</link:label>
    <link:label id="lab_arcc_DistributionExpense_documentation_en-US" xlink:label="lab_arcc_DistributionExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Distribution Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DistributionExpense" xlink:href="arcc-20241231.xsd#arcc_DistributionExpense"/>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:href="arcc-20241231.xsd#arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:to="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PetvisorHoldingsLLCMember_1be67ef9-c97a-4a9c-aa35-94c15db317de_terseLabel_en-US" xlink:label="lab_arcc_PetvisorHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Petvisor Holdings, LLC</link:label>
    <link:label id="lab_arcc_PetvisorHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PetvisorHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Petvisor Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PetvisorHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PetvisorHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Petvisor Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PetvisorHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_PetvisorHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PetvisorHoldingsLLCMember" xlink:to="lab_arcc_PetvisorHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtPolicyTextBlock_7d03f422-2c56-45c6-886c-1da6ff98fc78_terseLabel_en-US" xlink:label="lab_us-gaap_DebtPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Issuance Costs</link:label>
    <link:label id="lab_us-gaap_DebtPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtPolicyTextBlock" xlink:to="lab_us-gaap_DebtPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_7413e93e-1903-43cd-a89b-0cd0b6c3c734_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease, weighted average discount rate, percent</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:to="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivableInvestmentSale_47b37ee8-61d7-4761-b6b1-2c11008c1f37_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivableInvestmentSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable for open trades</link:label>
    <link:label id="lab_us-gaap_ReceivableInvestmentSale_label_en-US" xlink:label="lab_us-gaap_ReceivableInvestmentSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable, Investment, Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableInvestmentSale" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReceivableInvestmentSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivableInvestmentSale" xlink:to="lab_us-gaap_ReceivableInvestmentSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_45e54847-b529-43b4-bb5a-483a38fffbe5_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember_b5ef2520-7ab9-443b-a239-29323df7e24a_terseLabel_en-US" xlink:label="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Microstar Logistics LLC, Microstar Global Asset Management LLC, MStar Holding Corporation and Kegstar USA Inc.</link:label>
    <link:label id="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember_label_en-US" xlink:label="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Microstar Logistics LLC, Microstar Global Asset Management LLC, MStar Holding Corporation and Kegstar USA Inc. [Member]</link:label>
    <link:label id="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember_documentation_en-US" xlink:label="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Microstar Logistics LLC, Microstar Global Asset Management LLC, MStar Holding Corporation and Kegstar USA Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember" xlink:href="arcc-20241231.xsd#arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember" xlink:to="lab_arcc_MicrostarLogisticsLLCMicrostarGlobalAssetManagementLLCMStarHoldingCorporationAndKegstarUSAIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityAxis_38c517ce-b6b3-4cd3-90e7-eea8d6066171_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis" xlink:to="lab_us-gaap_CreditFacilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember_e88dfc09-2a24-4367-b204-af00a6410c16_terseLabel_en-US" xlink:label="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ardonagh Midco 2 plc and Ardonagh Midco 3 plc</link:label>
    <link:label id="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember_label_en-US" xlink:label="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ardonagh Midco 2 plc and Ardonagh Midco 3 plc [Member]</link:label>
    <link:label id="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember_documentation_en-US" xlink:label="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ardonagh Midco 2 plc and Ardonagh Midco 3 plc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember" xlink:href="arcc-20241231.xsd#arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember" xlink:to="lab_arcc_ArdonaghMidco2PlcAndArdonaghMidco3PlcMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock_de14aa91-a34b-495f-a689-06c64a779e32_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends to Common Stockholders</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentCompanyDistributionPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:to="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member_3389f5b1-abe0-4bec-a1c5-d8241aa35530_terseLabel_en-US" xlink:label="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premier Specialties, Inc. and RMCF V CIV XLIV, L.P.</link:label>
    <link:label id="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member_label_en-US" xlink:label="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premier Specialties, Inc. and RMCF V CIV XLIV, L.P. [Member]</link:label>
    <link:label id="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member_documentation_en-US" xlink:label="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Premier Specialties, Inc. and RMCF V CIV XLIV, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:href="arcc-20241231.xsd#arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:to="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions_a9c20d11-297e-4804-a0db-73e4196dbbdc_totalLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Taxable income</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions_label_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distributed Earnings (Loss), Before Deductions</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Distributed Earnings (Loss), Before Deductions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions" xlink:href="arcc-20241231.xsd#arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions" xlink:to="lab_arcc_InvestmentCompanyDistributedEarningsLossBeforeDeductions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_860a2e74-e93c-42af-a276-f9db889d2033_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value disclosures of long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_label_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtFairValue" xlink:to="lab_us-gaap_LongTermDebtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_bd094a05-254a-4056-8e18-4e4539a918d4_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MaterialsSectorMember_af77b277-e8ef-4385-ab81-be7ce40e9c57_terseLabel_en-US" xlink:label="lab_arcc_MaterialsSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Materials</link:label>
    <link:label id="lab_arcc_MaterialsSectorMember_label_en-US" xlink:label="lab_arcc_MaterialsSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Materials Sector [Member]</link:label>
    <link:label id="lab_arcc_MaterialsSectorMember_documentation_en-US" xlink:label="lab_arcc_MaterialsSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Materials Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MaterialsSectorMember" xlink:href="arcc-20241231.xsd#arcc_MaterialsSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MaterialsSectorMember" xlink:to="lab_arcc_MaterialsSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_797675f5-2bf6-4324-a8dd-9f323c47487b_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OPERATING ACTIVITIES:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities_e87555cf-0717-4ab8-83ad-0ce79cae3591_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and other liabilities</link:label>
    <link:label id="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable and Other Accrued Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:to="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToNonPeoNeoCompFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Non-PEO NEO Compensation Footnote</link:label>
    <link:label id="lab_ecd_AdjToNonPeoNeoCompFnTextBlock_label_en-US" xlink:label="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Non-PEO NEO Compensation Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AdjToNonPeoNeoCompFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:to="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardGrantDateFairValue_terseLabel_en-US" xlink:label="lab_ecd_AwardGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value as of Grant Date</link:label>
    <link:label id="lab_ecd_AwardGrantDateFairValue_label_en-US" xlink:label="lab_ecd_AwardGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Grant Date Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardGrantDateFairValue" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardGrantDateFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardGrantDateFairValue" xlink:to="lab_ecd_AwardGrantDateFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CustomerConcentrationRiskMember_5f3573db-3fe9-44ec-baa4-3f974aff2e1a_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer Concentration Risk</link:label>
    <link:label id="lab_us-gaap_CustomerConcentrationRiskMember_label_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer Concentration Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CustomerConcentrationRiskMember" xlink:to="lab_us-gaap_CustomerConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfDifficultyPayingRequiredDistributionsMember_label_en-US" xlink:label="lab_arcc_RiskOfDifficultyPayingRequiredDistributionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Difficulty Paying Required Distributions [Member]</link:label>
    <link:label id="lab_arcc_RiskOfDifficultyPayingRequiredDistributionsMember_documentation_en-US" xlink:label="lab_arcc_RiskOfDifficultyPayingRequiredDistributionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Difficulty Paying Required Distributions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfDifficultyPayingRequiredDistributionsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfDifficultyPayingRequiredDistributionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfDifficultyPayingRequiredDistributionsMember" xlink:to="lab_arcc_RiskOfDifficultyPayingRequiredDistributionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember_label_en-US" xlink:label="lab_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Regulations Affecting Ability To Raise Additional Capital [Member]</link:label>
    <link:label id="lab_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember_documentation_en-US" xlink:label="lab_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Regulations Affecting Ability To Raise Additional Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember" xlink:to="lab_arcc_RiskOfRegulationsAffectingAbilityToRaiseAdditionalCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_AffiliatedEntityMember_692d4b34-3856-44e9-9d7b-f8c9a03aeb13_terseLabel_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Controlled Affiliate</link:label>
    <link:label id="lab_srt_AffiliatedEntityMember_label_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Affiliated Entity [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_AffiliatedEntityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_AffiliatedEntityMember" xlink:to="lab_srt_AffiliatedEntityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_44f36023-9fdd-4614-99dd-f7339b9b6d79_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 2</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member" xlink:to="lab_us-gaap_FairValueInputsLevel2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EquityOfferingExpensesPolicyTextBlock_4fb14513-b8ce-4c33-88f0-3c85cbe1f5b1_terseLabel_en-US" xlink:label="lab_arcc_EquityOfferingExpensesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Offering Expenses</link:label>
    <link:label id="lab_arcc_EquityOfferingExpensesPolicyTextBlock_label_en-US" xlink:label="lab_arcc_EquityOfferingExpensesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Offering Expenses [Policy Text Block]</link:label>
    <link:label id="lab_arcc_EquityOfferingExpensesPolicyTextBlock_documentation_en-US" xlink:label="lab_arcc_EquityOfferingExpensesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity Offering Expenses Policy Text Block</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EquityOfferingExpensesPolicyTextBlock" xlink:href="arcc-20241231.xsd#arcc_EquityOfferingExpensesPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EquityOfferingExpensesPolicyTextBlock" xlink:to="lab_arcc_EquityOfferingExpensesPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember_9793be21-c9a1-45e6-a0d9-aee1512cd7dd_terseLabel_en-US" xlink:label="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">APG Intermediate Holdings Corporation and APG Holdings, LLC</link:label>
    <link:label id="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">APG Intermediate Holdings Corporation and APG Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">APG Intermediate Holdings Corporation and APG Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember" xlink:to="lab_arcc_APGIntermediateHoldingsCorporationAndAPGHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ManagementAndServiceFeesBaseRate_eca2a809-4f33-4709-9cbf-e88302a23785_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementAndServiceFeesBaseRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee rate</link:label>
    <link:label id="lab_us-gaap_ManagementAndServiceFeesBaseRate_label_en-US" xlink:label="lab_us-gaap_ManagementAndServiceFeesBaseRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management and Service Fees, Base Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementAndServiceFeesBaseRate" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ManagementAndServiceFeesBaseRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementAndServiceFeesBaseRate" xlink:to="lab_us-gaap_ManagementAndServiceFeesBaseRate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ITIHoldingsIncMember_475a8634-19e5-430b-bce0-6d03a22d9bb5_terseLabel_en-US" xlink:label="lab_arcc_ITIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ITI Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ITIHoldingsIncMember_label_en-US" xlink:label="lab_arcc_ITIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ITI Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ITIHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ITIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ITI Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ITIHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_ITIHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ITIHoldingsIncMember" xlink:to="lab_arcc_ITIHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_SegmentGeographicalDomain_287db1f0-e5aa-4bf2-a44f-d9184cda4c75_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain" xlink:to="lab_srt_SegmentGeographicalDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember_588254f3-5bb7-48a9-87a7-928e757c824b_terseLabel_en-US" xlink:label="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Priority Waste Holdings LLC, Priority Waste Holdings Indiana LLC and Priority Waste Super Holdings, LLC</link:label>
    <link:label id="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Priority Waste Holdings LLC, Priority Waste Holdings Indiana LLC and Priority Waste Super Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Priority Waste Holdings LLC, Priority Waste Holdings Indiana LLC and Priority Waste Super Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:href="arcc-20241231.xsd#arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:to="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LightbeamBidcoIncMember_503e1b04-62cc-45bb-ad7b-7cdb43be34f0_terseLabel_en-US" xlink:label="lab_arcc_LightbeamBidcoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lightbeam Bidco, Inc</link:label>
    <link:label id="lab_arcc_LightbeamBidcoIncMember_label_en-US" xlink:label="lab_arcc_LightbeamBidcoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lightbeam Bidco, Inc [Member]</link:label>
    <link:label id="lab_arcc_LightbeamBidcoIncMember_documentation_en-US" xlink:label="lab_arcc_LightbeamBidcoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lightbeam Bidco, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LightbeamBidcoIncMember" xlink:href="arcc-20241231.xsd#arcc_LightbeamBidcoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LightbeamBidcoIncMember" xlink:to="lab_arcc_LightbeamBidcoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_a72df37d-f6be-49b0-b27f-1f827a1657cd_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock, net of offering and underwriting costs</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, New Issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2024AInterestRelatedDividendsMember_a3d7b1aa-04dd-41ce-bfed-b44b8f59c25a_terseLabel_en-US" xlink:label="lab_arcc_O2024AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024 Interest-Related Dividends</link:label>
    <link:label id="lab_arcc_O2024AInterestRelatedDividendsMember_label_en-US" xlink:label="lab_arcc_O2024AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2024 A Interest Related Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2024AInterestRelatedDividendsMember_documentation_en-US" xlink:label="lab_arcc_O2024AInterestRelatedDividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2024 A Interest Related Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2024AInterestRelatedDividendsMember" xlink:href="arcc-20241231.xsd#arcc_O2024AInterestRelatedDividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2024AInterestRelatedDividendsMember" xlink:to="lab_arcc_O2024AInterestRelatedDividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember_a0af117f-c4be-4fde-9eb1-0c41d1d55c9d_terseLabel_en-US" xlink:label="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC</link:label>
    <link:label id="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember_label_en-US" xlink:label="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC [Member]</link:label>
    <link:label id="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember_documentation_en-US" xlink:label="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:href="arcc-20241231.xsd#arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:to="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_RestatementDateAxis_terseLabel_en-US" xlink:label="lab_ecd_RestatementDateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement Determination Date:</link:label>
    <link:label id="lab_ecd_RestatementDateAxis_label_en-US" xlink:label="lab_ecd_RestatementDateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Determination Date [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDateAxis" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_RestatementDateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RestatementDateAxis" xlink:to="lab_ecd_RestatementDateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_d67bcc03-05ab-43cf-8d94-2f8d842bedd9_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_427d98d7-ea75-4e2f-b128-48898dca3605_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
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    <link:label id="lab_arcc_AventivTechnologiesLLCAndSecurusTechnologiesHoldingsIncMember_27dafbfe-48f1-46bd-a01c-ecdf7882b3d9_terseLabel_en-US" xlink:label="lab_arcc_AventivTechnologiesLLCAndSecurusTechnologiesHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aventiv Technologies, LLC and Securus Technologies Holdings, Inc.</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_AventivTechnologiesLLCAndSecurusTechnologiesHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_AventivTechnologiesLLCAndSecurusTechnologiesHoldingsIncMember"/>
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    <link:label id="lab_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember_e01d19c1-8c4b-4169-ba78-81e4eb798aae_terseLabel_en-US" xlink:label="lab_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Priority Holdings, LLC and Priority Technology Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Priority Holdings, LLC and Priority Technology Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember" xlink:href="arcc-20241231.xsd#arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember" xlink:to="lab_arcc_PriorityHoldingsLLCAndPriorityTechnologyHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BottomlineTechnologiesIncAndLegalSpendHoldingsLLCMember_e9832011-582e-4e96-879a-6ce6131db0f8_terseLabel_en-US" xlink:label="lab_arcc_BottomlineTechnologiesIncAndLegalSpendHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bottomline Technologies, Inc. and Legal Spend Holdings, LLC</link:label>
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    <link:label id="lab_arcc_RiskOfDebtInvestmentsBeingSubordinatedToOtherCreditorsClaimsMember_label_en-US" xlink:label="lab_arcc_RiskOfDebtInvestmentsBeingSubordinatedToOtherCreditorsClaimsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Debt Investments Being Subordinated To Other Creditors Claims [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfDebtInvestmentsBeingSubordinatedToOtherCreditorsClaimsMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfDebtInvestmentsBeingSubordinatedToOtherCreditorsClaimsMember"/>
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    <link:label id="lab_arcc_OwnershipPercentage_17c8d7aa-a475-4061-b441-5d64c497e6e7_terseLabel_en-US" xlink:label="lab_arcc_OwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ownership percentage of outstanding SDLP Certificates</link:label>
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    <link:label id="lab_arcc_DynamicNCAerospaceHoldingsLLCAndDynamicNCInvestmentHoldingsLPMember_8c5b7416-6b5f-40c3-a5bb-cf496dd665d0_terseLabel_en-US" xlink:label="lab_arcc_DynamicNCAerospaceHoldingsLLCAndDynamicNCInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dynamic NC Aerospace Holdings, LLC and Dynamic NC Investment Holdings, LP</link:label>
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    <link:label id="lab_arcc_LSDELLCAndLMLSQInvestorsLLCMember_c567d942-f26b-4fcd-8281-062cbf861fc0_terseLabel_en-US" xlink:label="lab_arcc_LSDELLCAndLMLSQInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LS DE LLC and LM LSQ Investors LLC</link:label>
    <link:label id="lab_arcc_LSDELLCAndLMLSQInvestorsLLCMember_label_en-US" xlink:label="lab_arcc_LSDELLCAndLMLSQInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LS DE LLC and LM LSQ Investors LLC [Member]</link:label>
    <link:label id="lab_arcc_LSDELLCAndLMLSQInvestorsLLCMember_documentation_en-US" xlink:label="lab_arcc_LSDELLCAndLMLSQInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LS DE LLC and LM LSQ Investors LLC</link:label>
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    <link:label id="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember_398c184d-f37c-4931-8495-a63d89c3698f_terseLabel_en-US" xlink:label="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and KCAKE Holdings Inc.</link:label>
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    <link:label id="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember_cbf83909-7999-481a-ab67-ddd639470070_terseLabel_en-US" xlink:label="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Johnnie-O Inc. and Johnnie-O Holdings Inc.</link:label>
    <link:label id="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember_label_en-US" xlink:label="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Johnnie-O Inc. and Johnnie-O Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Johnnie-O Inc. and Johnnie-O Holdings Inc.</link:label>
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    <link:label id="lab_us-gaap_EarningsPerShareBasic_7d9f7bf9-0839-4a2f-95c4-17db8335bf94_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic (in usd per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_04ed4634-e2c1-4702-ac6e-0372b38b9f76_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net increase in stockholders&#8217; equity resulting from operations per share&#8212;basic (in usd per share)</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_822a33b8-1c97-4bcf-b119-0c9b35e0598d_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net proceeds from issuance of common stock</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember_bbbdcf32-39a3-4efb-816d-44ab60858c57_terseLabel_en-US" xlink:label="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Napa Management Services Corporation and ASP NAPA Holdings, LLC</link:label>
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    <link:label id="lab_ecd_AwardTmgMnpiDiscTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AwardTmgMnpiDiscTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:to="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPaidinkind_f5ab001d-4089-4e9b-9025-c51b894a6988_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collections of PIK dividends</link:label>
    <link:label id="lab_us-gaap_DividendsPaidinkind_a96d6e61-c881-4670-a86a-f5d0d905fe8e_verboseLabel_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividend income collected</link:label>
    <link:label id="lab_us-gaap_DividendsPaidinkind_label_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Paid-in-kind</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPaidinkind" xlink:to="lab_us-gaap_DividendsPaidinkind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember_f60a889e-ab2d-4bd9-b679-abb745df9fae_terseLabel_en-US" xlink:label="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V.</link:label>
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    <link:label id="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount_15dc84d6-d455-45f0-9be7-dc71a1f37af0_terseLabel_en-US" xlink:label="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum issuance of common stock</link:label>
    <link:label id="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount_label_en-US" xlink:label="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Stock, Capital Shares Reserved For Future Issuance, Amount</link:label>
    <link:label id="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount_documentation_en-US" xlink:label="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Stock, Capital Shares Reserved For Future Issuance, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:href="arcc-20241231.xsd#arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:to="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncomeBasedFees_a9f7dde7-b5d4-403f-9015-6064e3101f21_terseLabel_en-US" xlink:label="lab_arcc_IncomeBasedFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee</link:label>
    <link:label id="lab_arcc_IncomeBasedFees_28413327-171b-4d22-96fe-073fc5510aa9_verboseLabel_en-US" xlink:label="lab_arcc_IncomeBasedFees" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income based fee</link:label>
    <link:label id="lab_arcc_IncomeBasedFees_label_en-US" xlink:label="lab_arcc_IncomeBasedFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Based Fees</link:label>
    <link:label id="lab_arcc_IncomeBasedFees_documentation_en-US" xlink:label="lab_arcc_IncomeBasedFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Based Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncomeBasedFees" xlink:href="arcc-20241231.xsd#arcc_IncomeBasedFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncomeBasedFees" xlink:to="lab_arcc_IncomeBasedFees" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SundanceGroupHoldingsIncMember_91b07931-9633-41a1-ac18-551eee3b07c4_terseLabel_en-US" xlink:label="lab_arcc_SundanceGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sundance Group Holdings, Inc.</link:label>
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    <link:label id="lab_us-gaap_DividendsPayableLineItems_ed876811-b6c1-4257-bdc4-c05a093c44fd_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable [Line Items]</link:label>
    <link:label id="lab_us-gaap_DividendsPayableLineItems_label_en-US" xlink:label="lab_us-gaap_DividendsPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable [Line Items]</link:label>
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    <link:label id="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus_9f91946c-e18f-4e65-8b91-8c1336a2a13c_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of loans on non-accrual status</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus_label_en-US" xlink:label="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Number Of Loans On Non-Accrual Status</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Number Of Loans On Non-Accrual Status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:href="arcc-20241231.xsd#arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:to="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember_4e441097-7216-455b-b59b-c10fb8a68f3c_terseLabel_en-US" xlink:label="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PracticeTek Purchaser, LLC, PracticeTek MidCo, LLC and GSV PracticeTek Holdings, LLC</link:label>
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    <link:label id="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PracticeTek Purchaser, LLC, PracticeTek MidCo, LLC and GSV PracticeTek Holdings, LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:to="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetTypeExtensibleList_a778bbc2-e97e-4b00-aba1-ebc5c953d0f9_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetTypeExtensibleList" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset, Type [Extensible Enumeration]</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetTypeExtensibleList_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetTypeExtensibleList" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Type [Extensible Enumeration]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetTypeExtensibleList" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeAssetTypeExtensibleList"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetTypeExtensibleList" xlink:to="lab_us-gaap_DerivativeAssetTypeExtensibleList" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts_c1bf6f5e-3b96-4b74-bd74-f527e30e3d77_terseLabel_en-US" xlink:label="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Upfront Payments/Receipts</link:label>
    <link:label id="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts_label_en-US" xlink:label="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Upfront Payments (Receipts)</link:label>
    <link:label id="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts_documentation_en-US" xlink:label="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Upfront Payments/Receipts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DerivativeLiabilityUpfrontPaymentsReceipts" xlink:href="arcc-20241231.xsd#arcc_DerivativeLiabilityUpfrontPaymentsReceipts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DerivativeLiabilityUpfrontPaymentsReceipts" xlink:to="lab_arcc_DerivativeLiabilityUpfrontPaymentsReceipts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRisk_194e075f-e06f-4a63-8f8a-c8bd570ba93d_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration of Credit Risk</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRisk_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskCreditRisk" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskCreditRisk"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskCreditRisk" xlink:to="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember_65e4e7ff-dc00-4e58-b90a-4d6e308bbcbd_terseLabel_en-US" xlink:label="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NMC Skincare Intermediate Holdings II, LLC</link:label>
    <link:label id="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember_label_en-US" xlink:label="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NMC Skincare Intermediate Holdings II, LLC [Member]</link:label>
    <link:label id="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember_documentation_en-US" xlink:label="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NMC Skincare Intermediate Holdings II, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:href="arcc-20241231.xsd#arcc_NMCSkincareIntermediateHoldingsIILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:to="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCredit_4b419119-3fc4-4c77-a907-d334b815306a_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of credit facility outstanding</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_label_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Line of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit" xlink:to="lab_us-gaap_LineOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_March2032NotesMember_4a5d0f61-45b6-46ed-8ff6-f846bcb43119_terseLabel_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">March 2032 Notes</link:label>
    <link:label id="lab_arcc_March2032NotesMember_label_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">March 2032 Notes [Member]</link:label>
    <link:label id="lab_arcc_March2032NotesMember_documentation_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">March 2032 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_March2032NotesMember" xlink:href="arcc-20241231.xsd#arcc_March2032NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_March2032NotesMember" xlink:to="lab_arcc_March2032NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DerivativeInstrumentsTableAbstract_0cb99c2a-2ce8-4aae-a76e-a92a070c2c4b_terseLabel_en-US" xlink:label="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments Table [Abstract]</link:label>
    <link:label id="lab_arcc_DerivativeInstrumentsTableAbstract_label_en-US" xlink:label="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments Table [Abstract]</link:label>
    <link:label id="lab_arcc_DerivativeInstrumentsTableAbstract_documentation_en-US" xlink:label="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative Instruments Table</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DerivativeInstrumentsTableAbstract" xlink:href="arcc-20241231.xsd#arcc_DerivativeInstrumentsTableAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DerivativeInstrumentsTableAbstract" xlink:to="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CollisionSPSubcoLLCMember_d2ad8783-5309-480c-ad7d-487a6289ff47_terseLabel_en-US" xlink:label="lab_arcc_CollisionSPSubcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collision SP Subco, LLC</link:label>
    <link:label id="lab_arcc_CollisionSPSubcoLLCMember_label_en-US" xlink:label="lab_arcc_CollisionSPSubcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collision SP Subco, LLC [Member]</link:label>
    <link:label id="lab_arcc_CollisionSPSubcoLLCMember_documentation_en-US" xlink:label="lab_arcc_CollisionSPSubcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Collision SP Subco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CollisionSPSubcoLLCMember" xlink:href="arcc-20241231.xsd#arcc_CollisionSPSubcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CollisionSPSubcoLLCMember" xlink:to="lab_arcc_CollisionSPSubcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCMember_324b6526-da2b-4484-b77a-177fdfcbfe88_terseLabel_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC</link:label>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCMember_label_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC [Member]</link:label>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCMember_documentation_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KellermeyerBergensonsServicesLLCMember" xlink:href="arcc-20241231.xsd#arcc_KellermeyerBergensonsServicesLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KellermeyerBergensonsServicesLLCMember" xlink:to="lab_arcc_KellermeyerBergensonsServicesLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember_5b9e0cdd-e7f0-4cc1-9ee0-9aa5bf2ddcde_terseLabel_en-US" xlink:label="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP</link:label>
    <link:label id="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:href="arcc-20241231.xsd#arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:to="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDividendsPayableTextBlock_cd4ecac0-3d8a-454f-a629-78850647bf90_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividend Reinvestment Plan Activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDividendsPayableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Dividends Payable [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDividendsPayableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:to="lab_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RiskOfAdverseTermsOfRedemptionMember_label_en-US" xlink:label="lab_arcc_RiskOfAdverseTermsOfRedemptionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk Of Adverse Terms Of Redemption [Member]</link:label>
    <link:label id="lab_arcc_RiskOfAdverseTermsOfRedemptionMember_documentation_en-US" xlink:label="lab_arcc_RiskOfAdverseTermsOfRedemptionMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Risk Of Adverse Terms Of Redemption</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RiskOfAdverseTermsOfRedemptionMember" xlink:href="arcc-20241231.xsd#arcc_RiskOfAdverseTermsOfRedemptionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RiskOfAdverseTermsOfRedemptionMember" xlink:to="lab_arcc_RiskOfAdverseTermsOfRedemptionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember_596fec95-1ee4-420a-8fab-19b95ed1fe56_terseLabel_en-US" xlink:label="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility</link:label>
    <link:label id="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember_label_en-US" xlink:label="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Secured Revolving Credit Facility [Member]</link:label>
    <link:label id="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember_documentation_en-US" xlink:label="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Secured Revolving Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:href="arcc-20241231.xsd#arcc_SeniorSecuredRevolvingCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:to="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractAUDMember_25ca0385-cbf8-4ecc-9c34-983f359c215d_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractAUDMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, AUD</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractAUDMember_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractAUDMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, AUD [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractAUDMember_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractAUDMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, AUD</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractAUDMember" xlink:href="arcc-20241231.xsd#arcc_ForeignCurrencyForwardContractAUDMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractAUDMember" xlink:to="lab_arcc_ForeignCurrencyForwardContractAUDMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BaseRateDuringReinvestmentPeriodMember_a046a4eb-f538-4ad3-a390-7ce2798a6ce0_terseLabel_en-US" xlink:label="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base Rate, During Reinvestment Period</link:label>
    <link:label id="lab_arcc_BaseRateDuringReinvestmentPeriodMember_label_en-US" xlink:label="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Rate, During Reinvestment Period [Member]</link:label>
    <link:label id="lab_arcc_BaseRateDuringReinvestmentPeriodMember_documentation_en-US" xlink:label="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Base Rate, During Reinvestment Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:href="arcc-20241231.xsd#arcc_BaseRateDuringReinvestmentPeriodMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:to="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_42705a0a-a40e-4ad0-b8b1-c1cbcec904c5_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_66fef31c-7916-47c0-a0df-2a3ddf8ddfae_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowings on debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_28751889-42ae-4305-8a93-a958c0b4e94b_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Carrying and Fair Values of Debt Obligations</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]</link:label>
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