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  <xs:element id="cacc_ServiceFeeIncomeAsPercentageOfCollections" abstract="false" name="ServiceFeeIncomeAsPercentageOfCollections" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_RealizedNetCashFlows" abstract="false" name="RealizedNetCashFlows" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_AcceleratedPaymentsOfDealerHoldback" abstract="false" name="AcceleratedPaymentsOfDealerHoldback" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_Percentageofnewconsumerloansdollarvolume" abstract="false" name="Percentageofnewconsumerloansdollarvolume" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_DealersMember" abstract="true" name="DealersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansReceivableExpectedNetCashFlowsAtAssignment" abstract="false" name="LoansReceivableExpectedNetCashFlowsAtAssignment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_MonthlyServicingFeePerFinancing" abstract="false" name="MonthlyServicingFeePerFinancing" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2017Member" abstract="true" name="LoansOriginatingIn2017Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_RemovalOfCOVIDForecastAdjustmentMember" abstract="true" name="RemovalOfCOVIDForecastAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_UnearnedPremiumMember" abstract="true" name="UnearnedPremiumMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsTotal" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_SummaryOfSignificantAccountingPoliciesTable" abstract="true" name="SummaryOfSignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_RemarketingFeesMember" abstract="true" name="RemarketingFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsInThreeYears" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsInThreeYears" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingInTheCurrentYearMember" abstract="true" name="LoansOriginatingInTheCurrentYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_NumberOfBusinessPrograms" abstract="false" name="NumberOfBusinessPrograms" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2015Member" abstract="true" name="LoansOriginatingIn2015Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2018Member" abstract="true" name="LoansOriginatingIn2018Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_RevenueFromEnrollmentAndRegistrationFeesInProgram" abstract="false" name="RevenueFromEnrollmentAndRegistrationFeesInProgram" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchasedIncrease" abstract="false" name="StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchasedIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cacc_AncillaryproductprofitsharingMember" abstract="true" name="AncillaryproductprofitsharingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyFourAMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyFourAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TwoThousandTwentyFourSeniorNotesMember" abstract="true" name="TwoThousandTwentyFourSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_NewConsumerLoanAssignments" abstract="false" name="NewConsumerLoanAssignments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ScheduleOfOtherIncomeTableTextBlock" abstract="false" name="ScheduleOfOtherIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_MaximumHedgingReserve" abstract="false" name="MaximumHedgingReserve" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeAMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_StockRepurchasesTextBlock" abstract="false" name="StockRepurchasesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_Expectedfuturefinancechargesatthetimeofassignment" abstract="false" name="Expectedfuturefinancechargesatthetimeofassignment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_DescriptionOfBusinessAbstract" abstract="true" name="DescriptionOfBusinessAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_ForecastedNetCashFlows" abstract="false" name="ForecastedNetCashFlows" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansReceivableVarianceInForecastedCollectionPercentageFromPriorQuarterEnd" abstract="false" name="LoansReceivableVarianceInForecastedCollectionPercentageFromPriorQuarterEnd" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_LIBORMember" abstract="true" name="LIBORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_ExpectednetLoanincomeatthetimeofassignment" abstract="false" name="ExpectednetLoanincomeatthetimeofassignment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandNineteenThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandNineteenThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeFiveMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TwoThousandTwentyEightSeniorNotesMember" abstract="true" name="TwoThousandTwentyEightSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2019Member" abstract="true" name="LoansOriginatingIn2019Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_WarehouseFacilityIVMember" abstract="true" name="WarehouseFacilityIVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_EffectiveDeferredIncomeTaxRateReconciliationStateAndLocalIncomeTaxesPercent" abstract="false" name="EffectiveDeferredIncomeTaxRateReconciliationStateAndLocalIncomeTaxesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_PosttermMember" abstract="true" name="PosttermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_OpenMarketMember" abstract="true" name="OpenMarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2014Member" abstract="true" name="LoansOriginatingIn2014Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsRemainderOfYear" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsRemainderOfYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_CurrentPretermMember" abstract="true" name="CurrentPretermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_SecuredFinancingsMember" abstract="true" name="SecuredFinancingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansandLeasesReceivableNetRollForward" abstract="true" name="LoansandLeasesReceivableNetRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_FivePointFourSixPercentCapInterestRateMember" abstract="true" name="FivePointFourSixPercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_Debtfinancingclosedate" abstract="false" name="Debtfinancingclosedate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:dateItemType"/>
  <xs:element id="cacc_NotionalAmount" abstract="false" name="NotionalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansReceivableContractualNetCashFlowsAtAssignment" abstract="false" name="LoansReceivableContractualNetCashFlowsAtAssignment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_TransferofExpectedFutureNetCashFlowsbetweenPrograms" abstract="false" name="TransferofExpectedFutureNetCashFlowsbetweenPrograms" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_WarehouseFacilitiesMember" abstract="true" name="WarehouseFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TwoThousandTwentyOneSeniorNotesMember" abstract="true" name="TwoThousandTwentyOneSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_BuildingsLandPPENet" abstract="false" name="BuildingsLandPPENet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansOriginatingInThePriorYearMember" abstract="true" name="LoansOriginatingInThePriorYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_ScheduleOfAdditionalInformationRelatedToDebtInstrumentsTableTextBlock" abstract="false" name="ScheduleOfAdditionalInformationRelatedToDebtInstrumentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_DescriptionOfBusinessTable" abstract="true" name="DescriptionOfBusinessTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_ScheduleOfAssetBackedDebtInstrumentsTextBlockTableTextBlock" abstract="false" name="ScheduleOfAssetBackedDebtInstrumentsTextBlockTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_TwoThousandTwentyThreeSeniorNotesMember" abstract="true" name="TwoThousandTwentyThreeSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_ScheduleOfConsumerLoansForecastedCollectionPercentageTextBlock" abstract="false" name="ScheduleOfConsumerLoansForecastedCollectionPercentageTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_AdvancesToDealers" abstract="false" name="AdvancesToDealers" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ScheduleOfPercentageOfConsumerLoansAssignedBasedOnUnitVolumesTableTextBlock" abstract="false" name="ScheduleOfPercentageOfConsumerLoansAssignedBasedOnUnitVolumesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2024Member" abstract="true" name="LoansOriginatingIn2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_WarehouseFacilityVMember" abstract="true" name="WarehouseFacilityVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_NetBookValueOfLoansPledgedAsCollateral" abstract="false" name="NetBookValueOfLoansPledgedAsCollateral" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ScheduleOfFutureShareBasedCompensationCostTableTextBlock" abstract="false" name="ScheduleOfFutureShareBasedCompensationCostTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_ExpectedFutureNetCashFlows" abstract="false" name="ExpectedFutureNetCashFlows" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PaymentsForProceedsFromLoansReceivableProgramsAxis" abstract="true" name="PaymentsForProceedsFromLoansReceivableProgramsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_PercentageOfContracts" abstract="false" name="PercentageOfContracts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_ProvisionForCreditLosses" abstract="false" name="ProvisionForCreditLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ScheduleOfReinsuranceActivityTableTextBlock" abstract="false" name="ScheduleOfReinsuranceActivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_TwoThousandTwentySixSeniorNotesMember" abstract="true" name="TwoThousandTwentySixSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingFiveYearsPriorAndBeforeMember" abstract="true" name="LoansOriginatingFiveYearsPriorAndBeforeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PastDueOver90DaysPretermMember" abstract="true" name="PastDueOver90DaysPretermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_ScheduleOfStockAwardsExcludedFromTheComputationOfDilutedNetIncomePerShareTableTextBlock" abstract="false" name="ScheduleOfStockAwardsExcludedFromTheComputationOfDilutedNetIncomePerShareTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_DescriptionOfBusinessLineItems" abstract="true" name="DescriptionOfBusinessLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_AdditionalNumberOfConsumerLoansRequiredToGroupAdvances" abstract="false" name="AdditionalNumberOfConsumerLoansRequiredToGroupAdvances" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cacc_RTPFacilityMember" abstract="true" name="RTPFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_WarehouseFacilityVIIIMember" abstract="true" name="WarehouseFacilityVIIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PaymentHoldbackPercentage" abstract="false" name="PaymentHoldbackPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_WarehouseFacilityIIMember" abstract="true" name="WarehouseFacilityIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_DebtInstrumentAmountAvailableForBorrowing" abstract="false" name="DebtInstrumentAmountAvailableForBorrowing" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_InterestMember" abstract="true" name="InterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PurchaseProgramMember" abstract="true" name="PurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_SummaryOfSignificantAccountingPoliciesLineItems" abstract="true" name="SummaryOfSignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_LoansReceivableVarianceInForecastedCollectionPercentageFromPriorYearEnd" abstract="false" name="LoansReceivableVarianceInForecastedCollectionPercentageFromPriorYearEnd" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_EffectiveLongTermIncomeTaxRateReconciliationPercent" abstract="false" name="EffectiveLongTermIncomeTaxRateReconciliationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_SummaryofProvisionforCreditLossesTableTextBlock" abstract="false" name="SummaryofProvisionforCreditLossesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandNineteenTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandNineteenTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2021Member" abstract="true" name="LoansOriginatingIn2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_NewConsumerLoanAssignmentsMember" abstract="true" name="NewConsumerLoanAssignmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_OriginalNumberOfConsumerLoansRequiredToGroupAdvances" abstract="false" name="OriginalNumberOfConsumerLoansRequiredToGroupAdvances" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
  <xs:element id="cacc_MonthlyServicingFeePerNewerFinancings" abstract="false" name="MonthlyServicingFeePerNewerFinancings" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2022Member" abstract="true" name="LoansOriginatingIn2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PaymentsForProceedsFromLoansReceivableProgramsDomain" abstract="true" name="PaymentsForProceedsFromLoansReceivableProgramsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandNineteenOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandNineteenOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_ForecastChangesMember" abstract="true" name="ForecastChangesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneFourMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PercentageOfCollectionsOnContributedLoans" abstract="false" name="PercentageOfCollectionsOnContributedLoans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_PercentageOfNetBookValueOfLoans" abstract="false" name="PercentageOfNetBookValueOfLoans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_LoansReceivableVarianceInInitialForecastedCollectionPercentage" abstract="false" name="LoansReceivableVarianceInInitialForecastedCollectionPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_EffectiveCurrentAndDeferredIncomeTaxRateReconciliationStateAndLocalIncomeTaxesPercent" abstract="false" name="EffectiveCurrentAndDeferredIncomeTaxRateReconciliationStateAndLocalIncomeTaxesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_CertainLoansAcquiredInTransferAccountedForAsLoansAccretableYieldReclassificationsFromNonaccretableDifferenceForecastChanges" abstract="false" name="CertainLoansAcquiredInTransferAccountedForAsLoansAccretableYieldReclassificationsFromNonaccretableDifferenceForecastChanges" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_DataProcessingEquipmentAndSoftware" abstract="false" name="DataProcessingEquipmentAndSoftware" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansAndLeasesReceivableTransfers" abstract="false" name="LoansAndLeasesReceivableTransfers" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_NumberWarehouseFacilities" abstract="false" name="NumberWarehouseFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cacc_EffectiveCurrentIncomeTaxRateReconciliationStateAndLocalIncomeTaxesPercent" abstract="false" name="EffectiveCurrentIncomeTaxRateReconciliationStateAndLocalIncomeTaxesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_ForecastAdjustmentTableTextBlock" abstract="false" name="ForecastAdjustmentTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_FICOScoreLowerThan650OrNoFICOScoreMember" abstract="true" name="FICOScoreLowerThan650OrNoFICOScoreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_SevenPointFivePercentCapInterestRateMember" abstract="true" name="SevenPointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansReceivableFairValueOfNetCashFlowsAtAssignment" abstract="false" name="LoansReceivableFairValueOfNetCashFlowsAtAssignment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsNextYear" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsNextYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_AdoptionofCECL" abstract="false" name="AdoptionofCECL" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_FinanceChargesRevenue" abstract="false" name="FinanceChargesRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ScheduleOfNewConsumerLoanAssignmentsTableTextBlock" abstract="false" name="ScheduleOfNewConsumerLoanAssignmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="cacc_RestrictedCashAndCashEquivalentsFairValueDisclosure" abstract="false" name="RestrictedCashAndCashEquivalentsFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_PortfolioProgramMember" abstract="true" name="PortfolioProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_NumberOfConsumerLoansRequiredToGroupAdvances" abstract="false" name="NumberOfConsumerLoansRequiredToGroupAdvances" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
  <xs:element id="cacc_ImplementationOfEnhancedForecastingMethodologyMember" abstract="true" name="ImplementationOfEnhancedForecastingMethodologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingFourYearsPriorMember" abstract="true" name="LoansOriginatingFourYearsPriorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_SixPointFivePercentCapInterestRateMember" abstract="true" name="SixPointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_LoansReceivableInitialForecastedCollectionPercentage" abstract="false" name="LoansReceivableInitialForecastedCollectionPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="cacc_LoansOriginatingTwoYearsPriorMember" abstract="true" name="LoansOriginatingTwoYearsPriorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
