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    <link:label id="lab_us-gaap_SalesRevenueNet_E2A88A86740FC13C76C9A15DD77CBCBC_label_en-US" xlink:label="lab_us-gaap_SalesRevenueNet_E2A88A86740FC13C76C9A15DD77CBCBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Net</link:label>
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    <link:label id="lab_us-gaap_CostOfRevenueAbstract_250C7F5A932B0E35FB65A15DD77CF066_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfRevenueAbstract_250C7F5A932B0E35FB65A15DD77CF066" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of revenue:</link:label>
    <link:label id="lab_us-gaap_CostOfRevenueAbstract_250C7F5A932B0E35FB65A15DD77CF066_label_en-US" xlink:label="lab_us-gaap_CostOfRevenueAbstract_250C7F5A932B0E35FB65A15DD77CF066" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Revenue [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfRevenueAbstract" xlink:label="loc_us-gaap_CostOfRevenueAbstract_250C7F5A932B0E35FB65A15DD77CF066" xlink:type="locator" />
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    <link:label id="lab_pmtc_LicenseandSubscriptionCost_9BCE45BC157F65D6E52CA15DD77DB974_terseLabel_en-US" xlink:label="lab_pmtc_LicenseandSubscriptionCost_9BCE45BC157F65D6E52CA15DD77DB974" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of license and subscription revenue</link:label>
    <link:label id="lab_pmtc_LicenseandSubscriptionCost_9BCE45BC157F65D6E52CA15DD77DB974_label_en-US" xlink:label="lab_pmtc_LicenseandSubscriptionCost_9BCE45BC157F65D6E52CA15DD77DB974" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">License and Subscription Cost</link:label>
    <link:label id="lab_pmtc_LicenseandSubscriptionCost_9BCE45BC157F65D6E52CA15DD77DB974_documentation_en-US" xlink:label="lab_pmtc_LicenseandSubscriptionCost_9BCE45BC157F65D6E52CA15DD77DB974" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">License and Subscription Cost</link:label>
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    <link:label id="lab_us-gaap_MaintenanceCosts_C5A832B586EF8580AC48A15DD77DF6B6_label_en-US" xlink:label="lab_us-gaap_MaintenanceCosts_C5A832B586EF8580AC48A15DD77DF6B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maintenance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaintenanceCosts" xlink:label="loc_us-gaap_MaintenanceCosts_C5A832B586EF8580AC48A15DD77DF6B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaintenanceCosts_C5A832B586EF8580AC48A15DD77DF6B6" xlink:to="lab_us-gaap_MaintenanceCosts_C5A832B586EF8580AC48A15DD77DF6B6" xlink:type="arc" />
    <link:label id="lab_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E_totalLabel_en-US" xlink:label="lab_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cost of software revenue</link:label>
    <link:label id="lab_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E_label_en-US" xlink:label="lab_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subscription Support and License Cost</link:label>
    <link:label id="lab_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E_documentation_en-US" xlink:label="lab_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subscription Support and License Cost</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_SubscriptionSupportandLicenseCost" xlink:label="loc_pmtc_SubscriptionSupportandLicenseCost_3F4132B4BB4CB11A908EA15DD77D233E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787_terseLabel_en-US" xlink:label="lab_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of professional services revenue</link:label>
    <link:label id="lab_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787_label_en-US" xlink:label="lab_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Technology Services Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TechnologyServicesCosts" xlink:label="loc_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787" xlink:to="lab_us-gaap_TechnologyServicesCosts_5185E1FDA1FA1A546A57A15DD77DF787" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostOfRevenue_F870F7A12F85B698F33AA15DD77D3A0E_totalLabel_en-US" xlink:label="lab_us-gaap_CostOfRevenue_F870F7A12F85B698F33AA15DD77D3A0E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cost of revenue</link:label>
    <link:label id="lab_us-gaap_CostOfRevenue_F870F7A12F85B698F33AA15DD77D3A0E_label_en-US" xlink:label="lab_us-gaap_CostOfRevenue_F870F7A12F85B698F33AA15DD77D3A0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Revenue</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_F870F7A12F85B698F33AA15DD77D3A0E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GrossProfit_746D2CE968BAC1A44712A15DD77DA9C8_totalLabel_en-US" xlink:label="lab_us-gaap_GrossProfit_746D2CE968BAC1A44712A15DD77DA9C8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Gross margin</link:label>
    <link:label id="lab_us-gaap_GrossProfit_746D2CE968BAC1A44712A15DD77DA9C8_label_en-US" xlink:label="lab_us-gaap_GrossProfit_746D2CE968BAC1A44712A15DD77DA9C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gross Profit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_746D2CE968BAC1A44712A15DD77DA9C8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SellingAndMarketingExpense_D58B6FFF408AB96D9044A15DD77DB479_terseLabel_en-US" xlink:label="lab_us-gaap_SellingAndMarketingExpense_D58B6FFF408AB96D9044A15DD77DB479" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales and marketing</link:label>
    <link:label id="lab_us-gaap_SellingAndMarketingExpense_D58B6FFF408AB96D9044A15DD77DB479_label_en-US" xlink:label="lab_us-gaap_SellingAndMarketingExpense_D58B6FFF408AB96D9044A15DD77DB479" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selling and Marketing Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_D58B6FFF408AB96D9044A15DD77DB479" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ResearchAndDevelopmentExpense_C1F63D2494C9B9E4BBB5A15DD77D2787_terseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpense_C1F63D2494C9B9E4BBB5A15DD77D2787" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Research and development</link:label>
    <link:label id="lab_us-gaap_ResearchAndDevelopmentExpense_C1F63D2494C9B9E4BBB5A15DD77D2787_label_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpense_C1F63D2494C9B9E4BBB5A15DD77D2787" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research and Development Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_C1F63D2494C9B9E4BBB5A15DD77D2787" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_8FBA1210CCB9DD5C02B2A15DD77DDE9D_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_8FBA1210CCB9DD5C02B2A15DD77DDE9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General and administrative</link:label>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_8FBA1210CCB9DD5C02B2A15DD77DDE9D_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_8FBA1210CCB9DD5C02B2A15DD77DDE9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General and Administrative Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_8FBA1210CCB9DD5C02B2A15DD77DDE9D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_BF242A1422B24E9CC95AA15DD77D067B_negatedNetLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_BF242A1422B24E9CC95AA15DD77D067B" xlink:role="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="resource" xml:lang="en-US">U.S. pension settlement loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_BF242A1422B24E9CC95AA15DD77D067B" xlink:type="locator" />
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    <link:label id="lab_pmtc_AmortizationOfAcquiredIntangibleAssetsExcludingPurchasedSoftware_57E2257496B421B45A83A15DD77D8FF9_terseLabel_en-US" xlink:label="lab_pmtc_AmortizationOfAcquiredIntangibleAssetsExcludingPurchasedSoftware_57E2257496B421B45A83A15DD77D8FF9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of acquired intangible assets</link:label>
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    <link:label id="lab_pmtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalFairValueOfRestrictedStockAndRestrictedStockUnitAwardsVested_1CEF113349D407F7C8962F5089F4D1F6_documentation_en-US" xlink:label="lab_pmtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalFairValueOfRestrictedStockAndRestrictedStockUnitAwardsVested_1CEF113349D407F7C8962F5089F4D1F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement By Share-based Payment Award, Options, Exercises In Period, Total Fair Value Of Restricted Stock And Restricted Stock Unit Awards Vested</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalFairValueOfRestrictedStockAndRestrictedStockUnitAwardsVested" xlink:label="loc_pmtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalFairValueOfRestrictedStockAndRestrictedStockUnitAwardsVested_1CEF113349D407F7C8962F5089F4D1F6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_2C842C0FCBA53C87C1DCA640E9FA7DAF_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_2C842C0FCBA53C87C1DCA640E9FA7DAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combinations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_2C842C0FCBA53C87C1DCA640E9FA7DAF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_B72BA0992350AC5D3EBAA640E9FA4D57_label_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_B72BA0992350AC5D3EBAA640E9FA4D57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_B72BA0992350AC5D3EBAA640E9FA4D57" xlink:type="locator" />
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    <link:label id="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904_terseLabel_en-US" xlink:label="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ColdLight [Member]</link:label>
    <link:label id="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904_label_en-US" xlink:label="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired entity name: ColdLight [Member]</link:label>
    <link:label id="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904_documentation_en-US" xlink:label="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired entity name: ColdLight [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_AcquiredentitynameColdLightMember" xlink:label="loc_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904" xlink:to="lab_pmtc_AcquiredentitynameColdLightMember_3DC37690AC25BC0AEDD6A640E9FAC904" xlink:type="arc" />
    <link:label id="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD_terseLabel_en-US" xlink:label="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vuforia [Member]</link:label>
    <link:label id="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD_label_en-US" xlink:label="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired entity name: Vuforia [Member]</link:label>
    <link:label id="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD_documentation_en-US" xlink:label="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired entity name: Vuforia [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_AcquiredentitynameVuforiaMember" xlink:label="loc_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD" xlink:to="lab_pmtc_AcquiredentitynameVuforiaMember_559852D6B4D043E5D31EA640E9FAA0BD" xlink:type="arc" />
    <link:label id="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64_terseLabel_en-US" xlink:label="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kepware [Member]</link:label>
    <link:label id="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64_label_en-US" xlink:label="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired entity name: Kepware [Member]</link:label>
    <link:label id="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64_documentation_en-US" xlink:label="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired entity name: Kepware [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_AcquiredentitynameKepwareMember" xlink:label="loc_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64" xlink:to="lab_pmtc_AcquiredentitynameKepwareMember_D527662B2EB67F836BB2A640E9FA1D64" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120" xlink:to="lab_us-gaap_BusinessAcquisitionLineItems_0E3019820E81A5639826A640E9FAF120" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D_label_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Acquired During Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D" xlink:to="lab_us-gaap_GoodwillAcquiredDuringPeriod_CA569519DDC5C553D30AA640E9FA158D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66_verboseLabel_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Identifiable intangible assets</link:label>
    <link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66_label_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-lived Intangible Assets Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66" xlink:to="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_8CD60FCBA3E8CC38C6DDA640E9FA0E66" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash</link:label>
    <link:label id="lab_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D_label_en-US" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Acquired from Acquisition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D" xlink:to="lab_us-gaap_CashAcquiredFromAcquisition_5BE9D67808C292F9D78DA640E9FA6D1D" xlink:type="arc" />
    <link:label id="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7_terseLabel_en-US" xlink:label="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets and liabilities, net</link:label>
    <link:label id="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7_label_en-US" xlink:label="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business acquisition, acquired net assets excluding goodwill, intangible assets and cash</link:label>
    <link:label id="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7_documentation_en-US" xlink:label="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business acquisition, acquired net assets excluding goodwill, intangible assets and cash</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash" xlink:label="loc_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7" xlink:to="lab_pmtc_Businessacquisitionacquirednetassetsexcludinggoodwillintangibleassetsandcash_8D795FADF1E3EB631E07A640E9FA2CA7" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total allocation of purchase price consideration</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_02D86D8C5F7A6668BF2CA640E9FB819C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAcquiredFromAcquisition_C7C05C9C2187EB243A88A640E9FB283E_negatedNetLabel_en-US" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_C7C05C9C2187EB243A88A640E9FB283E" xlink:role="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="resource" xml:lang="en-US">Less: cash acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_C7C05C9C2187EB243A88A640E9FB283E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAcquiredFromAcquisition_C7C05C9C2187EB243A88A640E9FB283E" xlink:to="lab_us-gaap_CashAcquiredFromAcquisition_C7C05C9C2187EB243A88A640E9FB283E" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationConsiderationTransferred1_A2F660B586B3F21D5939A640E9FBAFDF_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_A2F660B586B3F21D5939A640E9FBAFDF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total purchase price allocation, net of cash acquired</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationConsiderationTransferred1_A2F660B586B3F21D5939A640E9FBAFDF_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_A2F660B586B3F21D5939A640E9FBAFDF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Consideration Transferred</link:label>
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    <link:label id="lab_pmtc_DebtInstrumentNumberofBanksinCreditFacility_0A96D54FB9F6E1AF1456A6AC5A50A20E_terseLabel_en-US" xlink:label="lab_pmtc_DebtInstrumentNumberofBanksinCreditFacility_0A96D54FB9F6E1AF1456A6AC5A50A20E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of banks in credit agreement</link:label>
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    <link:label id="lab_pmtc_ComponentOfBaseRateBasisSpreadOnAdjustedLibor_EBBBD1A6C14DC01A4BE4A6AC5A56129D_terseLabel_en-US" xlink:label="lab_pmtc_ComponentOfBaseRateBasisSpreadOnAdjustedLibor_EBBBD1A6C14DC01A4BE4A6AC5A56129D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit facility, revolving loan, basis spread on adjusted LIBOR</link:label>
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    <link:label id="lab_pmtc_ComponentOfBaseRateBasisSpreadOnAdjustedLibor_EBBBD1A6C14DC01A4BE4A6AC5A56129D_documentation_en-US" xlink:label="lab_pmtc_ComponentOfBaseRateBasisSpreadOnAdjustedLibor_EBBBD1A6C14DC01A4BE4A6AC5A56129D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Component of Base Rate, Basis Spread on Adjusted LIBOR</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_9ACFA8A4EA5856E2B6ACA6AC5A56C2DA_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_9ACFA8A4EA5856E2B6ACA6AC5A56C2DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit facility, revolving loan, commitment fees percentage</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_9ACFA8A4EA5856E2B6ACA6AC5A56C2DA_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_9ACFA8A4EA5856E2B6ACA6AC5A56C2DA" 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>
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    <link:label id="lab_pmtc_InvestmentInForeignSubsidiariesAuthorizedAmount_9BC6FA3C2D79226F8B48A6AC5A56AB6E_terseLabel_en-US" xlink:label="lab_pmtc_InvestmentInForeignSubsidiariesAuthorizedAmount_9BC6FA3C2D79226F8B48A6AC5A56AB6E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment limit in foreign subsidiaries</link:label>
    <link:label id="lab_pmtc_InvestmentInForeignSubsidiariesAuthorizedAmount_9BC6FA3C2D79226F8B48A6AC5A56AB6E_label_en-US" xlink:label="lab_pmtc_InvestmentInForeignSubsidiariesAuthorizedAmount_9BC6FA3C2D79226F8B48A6AC5A56AB6E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment in Foreign Subsidiaries Authorized Amount</link:label>
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    <link:label id="lab_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618_terseLabel_en-US" xlink:label="lab_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash investment limit for acquisition of business</link:label>
    <link:label id="lab_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618_label_en-US" xlink:label="lab_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Investment Limit For Acquisition of Business</link:label>
    <link:label id="lab_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618_documentation_en-US" xlink:label="lab_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Investment Limit For Acquisition of Business</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_CashInvestmentLimitForAcquisitionOfBusiness" xlink:label="loc_pmtc_CashInvestmentLimitForAcquisitionOfBusiness_013E0CB8C415985D910BA6AC5A578618" xlink:type="locator" />
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    <link:label id="lab_pmtc_DebtInstrumentCovenantComplianceLeverageRatioFour_519086575B96C785C016A6AC5A57B61C_terseLabel_en-US" xlink:label="lab_pmtc_DebtInstrumentCovenantComplianceLeverageRatioFour_519086575B96C785C016A6AC5A57B61C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum leverage ratio allowed under debt covenant</link:label>
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    <link:label id="lab_pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatio_CF3B1A667C08E219638CA6AC5A57B725_documentation_en-US" xlink:label="lab_pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatio_CF3B1A667C08E219638CA6AC5A57B725" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Compliance, Senior Debt Leverage Ratio</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatio" xlink:label="loc_pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatio_CF3B1A667C08E219638CA6AC5A57B725" xlink:type="locator" />
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    <link:label id="lab_pmtc_DebtCovenantFixedChargeCoverageRatioMinimum_A34B9503C67ABCE9479DA6AC5A5717E6_terseLabel_en-US" xlink:label="lab_pmtc_DebtCovenantFixedChargeCoverageRatioMinimum_A34B9503C67ABCE9479DA6AC5A5717E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum fixed charge coverage ratio allowed under debt covenant</link:label>
    <link:label id="lab_pmtc_DebtCovenantFixedChargeCoverageRatioMinimum_A34B9503C67ABCE9479DA6AC5A5717E6_label_en-US" xlink:label="lab_pmtc_DebtCovenantFixedChargeCoverageRatioMinimum_A34B9503C67ABCE9479DA6AC5A5717E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Covenant, Fixed Charge Coverage Ratio, Minimum</link:label>
    <link:label id="lab_pmtc_DebtCovenantFixedChargeCoverageRatioMinimum_A34B9503C67ABCE9479DA6AC5A5717E6_documentation_en-US" xlink:label="lab_pmtc_DebtCovenantFixedChargeCoverageRatioMinimum_A34B9503C67ABCE9479DA6AC5A5717E6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consolidated trailing four quarters EBITDA less capital expenditures to consolidated fixed charges</link:label>
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    <link:label id="lab_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140_terseLabel_en-US" xlink:label="lab_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leverage ratio, actual</link:label>
    <link:label id="lab_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140_label_en-US" xlink:label="lab_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leverage Ratio, Actual</link:label>
    <link:label id="lab_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140_documentation_en-US" xlink:label="lab_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Actual leverage ratio -- metric for determining compliance with debt covenant</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_LeverageRatioActual" xlink:label="loc_pmtc_LeverageRatioActual_AACE69279AE1A4105480A6AC5A572140" xlink:type="locator" />
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    <link:label id="lab_pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatioactual_7BC29897ED882A6C692AA6AC5A570704_terseLabel_en-US" xlink:label="lab_pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatioactual_7BC29897ED882A6C692AA6AC5A570704" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Compliance, Senior Debt Leverage Ratio, actual</link:label>
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    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatioactual" xlink:label="loc_pmtc_DebtInstrumentCovenantComplianceSeniorDebtLeverageRatioactual_7BC29897ED882A6C692AA6AC5A570704" xlink:type="locator" />
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    <link:label id="lab_pmtc_FixedChargeCoverageRatioActual_413E54BA936ADE02D703A6AC5A57CEB6_terseLabel_en-US" xlink:label="lab_pmtc_FixedChargeCoverageRatioActual_413E54BA936ADE02D703A6AC5A57CEB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed charge coverage ratio, actual</link:label>
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    <link:label id="lab_pmtc_FixedChargeCoverageRatioActual_413E54BA936ADE02D703A6AC5A57CEB6_documentation_en-US" xlink:label="lab_pmtc_FixedChargeCoverageRatioActual_413E54BA936ADE02D703A6AC5A57CEB6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Actual fixed charge coverage ratio -- metric for determining debt covenant compliance</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_FixedChargeCoverageRatioActual" xlink:label="loc_pmtc_FixedChargeCoverageRatioActual_413E54BA936ADE02D703A6AC5A57CEB6" xlink:type="locator" />
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    <link:label id="lab_pmtc_SolutionsGroupMember_C4DFA9BC1DA516B14004395E36837210_documentation_en-US" xlink:label="lab_pmtc_SolutionsGroupMember_C4DFA9BC1DA516B14004395E36837210" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Solutions Group [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_SolutionsGroupMember" xlink:label="loc_pmtc_SolutionsGroupMember_C4DFA9BC1DA516B14004395E36837210" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_SolutionsGroupMember_C4DFA9BC1DA516B14004395E36837210" xlink:to="lab_pmtc_SolutionsGroupMember_C4DFA9BC1DA516B14004395E36837210" xlink:type="arc" />
    <link:label id="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54_terseLabel_en-US" xlink:label="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IoT Group [Member]</link:label>
    <link:label id="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54_label_en-US" xlink:label="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IoT Group [Member]</link:label>
    <link:label id="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54_documentation_en-US" xlink:label="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IoT Group [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_IoTGroupMember" xlink:label="loc_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54" xlink:to="lab_pmtc_IoTGroupMember_547FB5123854A97C4A5B395E3683BE54" xlink:type="arc" />
    <link:label id="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7_terseLabel_en-US" xlink:label="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional Services [Member]</link:label>
    <link:label id="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7_label_en-US" xlink:label="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional Services [Member]</link:label>
    <link:label id="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7_documentation_en-US" xlink:label="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Professional Services [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_ProfessionalServicesMember" xlink:label="loc_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7" xlink:to="lab_pmtc_ProfessionalServicesMember_0F6CBC45B6AD8DA4C5A1395E36832CA7" xlink:type="arc" />
    <link:label id="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D_terseLabel_en-US" xlink:label="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Software Products [Member]</link:label>
    <link:label id="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D_label_en-US" xlink:label="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment, Software Products [Member]</link:label>
    <link:label id="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D_documentation_en-US" xlink:label="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Segment, Software Products [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_SegmentSoftwareProductsMember" xlink:label="loc_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D" xlink:to="lab_pmtc_SegmentSoftwareProductsMember_8CDCDD9B26F6454917EE395E3684129D" xlink:type="arc" />
    <link:label id="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7_terseLabel_en-US" xlink:label="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Services [Member]</link:label>
    <link:label id="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7_label_en-US" xlink:label="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment, Services [Member]</link:label>
    <link:label id="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7_documentation_en-US" xlink:label="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Segment, Services [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_SegmentServicesMember" xlink:label="loc_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7" xlink:to="lab_pmtc_SegmentServicesMember_1763EEF72F6A2AFF360D395E3684DFF7" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of reportable segments</link:label>
    <link:label id="lab_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Reportable Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B" xlink:to="lab_us-gaap_NumberOfReportableSegments_B09AE260D1CCB7B72B3D395E3684A80B" xlink:type="arc" />
    <link:label id="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A_terseLabel_en-US" xlink:label="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill and acquired intangible assets</link:label>
    <link:label id="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A_label_en-US" xlink:label="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill And Acquired Intangible Assets By Reportable Segment</link:label>
    <link:label id="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A_documentation_en-US" xlink:label="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Goodwill and Acquired Intangible Assets by Reportable Segment</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment" xlink:label="loc_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A" xlink:to="lab_pmtc_GoodwillAndAcquiredIntangibleAssetsByReportableSegment_EFCC84F3A11C4903A1C2395E3684FB8A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated aggregate future amortization expense for intangible assets, 2016</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_296491FFE10982ABBD1F395E3684D7CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated aggregate future amortization expense for intangible assets, 2018</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A1A71376A48F659F4F59395E36845FCB" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated aggregate future amortization expense for intangible assets, 2019</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7A34AACB509827592BD8395E3684337B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_D353F3C08C7EED07AA0D3960242F4571" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated aggregate future amortization expense for intangible assets, 2020</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_DA3B7E8BDA0D24C32842395E36845CFC" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated aggregate future amortization expense for intangible assets, thereafter</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_66C9C988BDDF09CF3D85395E36849CB2" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_76A4D2B2E441A8D4CB68DB0534F70F06_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract_76A4D2B2E441A8D4CB68DB0534F70F06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
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    <link:label id="lab_pmtc_NotionalamountofforeigncurrencyderivativecontractAbstract_841D82FDA7A3E0E72E6EA6C10F1A8267_label_en-US" xlink:label="lab_pmtc_NotionalamountofforeigncurrencyderivativecontractAbstract_841D82FDA7A3E0E72E6EA6C10F1A8267" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">notional amount of foreign currency derivative contract [Abstract]</link:label>
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    <link:label id="lab_currency_EUR_F8FC911AF9B842C8027CA6C10F202376_terseLabel_en-US" xlink:label="lab_currency_EUR_F8FC911AF9B842C8027CA6C10F202376" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Euro/U.S. Dollar</link:label>
    <link:label id="lab_currency_EUR_F8FC911AF9B842C8027CA6C10F202376_label_en-US" xlink:label="lab_currency_EUR_F8FC911AF9B842C8027CA6C10F202376" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Euro Member Countries, Euro</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_EUR" xlink:label="loc_currency_EUR_F8FC911AF9B842C8027CA6C10F202376" xlink:type="locator" />
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    <link:label id="lab_currency_ILS_FBE37E9C051D1D4EED3BA6C10F204F44_terseLabel_en-US" xlink:label="lab_currency_ILS_FBE37E9C051D1D4EED3BA6C10F204F44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Israeli Sheqel/U.S. Dollar</link:label>
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    <link:label id="lab_pmtc_JapaneseYentoEuroMember_C5C52E69E8F054B2E30FA6CE5BBC2C60_terseLabel_en-US" xlink:label="lab_pmtc_JapaneseYentoEuroMember_C5C52E69E8F054B2E30FA6CE5BBC2C60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Japanese Yen/Euro</link:label>
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    <link:label id="lab_pmtc_JapaneseYentoEuroMember_C5C52E69E8F054B2E30FA6CE5BBC2C60_documentation_en-US" xlink:label="lab_pmtc_JapaneseYentoEuroMember_C5C52E69E8F054B2E30FA6CE5BBC2C60" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Japanese Yen to Euro [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_JapaneseYentoEuroMember" xlink:label="loc_pmtc_JapaneseYentoEuroMember_C5C52E69E8F054B2E30FA6CE5BBC2C60" xlink:type="locator" />
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    <link:label id="lab_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887_terseLabel_en-US" xlink:label="lab_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Japanese Yen/U.S. Dollar</link:label>
    <link:label id="lab_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887_label_en-US" xlink:label="lab_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Japan, Yen</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_JPY" xlink:label="loc_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887" xlink:to="lab_currency_JPY_972BEDA105AB8B4AB8B8A6C10F217887" xlink:type="arc" />
    <link:label id="lab_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE_terseLabel_en-US" xlink:label="lab_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Swiss Franc / Euro</link:label>
    <link:label id="lab_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE_label_en-US" xlink:label="lab_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Swiss Franc to Euro [Member]</link:label>
    <link:label id="lab_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE_documentation_en-US" xlink:label="lab_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Swiss Franc to Euro [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_SwissFranctoEuroMember" xlink:label="loc_pmtc_SwissFranctoEuroMember_6FA0A3D4522F93821D79A6C10F21D3AE" xlink:type="locator" />
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    <link:label id="lab_currency_SEK_20E01DA5BFDA225B8412A6C10F21DE2E_terseLabel_en-US" xlink:label="lab_currency_SEK_20E01DA5BFDA225B8412A6C10F21DE2E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SEK / U.S. Dollar</link:label>
    <link:label id="lab_currency_SEK_20E01DA5BFDA225B8412A6C10F21DE2E_label_en-US" xlink:label="lab_currency_SEK_20E01DA5BFDA225B8412A6C10F21DE2E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sweden, Kronor</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_SEK" xlink:label="loc_currency_SEK_20E01DA5BFDA225B8412A6C10F21DE2E" xlink:type="locator" />
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    <link:label id="lab_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1_terseLabel_en-US" xlink:label="lab_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Chinese Yuan offshore / Euro</link:label>
    <link:label id="lab_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1_label_en-US" xlink:label="lab_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Chinese Yuan offshore to Euro [Member]</link:label>
    <link:label id="lab_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1_documentation_en-US" xlink:label="lab_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Chinese Yuan offshore to Euro [Member]</link:label>
    <link:loc xlink:href="pmtc-20170930.xsd#pmtc_ChineseYuanoffshoretoEuroMember" xlink:label="loc_pmtc_ChineseYuanoffshoretoEuroMember_BE6157D7AF5EB8BD5361A6CDAEAC21C1" xlink:type="locator" />
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    <link:label id="lab_currency_SGD_77293013119C7CBC0349A6C10F2197C9_terseLabel_en-US" xlink:label="lab_currency_SGD_77293013119C7CBC0349A6C10F2197C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Singapore Dollar / U.S. Dollar</link:label>
    <link:label id="lab_currency_SGD_77293013119C7CBC0349A6C10F2197C9_label_en-US" xlink:label="lab_currency_SGD_77293013119C7CBC0349A6C10F2197C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Singapore, Dollars</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_SGD" xlink:label="loc_currency_SGD_77293013119C7CBC0349A6C10F2197C9" xlink:type="locator" />
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    <link:label id="lab_pmtc_AllOtherMember_38BE3F147A09BD91453DA6C10F21CAE1_terseLabel_en-US" xlink:label="lab_pmtc_AllOtherMember_38BE3F147A09BD91453DA6C10F21CAE1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All other</link:label>
    <link:label id="lab_pmtc_AllOtherMember_38BE3F147A09BD91453DA6C10F21CAE1_label_en-US" xlink:label="lab_pmtc_AllOtherMember_38BE3F147A09BD91453DA6C10F21CAE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Other [Member]</link:label>
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    <link:label id="lab_invest_DerivativeNotionalAmount_EED30727320B86E78298A6C10F217C89_terseLabel_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_EED30727320B86E78298A6C10F217C89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:label id="lab_invest_DerivativeNotionalAmount_EED30727320B86E78298A6C10F217C89_label_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_EED30727320B86E78298A6C10F217C89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_EED30727320B86E78298A6C10F217C89" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FD4616C0786A49F6251A16D8955A8FE_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FD4616C0786A49F6251A16D8955A8FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from operating activities:</link:label>
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    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_2A30332F11BD2DE28B62A16D895B175E_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_2A30332F11BD2DE28B62A16D895B175E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Benefit from deferred income taxes</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_F230240AA96D3F8E8112A16D895C5C9C_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_F230240AA96D3F8E8112A16D895C5C9C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable</link:label>
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