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  <xs:element id="cacc_TenYearVestingMember" abstract="true" name="TenYearVestingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_SummaryOfSignificantAccountingPoliciesTable" abstract="true" name="SummaryOfSignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_CumulativePaidClaimsTable" abstract="true" name="CumulativePaidClaimsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_PercentageofClaimsPaidDuringPeriodThreeMember" abstract="true" name="PercentageofClaimsPaidDuringPeriodThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneFourMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ReinsuranceLineItems" abstract="true" name="ReinsuranceLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandSeventeenThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandSeventeenThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandNineteenTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandNineteenTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansDomain" abstract="true" name="LoansDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="cacc_ScheduleofPrincipalDebtOutstandingTableTextBlock" abstract="false" name="ScheduleofPrincipalDebtOutstandingTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_ScheduleOfCompensationCostForShareBasedPaymentArrangementsExpectedFutureCompensationCostByPlanTableTextBlock" abstract="false" name="ScheduleOfCompensationCostForShareBasedPaymentArrangementsExpectedFutureCompensationCostByPlanTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_RestrictedAvailableForSaleSecuritiesPolicyTextBlock" abstract="false" name="RestrictedAvailableForSaleSecuritiesPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_PercentageofClaimsPaidDuringPeriodOneMember" abstract="true" name="PercentageofClaimsPaidDuringPeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_FourYearVestingMember" abstract="true" name="FourYearVestingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_ScheduleOfReinsuranceActivityTableTextBlock" abstract="false" name="ScheduleOfReinsuranceActivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types: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_TermAssetBackedSecuredFinancingsTwoThousandNineteenThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandNineteenThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansReceivableInitialForecastedCollectionPercentage" abstract="false" name="LoansReceivableInitialForecastedCollectionPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandNineteenOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandNineteenOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_NumberWarehouseFacilities" abstract="false" name="NumberWarehouseFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cacc_PastDue1190DaysPreTermMember" abstract="true" name="PastDue1190DaysPreTermMember" 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_NewConsumerLoanAssignments" abstract="false" name="NewConsumerLoanAssignments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_DescriptionOfBusinessLineItems" abstract="true" name="DescriptionOfBusinessLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_RemarketingFeesMember" abstract="true" name="RemarketingFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneOneMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DeferralOfLoanOriginationCosts" abstract="false" name="DeferralOfLoanOriginationCosts" 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_TwoThousandTwentySixSeniorNotesMember" abstract="true" name="TwoThousandTwentySixSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingin2016Member" abstract="true" name="LoansOriginatingin2016Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_PercentageofClaimsPaidDuringPeriodFiveMember" abstract="true" name="PercentageofClaimsPaidDuringPeriodFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansReceivableVarianceInForecastedCollectionPercentageFromTwoYearsPrior" abstract="false" name="LoansReceivableVarianceInForecastedCollectionPercentageFromTwoYearsPrior" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsInFourYears" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsInFourYears" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_SecuredFinancingFairValueDisclosure" abstract="false" name="SecuredFinancingFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandEighteenThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandEighteenThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingin2012Member" abstract="true" name="LoansOriginatingin2012Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ScheduleOfChangesInAccountsNotesLoansAndFinancingReceivableTableTextBlock" abstract="false" name="ScheduleOfChangesInAccountsNotesLoansAndFinancingReceivableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="cacc_SummaryOfChangesInAccretableYieldTableTextBlock" abstract="false" name="SummaryOfChangesInAccretableYieldTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_DealerEnrollmentFeesMember" abstract="false" name="DealerEnrollmentFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_SecuredfinancingsMember" abstract="true" name="SecuredfinancingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_PaymentsForProceedsFromLoansReceivableProgramsDomain" abstract="true" name="PaymentsForProceedsFromLoansReceivableProgramsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_SummaryOfProvisionForCreditLossesTableTextBlock" abstract="false" name="SummaryOfProvisionForCreditLossesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types: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_PercentageofClaimsPaidDuringPeriodFourMember" abstract="true" name="PercentageofClaimsPaidDuringPeriodFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ServiceFeeIncomeAsPercentageOfCollections" abstract="false" name="ServiceFeeIncomeAsPercentageOfCollections" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_UnearnedPremiumMember" abstract="true" name="UnearnedPremiumMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_PercentageOfRevenueFromEnrollmentAndRegistrationFeesInProgram" abstract="false" name="PercentageOfRevenueFromEnrollmentAndRegistrationFeesInProgram" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_ThreeYearVestingMember" abstract="true" name="ThreeYearVestingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansOriginatingin2017Member" abstract="true" name="LoansOriginatingin2017Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ScheduleOfAdditionalInformationRelatedToDebtInstrumentsTableTextBlock" abstract="false" name="ScheduleOfAdditionalInformationRelatedToDebtInstrumentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsAfterFiveYears" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsAfterFiveYears" 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_PercentagePaymentbyPeriodTable" abstract="true" name="PercentagePaymentbyPeriodTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_PurchasedLoansMember" abstract="true" name="PurchasedLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_PercentageofClaimsPaidDuringPeriodTwoMember" abstract="true" name="PercentageofClaimsPaidDuringPeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DebtRelatedCommitmentFeesAndDebtIssuanceCostsPolicyTextBlockPolicyTextBlock" abstract="false" name="DebtRelatedCommitmentFeesAndDebtIssuanceCostsPolicyTextBlockPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_ThresholdToDetermineProbability" abstract="false" name="ThresholdToDetermineProbability" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_LineOfCreditFacilityFutureDecreaseInMaximumBorrowingCapacity" abstract="false" name="LineOfCreditFacilityFutureDecreaseInMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_CumulativePaidClaimsLineItems" abstract="true" name="CumulativePaidClaimsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_ScheduleOfShareBasedCompensationRestrictedStockActivityTableTextBlock" abstract="false" name="ScheduleOfShareBasedCompensationRestrictedStockActivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_WarehouseFacilityIVMember" abstract="true" name="WarehouseFacilityIVMember" 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_AdditionalFivePointFivePercentCapInterestRateMember" abstract="true" name="AdditionalFivePointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ThirdPartyProvidersMember" abstract="true" name="ThirdPartyProvidersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TrustAssetsAndReinsuranceLiabilitiesAxis" abstract="true" name="TrustAssetsAndReinsuranceLiabilitiesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_PercentagePayoutOfIncurredClaimsTableTextBlock" abstract="false" name="PercentagePayoutOfIncurredClaimsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_PastDueOver90DaysPreTermMember" abstract="true" name="PastDueOver90DaysPreTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_GPSSIDFeesMember" abstract="false" name="GPSSIDFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_MonthlyFeePortfolioProgram" abstract="false" name="MonthlyFeePortfolioProgram" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" 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-types:domainItemType"/>
  <xs:element id="cacc_OtherStockRepurchaseProgramMember" abstract="false" name="OtherStockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_OpenMarketMember" abstract="true" name="OpenMarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandEighteenTwoMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandEighteenTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodTotalIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodTotalIntrinsicValue" 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_InterestMember" abstract="true" name="InterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ReinsuranceTable" abstract="true" name="ReinsuranceTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_NumberOfConsumersRequiredToGroupAdvances" abstract="false" name="NumberOfConsumersRequiredToGroupAdvances" nillable="true" xbrli:periodType="duration" 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-types:domainItemType"/>
  <xs:element id="cacc_IncidentYearTwoYearsPriorMember" abstract="true" name="IncidentYearTwoYearsPriorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DilutiveSecuritiesRestrictedStockAndRestrictedStockUnits" abstract="false" name="DilutiveSecuritiesRestrictedStockAndRestrictedStockUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cacc_ScheduleOfPercentageOfConsumerLoansAssignedBasedOnUnitVolumesTableTextBlock" abstract="false" name="ScheduleOfPercentageOfConsumerLoansAssignedBasedOnUnitVolumesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_ScheduleOfTrustAssetsAndReinsuranceLiabilitiesTableTextBlock" abstract="false" name="ScheduleOfTrustAssetsAndReinsuranceLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_PercentagePaymentbyPeriodLineItems" abstract="true" name="PercentagePaymentbyPeriodLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_LoansOriginatingin2013Member" abstract="true" name="LoansOriginatingin2013Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ScheduleOfNewConsumerLoanAssignmentsTableTextBlock" abstract="false" name="ScheduleOfNewConsumerLoanAssignmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_TrustAssetsAndReinsuranceLiabilitiesDomain" abstract="true" name="TrustAssetsAndReinsuranceLiabilitiesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_PercentageOfNewConsumerLoansInUnitVolume" abstract="false" name="PercentageOfNewConsumerLoansInUnitVolume" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_IncidentYearThreeYearsPriorMember" abstract="true" name="IncidentYearThreeYearsPriorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_IncidentYearAxis" abstract="true" name="IncidentYearAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_TwoThousandTwentyFourSeniorNotesMember" abstract="true" name="TwoThousandTwentyFourSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageRemainingContractualTerms" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageRemainingContractualTerms" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <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_PercentageOfNetBookValueOfLoans" abstract="false" name="PercentageOfNetBookValueOfLoans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_MonthlyServicingFeePerFinancing" abstract="false" name="MonthlyServicingFeePerFinancing" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types: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_NetBookValueOfLoansPledgedAsCollateral" abstract="false" name="NetBookValueOfLoansPledgedAsCollateral" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_PaymentsOfDealerHoldback" abstract="false" name="PaymentsOfDealerHoldback" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2021Member" abstract="true" name="LoansOriginatingIn2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_PostTermMember" abstract="true" name="PostTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_NumberOfConsumerLoansAssignedToReceiveAcceleratedDealerHoldbackPayment" abstract="false" name="NumberOfConsumerLoansAssignedToReceiveAcceleratedDealerHoldbackPayment" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
  <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_RevenueFromEnrollmentAndRegistrationFeesInProgram" abstract="false" name="RevenueFromEnrollmentAndRegistrationFeesInProgram" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_AncillaryProductProfitSharingIncomeMember" abstract="true" name="AncillaryProductProfitSharingIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_NumberofPortfolioSegments" abstract="false" name="NumberofPortfolioSegments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <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_PercentageOfContractsWithFICOScoreLowerThan650OrNoFICOScoreMember" abstract="true" name="PercentageOfContractsWithFICOScoreLowerThan650OrNoFICOScoreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_SixPointFivePercentCapInterestRateMember" abstract="true" name="SixPointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_ReinsuranceAbstract" abstract="true" name="ReinsuranceAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_LineOfCreditFacilityAdditionalFutureDecreaseInMaximumBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalFutureDecreaseInMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConvertedWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConvertedWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="cacc_SummaryOfChangesInExpectedNetCashFlowsTableTextBlock" abstract="false" name="SummaryOfChangesInExpectedNetCashFlowsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_PortfolioProgramMember" abstract="true" name="PortfolioProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types: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_ScheduleOfOtherIncomeTableTextBlock" abstract="false" name="ScheduleOfOtherIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_StockRepurchasesTextBlock" abstract="false" name="StockRepurchasesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_FiveYearVestingMember" abstract="true" name="FiveYearVestingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_SixYearVestingMember" abstract="true" name="SixYearVestingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansReceivableVarianceInForecastedCollectionPercentageFromPriorYear" abstract="false" name="LoansReceivableVarianceInForecastedCollectionPercentageFromPriorYear" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_StockOptionsValuationAssumptionsExpectedVolatilityRateMinimum" abstract="false" name="StockOptionsValuationAssumptionsExpectedVolatilityRateMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <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_ExpectedFutureFinanceChargesAtTheTimeOfAssignment" abstract="false" name="ExpectedFutureFinanceChargesAtTheTimeOfAssignment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansOriginatingIn2020Member" abstract="true" name="LoansOriginatingIn2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchasedIncrease" abstract="false" name="StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchasedIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cacc_COVID19AdjustmentMember" abstract="true" name="COVID19AdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermABSFinancingMember" abstract="true" name="TermABSFinancingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_LoansAxis" abstract="true" name="LoansAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_FivePointFivePercentCapInterestRateMember" abstract="true" name="FivePointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_CumulativePaidClaims" abstract="false" name="CumulativePaidClaims" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_PaymentHoldbackPercentage" abstract="false" name="PaymentHoldbackPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_WarehouseFacilityVIMember" abstract="true" name="WarehouseFacilityVIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TermAssetBackedSecuredFinancingsTwoThousandTwentyOneThreeMember" abstract="true" name="TermAssetBackedSecuredFinancingsTwoThousandTwentyOneThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_FinanceChargesPolicyPolicyTextBlock" abstract="false" name="FinanceChargesPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_LoansReceivableForecastedCollectionPercentage" abstract="false" name="LoansReceivableForecastedCollectionPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_DefinedContributionPlanAdditionalEmployerMatchingContributionPercent" abstract="false" name="DefinedContributionPlanAdditionalEmployerMatchingContributionPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_StockOptionsValuationAssumptionsExpectedTermMinimum" abstract="false" name="StockOptionsValuationAssumptionsExpectedTermMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cacc_PercentagePercentagePaymentbyPeriodAxis" abstract="true" name="PercentagePercentagePaymentbyPeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cacc_LoansOriginatingin2014Member" abstract="true" name="LoansOriginatingin2014Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_IncentivePlanMember" abstract="false" name="IncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_NumberOfConsumerLoansAssignedToReceiveDealerHoldbackPayment" abstract="false" name="NumberOfConsumerLoansAssignedToReceiveDealerHoldbackPayment" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cacc_IncidentYearDomain" abstract="true" name="IncidentYearDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_FifteenYearVestingMemberMember" abstract="true" name="FifteenYearVestingMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DealerSupportProductsAndServicesMember" abstract="false" name="DealerSupportProductsAndServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_FinancingReceivableCreditQualityImpairedCreditScoresPercentage" abstract="false" name="FinancingReceivableCreditQualityImpairedCreditScoresPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_PercentagePercentagePaymentbyPeriodDomain" abstract="true" name="PercentagePercentagePaymentbyPeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_PayoutofIncurredClaims" abstract="false" name="PayoutofIncurredClaims" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_CertainLoansAcquiredInTransferAccountedForAsLoansAccretableYieldTransfers" abstract="false" name="CertainLoansAcquiredInTransferAccountedForAsLoansAccretableYieldTransfers" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_ClaimsReserveMember" abstract="true" name="ClaimsReserveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_NewConsumerLoanAssignmentsMember" abstract="true" name="NewConsumerLoanAssignmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_TwoThousandTwentyThreeSeniorNotesMember" abstract="true" name="TwoThousandTwentyThreeSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsNextTwelveMonths" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_DefinedContributionPlanAdditionalEmployerMatchingContributionPercentofMatch" abstract="false" name="DefinedContributionPlanAdditionalEmployerMatchingContributionPercentofMatch" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsInTwoYears" abstract="false" name="EmployeeServiceShareBasedCompensationEstimatedAllocationOfRecognizedPeriodCostsInTwoYears" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_LoansOriginatingin2019Member" abstract="true" name="LoansOriginatingin2019Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_SummaryOfSignificantAccountingPoliciesLineItems" abstract="true" name="SummaryOfSignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cacc_WarehouseFacilityVIIMember" abstract="true" name="WarehouseFacilityVIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_AllowanceforCreditLossesMember" abstract="true" name="AllowanceforCreditLossesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_PercentageOfNewConsumerLoansInDollarVolume" abstract="false" name="PercentageOfNewConsumerLoansInDollarVolume" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_AdditionalSixPointFivePercentCapInterestRateMember" abstract="true" name="AdditionalSixPointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_CumulativePaidClaimsTableTextBlock" abstract="false" name="CumulativePaidClaimsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cacc_SecondAdditionalSixPointFivePercentCapInterestRateMember" abstract="true" name="SecondAdditionalSixPointFivePercentCapInterestRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DealersMember" abstract="true" name="DealersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_IncidentYearPriorYearMember" abstract="true" name="IncidentYearPriorYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DataProcessingEquipmentMember" abstract="false" name="DataProcessingEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_LoansReceivableVarianceInForecastedCollectionPercentageFromInitialForecast" abstract="false" name="LoansReceivableVarianceInForecastedCollectionPercentageFromInitialForecast" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cacc_WarehouseFacilityVMember" abstract="true" name="WarehouseFacilityVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cacc_DebtInstrumentPrincipalOutstanding" abstract="false" name="DebtInstrumentPrincipalOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cacc_DealerLoansMember" abstract="true" name="DealerLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
