{"version":"2026.06-credit-card-interest-drag","name":"SwitchWize Credit Card Interest Drag Index","snapshotDate":"June 30, 2026","benchmark":{"accountsAssessedInterestApr":21.5},"marketContext":{"revolvingCreditOutstanding":1348688300000,"sources":[{"label":"Federal Reserve FRED checkable deposits series BOGZ1FL193020005Q","url":"https://fred.stlouisfed.org/series/BOGZ1FL193020005Q"},{"label":"Federal Reserve G.19 consumer credit","url":"https://www.federalreserve.gov/releases/g19/current/default.htm"}]},"scenarios":[{"slug":"minimum-payment-cost","label":"Minimum payment cost","balance":5000,"apr":21.5,"monthlyPayment":150,"firstYearInterest":999,"monthlyInterestAtStart":90,"monthsToPayoff":52,"totalInterest":2682,"payoffPossible":true},{"slug":"apr-vs-rewards","label":"APR vs rewards","balance":3000,"apr":21.5,"monthlyPayment":300,"firstYearInterest":336,"monthlyInterestAtStart":54,"monthsToPayoff":12,"totalInterest":336,"payoffPossible":true},{"slug":"balance-transfer-payback","label":"Balance transfer payback","balance":8000,"apr":21.5,"monthlyPayment":450,"firstYearInterest":1335,"monthlyInterestAtStart":143,"monthsToPayoff":22,"totalInterest":1719,"payoffPossible":true}],"methodology":{"summary":"The Credit Card Interest Drag Index estimates finance-charge drag from carrying revolving balances at a benchmark credit-card APR.","formula":"monthly balance accrual using APR / 12 until the modeled payment retires the balance","caveat":"Actual card APRs, fees, grace periods, promotional rates, and payment allocation rules vary by issuer."}}