Fixed Payment Credit Card Payoff Calculator

Before you calculate

Use this calculator when you want a simple one-card fixed-payment estimate before comparing broader debt tools. Use Credit Card Payment Plan when you need fixed, minimum-percent, and target-time modes, Debt Payoff when several balances need an ordering plan, DTI when card payments are part of a monthly debt ratio, Payment or Loan Payment for fixed installment-loan assumptions, APR when fees and disclosure rates matter, and CFPB, Regulation Z, issuer agreements, legal sources, debt-counseling sources, or local regulators for real statement disclosures, issuer minimum-payment formulas, payment allocation, fees, promotional balances, hardship plans, legal, regulated-advice, or jurisdiction-specific questions.

Formula summary

The app converts the entered annual rate to a simplified monthly rate with annualRate / 100 / 12 and computes first-month interest as balance * monthlyRate. When the rate is positive, monthlyPayment must exceed first-month interest; otherwise the calculator reports Not available because the modeled balance cannot shrink. If the payment is high enough, the app loops month by month, adds current-month interest before the payment, pays min(monthlyPayment, balance + interest) so the final payment can be smaller than the regular amount, sums total paid and total interest, counts payoff months, rounds payoff years as months / 12, and stops at a 1200-month safety cap.

Worked example

Example: fixed payment, zero rate, and too-low payment

With the default inputs, a $5,000.00 balance, 21.99 percent annual rate, and $250.00 monthly payment produce 26 payoff months, 2.17 payoff years, $6,284.93 total paid, $1,284.93 total interest, and the note Estimate assumes no new card spending or fees. In the zero-rate fixture, a $2,400.00 balance at 0 percent with a $200.00 payment takes 12 months, costs $2,400.00 in total, and adds $0.00 interest. In a too-low-payment scenario, a $5,000.00 balance at 24 percent has $100.00 of first-month interest, so a $100.00 payment returns Not available. A near-interest scenario with a $1,000.00 balance at 24 percent and a $21.00 payment takes 154 months and $2,228.65 of interest in this model.

The examples show why payment size matters and why a payment barely above first-month interest can produce a long payoff estimate. They are not issuer statements, legal repayment disclosures, debt-settlement advice, credit-score forecasts, or recommendations to use a particular payment.

Assumptions

• The calculator models one starting balance, one entered APR assumption, one fixed monthly payment, and no new card spending. It does not model purchases after the start date, annual fees, late fees, cash advances, balance transfers, penalty APRs, promotional rates, deferred-interest plans, multiple APR buckets, grace-period effects, statement cycles, payment due dates, credit reporting, account status, or hardship plans.
• Real credit-card issuers often calculate interest from daily periodic rates and average daily balances. Issuer statements can include multiple APR categories, legal repayment disclosures, payment allocation rules, grace-period details, minimum-payment formulas, fee terms, and account-specific agreement language that this monthly planning model does not reproduce.
• Scoped independent comparator checks pass for overlapping fixed-payment outputs, with internal validation evidence kept outside public copy. CFPB credit-card interest, APR, and grace-period materials are needed before explaining real daily-interest, average-daily-balance, multiple-APR, purchase-grace-period, or statement-interest behavior; Regulation Z section 1026.7 and Appendix M1 are needed before required statement-repayment-disclosure claims; Regulation Z section 1026.53 is needed before payment-allocation claims; and issuer agreements, lender disclosures, legal sources, debt-counseling sources, or local regulators are needed before product-specific, fee, promotional-rate, credit-reporting, hardship-plan, legal, regulated-advice, or jurisdiction-specific claims. Results are educational estimates, not financial, legal, lending, credit, debt-counseling, regulatory, or personalised advice.

Common mistakes to avoid

• Entering a payment that only covers monthly interest. At 24 percent APR on a $5,000.00 balance, first-month interest is $100.00, so a $100.00 payment is not enough to reduce the modeled balance.
• Reading the annual rate input as a full issuer statement method. The app divides APR by 12 for a planning estimate, while many real cards use daily periodic rates, average daily balances, several APR categories, grace-period rules, and account terms.
• Treating the payoff month as a promise, issuer payoff quote, required minimum-payment disclosure, 36-month repayment disclosure, debt-counseling plan, credit-score forecast, or recommendation to make a particular payment.

Methodology and sources

This calculator is an original implementation based on documented formulas, app-specific assumptions, deterministic fixtures, edge cases, rounding policy tests, and internal validation. It is not copied from a single source.

Outputs are checked with deterministic fixtures, edge cases, rounding policy tests, and internal independent comparator checks where overlapping outputs are available. The result remains an educational estimate, not a quote, approval, tax answer, or personalised advice.

Formula version 2026.05.20. The version marks the calculation logic and validation fixture set used for this estimate.

• CFPB APR, credit-card interest, and grace-period materials should be used before copy explains real card APRs, daily periodic rates, average daily balance, multiple APR balances, purchase grace periods, statement interest charges, or why payments made earlier in a cycle can change real interest.
• CFPB Regulation Z section 1026.7 and Appendix M1 should be used before copy discusses required periodic-statement minimum-payment repayment estimates, 36-month repayment disclosures, negative-amortization warnings, total-cost estimates, savings estimates, or statement warning language.
• CFPB Regulation Z section 1026.53 should be used before copy discusses allocation of payments above the required minimum payment, multiple APR balances, secured balances, deferred-interest balances, promotional balances, or last-two-billing-cycle exceptions.
• CFPB credit-card agreement database, issuer agreements, lender disclosures, legal sources, debt-counseling sources, and relevant local regulators should be used before copy makes issuer-specific, product-specific, fee, cash-advance, balance-transfer, promotional-rate, credit-reporting, legal, debt-counseling, regulated-advice, or jurisdiction-specific claims.

Estimate only

The result is educational and is not financial, tax, legal, lending, investment, or regulated advice. Real provider terms, fees, rates, taxes, and personal circumstances can change the final answer.

Formula and help: read the full fixed payment credit card payoff calculator methodology notes.

Related reading

• Credit card payoff basics
• How Calcs.finance validates calculator formulas
• Estimate limitations and not-advice disclaimer

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