Calculator
Credit Card Payoff Calculator With Extra Payments
Use this credit card payoff calculator to see how long it could take to clear one card balance with a fixed monthly payment, how much interest you would pay and your estimated debt-free month. Add an optional extra payment to compare how much faster you could pay off the card and how much interest you could save.
Results are estimates for planning. Many card issuers calculate interest daily and set their own minimum payment, so check your statement for the exact payoff amount.
Your Payoff Plan
Defaults are examples, not payment recommendations. Dollar amounts are currency-neutral; no conversion is performed.
How Credit Card Payoff Is Estimated
The model uses one constant APR and adds interest before each monthly payment. It is deliberately simpler than a credit card statement: the CFPB explains that many issuers calculate interest using daily balances. Your actual payoff quote may differ.
Monthly interest = starting balance × (APR ÷ 100 ÷ 12)
Inputs are rounded to cents, then each month's interest is rounded to the nearest cent, half up. The payment is the smaller of your combined fixed payment and the balance plus interest. The remaining balance never goes below zero. APR supports up to six decimal places.
The starting month is the first payment month, after one modeled month of interest. Calendar days, time zones, and month lengths do not affect charges. Estimates are limited to 1,200 monthly payments and December 9999.
Worked Example
A $1,000 balance at 12% APR with a $400 fixed monthly payment and no extra payment takes three payments in this approximation. The first month adds $10.00 interest, leaving $610.00 after payment. The second adds $6.10, leaving $216.10. The third adds $2.16; the final payment is capped at $218.26. Total paid is $1,018.26, including $18.26 interest.
How Extra Payments Shorten Your Payoff
Use a payment you can maintain, while checking the minimum required on your statement. This calculator does not determine that minimum or model a declining minimum-payment formula. A payment at or below the first month's rounded interest does not reduce the debt.
Extra payments are added every month, not once. Savings compare two otherwise identical fixed-payment plans. If the base payment cannot be projected, only the combined plan is shown and numeric savings are unavailable. A payoff beyond the projection limit is not proof that debt can never be repaid.
Even a small extra payment goes straight to principal, so less interest builds up each month. For example, a $5,000 balance at 22% APR:
- Paying $150 a month takes 52 payments and costs $2,798.09 in interest.
- Paying $200 a month ($50 extra) takes 34 payments and costs $1,749.90 in interest.
That extra $50 a month clears the card 18 months sooner and saves $1,048.19 in interest. Enter your own balance and APR to see your numbers.
Fixed Payment vs Minimum Payment
Card issuers usually calculate the minimum payment as a small percentage of your balance, so the minimum falls as the balance falls and payoff can take many years. This calculator uses a fixed payment that stays the same each month, which is how most payoff plans work.
If you can only pay the minimum today, use the minimum shown on your statement as a starting point, then test a slightly higher fixed amount to see the difference in time and interest.
Assumptions and Limitations
No new purchases, annual fees, late fees, variable APRs, promotional-rate expiry, grace periods, missed payments, or daily compounding are modeled. Multiple cards and balances carrying different APRs need separate consideration. Dollar symbols are a display convention, not currency conversion or a country-specific lending rule.
Trust and methodology
How This Calculator Is Reviewed
- Calculation type
- Fixed-payment credit card payoff estimate
- Jurisdiction
- Currency-neutral educational approximation
- Calculation rules
- APR / 12 monthly approximation; half-up cent rounding
- Last reviewed
- 2026-11-02
An educational monthly approximation, not financial advice or a lender payoff quote. Dollar labels do not perform currency conversion.
Primary Sources
- How does my credit card company calculate the amount of interest I owe?Consumer Financial Protection BureauMany issuers use daily balances; this tool instead discloses a simplified monthly model, not an issuer formula.
- Paying off your credit cardFinancial Consumer Agency of CanadaEducational context for minimum payments and paying more; no issuer-specific minimum-payment rules are modeled.
Known Limitations
- Daily compounding, daily balances, billing-cycle lengths and grace periods are excluded.
- No new purchases, fees, missed payments, multiple APRs or rate changes are modeled.
- Fixed payments are not the issuer's changing minimum-payment formula.
- The first payment occurs in the selected starting month after one modeled interest period; dates are month-level estimates.
- Projections stop at 1,200 payments or December 9999. Money inputs are limited to one billion and APR to 100% with six decimal places.
Found a calculation issue, outdated source, accessibility problem, or unclear assumption? Contact us.
Frequently Asked Questions
How is credit card payoff calculated?
Each month, the calculator adds interest equal to the starting balance multiplied by APR divided by 100 and then by 12, rounded to cents. It subtracts your fixed payment plus any extra payment. The last payment is capped at the balance plus that month's interest.
Is this the same interest method as my credit card statement?
Not necessarily. Many issuers use daily balances and daily interest. This is a monthly approximation, not a statement reconstruction or payoff quote. Payment dates, grace periods, and issuer rounding can change actual charges.
What if my payment is too small?
If the combined payment does not exceed the first month's rounded interest, the balance will not decline in this model. The calculator asks for a higher payment. Projections longer than 1,200 months are also not displayed.
Can I use a 0% APR?
Yes. With zero APR, every payment reduces principal. A promotional rate is assumed to last until payoff; a future rate increase is not modeled.
How are extra-payment savings compared?
The comparison uses the same balance, APR, and starting month, first with the base fixed payment and then with the extra amount added every month. If the base plan cannot be projected, numeric savings are unavailable even if the extra-payment plan succeeds.
Is this a minimum-payment calculator?
No. Enter a fixed payment you intend to make each month, not a changing percentage-based minimum. This tool does not determine your issuer's required minimum payment.
What does the starting month mean?
It is the month of your first payment, after one modeled month of interest. The payoff date is an estimated month and year, not a contractual due date. Calendar month lengths do not affect interest in this approximation.
Does this include purchases, fees, or multiple APRs?
No. It assumes one balance, one constant APR, no new purchases, no fees, and regular end-of-month payments. It does not model daily compounding, balance transfers, missed payments, or changing rates.
Which currency should I use?
Dollar symbols are a display convention. Enter every amount in the same currency. The calculator does not convert currencies or apply country-specific credit card rules.
How long will it take to pay off $5,000 on a credit card?
It depends on your APR and payment. At 22% APR, paying $150 a month takes 52 payments, while paying $200 a month takes 34 payments. Enter your balance, APR and payment above to see your own payoff month.
Does paying extra on a credit card save interest?
Yes. Extra money reduces the balance that interest is charged on. On a $5,000 balance at 22% APR, raising the payment from $150 to $200 a month saves $1,048.19 in interest in this model.
Can I use this calculator for more than one credit card?
The calculator models one balance at one APR. For several cards, run each card separately, or add the balances together only if they share the same APR.
Related calculators
More Financial Tools
Thinking about a consolidation loan? Compare the monthly payment and total interest with our loan calculator, and check the loan's APR before you apply.
Explore Related Planning Tools
Comparing secured borrowing? Try the Auto Loan Calculator or Mortgage Calculator. Their assumptions differ from this credit card model.