How to calculate credit card payoff
M = B × r ÷ (1 − (1 + r)⁻ⁿ)
Worked example. Pay each month: $314 / month.
Example inputs — Card balance: $6,000; Card APR: 22.9%; Pay off in (months): 24 mo. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Credit card interest compounds monthly at APR ÷ 12. This calculator finds the fixed payment that clears the balance by your chosen date, assuming no new purchases.
Using the credit card payoff estimate
Instead of forecasting a date from a payment, this tool starts with a deadline and finds the level monthly payment needed to clear a card balance. It is a planning estimate for one fixed-rate balance with no new purchases. The required amount can be much higher than a statement minimum, because a minimum payment is not necessarily designed to clear the debt by your chosen date.
Step-by-step inputs
- Card balance. Use the balance you intend to pay off. Separate promotional balances or balances with different rates if one APR does not describe the whole card. Starting example: $6,000 .
- Card APR. Enter the annual card APR. This model applies APR divided by 12 each month; actual card interest often depends on daily balances and transaction types. Starting example: 22.9% .
- Pay off in (months). Choose the number of monthly payments available before your target date. The result assumes that payment schedule starts without an additional delay. Starting example: 24 mo.
Worked example with the starting values
Using the starting inputs, the estimate is Pay each month: $314 / month.
The same installment is calculated to cover monthly interest and clear principal by the target month. Total interest is total modeled installments minus the starting balance. Any new purchase, annual fee or rate change can require a revised payment.
- Total interest
- $1,535
- Total paid
- $7,535
Compare pay off in (months) scenarios
All other inputs stay at their starting values. These are modeled comparisons, not quotes, predictions or individual recommendations.
| Pay off in (months) | Pay each month |
|---|---|
| 12 mo | $564 / month |
| 24 mo | $314 / month |
| 36 mo | $232 / month |
Make a useful comparison
Test a shorter deadline and compare both payment and total interest. Faster repayment can reduce the interest bill, but the larger monthly commitment must fit alongside all required bills. A deadline you cannot sustain is less useful than a workable plan with regular progress.
If considering a balance transfer, model the transferred principal including any fee and use a realistic period for the promotional rate. A single fixed APR cannot represent a promotional period followed by a much higher rate; separate those phases rather than assuming the promotional rate lasts forever.
Check the card statement after each cycle. Payments, new charges, posting dates and daily interest can create differences from a monthly model. Update the balance periodically and avoid treating a rounded estimate as an exact payoff instruction.
Common mistakes to avoid
- A card's minimum payment and this fixed deadline payment are different quantities. Entering the minimum as though it meets the selected target can leave a balance at the end.
- Cash advances and some transfers may use different APRs or fee rules. Combining them under one percentage can hide important costs.
- Do not assume there is a purchase grace period while carrying a balance. The calculator does not evaluate your card's statement rules.
Assumptions & limitations
- Fixed rate and on-time payments.
- Excludes origination fees, late fees and penalties unless entered.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Should I only pay the minimum?
Minimum payments can stretch a balance over many years and multiply the interest you pay. Paying a fixed higher amount is almost always cheaper.
Does this include new purchases?
No. The payment clears the entered balance under a fixed-rate assumption. New spending needs separate repayment or a new scenario.
Why might the statement interest differ?
Card issuers may use daily balances, specific posting dates, fees and more than one APR. The calculator uses a simplified monthly rate.
