Free credit card calculator
See when you could pay off your credit card, how much interest you may pay, and how extra payments can shorten your payoff timeline.
Private by design — your calculation stays on your device.
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APR is an annual rate. This calculator converts it to a simplified monthly rate by dividing APR by 12 and applies that interest before each payment. Part of a payment covers interest and the rest reduces principal. As the balance falls, estimated interest generally falls too.
Credit card issuers may instead use daily periodic rates, average daily balances, statement-cycle timing, fees, and issuer-specific payment rules. Your statement may therefore produce a different result.
An extra payment reduces principal sooner under this model. A lower balance may generate less future interest and could move the estimated payoff date forward. Savings are not guaranteed because actual issuer calculations, fees, purchases, and rate changes may differ.
Answers about credit card payoff time, APR, extra payments, privacy, and calculation limitations.
The estimate depends on your current balance, APR, regular monthly payment, extra payment, and start month. Enter those values to see an estimated payoff date and month-by-month schedule.
This calculator uses a simplified monthly rate: APR divided by 12, applied to the balance before each payment. Issuers may use daily periodic rates, average daily balances, different billing-cycle lengths, fees, and allocation rules, so actual statement interest may differ.
A payment that is only slightly above monthly interest may reduce principal slowly and extend the payoff period. Enter the payment shown on your statement to estimate the timeline under this calculator's assumptions.
Extra payments may reduce principal sooner, which can shorten the payoff period and reduce future interest. The calculator compares your selected plan with making only your regular monthly payment.
It can affect interest when an issuer uses daily balance calculations and receives part of the payment earlier. This calculator models one combined monthly payment and does not simulate payment timing within a billing cycle.
Actual results may differ because of daily interest, statement timing, fees, new purchases, rate changes, payment allocation, promotional periods, and issuer-specific minimum-payment rules.
You can model the balance at 0% APR, but the calculator assumes that rate continues for the full payoff period. It does not model promotional end dates, transfer fees, or a later standard APR.
The calculation runs locally in your browser. The most recent valid calculator inputs may be saved in your browser's local storage so they can be restored, and you can remove them with Reset calculator. These inputs are not sent to analytics.
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Compare Snowball and Avalanche strategies across multiple debts.
The calculator uses monthly interest equal to APR divided by 12, rounds monetary values to cents, applies interest before the monthly payment, and stops when the balance reaches zero. The internal Avalanche strategy is used only to satisfy the shared engine contract; with one debt, Snowball and Avalanche produce the same schedule.
Financial disclaimer: This calculator provides educational estimates and does not constitute financial, legal, tax, or credit advice. Actual issuer calculations and payment rules may differ.