Credit Card Payoff Calculator turns your balance, APR, and monthly payment into a projected payoff date, along with total interest cost and the effect of paying extra each month.
Calculate How Fast You Can Pay Off a Credit Card Balance With Extra Payments
This credit card payoff calculator shows how many months it takes to clear a balance, and how much of that time and interest you save by adding an extra payment each month. It’s built for anyone carrying a revolving balance who wants a real number instead of a guess.
Entering Your Balance, APR, and Payments Into the Payoff Calculator
Enter your balance, your card’s APR, your usual monthly payment, and any extra amount you want to add. Pick your currency. The calculator returns your payoff date, total interest, and how much faster you’ll finish by paying extra. It assumes a fixed nominal APR converted to a monthly rate, not APY.
- Typing the APR as a decimal (0.18) instead of a percentage (18) — this shrinks the calculated monthly interest by 100 times and makes the payoff look faster than it really is.
- Putting the extra amount into the “Current Monthly Payment” field instead of the separate extra-payment field — this double-counts the acceleration and skews the months-saved figure.
- Using an old statement balance after new purchases have been added — this understates both the true balance and the real payoff time.
How the Payoff Timeline and Interest Are Calculated
Each month, the calculator follows the same three steps used in the repayment-disclosure method card issuers must use, per Regulation Z, Appendix M1 to Part 1026 (the CFPB rule behind the minimum-payment warning box printed on your statement). First, the annual rate becomes a monthly rate:
$$ r = \frac{APR}{12} $$
Then interest is charged on the balance that month:
$$ Interest = Balance \times r $$
Then your payment covers that interest first, and whatever’s left reduces principal:
$$ Principal\ Paid = Payment – Interest $$
$$ New\ Balance = Balance – Principal\ Paid $$
This repeats until the balance hits $0. A common mix-up here: entering the monthly periodic rate printed on your statement instead of the annual APR the calculator asks for. Doing that overstates monthly interest by roughly 12 times.
The calculator works for any balance above $0 and an APR of 0% or higher. Real-world card APRs mostly fall between 0% (promotional) and the mid-30s, so a rate like 90% is almost certainly a typo. There’s one hard boundary: your total monthly payment must be bigger than that month’s interest charge. If it isn’t, the balance never shrinks, since interest eats the entire payment — the calculator flags this as an unpayable balance instead of showing a fake payoff date.
One detail a generic version of this calculator would skip: many issuers actually charge interest on your average daily balance across the billing cycle, not one balance snapshot per month. This tool uses the simpler single-balance method described above — the same method regulators require for the statement warning box — so your real payoff date may land a few days earlier or later than what’s shown here.
This tool is for estimating and comparing payoff scenarios, not personalized tax, legal, or investment advice — confirm your exact numbers against your card statement before making a repayment plan.
How Extra Payments Shift the Interest-to-Principal Split
Typical Credit Card APRs to Compare Your Rate Against
| Category | Average APR (Q2 2026) |
| All U.S. commercial bank credit card accounts | 20.94% |
| Accounts carrying a balance and assessed interest | 22.15% |
Source: Federal Reserve G.19 Consumer Credit release, Q2 2026 data. These are U.S. commercial bank averages, not your specific rate — check your card statement or agreement for the APR that actually applies to your account, and note this doesn’t reflect any state-specific rate rules.
Common Questions About Paying Off Credit Card Debt Faster
Does my extra payment go toward interest or principal?
Your payment covers that month’s interest first. Whatever’s left reduces principal. Extra payments work because a smaller balance means less interest gets charged next month, which compounds the savings over time.
Why does the calculator say my payoff time is “Infinite”?
Your total monthly payment isn’t covering that month’s interest charge, so the balance can’t shrink. Raise your payment above the interest amount shown, or the balance will keep growing instead of paying down.
Does this calculator include late fees, annual fees, or new purchases?
No. It only projects the balance and rate you enter, assuming no new charges and on-time payments. Adding new purchases or missing a payment will extend your real-world payoff time beyond this estimate.
Will this match the payoff date my card issuer shows me?
It’s a close estimate. Some issuers charge interest on your average daily balance instead of one monthly balance, which can shift your real payoff by a few days in either direction.
Does paying extra always save the same amount of interest?
No. Savings depend on your APR, balance, and how early you start paying extra. Higher rates and earlier extra payments produce bigger interest savings, since a lower balance compounds down faster.