How this credit card payoff calculator works
Enter your card balance and APR, then choose how you want to plan. With a fixed monthly payment, the calculator shows how many months it takes to reach zero, your debt-free date and the total interest. With a target payoff date, it works backward to the payment you need each month.
Card interest is calculated monthly: the APR is divided by 12 and applied to your balance. Whatever you pay beyond that interest reduces what you owe. We assume you stop using the card for new purchases while you pay it down.
For context, the results also show what happens if you pay only the minimum, using a typical issuer formula. Compare the two and the cost of minimum payments becomes very clear.
The credit card payoff math
Months to payoff with a fixed payment, and the payment needed for a target date, come from the same amortization relationship:
n = −ln(1 − r·B ÷ P) ÷ ln(1 + r) P = B × r ÷ [1 − (1 + r)^−n]
- B = current balance
- r = monthly rate (APR ÷ 12)
- P = monthly payment (must exceed r × B)
- n = number of months to reach zero
- The calculator also simulates every month, which handles the smaller final payment exactly
Worked example
A $6,000 balance at 22.8% APR accrues about $114 of interest in the first month. Pay a fixed $250 a month and the card is paid off in about 33 months, with roughly $2,090 in total interest.
Pay only the typical minimum — interest plus 1% of the balance — and the first payment is about $174, but it shrinks as the balance falls. Payoff takes about 21 years and interest runs to roughly $10,300. To be debt-free in 24 months instead, you'd need about $314 a month.
Why minimum payments keep you in debt
Card issuers set minimums low on purpose: commonly interest plus 1% of the balance, or 2% to 3% of the balance, with a floor of around $25. As your balance drops, so does the minimum, which stretches repayment out for years. Federal rules under the CARD Act require your statement to show how long payoff would take at the minimum and the payment needed to finish in three years — that disclosure is worth reading.
The fix is simple, if not easy: pick a fixed payment and keep paying it even as the minimum falls. Holding the payment steady means every month a larger share goes to principal.
How credit card interest is really charged
Most US cards charge interest daily on your average daily balance, using a daily rate of APR ÷ 365, and bill it monthly. This calculator uses the monthly equivalent, APR ÷ 12, which lands within a few dollars of the daily method over a year. If you pay your statement balance in full by the due date, the grace period means you pay no purchase interest at all — but once you carry a balance, new purchases usually start accruing interest immediately.
Ways to lower the cost
Call your issuer and ask for a lower APR, especially if you've paid on time for a year or more; a few points makes a real difference on a large balance. A 0% balance transfer card can pause interest for 12 to 21 months, but expect a transfer fee of 3% to 5% and divide the balance by the promotional months to find the payment that clears it before the rate resets.
A fixed-rate personal loan can also work if its APR is clearly lower than your card's. Whichever route you choose, it only saves money if the card stays paid down.
Picking a payment you can keep
The best payoff plan is the one you'll follow. Start from a realistic budget, protect a small emergency fund — even $500 to $1,000 prevents new charges when the car breaks down — and commit the rest. Automate the payment for a day or two after payday, and put raises, refunds and side income toward the balance.
If you have more than one card, list them all in our Debt Payoff Planner to compare the avalanche method (highest APR first) with the snowball method (smallest balance first).
Protecting your credit while you pay
Paying down card debt usually helps your credit score because it lowers your utilization — the share of your limits you're using. Keep cards open once they're paid off unless they carry an annual fee you don't want, and never miss a payment; late payments can trigger a penalty APR near 30% and stay on your report for seven years.
Frequently asked questions
Related calculators
Debt Payoff Planner
Compare snowball vs. avalanche across all your debts and get a plan.
Open calculatorPersonal Loan Calculator
Estimate payments and total cost on a personal or consolidation loan.
Open calculatorLoan Calculator
Payment, total interest and payoff date for any fixed-rate loan.
Open calculatorNot financial advice. ClearCalc provides estimates for educational purposes only. Results depend on the assumptions you enter and may differ from offers from lenders or institutions. Consult a qualified professional before making financial decisions.