Credit Card Payoff Calculator
Find out how long it will take to clear a credit card balance.
What is the Credit Card Payoff Calculator?
A credit card payoff calculator works out how long it will take to clear a balance given your APR and a fixed monthly payment, and how much interest you'll pay along the way. It works by simulating each month: interest is calculated on the remaining balance at the monthly rate (APR ÷ 12), that interest is added to what you owe, and your payment is applied first to interest then to the remaining capital — this repeats until the balance reaches zero. To check it roughly by hand, work out your monthly interest cost (balance × APR ÷ 12) and confirm your payment comfortably exceeds it — if your payment is below that figure, the balance will never clear, since all of it (or more) goes on interest alone.
How it works
Unlike a loan with a fixed term, credit card payoff time depends on your balance, interest rate, and how much you pay each month — a fixed monthly payment amount determines how many months it takes to clear the balance, rather than the other way around. Each month, interest is added to the remaining balance, and your payment covers that interest first, with the rest reducing the balance itself — this calculator works through that month by month until the balance reaches zero.
UK context
Credit card interest rates are typically much higher than mortgage or personal loan rates, which is exactly why paying only the minimum payment can take years and cost far more in interest than the original balance — a genuinely important thing to see clearly rather than just intuit.
Tips
- If your monthly payment barely covers the interest being charged, the balance will barely reduce (or not reduce at all) — check that your payment is meaningfully above the interest-only amount.
- Paying more than the minimum, even by a modest fixed amount each month, dramatically reduces both the payoff time and total interest paid over a high-rate card balance.
- If you're carrying a balance across multiple cards, a 0% balance transfer card (if you qualify) can pause interest accumulation while you pay down the principal — though transfer fees apply.
Frequently asked questions
Why does paying only the minimum take so long to clear a balance?
Minimum payments on many cards are set low enough that a large portion goes towards interest rather than the principal balance, especially early on — this is exactly why credit card debt can persist for years even with regular minimum payments.
What happens if my payment doesn't cover the interest?
If your monthly payment is less than the interest being charged that month, the balance will actually grow rather than shrink — this calculator flags that situation so you know your payment needs to increase.
Does credit card interest compound daily or monthly?
It varies by card provider — some compound daily, others monthly, which affects the exact total interest paid. This calculator uses a standard monthly compounding assumption; check your specific card's terms for the precise method used.
A quick note
Assumes a fixed monthly payment and no further spending on the card. Real-world interest calculation methods (daily vs monthly compounding) vary by provider — check your card's specific terms for an exact figure.