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Credit Card Payoff Calculator

See exactly how long it will take to pay off your credit card balance and how much interest you'll pay — then discover how much you save by paying a little extra each month.

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Why Credit Card Interest Is So Costly

Credit cards typically carry some of the highest interest rates of any consumer debt — often between 18% and 29% APR. Unlike mortgages or auto loans, most credit cards don't have fixed payoff schedules. The minimum payment is usually just 1–2% of the balance, meaning you could carry a balance for decades while paying far more in interest than the original purchase cost.

The good news is that credit card interest compounds monthly. This means the faster you pay down the balance, the less time interest has to accumulate. Even paying $50 or $100 more per month can save you hundreds of dollars and eliminate the debt a year or two sooner. The Credit Card Payoff Calculator makes this immediately visible so you can make an informed decision about how aggressively to tackle your balance.

If your credit score has improved since you opened the card, consider calling your issuer to request a lower rate, or look into a balance transfer to a 0% introductory APR card. Doing so while using this calculator to maintain a fixed monthly payment can dramatically accelerate your payoff timeline.

Credit Card Payoff Formula

The number of monthly payments to eliminate a credit card balance is:

n = −log(1 − r × B / PMT)log(1 + r)
  • n — Number of months to pay off the balance.
  • B — Current credit card balance.
  • r — Monthly interest rate (APR ÷ 12, as a decimal).
  • PMT — Fixed monthly payment amount.

Each month, interest is calculated on the remaining balance (r × B), and the rest of your payment (PMT − interest) reduces the principal. For the debt to shrink, your payment must exceed the monthly interest charge. At 21% APR, a $5,000 balance accrues about $87 in interest per month — any payment below this will grow the debt regardless of how much you pay.

Example: Paying Off $5,000 at 21% APR

Here is how different monthly payments affect payoff time for a $5,000 credit card balance at 21% APR:

Monthly Payment Months Total Interest Total Paid
$100 (min ~) 94 months $4,368 $9,368
$150 44 months $1,529 $6,529
$200 30 months $948 $5,948
$300 19 months $567 $5,567

Paying just $100/month at 21% APR means you'd pay nearly $4,400 in interest — almost as much as the original balance — over nearly 8 years. Bumping that to $200/month cuts interest by over 78% and gets you debt-free in just 2.5 years. That extra $100/month saves $3,420 in interest.

Values calculated using standard credit card amortization formula. For illustrative purposes only. Assumes no new charges.

Frequently Asked Questions

What is a balance transfer and does it help?

A balance transfer moves your credit card debt to a new card, typically with a 0% introductory APR for 12–21 months. During this period, 100% of your payment goes to principal — dramatically accelerating payoff. Balance transfer cards often charge a fee of 3–5% of the transferred amount. If you can pay off the balance before the introductory period ends, this fee is almost always less than the interest you'd pay otherwise. This calculator can help you confirm that: compare total interest paid normally versus just the transfer fee.

How is credit card interest calculated?

Most credit cards use a Daily Periodic Rate (DPR) = APR ÷ 365. Interest is charged on your Average Daily Balance (ADB) for the billing cycle. So: Interest = ADB × DPR × days in cycle. This means interest compounds daily rather than monthly, making credit card debt slightly more expensive than this calculator models (which uses monthly compounding). The difference is small but real. Always pay in full every month to avoid any interest entirely — the "grace period" means no interest is charged if you pay your full statement balance by the due date.

What credit card APR is considered high?

As of 2024–2025, the average credit card APR in the U.S. was approximately 21–22%, near historic highs. APRs below 15% are generally considered low for a credit card; 15–20% is average; above 24% is high. Store cards and subprime cards often reach 29.99% — the regulatory ceiling. If you carry a balance, any APR above your potential investment return (roughly 7–10% for stocks) means paying down the credit card is a guaranteed better return than investing. Always prioritize high-interest debt elimination before discretionary investing.

Should I close the credit card after paying it off?

Closing a credit card after paying it off can actually hurt your credit score in two ways: it reduces your total available credit (increasing your utilization ratio) and shortens your average account age. Financial experts generally recommend keeping the card open but not using it for purchases, or making one small recurring charge and paying it off monthly to keep it active. If the card has a high annual fee, however, closing it after payoff makes sense. Just be aware of the short-term credit score impact and time any closure accordingly — especially if you plan to apply for a mortgage or major loan soon.

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