Credit card minimum payment calculator

See how long a balance really takes to clear on the minimum — and how the formula your card uses, plus the dollar floor underneath it, decides whether that's two decades or never.

How the math works

A minimum payment isn't one formula. Cards use one of two, and the choice is the whole story. The first takes a flat slice of the balance. The second covers the month's interest in full and adds a slice of the principal on top.

Each month the balance accrues interest at the monthly rate — the APR divided by 12. The payment covers that interest first; whatever is left pays down principal. Then the cycle repeats on the new, smaller balance, which means the next minimum is smaller too. That shrinking payment is why minimum-only payoff drags on.

The flat method has a trap. At the 22.76% U.S. average APR, the monthly rate is about 1.9%. A flat 2%-of-balance minimum is barely above that, so almost the entire payment is interest and the principal moves at a crawl. The interest-plus-1% method always retires at least 1% of principal on top of the interest, so it actually makes progress.

Worked example

Take a balance of $6,500 on a card charging the U.S. average APR of 22.76%. Pay the minimum under the interest-plus-1% formula, with a $25 floor.

The first minimum is $188.28. It clears the balance in 258 months — 21 years and 6 months — and costs $11,243.50 in interest. That's more interest than the original balance. The statement's own minimum-payment warning box is the rare piece of finance marketing that undersells how bad the product is.

Now pay a fixed $300 a month instead — about $112 more than that first minimum, held flat rather than allowed to shrink. The balance clears in 29 months — 2 years and 5 months — for $1,950.55 in interest. The extra hundred-odd dollars a month saves $9,292.95 and nineteen years.

Switch the same balance to a flat 2%-of-balance minimum and the calculator says it never clears. That isn't a glitch. At this APR a 2% minimum is so close to the interest line that the balance would outlast the borrower.

When this calculator is wrong

Paying the minimum is the single most expensive routine financial decision a typical household can make. At the 22.76% average APR, the interest paid on a minimum-only payoff exceeds the amount borrowed. Anything above the minimum saves more than its weight in interest. The exception is narrow: if cash is genuinely scarce and you're about to apply for a mortgage, minimum payments preserve the credit score, which matters more than the interest math in that one window. That's a stopgap, not a plan.

Beyond that, here is where the number on the screen drifts from your statement:

• Your card may use the other formula. Pick the wrong one and the payoff estimate is off by years. If you don't know which your issuer uses, the cardholder agreement spells it out — look for "interest, fees, and 1% of the balance" versus a flat percentage.
• The floor is doing the heavy lifting at the end. A pure percentage minimum is asymptotic — it approaches zero without reaching it. The $25 to $35 dollar floor is what finally retires the last stretch, which is why the payoff suddenly speeds up near the finish. Calculators that ignore the floor either run forever or quietly cap the answer.
• It assumes no new spending. Every dollar charged after the statement resets the math. The model only works on a card you've stopped using.
• It ignores fees and a promotional rate ending. A late fee or a 0% intro APR expiring changes both the balance and the rate the day it lands, and the projection won't know.

What to do with the result

If the minimum-only payoff comes back in years rather than months, the practical move is to fix the payment in dollars and never let it shrink. Set an automatic transfer for the largest fixed amount you can hold steady. Holding a payment flat is what converts a 21-year payoff into a two-year one — the worked example above is the whole argument.

If you're carrying balances on more than one card, the payoff math points to ordering them: highest APR first saves the most interest. That's a different calculation, and the avalanche-versus-snowball question is worth running before you decide where the fixed payment goes.

Common questions

How is my credit card minimum payment calculated?

It's the greater of a percentage and a dollar floor. Most large U.S. issuers use the month's interest and fees plus about 1% of principal; some use a flat percentage of the balance, commonly 2%. The floor, usually $25 to $35, takes over once the percentage falls below it.

Why does paying the minimum take so long?

Because the minimum shrinks as the balance falls, so the share going to principal shrinks too. Early on, almost the whole payment is interest. At a 22.76% APR a flat 2% minimum barely outruns the interest at all, which is how a balance can take more than two decades — or never — to clear.

Does paying only the minimum hurt my credit score?

Paying the minimum on time keeps the account current, which protects payment history. But carrying the balance keeps your credit utilization high, and utilization is a large part of the score. So the minimum protects one signal while quietly damaging another.

What happens if I pay more than the minimum?

Everything above the minimum goes straight to principal, since the interest is already covered. That's why a modest fixed payment beats the minimum so badly: paying $300 instead of a $188 minimum on a $6,500 balance cuts the payoff from 21 years to roughly two and saves over $9,000.

Can a minimum payment ever fail to pay off the card?

A pure percentage minimum never mathematically reaches zero — it just gets smaller. In practice the dollar floor ends it. Federal rules also bar issuers from setting a minimum so low the balance grows, so a real card won't leave you underwater, even if a hypothetical in this calculator can.