Why does paying only the minimum take so long?

Because the minimum is a percent of the balance, so it shrinks as the balance falls. Early on, most of a small minimum payment goes to interest, leaving very little to reduce the balance. On a card at a typical APR, paying only the minimum can take decades and cost more in interest than you originally borrowed. Paying a fixed amount instead keeps the full payment working against the balance.

How much does paying a fixed amount instead of the minimum save?

Often thousands of dollars and many years. Because a fixed payment does not shrink with the balance, more of each payment reduces principal, which cuts the interest charged the next month. This calculator shows the exact interest and time saved versus minimum-only payments for your balance and rate.

What payment do I need to actually make progress?

At a minimum, more than the first month's interest, which is the balance times the APR divided by 12. Any payment at or below that amount never reduces the balance. The more you pay above that line, the faster the balance falls and the less interest you pay overall.

Should I pay off the card or invest instead?

Paying off a high-APR card is a guaranteed, tax-free return equal to the card's rate, which is usually higher than a realistic investment return. For most people, clearing a 20-percent-plus card balance comes before investing beyond any employer retirement match. This tool focuses on the payoff math; weigh it against your full situation.

Credit Card Payoff Calculator

See how fast a fixed monthly payment clears your credit card and what you save versus paying only the minimum, where interest can outlast the balance by decades.

Paying a steady amount each month clears a credit card far faster and cheaper than paying the minimum, because the minimum shrinks as the balance falls and barely outpaces the interest. This calculator shows how many months your planned payment takes and how much interest it costs, then compares that with paying only the percent-of-balance minimum, which can take decades and cost more than the original balance.

X f in

Time to payoff (your payment)

26 months

How long your fixed monthly payment takes to clear the balance.

Total interest (your payment): $1,285.71
Total paid (your payment): $6,285.71
Interest saved vs minimum only: $34,671.53
Time to payoff (minimum only): 817 months
Total interest (minimum only): $35,957.24
First minimum payment: $101.83

Balance over time: your payment vs minimum only

Assumptions

Interest accrues monthly on the balance at the APR divided by 12, rounded to the cent each month (the issuer convention). Your planned payment is treated as a fixed dollar amount applied every month until the balance reaches exactly zero; the final payment is reduced so the balance does not go negative.
The minimum-payment comparison uses a percent-of-balance minimum with a dollar floor: each month's minimum is the greater of the percent of the current balance or the floor, capped at the balance. As the balance falls, the percent minimum shrinks, so the payoff slows down and stretches out, which is the trap the comparison is meant to show.
If your planned payment does not cover even the first month's interest, the balance can never fall, so the payoff time and interest are reported as not applicable rather than as a misleading number. Raise the payment above the first month's interest to get a result.
No new purchases, fees, penalty APRs, or promotional rates are modeled. The APR is assumed fixed for the whole payoff. All figures are nominal dollars and are not adjusted for inflation or taxes.
The comparison chart shows the balance at each year end under your planned payment and under minimum-only payments, so the gap between the two lines is the cost of paying the minimum.
This is an estimate for educational purposes only, not financial advice. Your card's exact minimum-payment formula, fees, and any promotional terms will differ; check your cardholder agreement.

Key terms

Definitions for the terms this calculator uses, in our finance glossary .

How it works

A credit card is a revolving balance, so the payoff is simulated one month at a time. Each month the calculator charges interest on the current balance (the APR divided by 12, rounded to the cent), then subtracts your payment. Whatever is left carries to the next month.

It runs two scenarios so you can see the cost of each:

Your planned payment is a fixed dollar amount you pay every month until the balance reaches zero. Because it does not shrink, more of each payment reduces principal as the balance falls, so the interest charged the next month drops too.
The minimum-only payment is the greater of a percent of the balance or a dollar floor, capped at the balance. As the balance falls, the percent minimum shrinks with it, so the payment gets smaller and smaller and the payoff stretches out for years.

That shrinking minimum is the trap. A typical 2% minimum on a card barely exceeds the monthly interest, so the balance crawls down, and the total interest can end up larger than the amount you originally borrowed.

One guardrail: if your planned payment does not even cover the first month’s interest, the balance can never fall. The calculator reports the payoff as not applicable in that case instead of showing a misleading number, and tells you to raise the payment above the first month’s interest.

Worked example

Take a $5,000 balance at an 18% APR. The first month’s interest is $5,000 times 18% divided by 12, which is $75.00.

Pay a fixed $250 a month:

The card is cleared in 24 months.
Total interest is $989.17.

Now pay only the minimum, the greater of 2% of the balance or $25:

The first payment is $101.50 (2% of the $5,075 balance after the first month’s interest), and it falls from there.
The balance is not cleared for 354 months, about 29.5 years.
Total interest is $11,688.80, more than twice the original balance.

Paying the fixed $250 instead of the minimum saves $10,699.63 in interest and nearly 28 years. The lesson is simple: pay a fixed amount, not the shrinking minimum.

What is included (and what is not)

No new purchases, fees, penalty APRs, or promotional rates are modeled, and the APR is assumed fixed for the whole payoff. Real card minimum-payment formulas vary by issuer; this uses the common percent-of-balance-with-a-floor rule. All figures are nominal dollars and are estimates for education, not advice; check your cardholder agreement for your card’s exact terms.

Sources

Frequently asked questions

Why does paying only the minimum take so long?: Because the minimum is a percent of the balance, so it shrinks as the balance falls. Early on, most of a small minimum payment goes to interest, leaving very little to reduce the balance. On a card at a typical APR, paying only the minimum can take decades and cost more in interest than you originally borrowed. Paying a fixed amount instead keeps the full payment working against the balance.
How much does paying a fixed amount instead of the minimum save?: Often thousands of dollars and many years. Because a fixed payment does not shrink with the balance, more of each payment reduces principal, which cuts the interest charged the next month. This calculator shows the exact interest and time saved versus minimum-only payments for your balance and rate.
What payment do I need to actually make progress?: At a minimum, more than the first month's interest, which is the balance times the APR divided by 12. Any payment at or below that amount never reduces the balance. The more you pay above that line, the faster the balance falls and the less interest you pay overall.
Should I pay off the card or invest instead?: Paying off a high-APR card is a guaranteed, tax-free return equal to the card's rate, which is usually higher than a realistic investment return. For most people, clearing a 20-percent-plus card balance comes before investing beyond any employer retirement match. This tool focuses on the payoff math; weigh it against your full situation.

Related calculators

Learn how this works

New to this topic? Our companion guide explains it in plain language: The Credit Card Minimum Payment Trap (and How to Escape It)

Last reviewed June 2026.