Credit Card Payoff Calculator

Credit card debt is uniquely expensive because of two features working together: high APRs, often above 20%, and minimum payments that barely cover interest. The result is debt that can linger for a decade or more if you pay only the minimum, even as it feels like you're 'keeping up.' It also drags down your debt-to-income ratio the whole time it lingers.

This calculator shows the truth behind a balance: how long it really takes to clear at a given payment, how much of your money goes to interest versus principal, and how dramatically paying a fixed amount above the minimum accelerates the payoff.

How does this calculator work?

Enter your card balance as the loan amount, the APR, and either a payoff term or a monthly payment. It's a solve-for-any-field tool, so you can fix the payment and solve the time, or vice versa.

The calculator builds a full payoff schedule showing how each payment splits between interest and principal, and the total interest you'll pay.

Add an extra monthly payment to see how much faster you'd be debt-free and how much interest you'd save. Paying above the minimum is the single biggest lever on credit card debt.

Two modeling assumptions to know: the calculator assumes you make no new purchases while paying the balance down, and it compounds interest monthly (real cards accrue daily on your average balance, which runs slightly higher, typically well under 1% difference). It also shows what paying only a typical minimum would cost, using the common formula of 1% of the balance plus interest with a $25 floor.

Worked example

Imagine an $8,000 balance at 22% APR. Compare paying a fixed $200/month against paying $350/month.

Balance / APR

$8,000 / 22%

Pay $200/mo: time to clear

~6 yrs 1 mo

Pay $200/mo: total interest

~$6,550

Pay $350/mo: time to clear

~2 yrs 6 mo

Pay $350/mo: total interest

~$2,460

Interest saved by paying more

~$4,090

How the numbers work

At 22% APR the monthly rate is about 1.83%, so the very first month's interest on the $8,000 balance is $8,000 × 1.83% = $146.67. This is the same starting point for both plans.

Pay $200 and only about $53 of it reduces the balance that first month. Pay $350 and $203 goes to principal, which is nearly four times as much. Since every dollar of principal you knock out avoids all the future interest it would have generated, the gap compounds month after month.

The result: the $350 plan clears the card in about 30 months and roughly $2,460 of interest, while the $200 plan drags on for about 73 months and roughly $6,550 of interest.

Raising the monthly payment by $150 clears the same balance about three and a half years sooner and saves roughly $4,100 in interest. That's the power of paying a fixed amount instead of a shrinking minimum.

The trap with minimum payments is that they fall as your balance falls, so the payoff stretches out and interest keeps compounding. Committing to a fixed dollar payment is the single most effective move against card debt.

Why minimum payments keep you in debt

A typical minimum payment is calculated as a small percentage of the balance (often 1–3%) plus the month's interest. Because so little goes to principal, the balance barely moves at first, and since the minimum shrinks along with the balance, the finish line keeps receding. On a high-APR card, paying only the minimum can mean a decade of payments and more in interest than the original purchase.

The fix is to decide on a fixed monthly payment and stick to it even as the balance drops. Each month, more of that constant payment lands on principal, which is why a fixed payment clears debt so much faster than the minimum.

Avalanche vs. snowball for multiple cards

If you carry balances on several cards, two strategies help. The avalanche method directs extra money at the highest-APR card first, which minimizes total interest mathematically. The snowball method targets the smallest balance first for a quick psychological win, then rolls that payment into the next card. Avalanche saves the most money; snowball can be easier to stick with. Either beats spreading extra payments thinly across all cards.

A balance-transfer card with a 0% introductory period, or a personal loan to consolidate at a fixed rate, can also help, but watch the transfer fee and make sure you can clear the balance before the promotional rate expires and the regular APR kicks in.