Credit card payoff calculator

Pick a date you want the balance gone, and this solves for the monthly payment. Or enter a payment and get the date. Real APRs, real amortization, no marketing nonsense.

How the math works

A credit card is a loan you amortize yourself. Interest accrues each month on the balance, your payment covers that interest first, and whatever is left knocks down principal. To find the fixed payment that clears the balance by a chosen date, the calculator uses the standard amortized-payment formula.

Where P is the balance, i is the monthly rate (APR divided by 12), and n is the number of months you want to be done in. In payment mode the calculator rearranges the same relationship and solves for n instead: n = −ln(1 − i × P / PMT) / ln(1 + i).

One number sets the floor for everything: the first month's interest, P × i. Any payment at or below that figure never touches principal, so the balance holds or climbs. On a $6,500 balance at 22.76% APR, that floor is about $123 a month. Pay less and the card is mathematically unpayable, no matter how many years you give it.

Worked example

Take the U.S. average credit card APR of 22.76% on a $6,500 balance. You want it gone in 24 months. The calculator returns a payment of $339.65 a month. Over those two years you pay $8,151.66 in total — $1,651.66 of it interest.

Now change only the deadline. Cut it to 12 months and the payment climbs to $610.74, but total interest drops to $828.92 — roughly half. Stretch it to 36 months and the payment eases to $250.80, while interest rises to $2,528.83. Same balance, same rate. The date you pick is the single biggest lever on what the debt costs.

Flip to payment mode and the trade is just as blunt. Paying a flat $300 a month against that $6,500 takes 29 months and costs $1,950.55 in interest. Forty dollars more a month buys back five months and about three hundred dollars.

When this calculator is wrong

The payoff date this tool gives you is a projection off one balance that only goes down. Two things break that assumption, and the top-ranking payoff calculators mention neither.

• New charges void the date. Every figure here assumes you never put another dollar on the card. Keep using it and each new purchase resets the arithmetic — you can make the exact payment the calculator asked for and watch the balance sit still. A payoff plan and an active spending card are two different accounts pretending to be one. If you're paying the card down, the card stops being a payment method until it's at zero.
• Deferred-interest promotions are a different animal. Store cards advertising "no interest if paid in full by" a date are not the same as a true 0% APR. Interest still accrues in the background the whole time. Miss the deadline by a day — or leave a single dollar of the original purchase unpaid — and the lender charges every month of that deferred interest retroactively, on the full original balance. A payoff calculator using a flat APR will quietly understate a deferred-interest debt, then be catastrophically wrong at the finish line. On those offers, the only safe target is paid-in-full before the promo ends, with margin to spare.
• The minimum payment is not this payment. The number here is a fixed dollar amount you hold flat. A card's stated minimum shrinks as the balance falls, which is exactly why minimum-only payoff drags on for decades. If you set your payment to the minimum and forget it, you are not on this schedule.
• Rates on cards are variable. Most card APRs float with the prime rate. If the rate moves mid-payoff, the required payment moves with it, and a fixed payment set today lands early or late.

On the debt itself, the arithmetic is not subtle. At the average 22.76% APR, a credit card is the highest-return, lowest-risk investment most households have access to: every dollar paid toward it earns a guaranteed 22.76%, tax-free. Nothing in a brokerage account competes with that.

What to do with the result

Pick the shortest deadline whose payment you can actually cover every month without falling back onto the card. The interest saved between a 36-month and a 12-month payoff on the example above is $1,699.91 — real money that goes to you instead of the issuer, for the price of a larger payment you sustain for a shorter time.

If even the longest realistic deadline produces a payment you can't hit, the payment is the wrong tool and the rate is the problem. A balance transfer to a genuine 0% APR card, or a fixed-rate consolidation loan below 22.76%, changes the i in the formula — which does more than any payment schedule can. Run that math before you commit to a multi-year plan at the full card rate.

Common questions

How much should I pay to clear my card in a year?

Enter your balance and APR, set the deadline to 12 months, and read the payment. On a $6,500 balance at 22.76% APR it's $610.74 a month. The shorter the deadline, the higher the payment and the lower the total interest.

Why does the calculator say my payment will never pay off the card?

Because it's at or below the monthly interest. On a $6,500 balance at 22.76%, the first month's interest is about $123. A payment under that never reduces principal, so the balance holds or grows no matter how long you keep at it. Raise the payment above the interest floor and the card becomes payable.

Does paying more than the minimum actually help?

Substantially. The stated minimum shrinks as the balance falls, which stretches payoff over decades and piles on interest. A fixed payment held flat — even a modest one above the minimum — clears the card in a fraction of the time. The gap between the two is where the interest lives.

Is a "0% if paid in full" store card the same as 0% APR?

No. A true 0% APR charges no interest during the promo and, if a balance remains after, only charges interest going forward. A deferred-interest offer accrues interest the whole time and bills all of it retroactively on the original balance if you don't pay in full by the deadline. Treat the two as different products.

Should I invest instead of paying the card off faster?

At 22.76% APR, no. Paying the card down is a guaranteed, tax-free return equal to the APR. The long-run stock market average is about 10.2% nominal — less than half the card rate, and not guaranteed. Clear high-rate card debt first, then invest.