Credit Card Payoff Calculator — Time & Total Interest

Find out how long a credit card balance really takes to clear, what that costs in interest, and how much worse the minimum-payment route is. Change the monthly payment and watch the numbers move.

Year-by-year progress

How this calculator works

Every month the issuer charges interest on what you still owe, then applies the rest of your payment to the balance. Written out: interest = balance × (APR ÷ 12), principal paid = payment − interest, new balance = balance − principal paid. Repeat until the balance reaches zero. Each row of the year-by-year table below is twelve rounds of exactly that loop.

Two consequences follow from the arithmetic and explain most of the pain. First, interest is charged on the current balance, so any month you pay less than the interest charge your balance grows even while you are paying — the tool flags that case rather than looping forever. Second, the order matters: any extra dollars you pay reduce the base that next month's interest is calculated on, which is why a modest increase in payment can cut the payoff time by far more than the amount suggests.

The minimum-payment comparison uses the common issuer formula of the greater of 2% of the balance or $25, recalculated each month. Because the payment shrinks with the balance, it declines ever more slowly — the long tail you see in the table. The real minimum on your statement may differ, so read it off your own bill.

Getting out faster

The highest-leverage move is simply fixing the monthly amount rather than letting it float with the balance. Pick a number you can sustain for six months, automate it, and re-run the figures. Anything above the interest charge makes progress; anything below lengthens the debt.

Beyond that, three levers change the maths structurally rather than incrementally. A balance transfer or consolidation loan replaces a 20%+ APR with something lower, though you should price the transfer fee (commonly 3% to 5%) against the interest you actually avoid and check when the promotional rate expires. Calling the issuer to request a lower APR often succeeds for customers with a good payment history, and it applies immediately to your existing balance. With several cards, avalanche ordering — highest APR first, minimums elsewhere — minimizes total interest, while snowball ordering trades a little cost for momentum.

Frequently asked questions

How long will it take to pay off my credit card?

Divide the balance by what you can pay, then remember interest rebuilds it each month. An $8,000 balance at 22.9% APR takes 38 months to clear at $300 a month, costing about $3,286 in interest, for a total of roughly $11,286 paid. At $200 a month the same balance takes 77 months and costs about $7,247. That steep jump happens because a smaller payment leaves less to reduce the principal, so more of every subsequent month's payment goes to interest instead.

Why does paying only the minimum cost so much?

Most issuers set the minimum at about 2% of the balance or $25, whichever is larger. On $8,000 that is about $160 a month, and interest at 22.9% consumes a large share of it, so the balance barely moves for many months and declines ever more slowly afterwards. The arithmetic is compounding working against you: the longer the balance stays high, the more interest accrues on it, which keeps it high. Even small permanent increases over the minimum produce outsized savings in both time and dollars. On the $8,000 balance used above, a 2% minimum with a $25 floor would take roughly 182 years and about $143,000 of interest, versus 38 months and $3,286 at $300 a month.

How is credit card interest calculated?

Issuers take your APR, divide it by 365 to get a daily periodic rate, apply it to the daily balance and sum the month's results. An equivalent approximation — and the one used here — divides the APR by 12 and applies it to the current balance, which differs from the daily method by only a few cents in most cases. Purchases normally carry no interest at all if you pay the statement balance in full by the due date; revolved balances and cash advances do, and advances often carry a higher APR with interest starting immediately.

Should I use the avalanche or snowball method?

Avalanche — paying the highest APR card first while making minimum payments on the rest — costs the least and finishes soonest, because you attack the balance charging you the most per dollar. Snowball — clearing the smallest balance first — costs slightly more but delivers a visible win within weeks. Mathematically avalanche wins; behaviourally, whichever method you sustain is the better one. With a single card the choice is irrelevant; just maximize the monthly amount.

Is a balance transfer worth it?

A transfer helps when the promotional rate sits well below your current APR and you can retire most of the balance before it ends. Price it properly: add the transfer fee, usually 3% to 5% of the amount moved, to the interest due during a promo that typically lasts 12 to 21 months, then compare against staying put. Also check whether you lose the grace period on new purchases, since that can silently add interest even while you are paying the transferred balance down.

Does this calculator account for the grace period or new purchases?

No. It models one fixed balance you stop adding to, with interest charged monthly at a constant APR. Real cards add new spending every statement, and no interest accrues on purchases if you pay the statement balance in full each month. If you keep charging while paying down, your actual payoff will take longer and cost more than this estimate — clear the card's future spending first, then use the tool on what remains.

Last updated Oct 6, 2026 — APRs and issuer minimums vary by account, so check your own statement.

Estimates for general information only, not financial advice — see our disclaimer.

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