Two people owe $5,000 at 19.99 percent APR. One pays $200 a month. The other pays $400. The first is debt-free in 33 months having paid $6,600 in total, which means $1,600 of interest. The second finishes in 15 months having paid $6,000 in total, which means $1,000 of interest. Same debt, same rate, and the only variable is the monthly payment, yet doubling the payment saves $600 of interest and 18 months of carrying the debt. That is the whole argument of this calculator in one paragraph: the payment you choose matters more than the rate you complain about, and a fixed dollar amount in your budget beats a vague intention to pay more someday.

How this calculator walks your balance to zero.

Each month, interest accrues on the balance at one twelfth of your APR, your payment lands, and the balance falls by whatever is left after interest. The calculator repeats that walk until the balance hits zero and reports the months it took, the total paid, and the total interest. The formula behind it solves for the number of months from your balance, your monthly rate, and your payment, rounding up to a whole month, which is why the last month's payment in real life is usually smaller than the regular payment and the total paid is a slight overstatement of the final bill. One check comes first, before any plan: your payment must exceed the first month's interest, or the balance grows instead of shrinking. On a $5,000 balance at 19.99 percent, the first month's interest is $83.29, so a $200 payment clears it comfortably, but an $80 payment does not, and no payoff plan can start from a payment below the interest line. If your payment barely covers interest, the honest answer is that the debt is growing, and the payment has to rise before anything else is worth discussing.

Worked example one: the $5,000 payment ladder.

Run the same $5,000 balance at 19.99 percent APR at five different payments and the ladder tells the whole story. At $150 a month, payoff takes 50 months, total paid is $7,500, and interest is $2,500. At $200 a month, payoff takes 33 months, total paid is $6,600, and interest is $1,600. At $250 a month, payoff takes 25 months, total paid is $6,250, and interest is $1,250. At $300 a month, payoff takes 20 months, total paid is $6,000, and interest is $1,000. At $400 a month, payoff takes 15 months, total paid is $6,000, and interest is $1,000. Two lessons hide in that ladder. First, the early dollars of extra payment buy the most time: moving from $150 to $200 saves 17 months, while moving from $300 to $400 saves only 5 months, because once the payment is large relative to the interest, the balance falls fast no matter what. Second, $300 and $400 both land at $6,000 total paid in this rounded model, which is an artifact of rounding up to whole months, not a promise that the last month costs the same; the $400 plan still finishes five months sooner, and five months of freedom from a card is worth something no interest figure captures.

Worked example two: an $8,000 balance at 22.99 percent.

A larger balance at a higher rate is where minimum-style payments turn punishing. At $200 a month, an $8,000 balance at 22.99 percent takes 77 months to clear, with $15,400 paid in total and $7,400 of interest, nearly doubling the original debt. Raise the payment to $300 a month and the same balance clears in 38 months, with $11,400 paid in total and $3,400 of interest. That extra $100 a month saves $4,000 of interest and 39 months of payments. If you want that balance gone in three years, the payment the amortization math requires is about $309.64 a month, so budget $310 and check it here: $310 clears the balance in exactly 36 months, while $300 leaves you two months past the deadline. This is how to use the calculator backward. Pick the date you want to be debt-free, solve for the payment that gets you there, round it up, and then decide whether that payment fits your budget before you promise yourself the date.

Worked example three: two more balances, two different lessons.

A $2,500 balance at 24.99 percent APR with a $100 monthly payment clears in 36 months, with $3,600 paid in total and $1,100 of interest. The rate is the highest in this article, but the balance is small, so the interest bill stays modest and the timeline stays inside three years. A $12,000 balance at 17.99 percent APR with a $300 monthly payment takes 62 months, with $18,600 paid in total and $6,600 of interest. The rate is the lowest in this article, but the balance is the largest, so the interest bill is the biggest. Rate alone never tells you the cost; balance times rate times time does. That is why a payoff plan starts with a list of every card, its balance, its APR, and its minimum, not with a single card in isolation. This calculator models one card at a time, so run each card separately, write the months and interest down, and then decide the order in which to attack them.

Avalanche, snowball, and the order that actually gets finished.

With several cards, two orders dominate the advice. The avalanche method pays minimums everywhere and throws every extra dollar at the highest APR first, then rolls that payment into the next highest APR. It minimizes total interest mathematically, because it kills the fastest-growing balance first. The snowball method pays minimums everywhere and throws every extra dollar at the smallest balance first, then rolls that payment into the next smallest balance. It costs a little more interest, but it clears a whole card sooner, and that early win is what keeps many people paying long enough to finish. Take three cards: $8,000 at 22.99 percent, $5,000 at 19.99 percent, and $12,000 at 17.99 percent. Avalanche attacks the $8,000 card first. Snowball attacks the $5,000 card first. The interest difference between the two orders on balances like these is usually a few hundred dollars over several years, not thousands, which is why the honest advice is to pick the order you will actually stick with for years. A mathematically perfect plan abandoned in month four saves nothing. A slightly costlier plan finished in month forty saves everything. Whichever order you choose, the mechanics are the same: minimums on every card, every spare dollar on the focus card, and when a card clears, its whole payment rolls into the next card instead of evaporating into spending.

The minimum-payment trap, stated plainly.

This calculator uses the fixed payment you enter, and that is not how a real card minimum works. A typical card minimum falls as the balance falls, often to a percentage of the balance plus interest, with a small floor, so the payment shrinks every month and the tail of the payoff stretches for years. A fixed $200 payment on a $5,000 balance clears it in 33 months. A declining minimum on the same balance can stretch the same debt across far more years and far more interest, because each shrinking payment leaves more balance to keep accruing interest. That is the trap built into the minimum: it is designed to keep the account current, not to get you out of debt. If you can only afford the minimum right now, pay it on time every month and treat it as a holding pattern, not a plan, and the moment your budget frees even $25 or $50, put it on the focus card. Small, fixed, extra payments are the cheapest months you will ever buy.

Balance transfers: the arithmetic, and the catch.

Moving a balance to a 0 percent introductory APR card can be the fastest cheap win available, if the arithmetic is done before the transfer, not after. Take the $5,000 balance at 19.99 percent. A transfer with a 3 percent fee costs $150 up front. At 0 percent for 18 months, clearing $5,000 in 18 months requires about $278 a month, and $278 times 18 is $5,004, plus the $150 fee, for a total of about $5,154. Compare that with $6,600 at $200 a month on the original card, and the transfer saves roughly $1,446, provided the balance is actually gone before the promotion ends. The catch is the part people skip: the fee is charged on the transferred amount whether or not you finish, the rate after the promotion commonly jumps back to a standard APR in the twenties, new purchases on the transfer card often accrue interest immediately, and a missed payment can end the promotion early. A transfer is a good tool only when the payoff payment is already budgeted, the promo end date is in your calendar, and the old card stays empty instead of refilling while you pay the new one.

What paying it off does to your credit, and what it does not do.

Paying a card down lowers your credit utilization, the share of your available credit you are using, and utilization is one of the largest factors in credit scoring, so a falling balance usually helps your score as it falls, even before the card hits zero. Paying on time every month protects the payment history that matters even more. What paying a card off does not do is erase the account's history: closing the card after payoff can raise your utilization by removing its credit limit from the calculation, and can shorten your average account age over time, so the usual advice is to pay the card to zero, keep it open, and use it rarely for a small purchase you pay off in full, rather than closing it in celebration. None of that changes the payoff math, but it changes the aftermath, and a debt-free month that also protects your credit score is worth planning for.

The mistakes that restart the clock.

The first mistake is paying less than the monthly interest, which grows the balance while feeling like a payment. The second is new spending on the card being paid off, which moves the finish line every month and turns a 33-month plan into an open-ended one; the card under attack should be frozen in practice, not just in intention. The third is choosing a payment that only works in a perfect month, with no room for a car repair or a medical bill, and then missing a month, which adds a late fee and possibly a penalty rate. The fourth is ignoring the other cards while one is attacked: minimums on every card, every month, without exception, because a missed minimum costs fees and credit damage that dwarf any interest saved by the focus strategy. The fifth is treating the payoff date as a finish line for budgeting: the payment that cleared the card should roll into savings or the next debt the month after, or lifestyle spending quietly absorbs it and the next emergency goes straight back onto a card.

How to use this calculator well.

Enter the balance from your latest statement, not the number you wish it were, and enter the APR printed on that statement, including any penalty rate that currently applies. Enter the monthly payment you can actually make in a bad month, not a good one, and read the months, the total paid, and the total interest together, because months alone hide cost and interest alone hides time. Then run the same balance at a payment $50 and $100 higher to see what the next step up buys you, and run it at the payment your target date requires, rounding up to a whole dollar amount you can sustain. List your other cards the same way, pick avalanche or snowball by the order you will finish, and write the plan down with dates. A payoff plan with a monthly dollar amount, a focus card, and a debt-free date is a plan. Everything else is a wish with a calculator attached.

With the pre-filled defaults — Current Balance $5,000, Annual Percentage Rate (APR) 19.99%, Monthly Payment $200 — the Credit Card Payoff Calculator returns Monthly Interest Rate 0.0167%, Months to Pay Off 33, Total Amount Paid $6,600.00, Total Interest Paid $1,600.00, Interest Saved by Doubling Payment $350.63. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.