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

The three numbers that decide everything

Payoff time comes down to your current balance, the annual percentage rate (APR) on the card, and the fixed amount you pay each month. Enter those three and the calculator returns how many months remain and how much interest you will pay.

One assumption matters: this holds your APR and payment steady and assumes you stop adding charges. A fixed payment is different from a minimum payment, which shrinks as your balance falls and drags payoff out much longer. Promotional rates, fees, and changing minimums can shift the real number, so treat any result as a solid estimate.

Turning APR into a monthly rate

Interest is charged monthly, but APR is an annual figure, so you divide by 12 to get the monthly rate. A 22 percent APR becomes 0.22 / 12 = 0.018333 per month.

Each month that rate applies to whatever balance remains. Only the part of your payment left after covering that interest actually reduces what you owe.

Why it takes longer than balance divided by payment

Dividing balance by payment looks tempting: 5,000 dollars at 150 dollars a month is about 33 months. The real answer is longer because part of every payment goes to interest, not principal.

In month one of that example, interest is 0.018333 x 5,000, about 92 dollars. Out of a 150 dollar payment, only about 58 dollars reduces the balance. As the balance falls the monthly interest falls too, so more of each payment attacks principal, but the early drag is why payoff stretches from 33 months to about 52.

The payoff formula

To compute it directly:

Months to pay off = -log(1 - (r x Balance) / Payment) / log(1 + r)

This is standard loan amortization math, since a card paid at a fixed amount behaves like an amortizing loan.

• r = the monthly interest rate, which is APR divided by 12, written as a decimal
• Balance = the amount you currently owe
• Payment = the fixed amount you pay every month
• The result is the number of months; divide by 12 for years

Worked example: 5,000 dollars at 22 percent APR

Owe 5,000 dollars at 22 percent APR, paying a fixed 150 dollars a month.

The monthly rate is r = 0.22 / 12 = 0.018333. First-month interest is 0.018333 x 5,000, about 92 dollars. Since 150 dollars clears that and leaves about 58 dollars, the balance falls.

Plugging into the formula gives about 52 months, roughly 4.3 years. Over that time you pay about 2,800 dollars in interest on top of the original 5,000 dollars. That interest total is the real cost of taking years to clear the balance.

The rule that decides whether you ever finish

There is a hard threshold in the formula: your monthly payment must be greater than r x Balance, the first month's interest. If it is not, the payment fails to cover interest, the balance holds or grows, and it never reaches zero.

In the example, first-month interest is about 92 dollars, so 150 dollars works. Pay only 90 dollars and the balance creeps up every month. This is why minimum payments are dangerous: they are often set just barely above the interest, so almost nothing goes to principal.

The further your payment sits above that first-month interest figure, the faster you finish and the less interest you pay. Small increases above the minimum have an outsized effect because they hit principal directly.

Common mistakes

A few habits keep balances alive far longer than expected. These are estimates to plan around, not financial advice.

• Paying only the minimum. Minimums often sit just above the monthly interest, so the balance barely moves and payoff drags on for years.
• Adding new charges. New purchases raise the balance interest is calculated on and reset your progress. A payoff estimate only holds if you stop adding to the card.
• Ignoring the APR. Two people with the same balance and payment can have very different timelines purely because of their rate. A higher APR sends more of each payment to interest.
• Trusting balance divided by payment. It always understates the time and ignores interest cost entirely.

Same balance, five different payments

The fastest way to feel how much the payment matters is to hold the balance and rate still and change only the monthly amount. Take the same 5,000 dollar balance at 22 percent APR and run it through the calculator at five payment levels. At 150 dollars a month the card is gone in 52 months with about 2,798 dollars of interest. At 200 dollars it takes 34 months and costs about 1,750 dollars. At 250 dollars it is 26 months and about 1,286 dollars. At 300 dollars it is 21 months and about 1,022 dollars. At 500 dollars it is 12 months and about 574 dollars.

Notice where the biggest jump happens. Moving from 150 to 200 dollars, just 50 dollars more, removes 18 months and about 1,048 dollars of interest. Moving from 300 to 500 dollars, an extra 200, removes only 9 months and about 447 dollars. The returns shrink as the payment grows, because the first extra dollars rescue you from the slowest, most interest-heavy stretch of the schedule. If your budget is tight, the first increase over your current payment is usually the most valuable one.

How a shrinking minimum payment stretches the timeline

Many issuers set the required minimum as the month's interest plus a small percentage of the balance, with a flat floor such as 25 dollars. Exact formulas differ by issuer and card agreement, so treat this as an illustration rather than a rule. Using interest plus 1 percent of the balance on the same 5,000 dollar, 22 percent card, the first minimum is about 142 dollars, close to the 150 dollar fixed payment from the guide's main example.

The difference is what happens next. A fixed 150 dollar payment ends in 52 months. The shrinking minimum drops every month as the balance falls, and by the time you owe 1,000 dollars it has fallen to roughly 28 dollars. Run all the way out, that pattern takes about 227 months, close to 19 years, and costs roughly 7,960 dollars in interest on a 5,000 dollar purchase.

Two cards can look identical on a statement and still behave very differently depending on how the minimum is built. If you cannot raise your payment, at least note the first month's minimum and keep paying that dollar amount every month instead of letting it drift downward. That single habit converts a minimum-payment schedule into a fixed-payment one.

Balance transfer math: fee versus savings

A balance transfer card with a low or zero introductory rate can cut interest sharply, but the transfer usually carries a one-time fee, commonly a few percent of the amount moved. Consider a hypothetical offer with a 3 percent fee and 0 percent for 15 months, with the old 22 percent rate returning on any leftover balance afterward. Moving 5,000 dollars adds a 150 dollar fee, so you start at 5,150 dollars.

Paying 200 dollars a month, you wipe out 3,000 dollars during the promotional window, then carry the remaining 2,150 dollars at 22 percent for about 13 more months. The all-in cost, fee plus interest, comes to roughly 417 dollars over 28 months. Staying on the original card at 200 dollars a month costs about 1,750 dollars over 34 months. The hypothetical transfer saves roughly 1,330 dollars.

The same math can turn against you. A 5 percent fee with only 12 promotional months at that 200 dollar payment costs about 734 dollars in total, still better than staying put but far less dramatic. Real offers vary by issuer and by your credit profile, and a missed payment can end a promotional rate early, so read the terms and run your actual fee, promo length, and payment through the calculator by comparing the total cost, not just the headline rate.

Several cards at once: snowball versus avalanche

With more than one card, the question becomes where the extra money goes. Two popular orders exist. The snowball method sends all extra cash to the smallest balance first, then rolls that freed-up payment onto the next smallest. The avalanche method targets the highest APR first. In every case you keep paying at least the minimum on all the other cards.

Here is a worked comparison. Card A owes 1,500 dollars at 15 percent with a 40 dollar minimum, Card B owes 3,000 dollars at 26 percent with a 75 dollar minimum, and Card C owes 500 dollars at 19 percent with a 25 dollar minimum. The total budget is 400 dollars a month. Under the snowball order, Card C is gone in month 2, Card A in month 7, and Card B in month 15, with about 808 dollars of total interest. Under the avalanche order, Card B and Card C are both finished in month 11 and Card A in month 15, with about 667 dollars of interest.

Both finish in the same 15 months here, and avalanche saves about 141 dollars. The snowball path gives you a quick win in month 2, which some people find keeps them going. Mathematically, avalanche is never more expensive, and the gap widens when rates differ widely or balances are large. If the early win would keep you paying, the extra cost may be worth it; if rates are similar, the choice barely matters.

Windfalls, rate changes, and what the model leaves out

A lump sum has outsized power early in a payoff. On the 150 dollar, 22 percent example, putting 1,000 dollars from a tax refund or bonus onto the card after the sixth payment shortens the schedule from 52 months to 39 and cuts interest from about 2,798 dollars to about 1,748 dollars. That is roughly 1,050 dollars saved for a one-time 1,000 dollar payment, because the money stops accruing 22 percent immediately.

The calculator's monthly model is a good planning tool, but real cards work a little differently. Issuers typically apply a daily periodic rate to your average daily balance, so the exact interest each month depends on when your payment posts and when purchases land. A variable APR can also move with a benchmark rate, which changes the schedule midway. Fees, a lost promotional rate, or a late payment can add cost the model does not see.

A quick sanity check keeps you honest about the result. Total paid should be close to your payment times the number of months, since only the last payment is smaller: 150 times 52 is 7,800, against a calculator total of 7,798. And the months must always exceed balance divided by payment, which is 33.3 in the example. If your answer breaks either test, a number was entered wrong.