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Credit Card Payoff Calculator

Months to clear a card balance and the interest it costs.

Reviewed by the Calculation Machine team · Updated 24 October 2026 · How we check our maths

Your values

ⓘ Live results

Results
Time to pay off
2 yr 6 mo
Total interest
$2,500.00
Total paid
$9,000.00
First month's interest
$135.36

Quick answer

With a fixed monthly payment, the months needed to clear a credit card are −log(1 − r × B ÷ P) ÷ log(1 + r), where B is the balance, P the payment and r the APR ÷ 12. A $6,500 balance at 24.99% APR takes 30 months to clear at $300 a month, but about 9 years 5 months at $150 a month, when interest ends up exceeding the original balance.

What the Credit Card Payoff calculator does

This calculator shows how long it takes to pay off a credit card if you stop using it and pay the same amount every month. Enter the balance, the card's APR and your monthly payment; it returns the payoff time, the total paid, the interest cost and how much of your first payment goes to interest.

Use it to pick a payment that clears the card by a target date, to see the cost of paying only a little above the minimum, or to judge whether a balance transfer is worth it. The payment must be more than the first month's interest, otherwise the balance never falls.

It assumes no new purchases, no fees and a constant APR. If you have several cards, list them in the debt avalanche calculator or debt snowball calculator to plan the order you pay them off.

The formula

n = −log(1 − r × B ÷ P) ÷ log(1 + r), r = APR ÷ 12

Formula variables
SymbolMeaningUnit
nNumber of monthly payments, rounded up to a whole monthmonths
BCurrent card balance$
PFixed monthly payment$
rMonthly periodic rate: APR ÷ 12, as a decimal—

This is the standard loan amortization formula solved for the number of payments. Card issuers actually charge interest on the average daily balance at APR ÷ 365, so real statements differ by small amounts each month.

Total paid is calculated as payment × months, which treats the final payment as a full one. Because the last payment is usually smaller, the interest figure can be overstated by up to one monthly payment; the payoff time is unaffected. A 0% promotional APR cannot be entered directly, so for a 0% balance simply divide the balance by the months of the promotion.

Worked examples

Paying a steady $300 a month

A $6,500 balance at 24.99% APR, paid at $300 a month with no new spending.

Inputs

  • Card balance6500 $
  • APR24.99 %
  • Monthly payment300 $

Result

  • Time to pay off2 yr 6 mo
  • Total interest$2,500.00
  • Total paid$9,000.00
  • First month's interest$135.36

The card is clear in 2 years 6 months. In the first month $135.36 of the $300 goes to interest, so less than 55% of that payment reduces the balance.

Paying just above the interest

The same $6,500 at 24.99%, but paying $150 a month, close to a typical minimum payment.

Inputs

  • Card balance6500 $
  • APR24.99 %
  • Monthly payment150 $

Result

  • Time to pay off9 yr 5 mo
  • Total interest$10,450.00
  • Total paid$16,950.00
  • First month's interest$135.36

Payoff stretches to 9 years 5 months and interest costs more than the original balance. Halving the payment more than triples the time in debt.

Aggressive payoff

$6,500 at 24.99%, paying $500 a month.

Inputs

  • Card balance6500 $
  • APR24.99 %
  • Monthly payment500 $

Result

  • Time to pay off1 yr 4 mo
  • Total interest$1,500.00
  • Total paid$8,000.00
  • First month's interest$135.36

The debt is gone in 16 months. Each extra dollar of monthly payment saves interest at the card's full 24.99% rate, a guaranteed return few investments match.

How payment size changes payoff time

Small increases in the monthly payment cut the payoff time sharply when the payment is close to the interest charge. Figures below are for a $6,500 balance at 24.99% APR, where the first month's interest is $135.36.

$6,500 at 24.99% APR
Monthly paymentMonths to pay offApprox. interest paid
$150113About $10,400
$30030About $2,200
$50016About $1,200

Is a balance transfer worth it?

A balance transfer card moves your debt to a new card with a 0% or low introductory APR, usually for 12 to 21 months, in exchange for a one-off transfer fee, commonly 3% to 5% of the amount moved.

To check one: add the fee to the balance and divide by the promotional months to get the payment that clears it before the rate jumps. Moving $6,500 with a 3% fee gives $6,695; over 18 months that is about $372 a month, with no interest at all. Compare that with paying the same $372 a month at 24.99% in this calculator. Transfers make sense when you can clear most of the balance within the promotion and will not add new spending to either card.

Why minimum payments take so long

Minimum payments are usually set as a small percentage of the balance plus that month's interest, with a fixed dollar floor. As the balance falls, the minimum falls too, so the debt shrinks more slowly every month. Under the US Credit CARD Act, your statement must show how long paying only the minimum would take and the monthly payment needed to clear the balance in three years. Picking a fixed payment, as this calculator assumes, and keeping it level as the balance falls is one of the simplest ways to cut both time and interest.

How to use the Credit Card Payoff Calculator

  1. 1Enter the current balance from your latest statement or app.
  2. 2Enter the purchase APR, or the APR that applies to the balance you are paying off.
  3. 3Enter the fixed amount you will pay each month; it must be more than the first month's interest.
  4. 4Read the payoff time and interest, then try a higher payment to see how much time it saves.

Frequently asked questions

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

It depends on the balance, APR and payment. At 24.99% APR, a $6,500 balance takes 30 months at $300 a month and 16 months at $500 a month.

How is credit card interest calculated each month?

Most issuers apply a daily rate (APR ÷ 365) to your average daily balance, then add it up over the billing cycle. A quick estimate is balance × APR ÷ 12: $6,500 × 24.99% ÷ 12 is about $135.

Is it better to pay off a credit card in full or carry a balance?

Pay in full whenever you can. Carrying a balance does not improve your credit score and costs interest at the card's APR, while paying in full during the grace period usually costs nothing.

Should I pay off my credit card or save money?

Keep a small emergency fund first, then put spare cash toward high-APR cards. Paying down a 25% card is equivalent to a guaranteed 25% return.

Will paying off my credit card raise my credit score?

Often, yes. Lower balances reduce your credit utilization ratio, one of the biggest factors in common credit scores, and many people see an improvement once the lower balance is reported.

References

  • Credit Card Accountability Responsibility and Disclosure (CARD) Act of 2009 — US Congress / Consumer Financial Protection Bureau
  • What is a balance transfer? — Consumer Financial Protection Bureau

About this calculator