Credit Card Payoff Calculator

What this result means

The estimate answers a narrow question: if the balance, APR, and fixed monthly payment you entered stayed the same, and you made no new purchases, how long would this model take to reach $0, and how much interest would it add along the way?

Starting values on the form are examples you can change. They are not a recommendation and are not presented as current U.S. credit card averages. FinanceAvatar does not fetch or display a “current APR.”

This is not an issuer minimum-payment calculator. Card agreements often set a minimum due that can change with the balance. The CFPB notes that statements must show how long the current balance could take at the minimum due, and how much would be needed to pay it off in 36 months, assuming no new charges. This page does not reproduce that box.

How the payoff calculation works

The model uses a monthly interest rate of APR ÷ 12. Each month it adds interest to the remaining balance, then applies the scheduled payment plus any additional payment you entered. Amounts are tracked in cents. Monthly interest is the remaining balance in cents multiplied by the monthly rate, rounded to the nearest cent. The last payment is reduced to the remaining balance plus that month’s interest so the balance finishes at exactly $0 rather than going negative.

If the APR is 0%, no interest is added and each payment reduces principal only, aside from the same last-payment rounding.

APR versus this simplified monthly-rate model

The CFPB describes APR as the yearly rate typically used to state a card’s interest. This calculator converts that yearly rate to a monthly rate by dividing by 12 and applies it once per month to the remaining balance.

Many issuers instead use a daily periodic rate and an average daily balance. The CFPB explains that a daily periodic rate is often APR ÷ 360 or APR ÷ 365, and that interest may be calculated each day. Because this page does not model those daily methods, a statement can show a different interest charge even at the same APR.

When the modeled balance will not be paid off

If the combined monthly payment is less than or equal to the interest added in a month, the remaining balance does not fall. The calculator stops and reports that the modeled balance will not be paid off. It does not loop, invent a date, or treat a defensive iteration cap as your payoff period.

How additional payments affect the modeled payoff

Any additional monthly amount is added to the payment you entered and applied every month until the final, possibly smaller, payment. In this model, a larger combined payment usually means fewer months and less total interest, holding the balance and APR constant. The comparison columns add $25 or $75 to that combined payment. Those increments are illustrations, not recommended extras.

What the calculator does not include

• New purchases, cash advances, or balance transfers
• Annual fees, late fees, or other card fees
• Penalty APRs or promotional-rate expiration
• Grace periods or multiple APR buckets on one account
• Issuer-specific daily or average-daily-balance methods
• An issuer’s contractual minimum-payment formula

Assumptions and limitations

• The APR you enter does not change over the payoff.
• Payments are monthly and applied after that month’s interest.
• No new charges are added to the balance.
• Currency amounts are rounded to the nearest cent. The final payment is reduced so the remaining balance is $0.
• A 600-month cap exists only as a safety stop for the simulator. Hitting that cap is reported as “will not be paid off,” not as a 50-year payoff.