General Finance
Credit Card Payoff Calculator
Work out how long a card balance takes to clear at a fixed payment, or what you must pay each month to be debt-free by a chosen date.
Calculation inputs
Choose a mode, then fill in either the monthly payment or the target number of months.
Results
No result yet
Complete the fields and select Calculate to show results here.
Estimates only, for general information. Your card issuer's statement is the final word.
About this calculator
This tool shows how long a credit card balance will take to disappear at a steady monthly payment, or the payment you would need to clear it within a set number of months. It suits anyone trying to plan a realistic route out of revolving debt.
How the calculation works
- Monthly rate r = APR ÷ 12
- Each month: interest = balance × r, then the payment is subtracted
- Required payment for n months: P = B × r ÷ (1 − (1 + r)^−n)
Notes and assumptions
Assumes no new purchases, fees or rate changes while the balance is being paid down.
How it works in plain English
Card interest is quoted as an annual percentage rate, but it is charged monthly. The tool divides the APR by twelve to get a monthly rate, then walks through the balance one month at a time. Each month, interest is added to whatever is still owed, and your payment is subtracted. The count stops the month the balance reaches zero, and every bit of interest along the way is added up.
In the target-timeframe mode the question is reversed. You choose how many months you want the debt to last, and the tool uses the standard loan payment formula to find the single fixed payment that brings the balance to zero exactly on schedule. That payment is then run through the same month-by-month walk so the total interest figure is accurate.
If a payment is smaller than the first month's interest, the balance can never shrink, so the tool tells you so instead of showing a misleading answer. The model assumes you stop using the card, the rate stays put, and no late or annual fees are added. Real statements may differ slightly because issuers often calculate interest on an average daily balance rather than a single monthly figure.
The formula
- Monthly rate r = APR ÷ 12
- Next balance = balance × (1 + r) − payment
- Payment for n months: P = B × r ÷ (1 − (1 + r)^−n)
Worked example
Picture a balance of $5,000 on a card charging 22.9% APR. The monthly rate is 22.9 ÷ 12, or about 1.91%, so the first month adds roughly $95.42 of interest.
Paying a fixed $200 each month, only about $105 of the first payment actually reduces the debt. As the balance falls, less goes to interest and more to principal, and the card is cleared in 35 months with about $1,860 in total interest.
Now switch to target mode and ask for a 24-month payoff. The formula gives a required payment of about $262 a month. Total interest drops to roughly $1,280 because the money is borrowed for eleven fewer months. Comparing the two runs shows clearly how an extra $62 a month changes both the timeline and the overall cost.
Frequently asked questions
Why does so little of my early payment reduce the balance?
Interest is figured on whatever you still owe, so it is largest at the start. With a high APR, a big slice of each early payment simply covers that month's interest. As the balance shrinks the interest charge falls too, and a growing share of the same payment goes toward the debt itself.
What happens if my payment is too small?
When a payment is less than or equal to one month of interest, the balance never goes down and may even grow if fees are added. The calculator flags this situation instead of giving a payoff date, and shows the first month's interest so you can see the minimum needed to make progress.
Does this match the minimum payment on my statement?
Not exactly. Issuers usually set the minimum as a small percentage of the balance plus interest, so it shrinks as you pay down the debt and stretches repayment out for years. This tool assumes one constant payment, which is a common and faster way to plan getting out of debt.
Will my real interest total match this estimate?
It should be close but not identical. Many issuers apply interest daily on an average balance, months have different lengths, and any new purchases or fees change the picture. Treat the result as a planning estimate rather than a figure that will match a statement to the cent.
Is a lower rate or a higher payment more helpful?
Both cut total cost, but raising the payment usually has the bigger and more immediate effect because it shortens the time interest has to build. A lower rate from a balance transfer helps most when it comes with a payment that is high enough to clear the debt before any promotional period ends.
Helpful next steps
- Debt Payoff Calculator (Snowball vs. Avalanche) — Compare paying off several debts at once.
- Emergency Fund Calculator — Size a cash cushion so new card balances are less likely.
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