Credit Card Payoff Calculator
See how many months it takes to clear your credit card debt and how much interest you will pay.
This calculator runs entirely in your browser. Nothing you type is uploaded or saved.
How to use this tool
This credit card payoff calculator turns three simple numbers into a clear payoff plan. First, enter your current balance, the amount you owe on the card today. Next, enter the card's APR, which you can find on your statement or in your online account. Finally, enter the fixed monthly payment you plan to make each month. Select "Calculate payoff" and the tool shows the number of months to reach a zero balance, the total interest you will pay, and a full month-by-month payoff timeline you can copy or download.
How the payoff math works
interest this month = remaining balance × monthly rate
principal this month = monthly payment − interest this month
new balance = remaining balance − principal this month
Credit card interest compounds, so the calculator does not use a single formula. Instead it iterates month by month, exactly the way your card issuer does. Each month it adds interest to the balance, subtracts your payment, and carries the new balance forward. It repeats this loop until the balance hits zero, counting the months along the way and adding up every dollar of interest. This is why the same balance can take very different amounts of time to clear depending on your payment size and the card's APR. One important check the tool makes: if your monthly payment is smaller than the first month's interest, the balance never goes down, so the debt would never be paid off. In that case the calculator warns you instead of running forever.
A real example
Say you owe $5,000 on a card at 19.99% APR and you pay a fixed $200 every month. The monthly rate is 19.99 / 100 / 12, about 0.016658. In month one the interest is roughly $83.29, so only about $116.71 of your $200 goes to the principal, leaving a balance near $4,883.29. Repeating this loop, the calculator finds it takes about 32 months to clear the card and you pay roughly $1,312 in total interest. If you raised the payment to $300 a month, the payoff drops to about 19 months and total interest falls to roughly $755. Seeing those two numbers side by side is often the nudge people need to pay a little extra.
Common questions
What is a credit card payoff calculator?
It is a tool that estimates how long it will take to clear a credit card balance and how much interest you will pay, based on your balance, APR, and a fixed monthly payment. This one builds a full monthly minimum balance payoff timeline so you can see the progress.
Why does my balance never reach zero in the result?
If your monthly payment is less than or equal to the first month's interest charge, the balance grows or stays flat instead of shrinking. The calculator detects this and asks you to enter a higher payment so the debt can actually be paid off.
Does this account for new purchases or fees?
No. To keep the payoff matrix clear, it assumes you stop adding charges and make the same fixed payment each month. New purchases, late fees, or annual fees would extend the timeline beyond what is shown here.
Is paying the minimum a good idea?
Minimum payments keep the account current but stretch the balance over many years and cost far more interest. Use the tool to compare a larger fixed payment and see how many months and how many interest dollars you save.
Is my information sent anywhere?
No. Everything is calculated in your browser using plain JavaScript. Nothing you enter is uploaded, stored, or shared.
This tool is for educational use only and provides estimates, not financial advice. Your actual payoff time and interest may differ based on your card's terms, billing cycle, and any new charges.