Why does Total Amount Paid look higher than balance plus interest?

Because the tool multiplies your monthly payment by the number of months, and the final month is usually a partial payment rather than a full one. In the $250 example the final month only needs about $229, so the $8,000 shown is a few dollars above the true total. Trust the total interest figure, which is summed month by month.

What happens if I keep using the card?

The projection breaks. The model assumes no new purchases at all, so every additional charge extends the timeline and increases the interest beyond what is shown. Paying down a card you are still spending on is the most common reason a plan takes far longer than the calculator predicted.

Does it model the declining minimum payment?

No. Real card minimums fall as the balance falls, which is what makes minimum-only repayment take so long. This tool holds your payment fixed, so it shows what happens if you keep paying the same amount throughout, which is the better strategy anyway.

Why will it not calculate for my payment?

If the payment is equal to or less than one month of interest, the balance can never fall and the tool refuses to produce a schedule. The warning shows the exact monthly interest so you know the minimum your payment has to beat.

Are annual fees and late fees included?

No. The simulation charges interest only. Annual fees, late payment charges and over-limit fees all add to what you actually pay, so treat the result as the best case for the numbers you entered.

How is the monthly interest worked out?

The APR is divided by twelve and applied to the outstanding balance each month. Real issuers often use a daily periodic rate applied to the average daily balance, which produces a very similar but not identical figure.

Credit Card Payoff Calculator: Time and Interest Cost

Credit Card Payoff Calculator: Time and Interest CostThe Credit Card Payoff Calculator is a free browser-based tool that works out how long a credit card balance takes to clear at a fixed monthly payment and how much interest you pay getting there. Enter the balance, the APR and what you can pay each month, and it simulates the balance forward one month at a time, charging interest and applying the remainder to principal, until the balance reaches zero. It warns you when your payment is smaller than the monthly interest, because in that case the balance never falls at all. It assumes no new purchases and no fees.

What people use it for

Seeing what an extra $150 a month is actually worth

A $6,000 balance at 22% takes 32 months at $250 a month, costing about $1,979 in interest. Raising the payment to $400 clears it in 18 months for about $1,081. The extra $150 buys back fourteen months and roughly $898, which is a far more persuasive argument than a general resolution to pay more.

Checking whether a balance transfer is worth the fee

Before paying a transfer fee, run the current card at its real APR to establish the interest cost. Compare that against the fee plus whatever interest applies after the promotional period ends. The tool does not model promotional rates, so you do the comparison across two separate runs.

Understanding why the balance barely moves

Someone paying close to the minimum enters their real numbers and hits the warning that the payment does not exceed the monthly interest. That warning names the exact interest figure, which explains a year of payments that seemed to achieve nothing better than any general advice could.

Setting a realistic debt-free date

Converting a balance into a specific number of months makes the goal concrete. Knowing the card clears in November rather than someday is what keeps a payment plan intact through the months where it feels pointless.

How it works

Enter your current balance Use the statement balance you actually owe today, not your credit limit. If you have several cards, run each separately or use the debt payoff calculator instead.
Enter the APR Take the purchase APR from your statement. Cash advances and balance transfers usually carry different rates, so the result applies to the portion of the balance at the rate you entered.
Enter your monthly payment Put in what you will genuinely pay every month. If it is below the monthly interest the tool shows a red warning naming that interest amount, and the Calculate button stays disabled.
Press Calculate Payoff Time to pay off is shown in years and months with the total month count beneath it, alongside total interest paid and total amount paid.
Try a higher payment Increase the monthly payment and recalculate. Interest on credit cards compounds monthly, so even modest increases cut the timeline sharply rather than proportionally.

Worked examples

Input: Balance $6,000, APR 22%, monthly payment $250.

Result: Cleared in 32 months, shown as 2 yr 8 mo, with about $1,979 in total interest. Interest is roughly a third of what you originally borrowed.

Input: Balance $6,000, APR 22%, monthly payment $400.

Result: Cleared in 18 months, shown as 1 yr 6 mo, with about $1,081 in total interest. The larger payment saves about $898 and more than a year.

Frequently asked questions

Why does Total Amount Paid look higher than balance plus interest?: Because the tool multiplies your monthly payment by the number of months, and the final month is usually a partial payment rather than a full one. In the $250 example the final month only needs about $229, so the $8,000 shown is a few dollars above the true total. Trust the total interest figure, which is summed month by month.
What happens if I keep using the card?: The projection breaks. The model assumes no new purchases at all, so every additional charge extends the timeline and increases the interest beyond what is shown. Paying down a card you are still spending on is the most common reason a plan takes far longer than the calculator predicted.
Does it model the declining minimum payment?: No. Real card minimums fall as the balance falls, which is what makes minimum-only repayment take so long. This tool holds your payment fixed, so it shows what happens if you keep paying the same amount throughout, which is the better strategy anyway.
Why will it not calculate for my payment?: If the payment is equal to or less than one month of interest, the balance can never fall and the tool refuses to produce a schedule. The warning shows the exact monthly interest so you know the minimum your payment has to beat.
Are annual fees and late fees included?: No. The simulation charges interest only. Annual fees, late payment charges and over-limit fees all add to what you actually pay, so treat the result as the best case for the numbers you entered.
How is the monthly interest worked out?: The APR is divided by twelve and applied to the outstanding balance each month. Real issuers often use a daily periodic rate applied to the average daily balance, which produces a very similar but not identical figure.

Tips

Pay a fixed amount rather than the minimum. Minimums shrink as the balance falls, which stretches repayment out for years even when nothing new is charged.
Stop using the card while paying it down. New purchases undo the plan quietly, and the calculator has no way to account for them.
Run the calculation at three payment levels and pick the highest one you can sustain. Consistency matters more than an ambitious payment you abandon in month three.
If you carry several cards, use the debt payoff calculator instead so the extra payment goes to the highest rate rather than being split evenly.

Written by Ahsan Mahmood. Last updated 2026-07-21. This calculator runs entirely in your browser and produces estimates, not tax advice.TaxEase — Credit Card Payoff Calculator: Time and Interest Cost