Why does the calculator say my debt will never be paid off?

Because your payment is smaller than the monthly interest charge. At 20.94% APR, a $6,000 balance accrues about $105 of interest a month, so anything under that makes the balance grow. The calculator is not broken — it is telling you the most important thing on the page.

Should I use the minimum payment in the calculator?

Try it once, to see the number, then never again. Minimums are calculated to keep an account current rather than to clear it, and the resulting timeline is usually shocking enough to be motivating.

Does the calculator account for new spending?

No, and neither does any other one. Every payoff projection assumes you stop adding to the balance. If you keep spending on the card, the real timeline is longer than any calculator will tell you.

What interest rate should I enter?

The purchase APR from your own statement, not an average. For reference, US commercial banks averaged 20.94% on credit card plans in May 2026, but individual rates vary widely.

Credit Card Payoff Calculator: How to Actually Use the Number It Gives You

Most payoff calculators answer a question nobody quite asked: “how long until this is over?” Useful, but the more actionable question is “what does one more $50 a month actually buy me?” — because that’s the decision in front of you, and the answer is usually larger than people expect.

The calculator below answers both.

Payoff calculator

Runs entirely in your browser. Nothing is sent anywhere, and nothing is stored.

BalanceInterest rate (APR %)Monthly payment

Assumes a fixed rate, a fixed payment, and no new spending on the balance. Real statements vary — treat the result as a planning estimate, not a quote.

Reading the answer properly

The default figures use 20.94% APR, which is what US commercial banks averaged on credit card plans in May 2026. Change it to the rate on your own statement — averages are for context, not for planning.

Three things the number is telling you that are easy to skim past.

The interest total is the real headline. Timeline is emotional; the interest figure is money. It’s what the debt costs you on top of what you actually bought.

The “+$50” line is the decision. Almost nobody can double their payment. Nearly everyone can find $50 somewhere for a while. That comparison usually shows a disproportionate effect, because extra payments hit the principal directly and reduce every future month’s interest charge.

“Never paid off” is information, not an error. If the payment is below the monthly interest charge, the balance grows no matter how long you keep paying. On a $6,000 balance at 20.94% the interest alone is about $105 a month. Any payment under that is treading water while going backwards.

What every calculator quietly assumes

That you stop using the card. Biggest assumption on the list, and the one people break without noticing. Every projection assumes zero new spending, and the most common reason a real payoff takes longer than the model is that the card kept getting used. If you can’t stop entirely, at least stop on the card you’re attacking.

That the rate stays fixed. Purchase APRs are usually variable. A promotional 0% period ending mid-plan changes everything, and the calculator has no idea it exists.

That every payment lands. One missed payment can trigger a penalty rate and a fee, both of which push the timeline out.

That the whole balance is at one rate. If you have a purchase balance and a cash-advance balance on the same card, they’re often at different rates, and payments may be allocated in ways you don’t control. For a rough plan, use the highest rate; for precision, treat them separately.

Using it to make a decision, not just a number

Run it three times and write down the results:

Minimum payment. The number you’re on track for today.
What you currently pay. The realistic baseline.
What you pay plus $50. The proposal.

Comparing those three is the point. The gap between the first and second shows what your existing effort is worth; the gap between the second and third shows what a small extra commitment buys. That comparison motivates far better than any total.

Two things the calculator can’t tell you

Which card to attack first. With several balances, the projection above works for one at a time. Whether to hit the highest rate or the smallest balance is a separate decision — avalanche vs snowball has the comparison, and the honest answer is that the method you’ll finish beats the method that’s optimal on paper.

What it does to your credit score. Falling balances mean falling utilisation, which is 30% of a FICO score and the fastest-moving part of it. That improvement often arrives well before the balance is cleared — how quickly utilisation moves a score covers the mechanics.

After the number

A projection is only a plan once something automatic backs it. Set the payment as a standing transfer on payday rather than a monthly intention, and recalculate every couple of months rather than every week — the number moves slowly, and watching it daily is how people lose heart.

If the minimums alone are already out of reach, the calculator will tell you so, and that’s a different problem needing different options, covered in what to do when it feels impossible. If they’re not, run the numbers above with your actual payment before you do anything else — the step-by-step payoff plan only works once you know what you’re aiming at.