Payment Calculator

See how long it takes to clear a credit card balance with a fixed monthly payment, and how much interest you pay along the way. If the payment would not cover the monthly interest, the calculation tells you straight away.

How it works: Each month, interest is charged on the remaining balance and your payment is taken off. This calculator follows that month by month until the balance reaches zero — assuming no new spending on the card.

How the Payment Calculator Works

This Payment Calculator answers the credit card question that matters most: if you pay a fixed amount every month, when will this balance actually be gone — and how much interest will you hand over on the way? Enter your card balance, the card’s APR, and the monthly payment you can commit to, and it shows your payoff time, the total interest, and the total paid overall. It is the fastest way to test a payoff plan.

There is no tidy one-line formula for a payoff date, so the calculator does what your card issuer does: it steps through the balance month by month. Each month it charges interest on the current balance — Interest = Balance × (APR ÷ 100 ÷ 12) — adds that interest to what you owe, then subtracts your payment. It repeats until the balance reaches zero, counting the months and totalling the interest charged. The final payment is smaller than the rest, because it only has to clear what is left. The result sums the plan up as “Debt-free in” so many months (also shown in years and months), with your starting balance, total interest paid, and total paid overall.

One safeguard is built in. The first month’s interest is charged on the full balance, so if your payment is less than or equal to that amount, the balance would never come down at all. Rather than invent a date, the calculator tells you straight away and shows you the interest figure your payment has to beat. The projection assumes your APR stays the same and that you make no new purchases on the card — keep spending on it, and the real payoff takes longer.

How to Use This Calculator

Enter your current balance in the Card balance field.
Enter the card’s APR (% per year) — you will find it on your statement or in your card app.
Enter the fixed Monthly payment you can afford to make every month.
Press Calculate.
Read the debt-free time and totals — then enter a higher payment and run again to see how much time and interest you save.

Example

With a $5,000 balance at 18% APR and a payment of $200 a month — the figures pre-filled in the form — the first month’s interest is $75.00, so $125 of that first payment actually reduces the balance. Month by month the interest portion shrinks, more of each payment attacks the debt, and the balance clears in 32 months: 2 years and 8 months. Total interest is $1,313.96, so clearing a $5,000 debt costs $6,313.96 in all.

Now raise the payment to $300 a month, with the same balance and APR. The debt is gone in 20 months — 1 year and 8 months — and the total interest falls to $797.17, for a total paid of $5,797.17. That extra $100 a month saves $516.79 in interest and finishes a full year sooner — why fixed payments well above the minimum work so well.

What Affects the Result

Monthly payment — the strongest factor, and the one you control. Every extra dollar reduces the balance that next month’s interest is charged on.
APR — a higher rate sends more of each early payment to interest and stretches the payoff out.
Starting balance — a bigger balance means more months of interest, even at the same payment and rate.
New spending — the estimate assumes the card stays unused while you pay it down. New purchases add to the balance and push the payoff date back.
Practical tip — pick a payment you can sustain in a bad month too. A smaller payment you never miss beats an ambitious one that collapses after two months.

A card’s minimum payment is usually a small percentage of the balance, so it shrinks as the balance falls — a design that keeps debt alive for years. Choosing your own fixed amount is what turns a drifting balance into a plan with a finish line. With several cards, run each one through here, aim spare money at the highest-APR balance first, and roll each cleared card’s payment into the next.

Payment Calculator FAQs

What happens if my payment is too small?

If the payment does not exceed the first month’s interest, the balance never falls. At 18% APR on $5,000, that interest is $75.00, so a payment of $75 or less goes nowhere — the calculator flags this instead of showing a date.

Why is the last payment smaller than the others?

Because the simulation clears exactly what is left. In the final month, the remaining balance plus its interest is usually less than your full payment, so you only pay what is needed to reach zero.

Is paying the minimum really that bad?

Usually, yes. Because the minimum is typically a percentage of the balance, it falls as you pay, stretching a modest balance over many years. A fixed payment, like the ones in the examples, clears the same debt far faster.

Can I use this for debts other than credit cards?

Yes, for any fixed-rate balance repaid with a fixed monthly payment — a store card or personal loan, for instance. For a fixed-term loan where you need the payment worked out for you, the Loan Calculator is the better fit.

What if my APR changes halfway through?

The estimate applies the single APR you enter to the whole period. If your rate rises, the payoff takes longer; if it falls, it is quicker. Re-run the numbers whenever your rate changes, and treat results as estimates, not personal financial advice.