Debt Payoff Calculator
When a balance reaches zero at your planned payment, and how much interest it costs.
Minimum payments on a credit card can stretch a balance over decades. This calculator shows the month your debt is gone at the payment you plan to make, and the interest bill that comes with it.
It also warns you when the payment does not cover the interest added each month, which is the situation where a balance never falls no matter how long you pay.
At a glance
- What you enter
- Current balance, Annual interest rate, Planned monthly payment
- What you get
- Months until the balance is zero, Total interest, Share of your payments that is interest
- Formula shown
- Yes - every step, right below your results.
- Cost and privacy
- Free, no account needed, and nothing you type is stored.
See worked examples ↓ Read the FAQ ↓ Share this calculator ↓
Results are estimates for general information only - always verify with a professional or official source before acting on them.
How to use the Debt Payoff Calculator
- 1 Enter Current balance
- 2 Enter Annual interest rate
- 3 Enter Planned monthly payment - It has to be more than the monthly interest or the balance never falls.
- 4 Press Calculate. You get Months until the balance is zero, Total interest, Share of your payments that is interest, and every intermediate step stays visible under “How is this calculated?”
- 5 Change one number at a time to see what moves the result - that is usually the most useful thing a calculator can tell you.
Worked examples
Real numbers run through this calculator. Open any example to load it into the form above and change it.
A $5,000 card balance at 19.99% with $250 a month
A payment well above the minimum on a high-rate card.
You enter
- Current balance
- $5,000.00
- Annual interest rate
- 19.99%
- Planned monthly payment
- $250.00
You get
- Months until the balance is zero
- 25
- Total interest
- $1,131.78
- Share of your payments that is interest
- 18.5%
The balance clears in about 24.5 months at this payment, so the 25th payment finishes it, and the interest added in the first month is $83. Total interest is roughly $1,132, which is about 18% of the $6,132 you hand over. Paying $100 less a month would push the payoff past three years.
A $12,000 car loan at 6.5% with $300 a month
A larger balance at a lower rate and a smaller payment.
You enter
- Current balance
- $12,000.00
- Annual interest rate
- 6.50%
- Planned monthly payment
- $300.00
You get
- Months until the balance is zero
- 45
- Total interest
- $1,561.35
- Share of your payments that is interest
- 11.5%
The balance clears in about 45.2 months, and the first month adds $65 of interest. Total interest is roughly $1,561, or about 12% of the $13,561 paid in total. Despite being more than double the first example, this debt costs less in interest because the rate is a third of the card rate.
Guides that go with it
How Long Will It Take to Pay Off Your Debt? Calculate It Now
You can get a real answer to this in about ten minutes, and you do not need a spreadsheet wizard or a finance degree to do it. By the end of this guide you will know how to turn a pile of balances and…
How Much Can You Save by Paying Off Debt Early?
Paying extra toward a loan feels good. But how much does it actually save? In about ten minutes, you can work out the real number for your own debt: how many months you would cut, how much interest yo…
How Much Money Should You Budget Per Day While Traveling?
You can read this in about ten minutes, and by the end you will have a daily travel number you actually trust: one built from your destination, your style, and your fixed costs, not from a generic blo…
Frequently asked questions
Why does a fixed payment take so long to clear a credit card?
Interest is charged on the whole balance every month, and at a high rate it swallows most of a small payment. Paying $250 a month against $5,000 at 19.99% means about $83 of the first payment is interest, so only around $167 reduces what you owe. As the balance falls the interest falls with it, which is why the last year of a payoff goes much faster than the first.
That also explains why the monthly figure matters more than the rate on a small balance: adding to the payment attacks the balance directly and shortens every remaining month.
What happens if my payment is less than the monthly interest?
Then the balance never falls, no matter how long you pay. The calculator reports this instead of giving a false date: it shows a deliberately large number of months and the interest added in the first month, which will be higher than the payment you entered.
The fix is arithmetic, not patience. Either raise the payment above the monthly interest, or move the balance to a cheaper rate and keep paying the same amount. If you cannot do either, a free debt advice service is the right next step rather than a longer repayment schedule.
Why does the share of my payment that is interest fall over time?
Because interest is a percentage of what you still owe. In the first month it is a slice of the full balance; in the final month it is a slice of almost nothing, so nearly the whole payment goes to clearing the last of the debt. The share shown is the average across the whole payoff, so it sits between those two extremes.
You can use that share as a quick comparison between two plans. If one payment schedule is 17% interest and another is 33%, the second one is costing you roughly twice as much for the same borrowed money.
How do I see what an extra payment would save?
Run the same balance and rate twice, once with your current payment and once with the payment you think you could manage. The difference in total interest is real money you keep, and the difference in months is time you get back. On a high-rate balance, a modest increase often removes several months.
Once the balance is clearing, the same payment can be redirected to a savings goal or into an emergency fund so the next surprise does not refill the card.
Terms used here
Short, plain-language definitions of the words this calculator uses.