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Debt Payoff Calculator

Estimate how long it may take to pay off debt and how much interest you could pay based on your balance, rate and monthly payment.

Your Details

Overview

A debt payoff calculator helps you estimate how long it may take to clear a balance using your current debt amount, annual interest rate and planned monthly payment. You can also add an extra monthly payment to see how paying more could reduce your payoff time and total interest.

How it works

The calculator converts the annual interest rate into a monthly rate and compares it with your total monthly payment. It then estimates how many months it would take for repeated monthly payments to reduce the balance to zero. Total repayment is estimated from the payment amount and payoff period, and total interest is the amount paid above the original balance.

How to use this calculator

  1. 1Enter your current debt balance.
  2. 2Add the annual interest rate charged on the debt.
  3. 3Enter your regular monthly payment.
  4. 4Include any extra monthly payment if you plan to pay more.
  5. 5Review the estimated payoff time, total paid and total interest.

Example Calculation

Current debt balance

$10,000

Annual interest rate

18%

Monthly payment

$300

Extra monthly payment

$50

Time to pay off debt

38 months

For a debt balance of 10000 at 18% interest with total monthly payments of 350, the debt would be paid off in about 39 months, with total repayment of roughly 13489 and interest of about 3489.

Frequently asked questions

What does this debt payoff calculator estimate?

It estimates how long it may take to pay off a debt, how much you may pay in total and how much of that total could be interest.

What happens if I add an extra monthly payment?

An extra monthly payment usually shortens the payoff period and reduces the total interest paid, because the balance falls faster.

Can this calculator be used for credit cards or personal loans?

Yes. It can be used for many types of debt as long as you know the balance, interest rate and monthly payment amount.

Why does the calculator show that my payment may not cover interest?

If your monthly payment is less than or close to the monthly interest charge, the balance may fall very slowly or may not fall at all.

Does this include fees or changing interest rates?

No. This version assumes a fixed rate and fixed monthly payments, so it does not account for changing rates, fees or missed payments.

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Assumptions and warnings

Assumptions

  • This calculator assumes a fixed interest rate and the same payment amount each month.
  • Results are estimates and do not include late fees, annual fees, balance transfers or penalty charges.
  • Extra monthly payments are assumed to be made consistently every month.
  • Interest is estimated using a standard monthly compounding approach.

Warnings

  • This calculator provides an estimate only and is not financial advice.
  • If your monthly payment does not cover interest, your balance may not go down as expected.
  • Speak to a qualified professional before making major financial decisions.