Debt Payoff Calculator
Last updated: July 2026
Estimate how long it will take to pay off a debt and how much interest you can save with extra payments.
Payoff time with extra payment
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- New monthly payment: $0.00
- Interest with extra: $0.00
- Months saved: —
- Interest saved: $0.00
On this page
Quick summary: Estimate how long it will take to pay off a debt and how much interest you can save with extra payments. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator does
The Debt Payoff Calculator estimates how long it may take to repay a balance and how much interest may be paid under a chosen payment amount.
How to use the calculator step by step
Enter the current balance, interest rate, and planned payment. Test a higher payment to see how additional principal reduction changes payoff time and total interest.
How the calculation works
Each payment first covers accrued interest, with the remaining amount reducing principal. As the balance falls, future interest charges usually fall as well.
Worked example and scenario testing
A 5,000 balance at a high annual rate can take years to repay if payments are only slightly above the interest charged. Increasing the payment can shorten the schedule dramatically.
How to interpret your result
A shorter payoff period generally means less total interest, provided there are no penalties or fees for paying early.
Accuracy, assumptions, and limitations
Variable rates, new charges, late fees, promotional periods, minimum-payment formulas, and account fees can change the actual payoff path.
Common mistakes to avoid
Do not continue adding new charges while using a payoff estimate that assumes the balance only decreases. Also check whether the planned payment is high enough to reduce principal.
Privacy and browser-based calculations
Only debt balance, rate, and payment figures are required. Do not enter card numbers or account credentials.