Debt Payoff Calculator
Estimate a debt payoff timeline and total interest from the current balance, annual rate, and a steady monthly payment.
Estimated result
Enter your detailsResults are educational estimates and do not include every fee, tax, or contract term.
Free to use. No account required. Your entries stay in this browser.
Explore the result
Result visual
Scenario comparison
How this debt payoff calculator works
Formula used
Monthly interest is applied to the remaining balance, then the entered payment is subtracted until the balance reaches zero.
How to read the result
The result is a payoff scenario. A payment that does not cover the first month's interest cannot produce a payoff date without a rate or payment change.
What the estimate leaves out
Variable rates, new charges, fees, payment allocation rules, and different statement lengths can change the real timeline and interest paid.
Use the result as a starting point, then read how to estimate a realistic debt payoff timeline. For formula details and test limits, see the calculator methodology.
Compare payoff speed with total cost
An extra payment can change both the payoff date and total interest. The comparison is most useful when the rate remains fixed and new charges stop.
Clear the interest test
The payment must cover the interest added each month and reduce principal. If it does not, the balance will not follow a normal payoff path.
Measure the extra payment
Look at months and interest saved, not only the new payoff date. Then confirm the extra amount still leaves room for required bills and a basic cash buffer.
Direct payments correctly
Some providers apply extra money to a future bill instead of principal. Ask how to mark an additional principal payment and whether any penalty applies.
Use realistic inputs
Use the current principal balance, the rate that applies now, and a payment you can repeat. Exclude purchases that you plan to add later because they create a different scenario.
For the definitions and decisions behind these inputs, browse the debt payoff learning path.
Verify terms before acting
Verify compounding, statement timing, fees, variable-rate terms, payment allocation, and prepayment rules with the creditor before relying on the projected date.