About the Debt Payoff Calculator
This calculator shows the two things that matter most when clearing a debt: how many months it takes and how much interest you'll pay along the way. Adding even a small extra amount each month can shorten the timeline and cut interest noticeably.
How it’s calculated
Each month interest accrues on the balance (APR ÷ 12), your payment covers that interest first, and the rest reduces the principal. The months are found by simulating this until the balance reaches zero.
Example calculation
An $8,000 balance at 19.99% APR with a $300 monthly payment is paid off in about 32 months, with roughly $1,600 in interest.
Frequently asked questions
What if my payment is too low?
If your monthly payment is smaller than the interest that accrues, the balance never falls. You need to pay more than the monthly interest to make progress.
How much does an extra payment help?
Extra payments go entirely to principal, so they cut both the payoff time and total interest — often by more than you'd expect.
This calculator provides estimates for educational purposes and should not be considered financial, tax, or legal advice. Your actual figures may vary with lender terms, fees, and market conditions.