Debt Payoff Calculator

A debt payoff calculator helps you determine how long it will take to pay off a debt and how much total interest you'll pay based on your current balance, interest rate, and monthly payment amount. It's an essential tool for creating a debt elimination strategy.

High-interest debt like credit cards can take years or even decades to pay off with minimum payments. This calculator shows the real timeline and cost of your debt, motivating you to increase payments and save thousands in interest. It also warns you if your payment is too low to cover the monthly interest, which would cause your debt to grow instead of shrink.

Use this calculator to evaluate different payment strategies, see how extra payments accelerate your payoff date, and understand the true cost of carrying debt. Whether it's credit card debt, a personal loan, or any other fixed-rate debt, knowing your payoff timeline is the first step toward financial freedom.

1. Enter your current balance — The total amount you currently owe.
2. Enter the annual interest rate — The yearly interest rate on your debt.
3. Enter your monthly payment — The fixed amount you plan to pay each month.
4. Review results — See how many months to pay off, total interest, and total paid.
5. Try different amounts — Increase the monthly payment to see how it shortens the timeline.

The number of months to pay off is calculated using:

n = -log(1 - (r x B) / P) / log(1 + r)

Where: n = number of months, r = monthly interest rate, B = current balance, P = monthly payment.

The payment must exceed the monthly interest charge (B x r) for the debt to be paid off. Otherwise, the balance grows.

Example: $15,000 at 18% APR with $500/month → 38 months, $3,862 total interest.