Total Interest Paid Calculator

Use this free total interest paid calculator to calculate the total interest you will pay on a loan.

How the total interest paid calculator works

Total interest = monthly payment × number of payments − principal, where payment = P × r ÷ (1 − (1 + r)⁻ⁿ).

Frequently asked questions

How can I pay less interest?

Choose a shorter term, a lower rate, or make extra principal payments.

Results are estimates for general information only. They are not a substitute for professional advice where applicable. Found a mistake? Report an error.