About Loan Payoff Calculator

Loan Payoff Calculator is a free, privacy-first tool that helps you understand exactly how your loan works — and how extra payments can save you thousands of dollars in interest.

What it does

Enter your loan amount, interest rate, and term to instantly see your monthly payment and a full amortization schedule. Add optional extra monthly or annual payments to compare scenarios side by side.

Who it is for

Anyone with a fixed-rate loan — mortgage, auto loan, student loan, or personal loan — who wants to plan smarter repayment and reduce total interest paid.

Privacy

All calculations happen entirely in your browser. No personal data, financial information, or loan details are ever sent to our servers.

Our mission

We built Loan Payoff Calculator to make loan math transparent. Too many borrowers see a monthly payment without understanding how much interest they will pay over time or how extra payments change the outcome. Our goal is to give you clear numbers, visual schedules, and plain-language guides so you can plan repayment with confidence.

How we calculate

The calculator uses standard fixed-rate amortization formulas. Given a loan amount, annual interest rate, and term, it computes a level monthly payment, then builds a schedule that allocates each payment between interest and principal. Optional extra monthly or annual payments are applied to principal according to the timing you select. All processing happens in your browser; we do not store your inputs on our servers.

Educational guides

Beyond the calculator, we publish original guides on topics such as how amortization works, strategies for extra mortgage payments, and the loan payment formula. Each guide is written to stand alone while linking back to the tool so you can model your own loan immediately. Browse all guides

Get in touch

Questions, corrections, or suggestions are welcome. Visit our Contact page — we will publish an email address there when it is available. Contact page