About PayoffTool

PayoffTool builds free, easy-to-use financial calculators that help everyday homeowners and borrowers make clearer decisions about debt. We started with one simple goal: make it obvious how much money and time you can save by paying a little extra toward your mortgage.

What makes our calculators different

• 100% private. Every calculation runs inside your own web browser. We never receive, store, or transmit the numbers you enter.
• No signup, no paywall. The tools are free to use, with no account required.
• Genuinely useful output. We show a full amortization schedule and a side-by-side comparison, not just a single number.

How we make money

The site is supported by advertising. Ads let us keep the calculators free for everyone. We do not sell your data — and because the calculators run locally, there is no calculation data for us to sell.

About the methodology

Our mortgage calculations use the standard fixed-rate amortization formula, computing interest on the outstanding balance each month and applying any extra payments directly to principal. Results are estimates and assume a fixed rate and on-time payments; your real loan may include escrow, fees, or servicer-specific rules. Our calculators are educational tools and are not a substitute for advice from a licensed financial professional.

Contact

Questions, corrections, or suggestions? Visit our contact page — we read everything.