Mortgage Payoff Calculator
Interest and time saved by paying extra each month
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Current monthly payment—
Payoff time with extra (months)—
Interest saved—
Time saved (months)—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- $250,000 remaining, 6.5%, 25 years, +$200/mo extra → Payment $1,688.02; payoff 234 months; saves $64,609.18 and 66 months
- $250k mortgage, 6%, 25 yr, +$300/mo extra → Payoff drops 87 months (213 vs 300); save ≈ $76,236 interest
Formula
Compare the original amortization against one with (payment + extra). Savings = original total interest − new total interest. Extra payments applied to principal early in the loan save the most, because interest is front-loaded in a standard amortization schedule.
About Mortgage Payoff Calculator
Interest and time saved by paying extra each month. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.