Mortgage Extra Payment Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the loan amount, rate, term and an extra monthly payment.
- Read the interest and time saved.
How it works
Computes the scheduled payment, then re-runs the amortisation with your extra payment added and compares the two.
Worked example
$500k, 6%, 30 yr, +$200/mo. Saves years off the loan and tens of thousands in interest.
Tips
- Estimate only — not financial advice.
Frequently asked questions
Are extra payments worth it?
Early extra payments save the most because more of each early payment is interest.
Privacy?
Runs entirely in your browser. Your inputs are not saved or transmitted.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.