Mortgage planning tool
Extra Mortgage Payment Calculator
See how additional monthly principal payments may reduce payoff time and total interest.
Free, no sign-up: figures are calculated in your browser.
Your estimate
Enter your figures and calculate.
What this calculator does
Simulates monthly interest and principal reduction with and without the extra payment.
How to use it
- Enter realistic planning figures.
- Run the estimate and compare another scenario.
- Confirm important numbers with a lender or qualified professional.
Important assumptions
Educational estimate only. Actual rates, lender rules, fees, taxes, insurance, and personal circumstances vary.