🏠 Mortgage Payoff Calculator
See how much time and interest you can save by making extra monthly payments toward your mortgage principal.
Loan Details
Your Result
Calculations use the standard amortizing monthly payment for your original balance, rate, and term, with the extra amount applied directly to principal each month.
How the Mortgage Payoff Calculator Works
Making extra payments toward your mortgage principal reduces the balance faster, which means less interest accrues over the life of the loan and you pay it off sooner. This calculator compares your original amortization schedule to one with extra monthly payments applied.
Formula
Each month: Interest = Balance × (Rate / 12 / 100)
Principal Paid = Payment + Extra − Interest
New Balance = Balance − Principal Paid
Where P is the original balance, r is the monthly interest rate, and n is the number of monthly payments in the original term.
Frequently Asked Questions
How much can extra payments really save?
Even modest extra payments can save years of payments and thousands of dollars in interest because every extra dollar goes directly toward reducing principal, which reduces future interest charges.
Should I make extra payments or invest the money instead?
It depends on your mortgage rate versus expected investment returns, your risk tolerance, and other financial goals. Paying down debt provides a guaranteed "return" equal to your interest rate.
Do extra payments automatically go toward principal?
Not always — check with your lender to make sure extra payments are applied to principal rather than future scheduled payments or escrow.