Mortgage Payoff Calculator (Extra Payments)
Mortgage payoff calculator: how much sooner you pay off your mortgage and how much interest you save by adding an extra payment every month.
n = months until balance = 0 with payment M + extra
How to use this calculator
- Type your input in the box.
- The result updates as you type.
- Use “Copy result” or “Copy link” to share it.
Extra money goes straight to principal, so every later month accrues less interest. Even small amounts shorten the loan by years.
Check that your lender allows prepayments without penalty.
Estimates for planning only; not financial advice. Your lender’s or provider’s figures may differ.
Frequently asked questions
$200,000 left at 6.5 % over 25 years, paying $200 extra a month?
Paid off in 223 months instead of 300 — 6 years 5 months sooner — saving about $60,783 in interest.
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