Mortgage Prepayment Calculator
Extra payments go straight to principal. See how much interest monthly top-ups and yearly lump sums save over the life of your mortgage.
Calculator
Results update as you type · Nothing you enter leaves your browser
Interest saved
$86,990
$181,946 instead of $268,937
Mortgage-free sooner by
7.4 years
Paid off in 17.6 years; regular payment $2,396.46
Assumes the rate stays the same for the whole period and that your contract allows these prepayments without a penalty.
Prepayment privileges
Your mortgage contract sets how much you can prepay each year without a penalty, for example by increasing payments or making lump-sum payments. Limits differ by lender and product, and paying more than allowed on a closed mortgage can trigger a penalty.
Sources
Rules are summarized in our own words from official publications. Check the source and talk to your lender or a licensed professional before making a decision.
Informational only, not financial advice. Data as of the release snapshot generated 2026-11-12.