Free mortgage payoff calculator: see your payment and pay off faster
Set your price, down payment, rate, and term to see your monthly payment and a live graph of how much goes to interest vs. principal — then add an extra monthly payment and watch how many years (and dollars) you save.
Estimate only, for US fixed-rate mortgages. Covers principal & interest — not property tax, insurance, HOA, or PMI. Not a loan offer.
How mortgage amortization works — and why early payments barely move the needle
Every fixed mortgage payment is the same amount, but what it’s made of changes every month. Early on, most of your payment is interest and only a sliver pays down the balance. As the balance shrinks, the interest portion falls and more goes to principal. That’s amortization — and it’s why the chart above starts steep and flat, then curves down faster near the end.
Because early payments are mostly interest, even a small extra principal payment goes straight to the balance and compounds in your favor. On a $360k loan at 6.5%, an extra $200/month can cut roughly 6–8 years off a 30-year mortgage and save tens of thousands in interest. Drag the extra-payment slider to see your own numbers.
What actually changes your payoff speed
- Extra payments: the most direct lever you control — every extra dollar skips all its future interest.
- Interest rate: a lower rate means less interest and faster equity, which is why refinancing can help when rates drop.
- Loan term: a 15-year loan has higher payments but builds equity far faster and costs a fraction of the interest.
- Down payment: a larger down payment shrinks the loan and the total interest from day one.
Should you pay off early?
Paying down a mortgage is a guaranteed, tax-free return equal to your interest rate — attractive when rates are high. But weigh it against retirement contributions, an emergency fund, and higher-interest debt first. If your renovation dollars would earn more than your mortgage rate at resale, that may win instead — check with our Renovation ROI Calculator and read the Home Value guide.