Biweekly Mortgage Calculator
Paying half your mortgage every two weeks sneaks in one extra payment a year. See how many years and how much interest that shaves off.
Mortgage payoff and extra-payment tools
Learn moreOne extra payment a year
There are 26 biweekly periods in a year, so paying half your monthly amount every two weeks equals 13 monthly payments instead of 12. That one extra payment goes straight to principal, compounding into years of saved interest.
How it’s calculated & sources
We compute the standard monthly payment, then simulate payoff while paying 13÷12 of it each month (the biweekly equivalent), and compare total interest and payoff time.
Benchmark: biweekly payments typically cut a 30-year mortgage by ~4–6 years and save tens of thousands in interest.
Results update as you type and are general estimates, not personalized financial, tax, medical or legal advice. Verify with a professional.
Worked example
On a $350,000 loan at 6.5% over 30 years, biweekly payments pay it off nearly 6 years early and save about $100,000 in interest.
Frequently asked questions
Does my lender have to offer this?
You don’t need a formal program — just pay an extra 1⁄12 of your payment toward principal monthly, or make one extra payment a year. Avoid third-party services that charge fees.
Any downside?
Only the tighter cash flow. Make sure extra payments are applied to principal, and keep an emergency fund first.