Biweekly Mortgage
Calculator

Biweekly payments (every two weeks) add up to 26 half-payments a year, which equals 13 full monthly payments instead of 12. That one extra payment per year goes straight to principal, shortening the loan and cutting total interest paid.

Yes. Paying twice a month (semimonthly) is 24 payments a year and matches your normal payment schedule exactly, with no extra principal. A true biweekly schedule pays every 14 days, producing 26 payments a year, which is the extra 13th payment that creates the savings.

The payoff date moves up because the extra annual payment reduces the outstanding balance faster than the original amortization schedule assumed. Even a few years shaved off a 30-year loan usually represents tens of thousands of dollars in avoided interest.

Yes, in most cases. Some lenders offer an official biweekly program, others will simply apply extra funds to principal if you note it, and some charge a setup fee or won't support it at all. Confirm with your servicer before assuming the calculator's schedule matches what will actually happen to your account.

No, they typically increase it slightly since you're paying more per year, not less. The benefit is interest savings and a shorter term, not a lower monthly bill — if you need lower monthly payments, this tool isn't the right fit.