Biweekly Mortgage Calculator

A biweekly mortgage payment plan means paying half of your regular monthly mortgage payment every two weeks, rather than one full payment once a month. It sounds like a small change, but the calendar makes it powerful: there are 52 weeks in a year, so paying every two weeks produces 26 half-payments — the equivalent of 13 full monthly payments annually instead of 12. That one extra payment each year goes entirely toward principal.

The effect compounds over the life of the loan. Because mortgage interest is charged on the outstanding balance, knocking down the principal faster means less interest accrues every subsequent period, so even more of each future payment attacks the balance. On a typical 30-year mortgage, switching to biweekly payments can shorten the term by roughly four to six years and save a substantial five-figure sum in interest — all without a dramatic change to your budget, since you're paying the same amount each month, just split and timed differently.

Biweekly payments also align naturally with biweekly paychecks, which many people receive, making the habit easy to automate and sustain. The discipline is largely automatic once set up, which is part of the appeal compared with manually adding extra each month.

There are a few cautions. Some lenders or third-party services charge enrollment or transaction fees to set up a formal biweekly program — you can usually achieve the identical result for free by simply making one extra monthly payment per year, or dividing your payment by 12 and adding that amount monthly. Confirm your lender applies the extra promptly to principal and that there's no prepayment penalty. Also ensure the accelerated payoff fits your broader priorities; if you carry higher-interest debt or haven't captured a retirement match, those may deserve the money first.

For borrowers with a stable budget who want to build equity and own their home sooner, biweekly payments are one of the simplest, lowest-effort strategies available. This calculator shows precisely how much time and interest the approach would save on your specific loan.