Biweekly Mortgage Calculator

Instead of one full payment a month (12 a year), you pay half the payment every two weeks. Because there are 52 weeks, that's 26 half-payments — equal to 13 full payments a year, one more than the standard 12. The extra payment goes straight to principal, shrinking the balance faster.

On a typical 30-year mortgage, paying biweekly shaves roughly 4–6 years off the loan and can save tens of thousands in interest, depending on your rate and balance. The higher your rate and balance, the bigger the savings — this calculator shows your exact numbers.

The savings are real, but you can get the same result for free: just pay an extra 1/12th of your payment toward principal each month, or make one extra payment a year. Avoid third-party 'biweekly programs' that charge setup or transaction fees — you're paying for something you can do yourself.

Not all lenders process true biweekly schedules, and some hold half-payments until a full one accumulates, erasing the benefit. Confirm your servicer applies extra amounts to principal immediately. If not, the simplest reliable method is adding extra principal to your normal monthly payment.