Bi-Weekly Mortgage Payment Calculator

Instead of making one full mortgage payment each month, you split it in half and pay that amount every two weeks. With 52 weeks in a year, you make 26 half-payments, the same as 13 full monthly payments instead of 12. The extra payment goes to principal each year, which cuts interest and moves up your payoff date. On a 30-year loan the calculator above shows how many years and how much interest that saves for your balance and rate.

Many mortgage servicers can set up a bi-weekly plan, though policies vary. Some apply each half-payment as it arrives, while others hold the funds and apply them as a full monthly payment plus a principal reduction. The result is usually the same, but the mechanics matter. If your servicer doesn't offer bi-weekly, you can get the same effect by adding 1/12 of your monthly payment to each scheduled payment. Confirm with your servicer that extra funds go to principal, not held in suspense or applied to future payments.

Adding 1/12 of your monthly payment to each month produces nearly the same savings as a true bi-weekly schedule and gives you more flexibility. Bi-weekly works well if your paychecks already arrive every two weeks, because the timing matches your cash flow. If you're paid monthly, the do-it-yourself approach is often easier and avoids third-party enrollment fees. Either way, what matters is the extra annual payment going to principal. Pick the method you're most likely to keep up.

Some servicers and third-party companies charge enrollment fees of $300 to $400 plus transaction fees of $2 to $10 per draft. Those charges can eat into the interest savings you're trying to capture. Before signing up for a paid program, ask your servicer whether they offer it for free, or set up your own automatic extra principal payment with no fees at all. The strategy itself costs nothing; you should never pay a premium to pay down your own loan.

A missed half-payment doesn't automatically trigger a late report, because lenders generally report a payment as late only once it's 30 days past the monthly due date. As long as your full monthly amount is paid within that window, your credit isn't affected. Falling behind on a bi-weekly schedule can snowball because the timing is tighter, so set up automatic drafts, keep a small cushion in checking, and ask your servicer how partial payments are handled.