See how paying half your mortgage every two weeks shortens your loan and saves interest.
Why 26 payments equal 13 months
A biweekly schedule means you pay half your monthly mortgage amount every 14 days — 26 half-payments a year, which adds up to 13 full monthly payments instead of 12. That one extra payment goes entirely toward principal, so your balance drops faster and every future interest charge is computed on a smaller balance. On a $300,000 loan at 6.5%, that single extra payment a year cuts roughly six years off a 30-year mortgage and saves over $88,000 in interest, with no change to your monthly budget rhythm.
Who benefits most from biweekly payments
Biweekly works best for borrowers paid every two weeks, because the payment lines up with payday and the “extra” payment feels invisible. It also shines early in the loan, when most of each payment is interest — extra principal then has the biggest compounding effect. If you are already deep into a 30-year loan, the remaining savings are smaller, and directing the same money toward higher-interest debt may win. Compare this with simply adding one-twelfth of your payment to each monthly check: the math is nearly identical, so pick whichever you will actually stick with.
Watch out for lender “biweekly programs”
Some lenders and third-party companies sell biweekly payment programs with setup fees or monthly charges that eat into your savings. You do not need them. You can usually achieve the same result for free by dividing your monthly payment by 12 and adding that amount to each payment, marked “apply to principal.” Before enrolling in anything, confirm in writing that extra amounts are applied to principal immediately — not held in a suspense account until a full payment accumulates — and that there is no prepayment penalty on your loan.
How does paying biweekly save interest?
You make 26 half-payments a year, equal to 13 monthly payments. The extra payment reduces principal, so interest accrues on a smaller balance every period after that — the savings compound over the life of the loan.
Is biweekly the same as making one extra payment a year?
Essentially, yes. Both add one extra monthly payment per year toward principal. Biweekly just spreads it across 26 paydays, which many people find easier to budget than one lump sum.
Do all lenders accept biweekly payments?
Most servicers accept partial or extra payments, but crediting rules differ. Some hold partial payments until a full monthly amount accumulates, which kills the benefit. Ask your servicer how extra payments are applied before you start.
Should I use my lender’s biweekly program?
Usually not if it charges fees. You can replicate the effect for free by adding one-twelfth of your payment to each monthly payment and marking it for principal. Run the numbers with any fee included before signing up.
What if I have an adjustable-rate mortgage (ARM)?
Biweekly payments still reduce principal and interest on an ARM, but rate adjustments change your payment amount, so the payoff timeline is an estimate. The strategy is most predictable on fixed-rate loans.