Biweekly vs Monthly Mortgage Payments: The Interest Savings
Making biweekly payments instead of monthly is one of the simplest ways to pay off your mortgage faster without refinancing. By paying half your monthly payment every two weeks, you end up making 26 half-payments per year — the equivalent of 13 full monthly payments instead of 12. That one extra payment per year pays down your principal faster and can shave 4–6 years off a 30-year mortgage.
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There are 52 weeks per year. Biweekly payments = 26 half-payments = 13 full payments vs. the standard 12. That 13th payment goes entirely to principal reduction, which reduces the balance that interest accrues on every subsequent month. Compounded over 30 years, this creates substantial savings.
Is there a fee to set up biweekly payments?
Some banks charge setup fees for formal biweekly programs — avoid these. Instead, simply divide your monthly P&I payment in half and pay that amount every two weeks, OR add 1/12 of your monthly payment to each monthly payment. Both approaches achieve the same result for free.
How much interest does biweekly payment save on a $400,000 mortgage?
On a $320,000 loan (20% down on $400k) at 7% for 30 years, making biweekly payments saves approximately $65,000–$75,000 in interest and pays off the loan about 5 years early. Use the Extra Payment calculator in NestCalcs to see the exact numbers for your loan.
Does biweekly payment affect my credit score?
No negative effect — payments that arrive early or on time are reported as current. Making more frequent payments doesn't hurt your credit. If anything, the faster principal paydown improves your loan-to-value ratio, which can help when you eventually refinance.
Is biweekly better than making lump sum extra payments?
They achieve similar results. Biweekly is automatic and builds discipline. Lump sum payments give you flexibility — you can make a large extra payment when you have extra cash (bonus, tax refund) and skip it when money is tight. For most people, the biweekly habit is easier to sustain.