Biweekly vs Monthly Mortgage Calculator

How Biweekly Mortgage Payments Work

A biweekly mortgage payment schedule splits your standard monthly payment in half and pays that amount every two weeks instead of once a month. Because there are 52 weeks in a year, you make 26 half-payments annually — the equivalent of 13 full monthly payments instead of the standard 12. That extra payment goes entirely toward reducing your principal balance, which means you build equity faster and pay less interest over the life of the loan.

For example, on a $350,000 mortgage at 6.5% over 30 years, the standard monthly payment is approximately $2,212. With biweekly payments, you pay $1,106 every two weeks. Over a full year, that totals $28,756 — roughly one extra monthly payment compared to $26,544 with monthly payments. According to the Consumer Financial Protection Bureau (cfpb.gov), this simple shift can shave 4 to 6 years off a 30-year mortgage and save tens of thousands in interest.

How Much Can You Save?

The savings from biweekly payments depend on your loan amount, interest rate, and remaining term. On a typical $350,000 loan at 6.5% interest (near the Freddie Mac (freddiemac.com) 2026 average rate for a 30-year fixed mortgage), switching to biweekly payments can save approximately $60,000 to $80,000 in total interest and pay off the loan roughly 5 years early. The higher your interest rate, the greater the benefit — because more of each early payment would have gone to interest under the monthly schedule.

Even modest extra payments compound significantly over time. The key insight is that biweekly payments reduce the principal balance faster, so each subsequent payment allocates a slightly larger portion to principal and less to interest. This compounding effect accelerates as the loan matures.

Biweekly vs Extra Monthly Payment

Making biweekly payments is mathematically identical to making 12 regular monthly payments plus one extra principal-only payment per year (equal to one monthly payment, split across the year). If your lender does not offer a true biweekly program, you can achieve the same result by adding 1/12 of your monthly payment to each month's check as an extra principal payment. Both strategies produce nearly identical savings.

The advantage of a formal biweekly program is automation — payments align with biweekly pay schedules, making budgeting easier for many households. The disadvantage is that some third-party biweekly services charge enrollment or processing fees, which can reduce your savings. The DIY approach (extra monthly principal) costs nothing and gives you the same financial benefit. Use the "Extra Monthly Payment" field in this calculator to compare both strategies directly.

Should You Switch to Biweekly Payments?

Biweekly payments make sense for most borrowers who can comfortably afford the slightly higher annual outlay. Consider these factors before switching:

• Pros: Pay off your mortgage years earlier, save thousands in interest, build equity faster, and align payments with biweekly paychecks for easier budgeting.
• Cons: Slightly higher annual cost (13 payments vs 12), some lenders charge fees for biweekly programs, and the money used for extra payments could potentially earn a higher return if invested elsewhere.
• DIY alternative: If your lender does not offer free biweekly payments, simply divide your monthly payment by 12 and add that amount as extra principal each month — same savings, zero fees.
• Check with your lender: Confirm they apply biweekly payments immediately to principal rather than holding funds until month-end, which would reduce the interest savings.

For borrowers with high-interest mortgages (above 5%), biweekly payments are almost always beneficial. For those with very low rates (below 3%), the extra funds may be better deployed toward higher-return investments. Source: cfpb.gov, freddiemac.com. Last updated: April 2026.