Biweekly Mortgage Payment Calculator

How to Use This Calculator

Step 1: Enter Your Loan Amount and Interest Rate

Enter your current mortgage balance or the loan amount if you're planning a new mortgage. Then add your interest rate.

Step 2: Select Your Loan Term

Choose your loan term - typically 15 or 30 years. If you already have a mortgage, use the remaining term.

Step 3: Compare Monthly vs Biweekly Payments

Review the side-by-side comparison to see exactly how much you'll save in interest and how much sooner you'll pay off your mortgage with biweekly payments.

What Are Biweekly Mortgage Payments?

How Biweekly Payments Reduce Your Mortgage

A biweekly mortgage payment plan splits your monthly mortgage payment in half and pays that amount every two weeks. Because there are 52 weeks in a year, you end up making 26 half-payments, which is equivalent to 13 full monthly payments instead of the usual 12. That extra payment each year goes directly toward your principal balance, reducing the amount of interest that accrues in every subsequent period. Over the life of a 30-year loan, this simple change can shave years off your payoff timeline and save tens of thousands of dollars in interest.

Biweekly vs Monthly Mortgage Payments Compared

With a standard monthly schedule on a $300,000 mortgage at 6.5%, you would pay roughly $382,000 in total interest over 30 years. Switching to biweekly payments reduces your total interest and shortens the loan by approximately 4 to 5 years. The monthly payment amount stays exactly the same per dollar — you are simply splitting each payment and making it more frequently. The savings come entirely from the extra annual payment and the more frequent principal reduction.

Who Benefits Most from Biweekly Payments

Biweekly payments provide the greatest benefit to borrowers with higher interest rates, larger loan balances, and longer remaining terms. If you are early in a 30-year mortgage, the compounding savings from biweekly payments are at their peak because interest represents a larger share of each early payment. Homeowners closer to payoff will still save, but the impact is more modest. If you want to accelerate your payoff further with lump-sum or additional monthly contributions, try our early mortgage payoff calculator.

Frequently Asked Questions

How much can biweekly payments save on a mortgage?

On a typical 30-year mortgage, switching to biweekly payments can shave 4 to 6 years off your loan term and save tens of thousands of dollars in interest. The exact savings depend on your loan balance, interest rate, and remaining term — higher interest rates and larger balances produce bigger savings. Use this calculator to see your specific numbers.

Why do biweekly mortgage payments save money?

Biweekly payments save money because you make 26 half-payments per year, which equals 13 full monthly payments instead of the standard 12 — effectively adding one extra full payment every year. That extra payment goes entirely toward reducing your principal balance, which in turn reduces the amount of interest that accrues each month. Over time, this compounding effect dramatically shortens your loan term.

Do all lenders accept biweekly payments?

Not all lenders offer a true biweekly payment program — some will simply hold your half-payments and apply them monthly, which eliminates the interest savings benefit. Before setting up biweekly payments, confirm with your servicer that payments will be applied immediately upon receipt rather than held. If your lender doesn't support biweekly payments, you can achieve the same effect by making one extra principal payment each year.

Can I just make one extra mortgage payment per year instead?

Yes — making one extra full mortgage payment per year directed entirely at principal produces a very similar result to a biweekly payment plan. This approach works well for homeowners who receive an annual bonus, tax refund, or other lump-sum income. Just make sure to specify that the extra payment should be applied to principal only, not to future scheduled payments, when submitting it to your lender.

What is the difference between biweekly and semi-monthly mortgage payments?

Biweekly and semi-monthly sound similar but work differently. Semi-monthly payments are made twice per month, typically on the 1st and 15th, totaling 24 payments per year. Biweekly payments are made every two weeks, totaling 26 payments per year. The critical difference is those two extra payments: biweekly schedules produce one additional full monthly payment per year, which is where the interest savings come from. Semi-monthly payment plans do not produce this extra payment and therefore do not offer the same payoff acceleration.

How do I set up biweekly mortgage payments with my lender?

Contact your mortgage servicer to ask if they offer a biweekly payment program. Some lenders provide this as a free service, while others charge an enrollment or per-payment fee that can eat into your savings. If your lender does not offer biweekly payments or charges high fees, you can replicate the effect yourself by dividing your monthly payment by 12 and adding that amount as extra principal each month. This produces the same result as one extra full payment per year without any enrollment fees.