Biweekly mortgage calculator
Estimate how half-payments every two weeks could affect mortgage payoff timing and total interest compared with standard monthly payments.
Biweekly Payment
$0What it does
The calculator estimates the standard monthly payment, then models accelerated biweekly payments as 26 half-payments per year. That is roughly one extra monthly payment each year.
The result shows the estimated biweekly payment, payoff time, interest saved, and time saved versus the monthly plan.
How to use it
Enter your mortgage balance, interest rate, and remaining term. The calculator automatically compares the standard monthly payment with accelerated biweekly payments.
Before using a biweekly plan, ask the loan servicer whether payments are applied immediately to principal or held until the monthly due date.
Important limit
Some servicers offer official biweekly programs, while others require manual extra principal payments. Fees, holding practices, and posting schedules can change the real benefit.
How it works
A standard monthly mortgage has 12 full payments per year. An accelerated biweekly plan makes 26 half-payments per year, which equals 13 full monthly payments over a year.
That extra annual payment reduces principal sooner. Lower principal means less interest accrues over time, so the payoff date can move forward even though each individual biweekly payment is only half of the monthly amount.
What affects it
The remaining balance, interest rate, loan term, and how quickly extra principal is applied all affect savings. The benefit is usually larger when the rate is higher or when the loan has many years left.
If the mortgage is near payoff, the savings may be smaller because there are fewer interest-heavy months remaining. If the servicer delays applying half-payments, the actual benefit can also differ from the estimate.
FAQ
Is biweekly the same as twice monthly? No. Twice monthly is usually 24 half-payments per year, while biweekly is 26.
Does this include escrow? No. It focuses on principal and interest payoff, not taxes or insurance.
Can I do this manually? Often yes, but confirm how your servicer applies extra principal and whether any fees apply.
Should I keep my regular due date? Yes. Stay current on the required monthly payment first, then treat the biweekly strategy as an acceleration plan.