26 half-payments
Paying every 14 days creates 26 half-payments in most years.
Biweekly Mortgage Payment Calculator
Estimate the effect of making 26 half-payments each year instead of 12 monthly payments.
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Calculation details
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Estimated interest saved$88,121.78
Biweekly payment$948.10
Estimated time saved5 yr 10 mo
Biweekly payments628
Assumes 26 payments per year, each equal to half the normal monthly payment. Confirm that your lender applies biweekly payments to principal without fees or delayed posting.
Understand the schedule
Biweekly payments are not the same as twice monthly
A true every-two-weeks schedule produces two months each year with three half-payments. Those 26 half-payments equal 13 full monthly payments, which is why the balance can fall faster.
13 monthly equivalents
Twenty-six halves add up to one extra full monthly payment each year.
Posting rules matter
Savings depend on the lender applying partial payments promptly and without offsetting fees.
What the comparison assumes
The monthly schedule uses 12 equal payments per year. The biweekly schedule uses half the monthly amount every two weeks and compounds interest over 26 periods.
The estimate holds the interest rate constant and excludes taxes, insurance, escrow, and program fees.
Check the lender program first
Some servicers hold a half-payment until the other half arrives. Others offer formal biweekly programs or charge enrollment and transaction fees.
If true biweekly posting is unavailable, making one additional principal payment per year may create a similar payment total, but timing can change the result.
Confirm your lender’s payment-posting policy before relying on estimated savings. This tool does not represent a lender offer or guarantee a payoff date.
How this calculator works
A true biweekly schedule pays half the normal monthly amount every two weeks. That produces 26 half-payments—or 13 monthly equivalents—per year instead of 12.
Change any input to update the estimate instantly. Your entries never leave your device.
Read how SimpleCalc defines formulas, assumptions, and accuracy checks.
Frequently asked questions
Why can biweekly payments save interest?
Twenty-six half-payments equal 13 full monthly payments per year, so more principal is paid over the year.
Will every lender process payments this way?
No. Some lenders hold partial payments until a full payment is available or charge program fees. Confirm the posting policy first.
Is this the same as paying twice a month?
No. Twice-monthly payments produce 24 half-payments, while true biweekly payments produce 26.