The trick behind biweekly payments
There are 52 weeks in a year, so paying half your mortgage payment every two weeks means 26 half-payments — equal to 13 full monthly payments instead of 12. That one extra payment per year goes straight to principal, and because it happens every year, it quietly shaves years off a 30-year loan and saves a large amount of interest. The clever part: split into biweekly chunks, the extra payment barely registers in your budget.
How much it saves
On a $300,000 mortgage at 6.5% over 30 years, switching to biweekly payments pays the loan off roughly 4–5 years early and saves tens of thousands in interest — purely from timing, without consciously "finding" extra money. This calculator models the effect by adding one extra monthly payment per year to the schedule.
Important cautions
- Beware paid "biweekly programs." Some lenders or third parties charge setup and per-payment fees to administer this. Don't pay for it — the identical result comes free from simply adding 1/12 of a payment to your monthly amount, or making one extra payment yourself each year.
- Confirm principal application. The savings only materialize if the extra goes to principal and the lender actually credits payments biweekly rather than holding them.
- Same math, your control. If your lender won't do true biweekly for free, use our extra payment calculator and add the equivalent amount monthly — you keep full control and pay no fees.
Biweekly payments are a painless behavioral hack: same money, better timing, meaningfully faster freedom from your mortgage.