See how switching from monthly to bi-weekly payments shortens your mortgage and how much interest you save — instantly.
Instead of making one full mortgage payment per month (12 payments/year), bi-weekly payments mean you pay exactly half your monthly amount every two weeks — 26 half-payments per year.
26 half-payments = 13 full monthly payments. That one extra monthly payment per year, applied entirely to your principal, is what creates the savings.
You're not paying more per month on average — you're paying the same weekly rate but structured so one extra full payment lands each year automatically.
On a $520,000 mortgage at 6.25% over 25 years, switching to bi-weekly payments typically saves around $35,000–$45,000 in interest and cuts approximately 2–3 years off the loan. The higher your interest rate, the more you save.
Want to model a specific extra monthly amount instead? Use our Extra Payment Calculator — or see your full year-by-year breakdown with the Amortization Schedule Calculator.