Biweekly Mortgage Payments: How Much Interest Can You Really Save?
Switching to biweekly mortgage payments can save $30,000+ in interest and shave years off your loan. Here's exactly how it works and whether it's right for you.
Most mortgages are structured around 12 monthly payments per year. By switching to biweekly payments — paying half your monthly amount every two weeks — you make 26 half-payments, which equals 13 full payments annually. That one extra payment per year creates surprisingly large savings.
How Biweekly Payments Work
There are 52 weeks in a year. Paying biweekly means you pay every two weeks:
| Payment Type | Payments Per Year | Annual Total Paid |
|---|---|---|
| Monthly ($2,075/mo) | 12 | $24,900 |
| Biweekly ($1,037.50 per 2 wks) | 26 | $26,975 |
| Extra payments per year | — | $2,075 (1 full payment) |
That extra $2,075 hits your principal every year. Because mortgage interest compounds daily (or monthly, depending on your loan), reducing principal early creates an accelerating snowball effect — each extra dollar reduces the balance on which future interest is calculated.
Real Numbers: $320,000 Loan at 6.75% for 30 Years
| Monthly Payments | Biweekly Payments | Savings | |
|---|---|---|---|
| Total Interest Paid | $427,000 | $363,000 | $64,000 |
| Loan Payoff Time | 30 years | 25 yrs 8 mo | 4 yrs 4 mo faster |
| Monthly Cash Impact | $2,075/mo | $2,075/mo* | — |
*Biweekly payments average out to the same monthly amount — the savings come purely from timing and that one extra annual payment.
Higher rate = bigger savings
At 7.5% on the same $320,000 loan, biweekly payments save $78,000 in interest and cut nearly 5 years from the loan. The higher your rate, the more valuable biweekly payments become.
How to Switch to Biweekly Payments
Option 1: Ask Your Lender Directly
Some servicers offer a formal biweekly payment program. Ask if they can automatically split your payment. Important: confirm they apply the extra amount directly to principal, not hold it until month-end. If they hold it, you get none of the interest savings.
Option 2: DIY Biweekly (Recommended)
Skip the lender program fees and do it yourself: make your normal monthly payment, then divide it by 12 and add that amount as an extra principal payment each month ($2,075 ÷ 12 = $173/month extra). This achieves the same result without any third-party fees.
Option 3: One Extra Annual Payment
Simply make one extra mortgage payment per year, applied entirely to principal. Many homeowners use a tax refund or year-end bonus for this. The math is identical to biweekly payments, just structured as a lump sum.
Is Biweekly Right for You?
Biweekly payments make the most sense when:
- •You are paid biweekly and want payments aligned with your paycheck
- •You plan to stay in the home long-term (10+ years to capture savings)
- •Your rate is relatively high (above 6%) — savings are most dramatic
- •You have no high-interest debt to prioritise first
- •You want guaranteed, risk-free interest savings vs. investing
It may not be worth it if:
- •You plan to sell or refinance within 5 years
- •You carry credit card debt at 20%+ — pay that off first
- •Your lender charges fees to set up biweekly payments
- •The extra payment would create financial strain
Beware third-party biweekly services
Some companies charge $300–$400 to set up biweekly payments on your behalf. This is completely unnecessary. Use the DIY method instead — it's free and achieves the same result.
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Disclaimer: All figures in this article are illustrative estimates. Actual mortgage rates, payments, and terms vary based on your credit score, lender, location, and market conditions. MortgageInsightHub is not a lender or financial advisor. Consult a licensed mortgage professional before making financial decisions.