Switching from monthly to biweekly mortgage payments is one of the most quoted “free money” tips in personal finance — and for once, the hype is mostly justified. Pay half your monthly payment every two weeks and you make the equivalent of 13 full payments a year instead of 12. That extra payment goes straight to principal, and the effect on your payoff timeline is surprisingly large.
Run the numbers for your own loan with our Biweekly Mortgage Calculator — enter your balance, rate, and term to see exactly how much time and interest you save.
Why Biweekly Payments Work
The math is simple but easy to miss. A year has 52 weeks, so paying every two weeks means 26 half-payments per year — that is 13 full monthly payments. The “extra” payment each year is applied entirely to principal because your regular interest is already covered by the other 12 payments. Less principal means less interest accrues, and the effect compounds year after year.
| Payment Plan | Payments per Year | Total Paid per Year |
|---|---|---|
| Monthly | 12 | 12 × monthly payment |
| Biweekly | 26 half-payments | 13 × monthly payment (one extra) |
How Much Time and Interest Do You Save?
The savings depend on your interest rate and remaining term. A few representative examples on a 30-year fixed loan:
| Loan Amount | Rate | Time Saved | Interest Saved |
|---|---|---|---|
| $200,000 | 6.0% | ~4 years 3 months | ~$38,000 |
| $300,000 | 6.5% | ~4 years 4 months | ~$62,000 |
| $400,000 | 7.0% | ~4 years 6 months | ~$91,000 |
| $250,000 | 5.0% | ~3 years 9 months | ~$31,000 |
Higher rates and larger balances produce bigger savings, but even a modest 5% loan shaves roughly four years off a 30-year term. Use the biweekly mortgage calculator with your actual numbers — the result is worth seeing in black and white.
The Catch: Setup Fees and Timing
There are two ways to go biweekly, and they are not equally good:
- Lender’s official biweekly program: Often charges a one-time setup fee ($100–$400) plus a small per-transfer fee. Convenient, but the fees eat into your savings.
- DIY method: Divide your monthly payment by 12 and add that amount to each monthly payment (the “13th payment” approach), or set up automatic transfers every two weeks from your own account and tell the lender to apply the extra to principal. Zero fees.
If you go the DIY route, confirm with your lender that extra payments are applied to principal, not treated as early payment of the next installment. A few lenders hold extra funds in suspense until the next due date, which delays the benefit.
When Biweekly Payments Do NOT Make Sense
- High-interest debt elsewhere: If you carry credit card or auto debt above 8–10%, paying that down first beats prepaying a 6% mortgage.
- Tight cash flow: The extra payment is mandatory once you commit; if two paychecks a month sometimes have to stretch, a monthly “extra payment when you can” plan is safer.
- You may move soon: If you expect to sell within a few years, the interest savings are small — most of the benefit builds in later years.
- No emergency fund: Build 3–6 months of expenses before tying up extra cash in your home.
Biweekly vs. Making One Extra Payment a Year
Financially, biweekly payments and “add 1/12 to each monthly payment” are nearly identical — both put one extra monthly payment toward principal per year. The difference is discipline: biweekly automates the habit so you never skip it. If you can trust yourself to make the extra payment annually, the DIY monthly method achieves the same result with zero setup. If not, the automated biweekly schedule is worth the fees.
See how much sooner you can own your home free and clear — check your savings with the biweekly mortgage calculator.
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