Biweekly mortgage payments are one of the simplest “hacks” in personal finance — and one of the few that genuinely works. Instead of one monthly payment, you pay half your mortgage every two weeks. Because there are 26 biweekly periods in a year, you end up making 26 half-payments — the equivalent of 13 full monthly payments instead of 12. That one extra payment per year goes entirely toward principal, and the compounding effect is dramatic.
The Math: A $350,000 Example
Take a $350,000 loan at 6.5% for 30 years:
- Monthly payment: ~$2,212
- Standard schedule: 30 years, ~$446,000 in total interest
- Biweekly schedule: paid off in about 25 years, saving roughly $85,000–$95,000 in interest
Those five skipped years of payments are where the real win lives. Want to run your own numbers? Our free mortgage calculator lets you compare standard and accelerated schedules side by side, and the loan calculator works for any loan type.
How to Set Up Biweekly Mortgage Payments (3 Options)
1. Your lender’s biweekly program. Many servicers offer this directly. Ask two questions: does the extra money go to principal immediately, and is there a setup fee? Some lenders charge for the privilege — do not pay more than a nominal fee.
2. DIY biweekly. Simply divide your monthly payment in half and set up automatic transfers every two weeks to a dedicated savings account, then pay the mortgage monthly from it, adding the accumulated extra once a year. Free, and you stay in control.
3. Just add 1/12 extra monthly. If biweekly feels fiddly, add one-twelfth of your payment to each monthly payment. Mathematically identical result, zero setup.
Before committing, check your loan for prepayment penalties — rare on modern US mortgages, but verify. Also confirm extra payments are applied to principal, not held as “unapplied funds.”
When Biweekly Payments Are a Bad Idea
This strategy is not for everyone. Skip it if:
- You carry high-interest debt (credit cards at 20%+). Every extra dollar earns more killing that debt first — map it with the debt payoff calculator.
- You have no emergency fund. Extra mortgage payments are illiquid; a job loss with no cash cushion is worse than a slightly longer mortgage.
- Your mortgage rate is very low and you could earn more investing the difference. At 3% mortgage rates, long-term market returns often win — though the guaranteed return of debt payoff has real psychological value.
Also beware third-party “biweekly companies” that charge hundreds in setup fees for something your lender or bank does free.
Biweekly vs. Extra Monthly Payments: Which Wins?
They are nearly identical if the extra amount matches. Biweekly wins on convenience — it is automatic and painless — while lump extra payments win on flexibility (skip a month if cash is tight). The best strategy is the one you will actually sustain for years.
That said, biweekly mortgage payments stand out for one reason: the extra principal payment happens by default, so you never have to decide to make it. That automation is what makes the strategy work.
Thinking of buying? Check how much house you can afford before you shop, so the payment you accelerate is one you can comfortably carry.
FAQ
Do biweekly mortgage payments really save that much?
Yes — the savings come from one extra principal payment per year plus interest compounding on a shrinking balance. On a typical 30-year loan, expect 4–6 years shaved off and tens of thousands saved, depending on rate and balance.
Will my lender automatically apply extra payments to principal?
Not always. Some servicers hold partial extra payments as “unapplied funds” until they total a full payment. Always specify “apply to principal” in writing and verify on your statement.
Is there a downside to biweekly mortgage payments?
The main downside is opportunity cost: money locked into home equity is illiquid and may earn less than paying high-interest debt or investing. It is a great strategy once high-interest debt is gone and an emergency fund exists.
Can I do biweekly payments on a 15-year mortgage?
You can, and it still saves interest — though the absolute savings are smaller since 15-year loans already amortize fast. Run the comparison in our mortgage calculator to see your exact numbers.