Biweekly Mortgage Payments: Save Thousands with One Simple Change
Switching from monthly to biweekly payments can save $30,000+ in interest and shave 4-5 years off your mortgage. Here's exactly how it works.
Switching from monthly to biweekly mortgage payments can save you $30,000 to $75,000 in interest and eliminate 4 to 5 years from your mortgage — without earning a dollar more. The trick works because you end up making 13 full payments per year instead of 12. That single extra payment, applied to principal, compounds over the life of the loan and dramatically reduces your total interest.
How Biweekly Payments Work
With a standard mortgage, you make 12 monthly payments per year. With biweekly payments, you pay half your monthly amount every two weeks. Here is where the math gets interesting:
- Monthly schedule: 12 payments per year
- Biweekly schedule: 26 half-payments per year = 13 full payments per year
There are 52 weeks in a year. Paying every 2 weeks means 26 payments. Since each payment is half your monthly amount, 26 half-payments equals 13 full payments — one more than the standard 12.
That extra payment goes entirely toward principal reduction, which means less interest accrues on the remaining balance for every future payment.
Savings on a $336,000 Loan at 6.75%
Here are the real numbers on a typical loan ($420,000 home, 20% down, $336,000 mortgage):
| Monthly Payments | Biweekly Payments | Difference | |
|---|---|---|---|
| Payment amount | $2,179/month | $1,090 every 2 weeks | Same effective cash flow |
| Payments per year | 12 | 26 (= 13 full) | 1 extra payment |
| Payoff time | 30 years | 25 years, 5 months | 4 years, 7 months faster |
| Total interest paid | $448,440 | $375,200 | $73,240 saved |
| Total paid overall | $784,440 | $711,200 | $73,240 less |
You save over $73,000 in interest and own your home free and clear almost 5 years early.
3 Reasons Biweekly Payments Are So Effective
- One extra payment per year is the primary driver: An extra $2,179 going straight to principal every year reduces the balance faster, which means less interest accrues on every subsequent payment. This compounds over the full loan term.
- More frequent principal reduction: By paying every 2 weeks instead of monthly, your balance decreases slightly faster between billing cycles. Interest on a mortgage accrues daily — smaller, more frequent payments reduce the average daily balance.
- The compound effect over decades: Every dollar of extra principal payment in year 1 saves you roughly $2.10 in interest over the remaining 29 years (at 6.75%). That is why early extra payments are so powerful — they have the most time to compound.
How to Set Up Biweekly Payments
Option 1: Through Your Lender
Many mortgage servicers offer formal biweekly payment programs. Contact your servicer and ask about enrollment. Some important considerations:
- Some lenders offer it free; others charge a setup fee ($200-$400) or a per-payment fee ($2-$7 per transaction)
- Confirm payments are applied immediately, not held until the end of the month
- Confirm the extra amount goes to principal, not future payments
Option 2: DIY Method (Recommended)
Skip the lender program and do it yourself with no fees:
- Divide your monthly payment by 12: $2,179 / 12 = $182
- Add $182 to your regular monthly payment as extra principal
- You now make the equivalent of 13 payments per year
This method is simpler, avoids fees, and gives you the same result. Just make sure to specify that the extra amount should be applied to principal only — either through your lender's online portal or by noting it on your payment.
Combined Strategies: Biweekly Plus Extra Payments
Biweekly payments alone are powerful. Combine them with additional extra payments and the results are dramatic:
| Strategy | Payoff Time | Years Saved | Total Interest | Interest Saved |
|---|---|---|---|---|
| Standard monthly | 30 years | — | $448,440 | — |
| Biweekly only | 25 yrs, 5 mo | 4.6 years | $375,200 | $73,240 |
| Biweekly + $200/mo extra | 21 yrs, 10 mo | 8.2 years | $305,100 | $143,340 |
| Biweekly + $500/mo extra | 17 yrs, 8 mo | 12.3 years | $231,400 | $217,040 |
Adding just $500 per month on top of biweekly payments cuts a 30-year mortgage nearly in half and saves over $217,000 in interest.
Warning: Watch for Lender Fees
Some lenders and third-party services charge fees for biweekly payment programs:
- Setup fees: $200 to $400 one-time
- Per-payment fees: $2.50 to $7.50 per biweekly payment (that is $65 to $195 per year)
- Annual maintenance fees: $50 to $100
Over 25 years, a $5 per-payment fee costs $3,250 — eating into your savings. The DIY method costs nothing and achieves the same result. Only use a lender program if it is free.
When Biweekly Does Not Make Sense
Biweekly payments are not always the best use of your extra money. Consider these situations:
- You have credit card debt above 15% APR: Pay that off first. The guaranteed return on eliminating 20% interest debt far exceeds the savings from accelerating a 6.75% mortgage.
- You have no emergency fund: Build 3 to 6 months of expenses in savings before making extra mortgage payments. You cannot easily get that money back if you need it.
- Your mortgage rate is very low: If you locked in at 3% during 2020-2021, investing the extra money in index funds (historically 8-10% average returns) likely beats accelerating the mortgage.
- You are not maxing out retirement accounts: 401(k) employer matches and tax-advantaged growth in a Roth IRA generally provide better returns than prepaying a mortgage.
The priority order should be: high-interest debt, emergency fund, employer match, then mortgage acceleration.
Practical Takeaway
The simplest version: add 1/12 of your monthly payment as extra principal each month. No signup, no fees, same result as biweekly payments. Use our mortgage calculator to toggle biweekly payments on and see exactly how much time and money you save on your specific loan — combine it with extra payments to model the full impact.
Try it yourself
Run the numbers with our interactive calculator — drag a slider and watch the chart update instantly.
Open calculatorThis article is for educational purposes only and does not constitute financial advice. Consult a licensed financial advisor for decisions specific to your situation.