Are Biweekly Mortgage Payments Worth It? The Math on a $320k Loan

Biweekly mortgage payments are often worth it, as long as you don't pay a fee to set them up. Paying half your payment every two weeks adds up to 13 full payments a year instead of 12. On a $320,000 loan at 7.32%, that one extra payment cuts about six and a half years and roughly $120,500 of interest. You can test your own loan with our mortgage calculator.

The catch is how you do it. You can get almost the same savings for free by adding a little to each monthly payment. Paid "biweekly programs" can quietly eat into the benefit.

Why biweekly payments add a 13th payment

A year has 52 weeks, so paying every two weeks means 26 payments. Twenty-six half-payments equal 13 full payments. With a monthly schedule, you make 12.

That 13th payment goes straight to principal. Less principal means less interest every month after that. The effect compounds over decades, which is why one extra payment a year matters so much.

There's no special trick in the timing itself. The savings come almost entirely from paying more each year.

The math on a $320,000 loan at 7.32%

Here's the example. You borrow $320,000 on a 30-year fixed loan at 7.32%, the average 30-year rate in Freddie Mac's survey for the week of October 22, 2026.

• Monthly principal and interest: $2,198.18
• One extra payment a year: $2,198.18 ÷ 12 = $183.18 more per month

We amortized the loan month by month, both with and without the extra $183.18. Here's what changes.

Payment plan	Monthly-equivalent payment	Payoff time	Total interest	Interest saved
Standard monthly	$2,198.18	30 years	$471,344	—
Monthly + 1/12 extra	$2,381.36	23 years, 6 months	$350,823	$120,521
True biweekly ($1,099.09 every 2 weeks)	$2,381.36	about 23.5 years	$349,726	$121,618
Monthly + $100 extra	$2,298.18	26 years	$395,332	$76,012

The 13-payment approach ends the loan 78 months early. You'd pay about $120,500 less interest over the life of the loan.

True biweekly saves slightly more, about $1,100 extra. That's because each half-payment lands two weeks sooner. Over 23 years, the difference is small.

Even $100 a month helps. It shaves four years off and saves about $76,000.

What it means if you sell early

Most people don't keep a mortgage for 30 years. The extra payments still build equity faster. After 10 years, your balance would be about $244,361 with the extra payment versus $276,632 without. That's roughly $32,300 more equity when you sell or refinance.

Watch out for paid biweekly programs

Some lenders and third-party companies sell biweekly payment plans. They draft half your payment every two weeks and send it to your servicer. Some charge a setup fee, a per-payment fee, or both.

Suppose a program charges a $395 enrollment fee plus $2.50 per draft. That's $65 a year in drafting fees, or $1,045 over the first 10 years. You'd be paying for something you can do yourself at no cost.

There's a second issue. Some programs don't send money to your servicer every two weeks. They collect it and forward it once a month, sometimes holding the extra until year-end. Your money sits with them instead of reducing your balance. The Consumer Financial Protection Bureau has taken action against companies that misrepresented the savings from these programs.

Before you sign up for any program, ask:

• Is there a setup fee or a per-payment fee?
• When exactly does each payment reach my servicer?
• Is the extra money applied to principal right away?

If the answers aren't clear, skip it.

Free ways to get the same result

You don't need a program. Here are three no-cost options.

1. Add one-twelfth to every payment. In our example, that's $183.18 extra each month, labeled as principal. This matches the biweekly result almost exactly.
2. Make one extra payment a year. Send an extra $2,198.18 once a year, perhaps from a tax refund or bonus. The savings are close, just a bit smaller because the money arrives later.
3. Ask your servicer about free biweekly drafting. Some servicers offer it at no charge. Confirm that each half-payment is credited when received.

Whichever you choose, mark the extra as a principal-only payment. Then check your next statement. The principal balance should drop by the extra amount.

When biweekly payments may not be worth it

Paying ahead isn't the best move for everyone. It may make sense to wait if:

• You don't have an emergency fund. Money in your house is hard to get back out quickly. Three to six months of essential expenses in savings often comes first.
• You carry high-interest debt. Credit cards near 22% APR cost far more than a 7.32% mortgage. Pay those first.
• You're missing a 401(k) match. An employer match is an instant return that prepaying can't beat.
• Your rate is low. If you locked in at 3%, extra cash may earn more in a high-yield savings account or investments. A 7.32% rate makes prepaying more attractive.
• Your loan has a prepayment penalty. Most modern mortgages don't, but read your note to be sure.

Paycheck timing matters too. If you're paid biweekly, a biweekly mortgage schedule can match your cash flow. If you're paid monthly or twice a month, the one-twelfth method fits better.

Biweekly payments vs. a 15-year mortgage

If you want to pay off your home much faster, a 15-year loan is another option. The average 15-year rate was 6.68% in late October 2026, lower than the 30-year rate.

On $320,000, a 15-year loan at 6.68% costs about $2,819.31 a month. Total interest is about $187,475, far less than either 30-year option.

The trade-off is flexibility. The higher payment is required every month, even in a tight year. With a 30-year loan plus extra payments, you can stop the extra anytime. Many borrowers prefer that safety valve, especially without a large emergency fund.

How to decide

Start with your actual loan. Enter your balance, rate and remaining term in our mortgage calculator, then add an extra monthly amount to see your new payoff date and interest saved.

If you're thinking about a new loan instead, compare the savings to a lower rate with our refinance break-even calculator. And if you're deciding between prepaying and investing, the compound interest calculator can show what that same $183 a month might grow to.

The bottom line: biweekly payments work because you pay more, not because of the calendar. Get the benefit for free, and you keep every dollar of the savings.