Biweekly Mortgage Payment Calculator
See exactly how much interest and time you save by switching from monthly to biweekly mortgage payments.
Loan Details
$80,000
Monthly Payment
$2,023
12 payments/year
Biweekly Payment
$1,011
26 payments/year
Biweekly savings vs. monthly
Interest Saved
$93,073
Time Saved
5y 10m
Monthly vs. Biweekly Comparison
| Monthly | Biweekly | |
|---|---|---|
| Payment Amount | $2,023 | $1,011 |
| Payments per Year | 12 | 26 |
| Total Interest | $408,142 | $315,069 |
| Total Cost | $728,142 | $635,069 |
| Payoff Date | May 2056 | July 2050 |
| You Save | $93,073(5y 10m faster) |
Loan Amount
$320,000
Interest (Monthly)
$408,142
Interest (Biweekly)
$315,069
Amortization Schedule
| # | Date | Payment | Principal | Interest | Balance |
|---|---|---|---|---|---|
| 1 | Jun 2026 | $2,191 | $458 | $1,733 | $319,542 |
| 2 | Jul 2026 | $2,191 | $460 | $1,731 | $319,082 |
| 3 | Aug 2026 | $2,191 | $463 | $1,728 | $318,619 |
| 4 | Sep 2026 | $2,191 | $465 | $1,726 | $318,154 |
| 5 | Oct 2026 | $2,191 | $468 | $1,723 | $317,686 |
| 6 | Nov 2026 | $2,191 | $470 | $1,721 | $317,216 |
| 7 | Dec 2026 | $2,191 | $473 | $1,718 | $316,743 |
| 8 | Jan 2027 | $2,191 | $475 | $1,716 | $316,267 |
| 9 | Mar 2027 | $2,191 | $478 | $1,713 | $315,789 |
| 10 | Mar 2027 | $2,191 | $481 | $1,711 | $315,308 |
| 11 | Apr 2027 | $2,191 | $483 | $1,708 | $314,825 |
| 12 | May 2027 | $2,191 | $486 | $1,705 | $314,339 |
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Sign in →How Biweekly Payments Work
The core idea is simple: instead of making 12 monthly payments per year, you make 26 half-payments every two weeks. Since 26 × (monthly payment ÷ 2) = 13 monthly payments, you are effectively making one extra full payment per year — without it feeling that way.
Why it saves so much: that extra annual payment goes directly toward principal. A smaller principal balance means less interest accrues every single month afterward. Over a 30-year mortgage, that compounding effect can eliminate 4–5 years of payments and tens of thousands in interest.
How to set it up: some lenders offer a formal biweekly payment plan, though some charge a setup fee. The simpler approach: divide your monthly P&I payment by 12 and add that amount to each monthly payment as extra principal. The math is identical and most lenders accept it at no cost.
Important: always confirm with your lender that extra payments are applied directly to principal — not held and credited toward next month's payment. If the lender holds biweekly payments until they equal a full monthly payment, you lose most of the interest-saving benefit.