BYTETOOLS

Biweekly Mortgage Calculator

Compare a biweekly mortgage against monthly payments to see how many years you cut off the term and how much interest you save, plus a year-by-year table.

$1,264.14
Monthly payment
$632.07
Biweekly payment
$58,747.85
Interest saved
5 yr 11 mo
Time saved

Side by side

PlanPaymentPayments madePayoffTotal interestTotal paid
Monthly$1,264.14360Aug 24, 2056$255,088.98$455,088.98
Biweekly$632.07628Sep 19, 2050$196,341.12$396,341.12

The biweekly plan clears the loan in about 24.1 years instead of 30.0.

Balance by year

YearMonthly balanceBiweekly balance
1$197,765$196,457
2$195,379$192,676
3$192,834$188,641
4$190,119$184,336
5$187,222$179,742
6$184,131$174,840
7$180,832$169,610
8$177,313$164,028
9$173,559$158,072
10$169,552$151,717
11$165,278$144,935
12$160,717$137,698
13$155,850$129,976
14$150,658$121,736
15$145,118$112,944
16$139,207$103,561
17$132,900$93,550
18$126,171$82,867
19$118,991$71,467
20$111,331$59,303
21$103,157$46,323
22$94,436$32,472
23$85,130$17,692
24$75,202$1,921
25$64,608$0
26$53,305$0
27$41,246$0
28$28,378$0
29$14,649$0
30$0$0

The biweekly schedule assumes each half-payment is applied on the day it is made, with interest accrued at the annual rate ÷ 26. Many lenders instead hold biweekly payments and apply them monthly, which produces slightly less saving. Escrow, taxes and insurance are excluded. Estimates only, not financial advice.

What is the Biweekly Mortgage Calculator?

The ByteTools Biweekly Mortgage Calculator amortises the same loan twice — once on a normal monthly schedule, and once with half that payment made every 14 days.

  • Amortises monthly and biweekly schedules from the same loan inputs
  • Shows payoff dates, total interest and total paid for both plans
  • Reports the years saved and the interest saved as headline numbers
  • Optional extra monthly principal split across the biweekly payments
  • Year-by-year balance comparison with CSV download
  • Runs entirely in your browser; estimates only, not advice

How to use the Biweekly Mortgage Calculator

  1. 1

    Pick your currency and enter the loan amount, interest rate and term in years.

  2. 2

    Optionally add an extra principal amount you would put in each month.

  3. 3

    Read the monthly payment, the biweekly half-payment, the interest saved and the time saved in the stat row.

  4. 4

    Check the side-by-side table for both payoff dates and total interest figures.

  5. 5

    Open the year-by-year balance table and download it as a CSV if you want to keep it.

About the Biweekly Mortgage Calculator

The ByteTools Biweekly Mortgage Calculator amortises the same loan twice — once on a normal monthly schedule, and once with half that payment made every 14 days. Because 26 half-payments a year equal 13 monthly payments, the biweekly plan quietly makes one extra payment every year, and this tool shows exactly what that is worth in years and in money.

Enter your loan amount, rate and term and you get both payoff dates side by side, the total interest each schedule costs, and how much time and interest the biweekly plan saves. You can also add an extra principal amount each month, which is split across the two half-payments, to model an even more aggressive payoff.

Everything is calculated locally in your browser — your loan figures are never uploaded or stored anywhere. The results are estimates for planning and are not financial advice.

Frequently asked questions

How much can biweekly mortgage payments save?

On a typical 30-year loan, paying half the monthly amount every two weeks usually shortens the term by roughly five to six years and saves tens of thousands in interest. The exact figure depends on your rate and balance, which is why this calculator runs both schedules on your own numbers rather than quoting a rule of thumb.

Why does biweekly pay off a mortgage faster?

There are 52 weeks in a year, so 26 biweekly payments of half your monthly amount add up to 13 full monthly payments instead of 12. That extra payment goes straight to principal, and paying down principal earlier means less interest accrues for the rest of the loan.

Do all lenders apply biweekly payments immediately?

No, and this matters. Some servicers apply each half-payment on the day it arrives, which is what this calculator models. Others hold the money and post it as one monthly payment, so you only get the benefit of the 13th payment. Ask your servicer which one they do before signing up.

Is a biweekly plan better than just paying extra each month?

They are almost identical in effect. Adding one twelfth of your payment to every monthly payment produces nearly the same payoff date as a true biweekly schedule, and you keep full control without a third-party program or its fees.

Should I pay a company to set up biweekly payments?

Usually not. Third-party biweekly services often charge setup and transaction fees for something you can do yourself by making an extra principal payment each month. Check whether your lender offers a free biweekly option first.

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