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Dr. Don Taylor, CFA, Bankrate.com advice columnistNo need for biweekly mortgage

Dear Dr. Don,
Do biweekly mortgage payments save more money than just paying an extra payment each year? I realize that going the biweekly route I would be paying 26 half payments vs. 12 full payments. Thanks, -- Annetta Amortization

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Dear Annetta,
What brings down the interest expense and the life of the loan isn't the biweekly aspect of the mortgage but the impact of making the dollar equivalent of 13 mortgage payments a year instead of 12. Here's a comparison of a $100,000 mortgage at 6 percent.

I used Bankrate's mortgage calculator to find the total interest expense for the monthly mortgage payment and the monthly mortgage plus additional principal payment examples, and Bankrate's biweekly mortgage comparison calculator to solve for the total interest expense for the biweekly mortgage.

Mortgage comparison
 MonthlyMonthly + extra 1/12th paymentBiweekly
Loan amount:
Interest rate:
Number of payments:
Loan payoff (years):
Loan payment:
Additional principal payment:
Total interest:
Difference in interest expense:

 

There's a host of biweekly mortgage calculators available on the Web, and they won't all give you the same answer because of the assumptions made in constructing the calculator. Bankrate's showed the highest savings of any calculator I used. If you're taking an existing mortgage and paying a financial services firm to restructure it into a biweekly mortgage, you'll lose some of the interest savings and are likely to pay some additional fees and expenses.

I'm not a big fan of biweekly mortgages. You can capture similar savings by making additional principal payments on your own. In my example, tacking on 1/12th of a payment as additional principal when you make your monthly payment captures 96 percent of the cost savings from a true biweekly mortgage. The reasons to convert to biweekly aren't very compelling. It also reduces your financial flexibility by making the additional payments contractual vs. optional. There's no compelling reason to convert your existing mortgage to a biweekly mortgage.

To ask a question of Dr. Don, go to the "Ask the Experts" page, and select one of these topics: "Financing a home," "Saving & investing" or "Money."

Bankrate.com's corrections policy-- Updated: July 28, 2006
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