refinance

# Refinance or just pay down my mortgage?

Dear Dr. Don,
How can I find out whether I would save money by either making additional principal payments each year or refinancing my mortgage? I owe \$167,000 and have about 25 years left on a loan with an interest rate of slightly less than 5 percent. I could likely lock in at less than 3 percent on a 15-year fixed-rate mortgage. At the same time, I can make additional principal payments each year on my current 30-year loan. Can you help me decide?

Thanks,
-- Julie Jump-Start

Dear Julie,
The first step for you is to estimate how long you plan to remain in the house. If you think you could be moving in a few years, it isn't a good idea to pay thousands of dollars in closing costs just to lock in that lower interest rate.

Bankrate's refinancing calculators can tell us how long it takes to break even on refinancing. This estimate looks at how long it takes to recoup closing costs through lower monthly mortgage payments.

Making additional principal payments will reduce your total interest expense, but you will be stuck with the higher interest rate. If you do refinance, you would get a lower rate of interest, and you could make additional principal payments.

The chart below, while only estimating your situation, shows how you could make additional principal payments on your current loan equal to the difference in payments between the existing loan and a new 15-year loan at 2.95 percent interest, and you would still pay \$48,533 in interest expenses versus a new 15-year refinancing. Another benefit is refinancing also shortens your loan term by 3 ½ years.

Current loan w/additional principal payments15-year refinancingDifference
Loan amount\$167,000\$167,000
Interest rate4.95%2.95%2%
Loan term (months)22218042
Payment\$971.41\$1,149.26\$(177.85)
Total monthly payment\$1,149.26\$1,149.26\$-
Total payments\$255,400.16\$206,866.74\$48,533.42
Total interest expense\$88,400.16\$39,866.74\$48,533.42

This analysis doesn't include closing costs from a refinancing or the potential reduction of the mortgage interest deduction on your income taxes. Even so, it's clear refinancing is a better option than making additional principal payments on your existing loan if you plan to be in your home for a long time.

Get more news, money-saving tips and expert advice by signing up for a free Bankrate newsletter.

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." Read more Dr. Don columns for additional personal finance advice.

Bankrate's content, including the guidance of its advice-and-expert columns and this website, is intended only to assist you with financial decisions. The content is broad in scope and does not consider your personal financial situation. Bankrate recommends that you seek the advice of advisers who are fully aware of your individual circumstances before making any final decisions or implementing any financial strategy. Please remember that your use of this website is governed by Bankrate's Terms of Use.