RefinancingSome homeowners in their 50s are taking advantage of historic low rates to refinance their homes and score themselves a mortgage-free retirement.

Mark and Jan Sass, 55-year-olds who live in Cincinnati, Ohio, refinanced their home last week to lock in lower rates, Reuters reported. They switched from a 20-year fixed-rate loan of 4.875%, with 12 years remaining, to 10-year mortgage with a 3.5% rate.

"The opportunity to look 10 years out and know that – unless things change – we won't have a mortgage when we retire looked like a smart decision," Sass told the news agency.

A Refi surge

They aren't alone. U.S. banks have seen a recent surge in loan applications that's almost entirely due to refinancing, Greg McBride, senior financial analyst at Bankrate.com, told DailyFinance.

Mortgage applications for the week of Aug. 5 rose more than 21% over the previous week and three quarters of those applications were for were for refinancing, according to the Mortgage Bankers Association, also known as MBA.

"Over the past month, refinance application volume has increased by 63%," Mike Fratantoni, MBA's vice president of research and economics, said in a statement. "Refinance applications for jumbo loans increased by almost 75% relative to last week. Despite these low mortgage rates, applications for home purchase have remained little changed through the summer."

According to a Bankrate.com survey released Thursday, the average 15-year fixed rate for a mortgage reset is 3.61%, while 30-year fixed-rate mortgages average out at slightly less than 4.5%. The jumbo 30-year fixed rate set a new record of 5.02%, the Bankrate.com survey found.

Should You Refi?

Search Millions of Home Listings
View photos of homes for sale and apartments for rent on AOL Real Estate
So with all the chatter about low interest rates, is refinancing right for you? To answer that question -- or to pick the right mortgage for a refinancing deal -- homeowners should consider their home equity, credit history, time horizon, age and cash flow.

For example, homeowners in their early 50s who have lived in their homes for a number of years and have positive cash flow have little reason to stretch out a longer-term loan, says McBride. Refinancing into a shorter-term now could put them on track to pay off their house by retirement time.

Alternatively, homeowners who are in their 30s and starting a family might be looking at refinancing into another 30-year loan as a way to create more breathing room in the monthly family budget and to enable them to sock more money away into retirement or college savings. Mortgage calculators can help homeowners determine where refinancing is a good option.

For a back-of-the-envelope calculation: Divide how much will it cost you by how much you will save. That will tell you break-even point. If it will save you the amount of your mortgage payments for the two- to three-year range, says McBride, then it's generally worthwhile to consider refinancing.

See more stories on refinancing at AOL Real Estate.

Increase your money and finance knowledge from home

Understanding Credit Scores

Credit scores matter -- learn how to improve your score.

View Course »

How much house can I afford

Home buying 101, evaluating one of your most important financial decisions.

View Course »