April 5, 2004, Revised November 17, 2004, June 29, 2007
Refinancing a mortgage at a higher interest rate may be necessary to
raise badly needed cash, or to reduce monthly payments you can no longer
afford, but it will make you poorer in the long-term. That includes
proposals to invest the savings in monthly payment, such as this one.
“I have a recently purchased home, with a $180,000 mortgage for 15 years
at 4.63%. My new investment advisor suggests refinancing into a new
30-year mortgage at 5.85% to 6%, and investing the difference in
payment. He says this will allow us to retire sooner. I am 61 and was
planning on retiring at 66. I understand his argument but I hate to give
up the ultra low 4.6% interest rate and the peace of mind of paying off
the house sooner.”
Your investment advisor is either an idiot or a scoundrel. He is a
scoundrel if the new loan he wants to put you into is one in which he
has a financial interest.
On a $180,000 loan, the monthly payment at 5.85% for 30-years is about
$327 less than at 4.63% for 15 years. Extending the term to 30 years
reduces the payment by more than the higher rate increases it. Your
investment advisor wants you to invest that $327, arguing that you will
be better off down the road if you do.
You will be better off if the investment fund you accumulate over time
becomes larger than the difference between the loan balance you will
have at that time, and the smaller balance you would have had if you
kept the lower-rate and shorter-term mortgage. For example, if you
accumulate $20,000 after 5 years and your loan balance is only $5,000
higher at that time than it would have been, you would be $15,000 ahead.
In fact, there is virtually no chance of your coming out ahead. Over
your time horizon of 5 years, you would have to earn more than 38% a
year to make this happen. If you are in the 27% tax bracket, you would
have to earn more than 24% after tax. If you hold to the strategy for 10
years, the required returns drop to 20% before-tax and 13% after-tax.
These returns are still far higher than any available on investments
your advisor can put you into.
I calculated these returns, as you can, from calculator 15a on my web
site,
Investing In a Shorter Term. The calculations ignore any refinancing
costs. These would make the proposed strategy look even worse.
I have yet to find a legitimate exception to the following rule:
"Refinancing into a higher-rate loan reduces your wealth." Read also
Can Mortgage
Refinance at a Higher Rate Make Sense?