The following is a guest post from reader TFB, who blogs anonymously at The Finance Buff where he covers investing, taxes, banking, mortgage, insurance, and other personal finance related topics. You can find more of his posts about mortgage refinances under the “refi” tag.
I refinanced my mortgage recently. The rate on my 15-year loan went down from 4.25% to 3.75%. With a lender credit covering the bulk of my closing cost, I spent about $200 on a refinance that will save me over $1,000 interest every year.
Some people don’t like to refinance their mortgage even when the rate is lower and there’s no fee, because they fear it’s going to reset the clock for the eventual payoff. They reason that when they refinance to a new loan, the payoff date will be extended, and they will end up paying more interest over the life of the loan than they would if they didn’t refinance.
In some cases it’s true. For example, if you are five years into a 30-year mortgage at 5.25% with $200k principal balance remaining, keeping the current loan at 5.25% for another 25 years will cost you additional $159,384 in interest. Refinancing the $200k principal balance into a new 30-year loan at 4.5% will push out the payoff date by five years and cost you $164,813 in interest in 30 years. By refinancing, you end up paying more interest.
It doesn’t have to be that way.
The reason you will pay more interest over the life of the new loan is because you are paying less toward principal in the new loan. Under the old loan at 5.25%, you pay $1,199 a month. Under the new loan at 4.5%, you only pay $1,013 a month. In the first month after refinancing, although the interest is lower by $125, you will also pay $61 less toward principal.
Principal (first month after refinance) Interest (first month after refinance)
There are several ways to deal with this problem.
1. Refinance to a Shorter Term
If you refinance to a 20-year loan at 4.25% instead of a 30-year loan at 4.5%, the loan will be paid off sooner (in 20 years instead of 25 years). The monthly payment is only slightly higher. You will pay $1,238 a month instead of $1,199 a month. Paying $39 a month more will save you more than $60k over the life of your loan.
Here you are pushing 100% of the interest savings plus a small extra amount per month toward paying down the mortgage. That’s why it will be paid off faster.
2. Make the Same Payment
What if you can’t or don’t want to pay extra $39 a month? You can still refinance to a new 30-year loan, but make the same monthly payment as before. Because the interest rate on the new loan is lower, more from the same monthly payment goes toward principal. The new loan will be paid off in 22 years instead of 25 years.
With no change in your monthly cash flow, you are able to save a substantial amount of interest by refinancing.
3. Catch Up on Principal
You see in the previous example you will be able pay off the loan in 22 years instead of 25 years if you keep making the same payment as before. If you’d like to maintain the original 25 years target, you can pay less than what you paid before but more than the required monthly payment on your new loan.
How do you know how much extra to add to the required monthly payment? You use the PMT function in Excel. The monthly payment to pay off $200,000 in 25 years at 4.5% interest rate is $1,112:
=-PMT(4.5%/12, 25*12, 200000)
The extra payment required to pay off your new loan in 25 years is $1,112 – $1,013 = $99.
If you are concerned the bank won’t credit your extra principal payment correctly if you just include it with your mortgage payment, you can make a special principal payment once a year, with a paper payment coupon if necessary. In our example it will be $99 * 12 = $1,188.
I made a spreadsheet for these calculations. Plug in your own numbers and see how they come out. Don’t let the fear for resetting the clock stop you from refinancing to a lower rate.
Find more in Real Estate | 10/13/10, 5:00am | Trackback