This was/is one of my favorite topics. I have appreciated those who have continued to pound into our heads the math reasons why it doesn't make any sense to prepay 99.9% of the time. This thread helped me change my mind on my own mortgage strategy and for that I am forever grateful.
Now I'm asking for some advice (and a little bit of a case study) as I go down the refi road. I think I know the right answers, but I want to pound it into my own head one more time :) Here are the specifics of my situation:
Current mortgage balance - $152,500 (everything will be round numbers for simplicity). Current mortgage rate = 4.375% on a 30 year fixed rate note. Taxes and insurance escrowed at $219/month. Currently paying PMI of $45/month. I believe the house was appraised at $169,000 at time of purchase. So total payment is $778 (PI) + $219 (TI) + $45 (PMI) = $1,042/mo.
I've received refi quotes of 3.375% (roughly 3.475% APR) for 15 years & 3.625% (roughly 3.75% APR) for 30 years.
All in closing costs would be $1,900 - $2,000 which includes a few small credits/discounts from the bank. A house in our cul de sac that is 100% identical to ours (same floor plan and even interior finishes) sold for $189,000 a month or so ago, so I feel safe assuming our appraisal will come back around $185,000 or slightly higher. If that is the case, I plan on eliminating our PMI and refinancing at $148,000. So my total out of pocket will be the $4,500 (difference between $152,500 and $148,000) + $2,000 in closing costs = $6,500.
My all in monthly payment (PITI) on the 30 year note would come to $893/month roughly.
My all in monthly payment (PITI) on the 15 year note would come to $1,248/month roughly.
I would agree with the theme of this thread that I should take the $355/month difference between the two and invest it in the stock market, but I actually plan on retiring in around 15 years and the substantial reduction in cash outflow by not having a mortgage payment would be a huge relief. Also - if I take the $355 and invest in a taxable account (all pre-tax space is already maxed out), I am nervous of the potential income consequences as I heavily rely on showing limited income on my tax return for health insurance purposes. HI is such a ticking time bomb that I don't want to place all my bets on the ACA though.
Basically I understand that investing the $355/month provides much more flexibility and potential for the market to eclipse 3.75%, but knowing the mortgage would be retired in 15 years feels more"safe" for some reason.
Also - I don't itemize my deductions and probably never will, so any potential tax benefit doesn't apply to my situation.
I'm leaning toward the 30 year refi, but emotionally I want to go with the 15 year refi.
Now help me make the best decision :)