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system
sanity check on choosing the term for a mortgage refinance
user
one thing you didn't mention is whether the 401(k) offers a match. if it does, this is a slam-dunk. the $303 ($303, right?) is $3636/yr that will be doubled on deposit. it's typical for the first 5% of one's salary to capture the match, so this is right there.  in 15 years, you'll still owe $76,519. but 15 * $7272 is $109,080 in your 401(k) even without taking any growth into account. the likely value of that 401(k) is closer to $210k, using 8% over that 15 years, (at 6%, it drops to 'only' $176k, but as i stated, the value of the match is so great that i'd jump right on that.) if you don't get a match of any kind, i need to edit / completely rip my answer. it morphs into whether you feel that 15 years (really 30) the market will exceed the 4% cost of that money. odds are, it will. the worst 15 year period this past century 2000-2014 still had a cagr of 4.2%.
assistant