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15 year mortgage vs 30 year paid off in 15
Other people have belabored the point that you will get a better rate on a 15 year mortgage, typically around 1.25 % lower. The lower rate makes the 15 year mortgage financially wiser than paying a 30 year mortgage off in 15 years.  So go with the 15 year if your income is stable, you will never lose your job, your appliances never break, your vehicles never need major repairs, the pipes in your house never burst, you and your spouse never get sick, and you have no kids. Or if you do have kids, they happen to have good eyesight, straight teeth, they have no aspirations for college, don't play any expensive sports, and they will never ask for help paying the rent when they get older and move out.  But if any of those things are likely possibilities, the 30 year mortgage would give you some flexibility to cover short term cash shortages by reverting to your normal 30 year payment for a month or two. Now, the financially wise may balk at this because you are supposed to have enough cash in reserves to cover stuff like this, and that is good advice. But how many people struggle to maintain those reserves when they buy a new house?  Consider putting together spreadsheet and calculating the interest cost difference between the two strategies. How much more will the 30 year mortgage cost you in interest if you pay it off in 15 years? That amount equates to the cost of an insurance policy for dealing with an occasional cash shortage. Do you want to pay thousands in extra interest for that insurance? (it is pretty pricey insurance) One strategy would be to go with the 30 year now, make the extra principal payments to keep you on a 15 year schedule, see how life goes, and refinance to a 15 year mortgage after a couple years if everything goes well and your cash reserves are strong. Unfortunately, rates are likely to rise over the next couple years, which makes this strategy less attractive. If at all possible, go with the 15 year so you lock in these near historic low rates. Consider buying less house or dropping back to the 30 year if you are worried that your cash reserves won't be able to handle life's little surprises.