I paid off a 80,000 dollar loan in 7 years. If I would have paid min payments, the total would have been 192,000 at the end of 30 years. My end total was less than 100,000. You cannot lose by paying off your house as fast as possbile, especially the first half. Aquire a amoritization sheet from your lender and find out where your at. For example, my house payment was 792. This includes tax and insurance. the principle at first was about $19 and the interest was $495. If I add another 20 dollars to that months payment, I just saved $495 in the long run. If I add another $20 I skip 494, etc. I put every spare dollar to my house, it is the best investment i made. There is no penalty for paying off loans fast. you can write your interest off on your taxes, but it comes no where close to not paying 90% interest to the lender.