I am thinking about refinancing my mortgage from a 30yr loan 4.25% to a 15 year loan and 3%(or so). I am in the process of redoing the garage so I believe I will have a little more equity in the home (right now its about 10%). When I do the calcs it will save me about $55000 (or a newer GT500 ) in interest over the life of the loans. I was wondering what others thoughts were on this and if it is worth it before I go through the process. I have great credit (>780), steady job, I am only 26 and the only other debt I have besides the house is student loans (<$5000), her car payment, and a small loan I had to take out for the garage (~$6500, 0% for 12 months). I am an electrical engineer making a little over $50k a year but already have 160 hours of OT this year (paid time and a half for OT) and its not letting up anytime soon. Trying to do the right thing and save as much as I can!