I not claiming to be a expert but unless you have zero closing cost, refinancing to a lower repayment period or have a really big mortgage it is not worth refinancing for 1% drop in rate. What it will save you will be eaten up in closing cost. Just my opinion. I looked into it and did the math and I really did not save money refinancing into a 20 to 30 year mortgage. 15 years will save you money.