In one, the average loan is only 17 months old. The Real ARMs RaceFXstreet.com The Foreign Exchange Market, Spain -Mar 29, 2008They look at several mortgage-backed securities and slice into them. Already 20% of the loans are 90 days ... Having said that, the total expense of a refinance mortgage loan depends on all those factors - interest rate, number of points, and other costs. Lenders will charge several points in order to offer you the lowest rates. With these, the total cost can run between three and six percent of the total amount you borrow. So, for instance, you borrowed $100,000 on a refinance mortgage loan.