5% and a regard to 30 years. You're not really paying just 4. 5% of $200,000 as interest; you're paying interest on what stays of the balance after each payment each month. Due to the fact that your regular monthly payment is just a little portion of the total amount you owe, only a tiny part of the loan balance earns money off, and interest gets charged again on that balance the next month.Your mortgage payment is the exact same monthly unless your rate of interest modifications, however the parts of your mortgage payment that approaches your principal and interest charges alters the longer you have the mortgage. Interest payments are front-loaded early on and are gradually reduced up until principal payments begin to exceed them.