5% and a term of 30 years. You're not in fact paying just 4. 5% of $200,000 as interest; you're paying interest on what stays of the balance after each payment each month. Because your monthly payment is just a small portion of the overall quantity you owe, only a tiny part of the loan balance gets paid off, and interest gets charged again on that balance the next month.Your home mortgage payment is the very same monthly unless your rates of interest changes, however the parts of your home loan 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 decreased until primary payments start to exceed them.