5% and a regard to 30 years. You're not actually 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 regular monthly payment is just a little portion of the overall quantity you owe, just a small part of the loan balance earns money off, and interest gets charged again on that balance the next month.Your home mortgage payment is the very same each month unless your interest rate modifications, but the parts of your mortgage payment that approaches your principal and interest charges changes the longer you have the mortgage. Interest payments are front-loaded early on and are gradually minimized till primary payments start to exceed them.