5% and a regard to thirty years. You're not really paying just 4. 5% of $200,000 as interest; you're paying interest on what remains of the balance after each payment monthly. Since your monthly payment is just a little fraction of the total amount 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 rate of interest modifications, however the parts of your mortgage payment that goes towards your principal and interest charges alters the longer you have the home loan. Interest payments are front-loaded early on and are slowly decreased until principal payments begin to surpass them.