NO. Prepaids are a one-time fee collected at closing. They are to get a head start on your escrow account. Mortgage monthly payments typically have four components. PITI is an acronym. It stands for Principle, Interest, Taxes, and Insurance The first two, Principle and Mortgage Interest, do NOT change with a fixed-rate home loan. For example, with a 30-year fixed, the Principle and Interest go unchanged for 30 years. Taxes and Insurance are variable. They can go up and down over time. Because of this, it is possible for your monthly payment to change.