How the Mortgage Payment Calculator Works

It estimates your full monthly housing cost — principal, interest, property taxes, and homeowners insurance (PITI) — from a home price, down payment, rate, and term.

How It Works, Step by Step

The tool first subtracts your down payment from the price to get the loan amount, then runs that loan amount through the standard amortizing-payment formula to find principal and interest. It estimates monthly taxes and insurance as a yearly percentage of the price divided by twelve and adds everything together.

Florida property tax averages roughly 0.8% to 1.1% of assessed value depending on the county, and the homestead exemption can shave $50,000 off the taxable value of a primary home. Homeowners insurance runs higher here than the national average, especially near the coast, so the insurance line in this calculator matters more in Florida than almost anywhere else.

Want the underlying math? See the mortgage payment formula page, or open the calculator to try it with your own figures.