How to Use a Mortgage Calculator
A mortgage calculator helps you estimate your monthly payment before you talk to a lender. Understanding the inputs helps you get a realistic number — not just a rough guess.
The four parts of your payment (PITI)
Your monthly payment is made up of Principal (the amount you borrow), Interest (the cost of borrowing), Taxes (property taxes), and Insurance (homeowners insurance, and mortgage insurance if applicable). A good calculator includes all four, not just principal and interest.
Inputs that change your payment
Home price, down payment, interest rate, loan term (e.g., 30 vs. 15 years), property taxes, and insurance all affect your payment. A longer term lowers your monthly payment but increases total interest paid over time. A larger down payment reduces your loan amount and may eliminate mortgage insurance.
Comparing loan types
Different loan types produce different payments. FHA loans include mortgage insurance premiums, conventional loans may have PMI that can be canceled, and VA loans avoid PMI entirely. Use the calculator to compare side by side so you can see how each program fits your budget.
From estimate to pre-qualification
A calculator is a planning tool, not a quote. Your actual payment depends on your verified credit, income, the property, and the rate you lock. Once you have a rough number, get pre-qualified to receive a personalized estimate based on your full financial picture.
Frequently Asked Questions
Is the mortgage calculator's payment accurate?
It's a close estimate based on the inputs you provide. Your actual payment depends on the rate you qualify for, the property's taxes and insurance, and mortgage insurance. Pre-qualification gives you a precise, personalized figure.
Does the calculator include property taxes and insurance?
Our calculator includes principal, interest, taxes, and insurance so you get a realistic estimate of your full monthly payment, not just the loan portion.
Ready to take the next step?
Get pre-qualified with Marcus Cavazos — no obligation, personalized to your situation.