Mortgage & Home · Guide
How Mortgage Payments Work: Principal, Interest, Taxes & Insurance
A mortgage payment is not just one number — it is four costs bundled together: principal, interest, property taxes and insurance. Understanding how these parts work, and especially how amortization shifts the balance between principal and interest over time, is the key to paying off your home faster and saving thousands in interest.
In this guide
The four parts of a mortgage payment
Principal is the amount you borrowed and are repaying. Interest is the fee the lender charges for the money. Property taxes and homeowners insurance are often collected in an escrow account and paid by the lender on your behalf, so the payment covers them too.
How amortization works
With a fixed-rate mortgage, the total payment stays the same each month, but the split changes. Early on, most of each payment goes to interest because the balance is large. As you pay down principal, the interest share shrinks and more of your payment goes to principal. That is why equity builds slowly at first and faster later.
How extra payments help
An extra payment goes straight to principal, skipping future interest on that amount. Because the balance drops faster, you both shorten the loan and reduce total interest. One extra payment per year can shave years off a 30-year term.
Key takeaways
- A mortgage payment = principal + interest + taxes + insurance.
- Early payments are mostly interest; later payments are mostly principal.
- Extra payments directly cut principal and save large amounts of interest.
- Use a mortgage calculator to see the full amortization before you choose a term.
Frequently asked questions
What does PITI stand for?
PITI stands for Principal, Interest, Taxes and Insurance — the four components of a full mortgage payment.
Should I choose a 15-year or 30-year mortgage?
A 15-year term has a much higher payment but dramatically less total interest. Choose based on whether you can comfortably afford the higher payment while keeping your emergency fund intact.
How much will I save with extra payments?
It depends on your rate, balance and how much extra you pay. Use the Mortgage Payoff Calculator to see the new payoff date and total interest saved for any extra amount.
Put these numbers to work
Mortgage calculators help you understand what a home actually costs before you commit. Compare monthly principal and interest payments, estimate how extra payments shorten your loan and reduce total interest, see what price range you can afford, and check whether refinancing is worth the closing costs. Run the numbers with different rates, terms and down payments to make an informed decision.
Mortgage Calculator
Estimate your monthly payment, interest and full amortization.
Mortgage Payoff Calculator
How long until your mortgage is paid off — and what an extra payment does.
Home Affordability Calculator
How much house can you afford based on your income and debts?
Refinance Calculator
Compare your current loan against a new rate and term.