Estimate your monthly mortgage payment including taxes, insurance, and PMI. See the full cost breakdown over the life of your loan.
How Mortgage Payments Work
Your monthly mortgage payment is made up of several components, often abbreviated as PITI: Principal, Interest, Taxes, and Insurance. Understanding each piece helps you plan your budget accurately and avoid surprises after closing.
Principal & Interest (P&I)
The P&I portion of your payment is determined by the loan amount, interest rate, and term. In the early years, most of each payment goes toward interest. As the loan matures, a larger share goes to principal. This shift is called amortization, and it means your equity builds slowly at first, then accelerates.
Fixed-Rate vs Adjustable-Rate Mortgages
A fixed-rate mortgage locks your interest rate for the entire loan term, giving you predictable payments. An adjustable-rate mortgage (ARM) starts with a lower rate but adjusts periodically — usually after 5 or 7 years. ARMs can save money if you plan to sell or refinance before the adjustment period, but carry risk if rates rise.
PMI and How to Avoid It
Private Mortgage Insurance protects the lender when your down payment is under 20%. PMI typically adds 0.5-1% of the loan amount annually to your costs. You can avoid PMI by putting 20% down, using a piggyback loan (80/10/10), or choosing a lender-paid PMI option with a slightly higher rate.
Tip: Making just one extra payment per year on a 30-year mortgage can shave 4-5 years off your loan and save tens of thousands in interest.
How to Lower Your Mortgage Payment
- Increase your down payment to reduce the loan amount and eliminate PMI
- Choose a longer loan term (30 years vs 15 years) for lower monthly payments
- Shop multiple lenders — rates can vary by 0.5% or more
- Buy down your rate with points if you plan to stay long-term
- Refinance when interest rates drop by at least 0.75-1%
Frequently Asked Questions
How is a monthly mortgage payment calculated?
The principal and interest portion uses the standard amortization formula: M = P[r(1+r)^n]/[(1+r)^n-1], where P is the loan amount, r is the monthly interest rate, and n is the total number of payments. Property taxes, insurance, and PMI are added on top.
What is PMI and when do I have to pay it?
Private Mortgage Insurance (PMI) is required when your down payment is less than 20% of the home price. PMI typically costs 0.5% to 1% of the loan amount per year. It can be removed once you reach 20% equity in your home.
Should I choose a 15-year or 30-year mortgage?
A 15-year mortgage has higher monthly payments but a lower interest rate, and you pay far less total interest. A 30-year mortgage has lower monthly payments giving more flexibility. Choose 15-year if you can comfortably afford the higher payment.
What is included in my total monthly payment?
Your total monthly payment (PITI) includes Principal, Interest, property Taxes, and homeowners Insurance. If your down payment is under 20%, PMI is added as well. Some lenders also include HOA fees in escrow.
How can I lower my mortgage payment?
You can lower your payment by making a larger down payment, choosing a longer loan term, shopping for a lower interest rate, buying a less expensive home, or refinancing when rates drop. Eliminating PMI by reaching 20% equity also reduces your payment.