What is a Mortgage Payment?
A mortgage payment is the monthly amount you pay to your lender to repay your home loan. While the core of the payment is designed to pay down your principal and cover interest costs, most monthly payments also include additional costs like property taxes, homeowners insurance, and sometimes private mortgage insurance (PMI).
Understanding the components of your mortgage payment is essential for accurate budgeting and long-term financial planning. Our mortgage calculator breaks down these costs so you can see exactly where your money is going.
The 4 Components of a Mortgage (PITI)
Most lenders use an escrow account to collect monthly payments for taxes and insurance. This combined payment is often referred to as PITI:
- PPrincipalThe amount of money that goes directly toward paying off the remaining balance of your loan. In the early years of a mortgage, a smaller portion of your payment goes to principal.
- IInterestThe fee charged by the lender for borrowing the money. Interest is calculated based on your current loan balance and your annual percentage rate (APR).
- TTaxesReal estate or property taxes are assessed by your local government. Lenders typically collect 1/12th of your annual tax bill each month.
- IInsuranceThis includes homeowners insurance to protect your property and PMI if your down payment was less than 20%.
How Amortization Affects Your Wealth
Amortization is the schedule by which your loan is paid off. On a standard 30-year fixed-rate mortgage, your monthly payment remains the same, but the ratio of principal to interest shifts over time.
Early Years
Your payments are interest-heavy. You are primarily paying the bank for the privilege of borrowing. Equity builds slowly during the first 5-10 years.
Later Years
Your payments become principal-heavy. As the balance drops, interest charges decrease, and more of your money goes toward owning the home outright.
Frequently Asked Questions
How do I calculate my monthly mortgage payment?
Your monthly mortgage payment is calculated using the formula M = P[r(1+r)^n]/[(1+r)^n-1], where P is the loan principal, r is the monthly interest rate, and n is the number of payments. For a $300,000 loan at 7% over 30 years, the principal and interest payment is about $1,996/month.
What's included in a monthly mortgage payment?
A monthly mortgage payment typically includes four components (PITI): Principal (paying down the loan balance), Interest (the cost of borrowing), property Taxes (usually 1-2% of home value annually), and homeowner's Insurance. Some payments also include PMI (private mortgage insurance) if your down payment is less than 20%, and HOA fees.
How does mortgage amortization work?
Mortgage amortization is the process of paying off your loan over time through regular payments. Early payments are mostly interest, while later payments are mostly principal. For example, on a 30-year $300,000 loan at 7%, your first payment puts about $246 toward principal and $1,750 toward interest. By year 15, the split is roughly even.
Why is so much of my early payment interest?
Interest each month is the remaining balance times the monthly rate. On the default $320,000 loan at 6.85%, the first payment includes about $1,827 of interest and only about $270 of principal, and after 5 years only about $19,267 of the balance has been paid down.
Does the monthly total include PMI?
No. If your down payment is below 20% on a conventional loan, you will likely owe private mortgage insurance on top of the total shown. Ask your lender for the exact amount.
Mortgage Tips
- ✓20% Down Payment: Avoid the extra cost of Private Mortgage Insurance (PMI).
- ✓15-Year vs 30-Year: 15-year loans have lower interest rates and build equity twice as fast.
- ✓The 28/36 Rule: Aim to keep your mortgage payment under 28% of your gross monthly income.
Methodology by Frank Sterling (pen name of LifeCalc's founder). Not financial advice. Data last verified 2026-09-01.
How this calculator works
The principal-and-interest payment uses the standard fixed-rate amortization formula: M = L x r x (1+r)^n / ((1+r)^n - 1). L is the loan amount (price minus down payment), r is the annual rate divided by 12, and n is the term in months. If the rate is 0%, the payment is simply L / n.
The monthly total adds three more items: property tax (price x tax rate / 12), the homeowners insurance amount you enter, and any HOA dues. Total interest is the payment times the number of payments minus the original loan. The amortization schedule then walks month by month: each month interest is the current balance times the monthly rate, and the rest of the payment reduces principal. The yearly table and chart report the balance and cumulative principal paid at the end of each year.
Because interest is charged on a shrinking balance, early payments are mostly interest and later payments mostly principal. That is why extra principal in the first years cuts total interest more than the same extra payment made late in the loan.
Assumptions & defaults
- Price $400,000, down payment 20%, term 30 years, property tax 1.2% of price a year, insurance $150 a month, HOA $0.
- The default rate is 6.85%. When you first open the page, the calculator may replace it with a live average mortgage rate if one is available; a rate you type or a shared link takes priority. Check the rate field before you read the results.
- Fixed rate only. It does not model adjustable-rate loans, interest-only periods, points, PMI, escrow shortages, or extra payments.
- Property tax and insurance are held flat over the loan. In practice both usually change year to year.
Worked example
With the defaults (price $400,000, 20% down, 6.85%, 30 years), the calculator gives, rounded to the dollar:
| Down payment / loan amount | $80,000 / $320,000 |
|---|---|
| Principal and interest | $2,097 a month |
| Property tax ($400,000 x 1.2% / 12) | $400 a month |
| Insurance | $150 a month |
| Total monthly payment | $2,647 |
| Total paid on the loan over 30 years | $754,859 |
| Total interest | $434,859 |
| Balance after 5 years | $300,733 (principal paid $19,267, interest $106,543) |
Two comparisons from the same formula. First, the rate: on the same $320,000 loan, a 5.85% rate gives $1,888 a month and a 7.85% rate gives $2,315, a spread of about $427 a month for two percentage points. Second, the term: a 15-year loan at 6.85% has a payment of $2,849, about $752 more each month than the 30-year, but total interest falls from about $434,859 to about $192,907. The 15-year math only works if the higher payment fits comfortably in your budget.
Limitations: when to talk to a professional
This is an estimate, not a loan offer. Your actual payment depends on your credit profile, loan type (conventional, FHA, VA), points, lender fees and mortgage insurance if your down payment is under 20%. The Loan Estimate that a lender must give you within three business days of an application is the document to compare, not a calculator.
Property tax and insurance vary a lot by county and by home. Use the tax bill for the specific property and a real insurance quote rather than the 1.2% and $150 defaults, especially in areas with high insurance costs.
If you are choosing between loan types, deciding whether to pay points, or considering an adjustable-rate loan, talk to a licensed mortgage loan originator or a HUD-approved housing counselor. A fee-only financial planner can help you decide whether a shorter term or extra payments fit your wider goals.