The four parts of a typical monthly mortgage payment

Your monthly house payment is usually made up of four separate costs bundled into one number: principal, interest, property taxes, and homeowners insurance. Lenders call this PITI. The principal and interest portions go to the lender who loaned you the money. The property tax and insurance portions go into an escrow account—a holding account the lender controls—and are paid out to the taxing authority and insurance company on your behalf.

The size of each piece depends on your loan amount, interest rate, local tax rates, and the insurance your home requires. A $300,000 house in one county will have a different monthly payment than the same house in another county, even with the same loan terms, because property tax rates vary by location.

If you put down less than 20 percent when you bought the house, your payment also includes PMI (private mortgage insurance), which protects the lender if you stop paying. PMI typically disappears once you have paid down the loan enough that you own at least 20 percent of the home's value.

Key Takeaways

  • A monthly mortgage payment includes principal, interest, property taxes, and homeowners insurance—often abbreviated as PITI.
  • Principal and interest are fixed for the life of the loan (on a fixed-rate mortgage), but property taxes and insurance can change year to year.
  • Property tax rates vary dramatically by location, so two identical houses in different counties will have different monthly payments.
  • If you put down less than 20 percent, your payment includes PMI until you own at least 20 percent of the home's value.
  • Your lender collects taxes and insurance through escrow, meaning you pay them monthly even though they are paid out once or twice a year.

How principal and interest are calculated

Principal is the amount you borrowed. Interest is what the lender charges you for lending it. On a fixed-rate mortgage, both amounts are locked in when you sign the loan documents, and they stay the same for the entire loan term—typically 15, 20, or 30 years.

The monthly payment is calculated so that by the end of the loan term, you will have paid back all the principal plus all the interest owed. In the early years of the loan, most of your payment goes toward interest. As time passes, more of each payment goes toward principal. This is why paying extra toward principal early in the loan can save you thousands in interest over time.

A $300,000 loan at 6.5 percent interest over 30 years results in a different monthly principal-and-interest payment than the same loan at 5.5 percent or 7.5 percent. A one-percentage-point difference in interest rate can change your monthly payment by $150 to $200 or more, depending on the loan size.

Property taxes and how they affect your payment

Property taxes are set by your county or municipality and are based on the assessed value of your home. The tax rate varies widely by location—some counties charge less than 0.5 percent of home value per year, while others charge over 2 percent. A home worth $400,000 in a low-tax area might have an annual property tax bill of $2,000, while the same home in a high-tax area could owe $8,000 or more per year.

Your lender collects one-twelfth of your annual property tax bill each month and holds it in escrow. When the tax bill is due—usually once or twice a year—the lender pays it from that account. If your home's assessed value increases, your property taxes go up, and so does your monthly payment. If your county reassesses homes and your assessment drops, your payment goes down.

You can usually find your property tax rate and your home's assessed value on your county assessor's website. Knowing this number before you buy helps you understand what your true monthly cost will be.

Homeowners insurance and escrow

Homeowners insurance protects your home and belongings against fire, theft, weather damage, and liability. Your lender requires you to carry it as a condition of the loan. The cost depends on the home's age, location, construction type, and the coverage limits you choose. A newer home in a low-crime area with standard coverage might cost $1,000 to $1,500 per year, while an older home in a high-risk area could cost $2,500 or more.

Like property taxes, your lender collects one-twelfth of your annual insurance premium each month and holds it in escrow. When your insurance bill is due, the lender pays it. If you change insurance companies or your premium increases at renewal, your monthly payment changes to reflect the new amount.

You have the right to shop for insurance and change companies whenever you want. If you find a cheaper policy, notify your lender and provide proof of the new premium. The lender will adjust your monthly escrow payment downward.

How loan term affects your monthly payment

A 30-year mortgage spreads the principal and interest over 360 monthly payments, making each payment smaller than a 15-year mortgage on the same loan amount. A 15-year mortgage has higher monthly payments but you pay off the house faster and pay less total interest over the life of the loan.

For example, a $300,000 loan at 6.5 percent interest costs roughly $1,896 per month over 30 years, or roughly $2,316 per month over 15 years. The 15-year option costs about $420 more per month, but you pay the house off 15 years sooner and pay roughly $150,000 less in total interest.

Some borrowers choose a 20-year term as a middle ground. The choice depends on your income, how long you plan to stay in the home, and whether you have other financial priorities.

What changes your payment and what does not

On a fixed-rate mortgage, your principal and interest payment never changes. Property taxes and insurance can change, and when they do, your total monthly payment changes. If your county raises property tax rates or your insurance premium increases at renewal, your lender adjusts your escrow payment upward. If taxes or insurance costs drop, your payment goes down.

If you have an adjustable-rate mortgage (ARM), the interest rate itself can change after an initial fixed period, which means your principal-and-interest payment can increase or decrease. ARMs are less common in today's market but still exist. If you have one, your loan documents spell out when and how often the rate can adjust.

Your payment does not change if you refinance your mortgage—refinancing means taking out a new loan to pay off the old one, which creates a new payment based on the new loan terms. Your payment also does not change if you pay extra toward principal, though paying extra does reduce the total interest you owe and shortens the loan term.

Estimating your own monthly payment

To estimate what your monthly payment might be, you need four numbers: the loan amount, the interest rate, the property tax rate in your area, and the estimated annual insurance cost. Many mortgage lenders and financial websites have calculators where you enter these numbers and get an estimate of your monthly PITI payment.

Start with your county assessor's website to find the property tax rate. Call insurance companies for quotes on the specific home you are considering. Ask your lender or mortgage broker for the interest rate you may have access to for. Then use a calculator to see what the total payment would be.

Remember that this is an estimate. Your actual payment may be slightly different once the lender orders an appraisal and the insurance company inspects the home. But the estimate gives you a realistic picture of what to expect each month.

Frequently Asked Questions

Can my monthly payment go down if my home value increases?

Your principal and interest payment stays the same. However, if your home value increases and your county reassesses it for tax purposes, your property tax bill could increase, which would raise your monthly payment. Higher home value does not automatically lower your payment.

What happens to my payment if I pay extra toward principal?

Your regular monthly payment stays the same. Paying extra toward principal reduces the amount you still owe and the total interest you will pay over the life of the loan, but it does not change the required monthly payment amount. You can pay extra whenever you want without penalty on most mortgages.

Why is my monthly payment different from what the lender quoted me?

The quote usually includes only principal and interest. Your actual payment includes property taxes and insurance as well. Once the lender orders an appraisal and gets an insurance quote for the specific home, the escrow portion may be higher or lower than estimated, changing your total monthly payment.

Does my monthly payment include HOA fees or condo fees?

No. Homeowners association fees and condo fees are separate from your mortgage payment and are paid directly to the association or management company. Your lender does not collect these through escrow. You are responsible for paying them on time each month.

What is the difference between a fixed-rate and adjustable-rate mortgage payment?

On a fixed-rate mortgage, your principal and interest payment never changes. On an adjustable-rate mortgage, the interest rate can change after an initial period, which means your payment can go up or down. ARMs typically start with a lower rate than fixed mortgages, but the rate adjusts periodically based on market conditions.