Property Taxes When You Buy a Home: What to Expect

Property tax is one of the largest and least predictable parts of owning a home. It differs by state, county, city and even school district, and it can change after you buy. Estimating it well makes your budget far more realistic.

How property tax is calculated

In most places the tax is the assessed value of the property multiplied by the tax rate. The assessed value comes from the local assessor and may be lower than the market value. The rate is the combined total of the taxing districts that cover your address, such as the county, city, school district and special districts. Some areas express the rate in “mills,” where one mill is one-tenth of a cent per dollar of assessed value.

Effective rate: the number that helps you compare

Because assessment practices and nominal rates differ, a more useful measure is the effective rate: the tax actually paid divided by the home’s value. Using U.S. Census Bureau American Community Survey estimates (2020 to 2024 5-year), the median effective rate for homeowners with a mortgage is about 1.05% nationwide. By state it ranges from roughly 0.27% in Hawaii to 2.22% in Illinois.

On a $400,000 home, 1.05% is about $4,200 a year ($350 a month), while 2.2% is about $8,800 a year ($733 a month). That difference alone can change how much house a given income supports. Browse the property tax rate for every state, or open a state or county calculator page for local figures.

Your bill may differ from the seller’s

Do not assume you will pay what the seller pays. Many areas reassess a property when it sells, so the new assessment may rise to match the price. Others limit how much the assessed value can rise each year, which means long-time owners pay less than new buyers on similar homes. For example, California generally sets the base value at the purchase price and limits yearly increases to 2%, and Texas limits increases in appraised value for homesteads to 10% a year. Rules differ widely, so check the specific county.

How to estimate your tax

1. Find the property’s current tax bill on the county assessor or treasurer website.
2. Ask how the county reassesses after a sale, and what the tax would be at the purchase price.
3. Add the district rates and apply them to the likely assessed value.
4. Check for exemptions you might qualify for, such as homestead, senior or veteran exemptions, which are not automatic.

If you cannot get a precise estimate, use the effective rate for the county. In the mortgage calculator, entering a ZIP code fills in the county’s median effective rate, which you can override.

Paying the tax

Most lenders collect property tax monthly through an escrow account and pay the bills for you. If you pay yourself, tax bills usually come once or twice a year, so set money aside each month.

If you think the assessment is too high

You can usually appeal. Compare your assessed value with recent sales of similar homes, and check the assessor’s description of your property for errors such as square footage or condition. Appeals have deadlines, often soon after assessment notices go out, so act promptly.

Takeaways

• Compare homes by estimated monthly cost, including tax, not only by price.
• The effective rate in a county is a better guide than a headline rate.
• Budget for a possible reassessment after you buy.
• Ask about exemptions and file for those you qualify for.

Common questions

Why do two similar homes have very different tax bills?

Differences in assessed value, taxing districts and exemptions all matter. A neighbor who has owned for years may have an assessment held down by a cap, while your assessment may reflect your recent purchase price. School district and local bond levies add to the rate in some areas.

Is property tax deductible?

State and local taxes, including property tax, may be deductible if you itemize, subject to a cap on the total deduction. Because many households take the standard deduction, the benefit varies. Check current IRS rules or ask a tax professional.

What if I cannot pay my property tax?

Unpaid property tax can lead to penalties, interest and eventually a lien or sale of the property. If you are struggling, contact the county tax office early, because many offer payment plans, and look for hardship or senior deferral programs where you live.

Key takeaways

• Compare homes by estimated monthly cost including tax, not only by price.
• Use the county’s effective rate as a guide and budget for reassessment.
• Ask about exemptions and appeal an assessment you believe is too high.