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Property tax guide

How property taxes work in the United States.

Property taxes are the primary revenue source for most local governments — funding public schools, fire departments, road maintenance, and other municipal services. Unlike income or sales taxes, property taxes are levied annually on the assessed value of real estate you own, whether or not you have a mortgage. Understanding how they are calculated helps you budget accurately and evaluate the true cost of homeownership.

How property tax is calculated

Your annual property tax bill is determined by two factors:

• Assessed value: The value your local tax assessor assigns to your property. This may be the full market value, or it may be a fraction of it (the assessment ratio). Many states cap how much assessed value can increase each year, which is why long-time owners sometimes pay far less than recent buyers of comparable homes.
• Millage rate (mill rate): The tax rate expressed as dollars of tax per $1,000 of assessed value. A rate of 10 mills means $10 per $1,000 of assessed value, or 1%. Multiple overlapping taxing entities — county, city, school district, special districts — each levy their own mill rates, and your total rate is the sum of all of them.

The effective property tax rate (taxes paid divided by market value) is the most useful single-number comparison across states, because it factors in both the nominal mill rate and the assessment ratio. This calculator uses each state’s effective rate.

Why rates vary so much by state

New Jersey’s effective rate (about 2.2%) is roughly eight times Hawaii’s (about 0.27%), even though home prices in Hawaii are much higher. The divergence stems from each state’s reliance on property taxes relative to other revenue sources:

• States with no income tax (Texas, Nevada, Washington) tend to have higher property tax rates because local governments must rely more heavily on real estate revenue.
• States with broad income and sales taxes(California, Hawaii) can afford lower property tax rates.
• Homestead exemptions reduce taxable value for primary residences and are a significant factor in low-rate states like Alabama and South Carolina.
• Assessment limitations (Proposition 13 in California, "Save Our Homes" in Florida) keep assessed values well below market, artificially lowering effective rates for long-time owners.

Why rates vary by county within a state

State averages mask enormous county-level variation. In Illinois, the average effective rate is about 2.1%, but Cook County (Chicago) is significantly higher than rural downstate counties. In Texas, the statewide average is around 1.6%, yet counties in the Dallas–Fort Worth or Houston metro can exceed 2.5%, while rural West Texas counties may be under 1%.

The primary driver of county variation is school funding. Public schools in most states are financed primarily through local property taxes, so wealthier districts with higher home values often have lower rates — and vice versa in lower-value areas that need higher rates to generate the same dollar amount per pupil.

Common exemptions that reduce your bill

• Homestead exemption: Available in most states for primary residences; reduces the taxable assessed value by a fixed dollar amount or percentage.
• Senior citizen exemption: Many counties offer reduced rates or frozen assessed values for homeowners over 65.
• Veteran’s exemption: Partial or full exemptions for disabled veterans in many states.
• Agricultural exemption: Land assessed at its current-use (agricultural) value rather than development value.
• Circuit breaker: Some states cap property taxes as a percentage of income, providing relief for low-income owners.

Applying for exemptions you qualify for can meaningfully lower your effective rate below the state average used in this calculator.

Appealing your assessment

If you believe your assessed value is higher than your home’s fair market value, you have the right to appeal. The appeal process varies by jurisdiction but generally involves submitting comparable sales data (comps) showing that similar homes sold for less than your assessed value. Successful appeals are common, particularly after rapid market corrections, and can reduce your tax bill for several years.

Property taxes and your mortgage

If you have a mortgage, your lender almost certainly requires you to fund an escrow account that pays property taxes on your behalf. Your total monthly housing payment (PITI) includes principal, interest, taxes, and insurance. The property tax component is your annual estimate divided by 12. Lenders re-evaluate the escrow account annually and adjust your monthly payment if the actual tax bill differs from the estimate.

Disclaimer

This calculator uses each state’s average effective property tax rate (taxes paid ÷ home market value) sourced from Tax Foundation and WalletHub 2024 data. Actual rates vary by county, city, school district, and other local taxing jurisdictions, and may differ substantially from the state average. Exemptions, assessment limitations, and special levies are not reflected. This tool is for informational and estimation purposes only. For your actual tax liability, contact your local county assessor’s office or a licensed real estate tax professional.