The property tax rate by county in the United States ranges from under 0.18% to over 2.95% of a home’s value, and the figure that applies to your address is a composite of every local levy that reaches your parcel.1Tax Foundation. Property Taxes by State and County, 2026 To find your exact rate, pull up your county treasurer or assessor’s online portal and enter your Parcel Identification Number. The site returns a tax rate sheet listing each individual levy, the total composite rate, and your assessed value.
How to Look Up Your County’s Rate
Most counties publish tax rate information through an online portal run by the treasurer or assessor. You’ll need your Parcel Identification Number, sometimes called the PIN or Assessor’s Parcel Number. It appears on a previous tax bill, your property deed, or through the county recorder’s office.
Once you enter the parcel number, the system displays each taxing authority drawing from your property and how much each one charges. If you’d rather talk to a person, the county tax office can provide the current rate schedule by phone or in person. Some offices charge a small fee for certified copies. These records are public in every state, so you can view them whether or not you own the property.
What the Rate Is Actually Made Of
The single number on your bill is a stack of separate levies from every taxing authority that covers your address. School districts almost always take the largest slice. County government adds a rate for roads, courts, and general administration. Municipalities layer on charges for police, fire, and local infrastructure. Voter-approved levies for libraries, parks, or emergency medical services push the total higher.
Each authority sets its own rate based on its annual budget. The county tax collector combines them and sends you one bill. Two properties in the same county can face different total rates when one sits inside a city limit or a special district and the other doesn’t.
Your bill may also include charges from a special assessment district, which funds specific infrastructure benefiting a defined group of properties, such as road construction, drainage, or streetlighting.2Federal Highway Administration. Special Assessments Fact Sheet These go by names like improvement districts, road districts, and metropolitan districts. An unfamiliar line item on your bill is often one of these.
Mills, Dollars Per $100, and Percentages
Counties don’t use a single format for rates, which makes side-by-side comparison confusing. The three common expressions are mathematically equivalent:
- Mills. One mill equals one dollar of tax per $1,000 of assessed value. A rate of 95 mills means $95 for every $1,000 of assessed value.3Legal Information Institute. Millage
- Dollars per $100. A rate of $9.50 per $100 is the same as 95 mills.
- Percentage. A 9.5% rate on assessed value is, again, the same 95 mills.
To convert mills to a percentage, move the decimal one place to the left. To convert mills to a dollar-per-hundred rate, divide by 10. Before comparing counties, convert everything to the same unit, or the numbers will look wildly different even when the actual burden is identical.
Why the Rate Alone Doesn’t Tell You the Bill
The rate applies to your property’s assessed value, not to its market value. A local assessor determines market value first, meaning what the property would sell for under normal conditions.4New York State Department of Taxation and Finance. Assessments That market value then gets multiplied by an assessment ratio to produce the assessed value the rate is applied to.
Assessment ratios vary. Some jurisdictions assess at 100% of market value, so a $300,000 home has a $300,000 assessed value. Others use fractional ratios that differ by property type. In one state, residential property is assessed at 25% of appraised value while commercial is assessed at 40%. A $200,000 home assessed at 30% of market value would carry an assessed value of $60,000.4New York State Department of Taxation and Finance. Assessments This is why you can’t compare raw rates without also knowing the ratio. A county with a high millage but a 10% ratio may charge less than a county with a lower millage and full-value assessment.
Why Rates Vary So Much Between Counties
The national average county property tax bill in 2023 was $1,889, but that average conceals wide variation. Effective rates on owner-occupied homes at the state level range from roughly 0.29% to nearly 1.88%.1Tax Foundation. Property Taxes by State and County, 2026 At the county level, the spread is wider.5Tax Policy Center. How Do State and Local Property Taxes Work?
Several forces drive the differences:
- Population density and service demands. Urban counties fund professional fire departments, transit systems, and larger court systems. Rural counties often rely on volunteer services and maintain fewer roads.
- Tax base composition. Counties with large commercial or industrial sectors spread revenue across businesses, keeping residential rates lower. A primarily residential county leans harder on homeowners.
- State-level rules. Some states cap what local jurisdictions can set. Others require voter approval above a threshold. Assessment methods and ratios imposed by state law also shape the effective rate.
- Debt obligations. Counties that have issued bonds for schools, roads, or other infrastructure carry debt service levies folded into the rate until the bonds are paid off.
Exemptions That Lower What the Rate Applies To
Most counties offer exemptions that reduce your property’s taxable value, which cuts your bill even when the rate is unchanged. The most widely available is the homestead exemption for your primary residence. You typically qualify by being the legal owner, occupying the home as your main residence on a specific date, and not claiming a homestead exemption on any other property.
Many jurisdictions offer additional reductions:
- Senior citizens, often once you reach a certain age, typically 65. Some programs freeze your assessed value while you remain in the home.
- Disabled veterans with service-connected disabilities, with the amount often tied to the disability rating.
- People with disabilities, separate from the veteran exemption, for homeowners who cannot work due to a physical or mental disability.
- Low-income homeowners, where household income falls below a specified threshold.
Exemptions don’t apply automatically. You have to file an application with your county assessor’s office, and most jurisdictions set a spring deadline. Missing it usually means waiting a full year for the reduction.
Appealing Your Property Assessment
If the assessed value looks too high, you can challenge it. You’re appealing the assessed value, not the tax rate itself. Rates are set by budgets and voter approvals. Assessed value is supposed to reflect what your home is actually worth.
Valid grounds generally include:
- Overvaluation, where the assessor’s market value exceeds what your home would actually sell for, backed by a recent sale price or a professional appraisal.
- Inaccurate property data, such as wrong square footage, lot size, or bedroom count.
- Unequal assessment, where your property is assessed at a higher percentage of market value than comparable properties nearby.
The process starts with a written appeal to a local review board. Filing fees range from nothing to around $175. Deadlines are strict and usually tied to when you receive your assessment notice, not your tax bill. By the time the bill arrives, it’s generally too late to appeal for that year. Bring documentation: recent comparable sales, photos showing condition issues, or a professional appraisal. If the local board rules against you, most states allow further appeal to a state-level board or court.
The Federal Deduction Cap
Property taxes you pay to your county are deductible on your federal return if you itemize. Under 26 U.S.C. ยง 164, state and local real property taxes are an allowed deduction.6Office of the Law Revision Counsel. 26 USC 164 – Taxes The total deduction for all state and local taxes combined, including property, income, and sales taxes, is capped.
For tax year 2026, the cap is $40,400 for most filers, or $20,200 for married individuals filing separately. If your modified adjusted gross income exceeds $500,000, the cap gradually shrinks. These limits were set by the One Big Beautiful Bill Act, which raised the cap from the previous $10,000 level beginning in 2025 and indexes it at 1% annual increases through 2029. After 2029, the cap is scheduled to drop back to $10,000.6Office of the Law Revision Counsel. 26 USC 164 – Taxes The cap matters most in high-tax counties where combined state income tax and property tax push you past the ceiling.