How US Property Tax Works: Rates, Assessments, and Homestead Exemptions

Unlike federal income tax, property tax in the US is entirely a state and local matter — there is no federal property tax, and the rules that determine your bill are set by your state, county, and sometimes your city or school district. That's why two homes of identical value in different parts of the country can have property tax bills that differ by thousands of dollars a year. This guide explains how assessments work, why rates vary so much, what a homestead exemption does, and how property tax interacts with your federal return.

Who Sets Property Tax, and Who Assesses Your Home

Property tax is levied by local governments — typically counties, cities, and school districts — to fund schools, police, fire departments, and other local services. Each year (or on whatever cycle your jurisdiction uses), a county assessor determines your home's assessed value, which is then multiplied by the local tax rate (sometimes called a millage rate) to calculate your bill.

Assessed value is often close to market value, but not always identical — some jurisdictions assess at a percentage of market value, and some states place limits on how quickly assessed value can rise even if the market value of the home increases faster.

Why Rates Vary So Much by State

Effective property tax rates (tax paid as a percentage of home value) range roughly from under 0.5% in low-tax states like Hawaii and Alabama, to over 2% in high-tax states like New Jersey and Illinois. The difference comes down to how much local governments rely on property tax versus other revenue sources (like state income or sales tax) to fund services — states with no income tax, for example, often lean more heavily on property tax instead.

Assessment Caps: Why California Is Different (Prop 13)

Most states reassess property values regularly, letting assessed value track market value fairly closely over time. California is a well-known exception: under Proposition 13, annual increases in assessed value are capped regardless of how much the home's market value has risen, and the property is generally only reassessed to full market value when it's sold. This means two otherwise identical homes on the same street can have very different tax bills if one owner has held the property for decades and the other just purchased it. A handful of other states have similar, though usually less aggressive, assessment limits.

The Homestead Exemption

Most states offer some form of homestead exemption — a reduction in the taxable assessed value for a home that is the owner's primary, owner-occupied residence. The concept is broadly similar everywhere: it lowers your taxable base and therefore your bill. But the specific dollar amount, eligibility rules (age, income, disability, veteran status), and even whether the exemption exists at all vary widely from state to state. Because of this variation, homeowners should look up their own state and county's specific homestead exemption rules rather than assume a particular number applies everywhere.

Worked Example: Same Home Price, Different States

Consider a home valued at $400,000 in two different states, to see how much the local rate alone changes the bill:

State	Approx. effective rate	Estimated annual property tax
Low-rate state (e.g. Hawaii, Alabama)	~0.3%–0.4%	~$1,200–$1,600
High-rate state (e.g. New Jersey, Illinois)	~2.0%–2.2%	~$8,000–$8,800

The same $400,000 home can owe roughly five to seven times more in annual property tax purely because of where it's located — a gap that matters just as much as home price when comparing the true cost of homeownership between states.

Property Tax and Your Federal Return: The SALT Cap

If you itemize deductions on your federal return, you can deduct property tax you paid — but only as part of the combined state and local tax (SALT) deduction, which is capped at $10,000 per return. That cap covers property tax added together with state and local income tax (or sales tax, if you elect that instead). Homeowners in high property-tax states easily hit or exceed this cap using property tax alone, meaning any state income tax paid on top of it provides no additional federal deduction. Since the standard deduction is large enough that most taxpayers don't itemize at all, many homeowners get no federal tax benefit from their property tax whatsoever. See our 2026 deductions guide for how the SALT cap fits into the broader itemizing-vs-standard-deduction decision.

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