Property tax is the primary funding source for local governments — schools, fire departments, roads, and parks all depend on it. Unlike income or sales tax, it’s levied annually on what you own, not what you earn. Here’s how it works, what you’ll pay in different states, and how to reduce your bill legally.
How Property Tax Is Calculated
Property tax is calculated using two variables: the assessed value of your property and the mill rate (also called the tax rate or millage rate) set by local taxing authorities.
Formula:
Property Tax = (Assessed Value × Mill Rate) ÷ 1,000
Or equivalently:
Property Tax = Assessed Value × Effective Tax Rate
Assessed Value vs. Market Value
Many jurisdictions assess property at less than full market value:
- Assessment ratio: The percentage of market value used for tax purposes. A $400,000 home in a jurisdiction with an 80% assessment ratio is assessed at $320,000.
- Equalization rate: Some states apply a further adjustment to ensure uniform assessment across districts.
When you see a “1.5% property tax rate,” it typically refers to the effective rate — taxes owed as a percentage of market value — which already accounts for assessment ratios.
Practical Example
- Home market value: $450,000
- Assessment ratio: 100% (common in many states)
- Assessed value: $450,000
- Effective tax rate: 1.07% (national average)
- Annual property tax: $450,000 × 0.0107 = $4,815
Property Tax Rates by State: Highest and Lowest
Effective property tax rates vary enormously by state — from under 0.3% to over 2%.
Highest Property Tax States (Effective Rate on Owner-Occupied Homes)
| State | Effective Tax Rate | Avg. Annual Tax on $300K Home |
|---|---|---|
| New Jersey | 2.23% | $6,690 |
| Illinois | 2.08% | $6,240 |
| Connecticut | 1.79% | $5,370 |
| New Hampshire | 1.77% | $5,310 |
| New York | 1.73% | $5,190 |
| Texas | 1.60% | $4,800 |
| Vermont | 1.59% | $4,770 |
| Wisconsin | 1.51% | $4,530 |
Lowest Property Tax States
| State | Effective Tax Rate | Avg. Annual Tax on $300K Home |
|---|---|---|
| Hawaii | 0.27% | $810 |
| Alabama | 0.37% | $1,110 |
| Colorado | 0.49% | $1,470 |
| Nevada | 0.50% | $1,500 |
| South Carolina | 0.52% | $1,560 |
| Arizona | 0.54% | $1,620 |
| Louisiana | 0.55% | $1,650 |
| Wyoming | 0.57% | $1,710 |
Important caveat: Low property tax states often have higher sales taxes or rely more on income tax. Texas has no income tax but above-average property taxes; Hawaii has low property taxes but high home prices and income taxes.
Why Texas Has High Property Taxes Despite No Income Tax
Texas uses property taxes as its primary funding mechanism in lieu of a state income tax. Local school districts, counties, and municipalities each levy their own rates, which stack on top of each other. In many Texas metro areas, the combined mill rate exceeds 2.0%, making the effective tax rate one of the highest in the nation — even on a median-value home.
How Property Tax Assessments Work
The Assessment Cycle
Most jurisdictions reassess properties on a fixed cycle — annually, every 3 years, or only when a property sells (as in California under Proposition 13). In high-appreciation markets, jurisdictions that assess infrequently can have large gaps between taxable assessed value and market value.
California’s Proposition 13: Since 1978, California limits assessed value increases to 2% per year (plus CPI, capped at 2%) until the property sells. A homeowner who bought in 1990 may pay taxes on an assessed value far below current market value, while a recent buyer next door pays taxes on the full purchase price.
Appealing Your Assessment
If you believe your assessment is too high, you can appeal. The process typically involves:
- Reviewing your assessment notice for errors (square footage, bedroom count, lot size)
- Gathering comparable sales (“comps”) of similar properties at lower values
- Filing an appeal with your local Board of Assessment Review within the deadline (often 30–90 days from assessment notice)
Studies suggest that property owners who appeal have a 40–60% success rate. Even a $20,000 reduction in assessed value saves roughly $200–$400 per year in property tax.
Common Property Tax Exemptions
Homestead Exemption
The most widely available exemption. If your primary residence is your home, most states reduce the assessed value by a flat dollar amount or percentage:
- Florida: Up to $50,000 off assessed value for primary residence
- Texas: $100,000 homestead exemption from school district taxes (as of 2023)
- Georgia: $2,000 off assessed value from school taxes; many counties add more
- California: $7,000 off assessed value for primary residence
Senior/Elderly Exemption
Available in most states for homeowners above a certain age (typically 65+), often with income limits. Benefits range from modest assessment reductions to complete property tax freezes.
- New York STAR program: Provides a school tax relief benefit for homeowners; enhanced credit for seniors 65+ with income under $98,700 (2025)
- Illinois Circuit Breaker: Rebate program for seniors and disabled residents
- Texas: Seniors 65+ receive an additional $10,000 school district exemption and can freeze school district taxes at their current level
Veteran Exemptions
Most states offer property tax exemptions or reductions for veterans, particularly disabled veterans:
- Texas: Disabled veterans with 100% disability rating receive a complete property tax exemption on their primary residence
- Florida: Disabled veterans with 10%+ service-connected disability receive a $5,000 exemption; 100% disabled veterans receive full exemption
- California: Disabled veterans with low income may qualify for a full exemption
Other Exemptions
- Agricultural land: Land actively used for farming is often assessed at agricultural value rather than development potential value
- Conservation easements: Restricting development rights can reduce assessed value
- Solar and green energy: Some states exempt the added value of solar panels from assessment
The SALT Deduction Cap
For federal income tax purposes, homeowners who itemize deductions can deduct state and local taxes, including property taxes. However, the SALT deduction is currently capped at $10,000 per year ($5,000 for married filing separately) under the Tax Cuts and Jobs Act. This cap is scheduled to expire after 2025, but its future is subject to ongoing legislation.
For homeowners in high-property-tax states paying $15,000+ per year in property taxes, the cap limits the federal tax benefit they can claim.
Key Takeaway
Property tax is highly local — rates, assessment practices, and exemptions vary by state, county, and even municipality. Knowing your effective rate, checking whether you qualify for homestead or senior exemptions, and understanding appeal rights can meaningfully reduce your annual bill. For a broader view of how property taxes fit into your total tax picture, use our income tax calculator.