US Property Tax Calculator by State
Estimate your annual property tax using state average effective rates — or enter your own local rate if you know it.
Current market value (or purchase price) — not your county assessor’s assessed value, which can differ.
US Property Tax Calculator by State
Unlike income tax, property tax in the US isn’t set by state legislatures — it’s set locally, by counties, cities, school districts, and special taxing authorities, layered on top of each other. That means there’s no single “New Jersey property tax rate” the way there’s a New Jersey income tax bracket table; there’s only an average across thousands of local jurisdictions, some charging far more than others. This calculator uses each state’s average effective rate to give you a starting estimate, and lets you swap in your own local rate the moment you know it.
What “Effective Rate” Actually Means
Your local assessor publishes a nominal rate (sometimes called a mill rate) that applies to your property’s assessed value — which is often a different, sometimes much lower, number than its actual market value, especially in states with assessment caps or infrequent reassessment cycles. The “effective rate” this calculator uses instead is simply: annual property tax actually paid, divided by market value. That’s the only way to compare tax burden fairly across states with wildly different assessment methods — comparing nominal mill rates directly across states would be comparing apples to oranges.
Why State Averages Only Go So Far
Effective rates vary enormously within a single state. Illinois counties, for example, range from under 1% to over 2% — more than double, all within one state’s average. If you already know your county or city’s actual rate (from a recent tax bill, a real estate listing, or your local assessor’s website), use the manual override above instead of the state average for a meaningfully more accurate number.
Homestead Exemptions and Assessment Caps
Several states have mechanics that can make a longtime owner-occupant’s actual bill considerably lower than the state average implies. Florida’s homestead exemption and “Save Our Homes” cap limit how fast assessed value can rise for a primary residence. California’s Prop 13 similarly caps assessment growth, often keeping longtime owners’ effective rates far below what a recent buyer pays on an identical house next door. These mechanics aren’t calculated here — they depend on purchase date, occupancy status, and prior assessment history — but are noted per state where applicable.
Example: $400,000 Home
At the national average effective rate of roughly 0.86%, a $400,000 home carries about $3,440/year in property tax — but the same home in a low-rate state like Hawaii or Alabama (both under 0.4%) might owe under $1,600/year, while the same home in New Jersey or Illinois (both near the top at roughly 1.9%) could owe over $7,500/year — nearly five times as much, for an identical house, purely based on location.
Frequently Asked Questions
Why does this show a state average instead of my exact property tax?
Property tax in the US is set at the county and municipal level, not the state level — there’s no single legislated state rate the way there is for income tax brackets. This calculator uses each state’s average effective rate, which can differ significantly from your specific county or city’s actual rate. If you know your local rate, use the manual override to get a more precise estimate.
What is an “effective” property tax rate?
It’s annual property tax paid divided by the home’s market value, expressed as a percentage — not the nominal mill rate a local assessor publishes, which applies to assessed value (often a different, sometimes much lower, figure than market value). Effective rate is the standard metric used to compare property tax burden fairly across states.
Does this account for homestead exemptions or assessment caps?
No. States like Florida and California have mechanics that can significantly lower a longtime owner-occupant’s actual bill below the state average — noted where applicable but not calculated, since they depend on purchase date, occupancy status, and other factors this calculator doesn’t collect.
How current is this data?
Effective property tax rate data is sourced from Census Bureau American Community Survey estimates, which typically lag 1-2 years behind the current year — this is normal for this type of data, not a currency problem with this calculator.
This calculator provides a state-average estimate of property tax based on Census/Tax Foundation effective rate data. Your actual property tax depends on your specific county, city, school district, assessed value, and any exemptions you qualify for. Check your county assessor’s office or a recent tax bill for your actual rate.
