How Is Property Tax Calculated? 2026 State-by-State

How is property tax calculated? Property tax is calculated by multiplying your home’s assessed value by your local tax rate, then subtracting any exemptions you qualify for. A $450,000 home assessed in full at a 1.10% effective rate owes about $4,950 a year before exemptions. The details — assessment ratios, local levies, homestead rules — explain why two similar homes can owe very different amounts.

Get your own estimate in seconds with the free property tax estimator — pick your state, enter your home value, and see the annual and monthly cost.

What is the formula for calculating property tax?

The real formula is: taxable assessed value × local tax rate = property tax owed. Your county assessor first values your home, applies your state’s assessment ratio if there is one, and subtracts exemptions. What remains is multiplied by the combined rate set by your county, town, school district, and any special districts.

Rates are often quoted in mills, where one mill is $1 of tax per $1,000 of assessed value — a 20-mill rate is the same as 2%. Because assessment ratios differ so much between places (some states assess at 100% of market value, others at a fraction), comparing mill rates across state lines is meaningless. That is why this guide uses effective rates: the tax actually paid as a share of home value, which can be compared anywhere.

How much property tax do you pay in each state in 2026?

Using typical statewide effective rates, a $450,000 home owes an estimated $11,115 a year in New Jersey (2.47%), the highest-rate state, and about $1,440 in Hawaii (0.32%), the lowest. Illinois (2.27%) and Connecticut (2.15%) follow New Jersey, while Alabama (0.41%), Colorado (0.51%), and Louisiana (0.56%) sit near the bottom. The national average is roughly 1.10%, or $4,950 a year on that same home.

The state pattern is not random. Northeastern and Midwestern states tend to fund schools and local services heavily through property tax, while many Southern and Western states lean more on sales or income taxes, or benefit from tourism and energy revenue. When you compare homes across states, run both prices through the property tax estimator — a cheaper house in a high-rate state can cost more per month than a pricier house in a low-rate state. If you are buying, pair that with the upfront costs in the closing costs estimator so the full picture is in your budget.

Why can state average tax rates mislead you?

A state average blends hundreds of local tax districts into one number, and your bill comes from exactly one of them. Within a single state, a home in a high-spending school district or a city with its own levy can owe double what a similar home owes twenty miles away. Falls Church, Virginia and rural Buchanan County share a state average but almost nothing else.

Averages also hide assessment quirks. Some states reassess every year, others every few years, and a few mostly on sale — so long-time owners may pay on a value far below market while new buyers pay on the full price. Treat any statewide figure, including the ones in this guide, as a planning estimate, then confirm with your county assessor or your most recent tax bill.

What is a homestead exemption and how much does it save?

A homestead exemption removes part of your primary home’s value from taxation before the rate is applied. If your state exempts $50,000 and your home is assessed at $450,000, you are taxed on $400,000 — at a 1.10% rate that saves $550 a year, every year, for as long as you own and live in the home.

Most states offer some version, and many add larger exemptions for seniors, veterans, and people with disabilities; a few states freeze assessed values for long-time homeowners. Exemptions usually are not automatic everywhere — in many counties you must apply once with the assessor, and missing the filing deadline means waiting a year. It is the single easiest legitimate way to lower a property tax bill.

How does escrow pay your property tax?

If you have a mortgage, your lender probably collects your property tax through escrow: one twelfth of the estimated annual bill is added to each monthly payment, held in an escrow account, and paid to the county when the bill comes due. You never write the big check yourself — but you absolutely still pay the tax, just smoothed into monthly pieces.

This is why your mortgage payment can rise even when your loan rate is fixed: if the county raises your assessment, the escrow portion grows. When you shop for homes, use the mortgage payment calculator and remember to mentally add the monthly tax estimate — on a $450,000 New Jersey home that is about $926 a month on top of principal and interest.

Frequently Asked Questions

Is property tax based on what I paid for my home?

Not exactly. It is based on the assessed value your county assigns, which aims to track market value but often lags it, especially in states that reassess infrequently. A recent purchase price is strong evidence of value, so bills often jump the year after a sale resets the assessment.

Can I appeal my property tax assessment?

Yes. Every jurisdiction has an appeal or protest process with a deadline, usually shortly after assessment notices arrive. Successful appeals show the assessment exceeds market value — using comparable sales — or that the assessor’s record has errors, such as wrong square footage. A lower assessment lowers your bill proportionally.

Do renters pay property tax?

Not directly, but landlords build property tax into rent, and in high-rate states it is one of the largest operating costs behind a rental. Some states also tax rental and second homes harder because homestead exemptions and assessment caps often apply only to a primary residence.

How often do property taxes change?

Your bill can change every year. Rates are reset annually by local governments, and assessed values update on your jurisdiction’s schedule — annually in some places, every few years in others, or when the property sells or is improved. Budget for gradual increases even if your mortgage payment itself is fixed.

Rates in this guide are typical statewide effective rates compiled from Tax Foundation and U.S. Census Bureau American Community Survey data, shown for estimation only. Your actual property tax depends on your county and local rates, your assessed value, and your exemptions; confirm current figures with your local tax assessor.