Property tax is an annual tax that local governments charge on the value of what you own, most often a home or a building, and sometimes business equipment. It is an ad valorem tax, meaning the amount scales with the property’s value rather than being a flat fee. Counties, cities, school districts, and special districts each set their own rate, add them together, and apply the total to your property’s assessed value to produce the bill you receive in the mail. Property tax is the largest single source of revenue for local governments in the United States, funding schools, fire departments, roads, and other local services.
What Property Is Taxed
Taxable property falls into two categories. Real property is the land plus anything permanently attached to it: a house, a commercial building, a garage, a fence. Tangible personal property is movable physical property, and in practice this almost always means business assets such as machinery, office furniture, computers, and equipment.
Personal belongings you keep at home, like clothing and household furniture, are exempt in most jurisdictions. Intangible property such as stocks, bonds, patents, and trademarks is exempt in the vast majority of states, though a handful still tax certain intangible business assets. A few asset types sit on the line. A mobile home may be taxed as real property if it sits on a permanent foundation, or as personal property if it remains movable. Boats and aircraft appear on personal property rolls in some places.
How Assessors Set Your Property’s Value
Every bill starts with the fair market value of the property, which is the price a willing buyer and willing seller would agree to in an open transaction. Local assessors estimate this figure by looking at recent sales of comparable properties, the cost to rebuild minus depreciation, or the income the property could produce, depending on what fits the property type.
Most states do not tax the full market value. They apply an assessment ratio that converts market value into a lower assessed value, and the ratios vary widely, from around 6% to over 40% depending on the state and property type. A home worth $300,000 in a state with a 10% assessment ratio has an assessed value of $30,000, and that lower figure is what the tax rate is applied to. Assessors reappraise periodically to keep values current, and real property parcels are typically inspected at least once every few years.
Business personal property is handled differently. Assessors start with the original cost you reported (purchase price plus freight, sales tax, and installation) and apply a depreciation schedule that reduces the taxable value each year as the equipment ages. A five-year-old machine is taxed on a fraction of what you originally spent.
How Your Bill Is Calculated
Once assessed value is set, the local tax rate finishes the math. Most jurisdictions express the rate in mills, where one mill equals one dollar of tax per $1,000 of assessed value. If your assessed value is $40,000 and the combined rate is 25 mills, the annual tax is $1,000.
The rate on your bill is almost never a single number from a single authority. It is a stack: the county, the municipality, the school district, and sometimes special districts for libraries, fire protection, or transit each set their own rate based on their budgets, and the assessor combines them. Two houses with identical market values can carry very different bills if they sit in different school districts or towns.
Exemptions That Lower Your Bill
Exemptions reduce the taxable value of your property before the rate is applied, so they lower the bill directly. The most common is the homestead exemption, offered by most states for a primary residence. You generally must own the home, live in it as your main residence, and apply within a set window after purchase. Some states reduce the assessed value by a flat dollar amount, others by a percentage, and a few cap how much the assessed value can rise each year once you qualify.
Beyond the basic homestead, common categories of relief include:
- Enhanced exemptions or assessment freezes for owners over 65, which can lock in a taxable value.
- Property tax relief for veterans with service-connected disabilities. Every state offers some version, ranging from a modest reduction at lower disability ratings to a full exemption at 100%. Programs are state-administered, so thresholds and amounts differ everywhere.
- Exemptions for property owned and actively used by qualifying charitable, religious, and educational organizations. Most jurisdictions require annual filings to keep the exemption in place.
None of these are automatic. You apply through the county assessor’s office and submit documentation. Missing the application deadline usually costs you the exemption for the entire tax year.
Filing a Personal Property Declaration
If you own business equipment, you are probably required to file an annual personal property declaration with your local assessor. The assessor handles real property on their own using public records and market data, but personal property is on you.
The declaration is an itemized inventory: for each piece of taxable property you list the original cost (including shipping and installation), the year acquired, and a description. The assessor then applies a depreciation schedule to arrive at the current taxable value. These forms are signed under penalty of perjury, and the numbers should line up with your accounting records and receipts. Underreporting can trigger penalties in an audit. Forms are available through the county assessor’s office, usually online, and most filing deadlines fall in the first few months of the year.
Paying the Bill
After the assessor sets the value and the rate is applied, you receive a bill by mail. Most jurisdictions split the annual amount into two or more installments on fixed dates, commonly in the fall and spring, though some allow quarterly payments. Whatever the schedule, pay by the printed due date or face penalties.
Payment methods usually include electronic transfers, credit and debit cards, mailed checks, and in-person payments, and many counties now run online portals with instant confirmation. If you have a mortgage, your lender likely collects property taxes monthly through an escrow account and pays the bill for you, so you never see the bill directly but still bear the cost.
If you cannot pay in full, some jurisdictions offer extended payment plans that spread the balance over months or years with interest. Defaulting on a plan can bar you from another one for several years and speed up collection, so only sign up for a plan you can realistically maintain.
How to Appeal an Assessment You Think Is Too High
If your property has been overvalued, you can appeal. You file a formal protest with the assessor’s office within a set window after receiving your valuation notice, typically 30 to 60 days. If the assessor does not adjust the value to your satisfaction, the next step is a local board of equalization or review board, and after that a tax court.
The burden of proof is on you. Winning means showing that the assessor’s value exceeds what your property is actually worth. The strongest evidence is recent sale prices of comparable nearby properties, an independent appraisal, documentation of damage or defects the assessor missed, and errors in the assessor’s records such as an incorrect square footage or lot size. A high bill on its own is not grounds for a reduction; you have to show the underlying value is wrong.
Be aware that filing an appeal can prompt the assessor to take a closer look at your property, and in some cases the review results in a higher valuation, not a lower one. Go in with evidence, not a feeling.
What Happens If You Don’t Pay
Ignoring a property tax bill is one of the fastest routes to losing your home. Interest and penalties start accruing the moment the payment is late. Annual interest rates on delinquent property taxes typically run from 10% to 18%, and some jurisdictions raise the rate the longer the balance sits. The charges compound, and a manageable balance can grow substantially within a couple of years.
After a period of delinquency, usually two to three years, the local government places a tax lien on the property. That lien takes priority over almost every other debt, including your mortgage. The jurisdiction can then either sell the lien to a private investor at auction or move to foreclose directly. If the lien is sold, the investor pays off the tax debt, and you owe the investor the full amount plus interest at often steep statutory rates. If you do not pay within the redemption period, the investor can foreclose and take ownership.
Some jurisdictions give you a right of redemption, a window to reclaim the property by paying all back taxes, interest, penalties, and fees. Once that window closes or the deed transfers, the property is gone.
Deducting Property Taxes on Your Federal Return
If you itemize on your federal return, you can deduct state and local property taxes you paid during the year. This covers both real property taxes and personal property taxes that are based on value.1Office of the Law Revision Counsel. 26 USC 164 – Taxes Assessments for local improvements that increase your property’s value, such as a new sidewalk, are not deductible.
The main limit is the State and Local Tax (SALT) cap. For 2026, you can deduct a combined total of up to $40,400 in state and local income taxes (or sales taxes) plus property taxes. The cap is $20,200 if you are married filing separately. For taxpayers with adjusted gross income above $500,000, the cap phases down at a 30% rate, with a floor of $10,000.1Office of the Law Revision Counsel. 26 USC 164 – Taxes If you take the standard deduction, property taxes give you no federal benefit.
When a property is sold partway through the year, the deduction is split between buyer and seller based on the days each owned the property during that tax year, regardless of who actually paid the tax collector.1Office of the Law Revision Counsel. 26 USC 164 – Taxes The allocation typically shows up on the closing statement, and both parties need it right for their returns.