Property taxes are a local tax on real estate that funds schools, roads, and emergency services in your area

Property taxes are calculated by your county or municipality based on the assessed value of your land and building. The tax rate varies by location — a house worth $300,000 in one county might owe $3,000 per year, while the same house in another county might owe $6,000. The difference comes down to local tax rates, which are set by your school district, county, city, and special districts like fire or water authorities.

You pay property taxes once or twice a year, depending on where you live. The money goes directly to local government and school systems — not to the federal government. If you have a mortgage, your lender often collects property taxes as part of your monthly payment and holds them in an escrow account until they are due.

Key Takeaways

  • Property tax is based on the assessed value of your property, not the price you paid for it, and the assessment is updated periodically by your county assessor.
  • Your tax bill equals the assessed value multiplied by the local tax rate, which is set by your county, school district, city, and other local authorities.
  • If you own your home outright, you pay the tax bill directly; if you have a mortgage, your lender usually collects it monthly and pays it on your behalf.
  • You can challenge your assessment if you believe it is too high, and the process for doing so varies by county but usually involves filing a formal objection.

How the assessed value is determined

Your county assessor's office determines the assessed value of your property, which is the basis for your tax bill. This value is not the same as the market value — the price you could sell the house for today. Instead, assessors use a formula that may include recent sales of similar homes in your area, the condition of your building, the size of your lot, and any improvements you have made.

Most counties reassess property every one to four years. Some states reassess only when a property changes hands. When you buy a house, the assessed value often jumps to reflect the purchase price, which is why your property tax bill may increase sharply after you move in. If you make major improvements — adding a room, replacing the roof, or finishing a basement — the assessor may increase the value again.

You can request a copy of your assessment from your county assessor's office, usually for free or a small fee. The assessment notice is also mailed to you before your tax bill arrives, giving you a chance to object if the value seems wrong.

How the tax rate is calculated

Your property tax rate is expressed as a percentage of the assessed value, though the exact format varies by state. Some states use a "mill rate" — the tax per $1,000 of assessed value. Others use a percentage. A mill rate of 15 mills means you pay $15 in tax for every $1,000 of assessed value; a house assessed at $300,000 would owe $4,500 per year.

The tax rate is set by multiple local authorities. Your school district sets a rate to fund schools. Your county sets a rate for county services. Your city or township sets a rate for local services like police and roads. Special districts — for fire protection, water, or libraries — may add their own rates. All these rates are added together to create your total tax rate.

Tax rates are public information, published by your county assessor or tax collector. You can find your rate by searching "[your county] property tax rate" or calling the assessor's office. Rates change year to year as local budgets change, which is why your tax bill may go up or down even if your home's value stays the same.

When and how you pay property taxes

Property taxes are due on a schedule set by your county or municipality. Most areas bill twice a year — often in spring and fall — though some bill once annually. The due date varies widely; some counties give you 30 days to pay, others give 60. If you miss the important date, you owe a penalty and interest, which can add up quickly.

If you have a mortgage, your lender collects property taxes monthly as part of your mortgage payment. The money goes into an escrow account held by the lender, and the lender pays the tax bill on your behalf when it is due. This means you never see the bill or write a check — the lender handles it. If you own your home outright, you receive the bill directly and must pay it yourself.

You can pay by mail, in person at your county tax collector's office, or online through your county's website. Some counties allow automatic payments or payment plans if you cannot pay the full amount by the due date. If you fall behind, the county can place a lien on your property, and in extreme cases, foreclose and sell the home to recover the unpaid taxes.

Challenging your assessment if you think it is too high

If you believe your assessed value is incorrect, you can file a formal objection. The process and important date vary by state and county, but most areas give you 30 to 60 days after the assessment notice arrives to file. You typically submit a written objection to your county assessor or a board of review, explaining why you think the value is wrong.

To support your case, gather evidence: recent sales of similar homes in your neighborhood, photos of damage or needed repairs, or a professional appraisal. If your home is in poor condition compared to others nearby, or if recent comparable sales are lower than the assessed value, you have grounds to object. Some counties hold hearings where you can present your case in person; others decide based on written submissions.

If the assessor denies your objection, you may be able to appeal to a county board of review or take the case to court, though court cases are expensive and rarely worth the cost unless the assessment is drastically wrong. Many people find that a successful objection saves them hundreds of dollars per year in taxes.

How property taxes differ by state and location

Property tax rates vary dramatically across the United States. New Jersey, Illinois, and Connecticut have some of the highest rates, with homeowners paying 1.5% to 2% of their home's value annually. Hawaii, Alabama, and Louisiana have much lower rates, sometimes below 0.5%. The difference reflects local spending priorities — states that fund schools heavily through property taxes have higher rates than states that rely more on income or sales taxes.

Within a state, rates also vary by county and school district. A house in a wealthy suburb with excellent schools might have a higher tax rate than an identical house 10 miles away in a rural area. This is because school districts set their own rates based on their budgets, and wealthier districts sometimes have lower rates because their tax base is larger.

Some states offer homestead exemptions or other breaks for owner-occupied homes, seniors, or disabled veterans. These reduce the assessed value or tax rate for people who meet certain conditions. If you think you might may have access to, contact your county assessor to ask what programs are available in your area.

What happens if you do not pay property taxes

Unpaid property taxes accumulate penalties and interest, usually 1% to 2% per month depending on your state. After a set period — typically 120 days to two years — the county can place a tax lien on your property. A lien means the county has a legal claim against your home and can force a sale to recover the debt.

If taxes remain unpaid long enough, the county holds a tax sale or foreclosure auction. Your home is sold to pay off the debt, and you lose ownership. The exact timeline varies by state, but it is usually faster than a mortgage foreclosure. Some states allow you to reclaim the property within a set period after the sale if you pay the taxes plus costs, but this window is limited.

If you cannot pay your full tax bill, contact your county tax collector when ready. Many counties offer payment plans, temporary deferrals for seniors or disabled people, or hardship programs. Acting early gives you more options than waiting until a lien is filed.

Frequently Asked Questions

Can I deduct property taxes on my federal income tax return?

Yes, but only if you itemize deductions on your federal tax return. The deduction is capped at $10,000 per year for all state and local taxes combined (property, income, and sales taxes). Most homeowners can deduct property taxes, but the benefit depends on your total tax situation and whether itemizing is worth more than the standard deduction.

What is the difference between assessed value and market value?

Market value is what your home would sell for today. Assessed value is what the county estimates for tax purposes, and it is often lower than market value. Assessors use formulas and comparable sales data rather than actual appraisals, so the two numbers can differ significantly. After you buy a home, the assessed value usually rises toward the market value.

Do renters pay property taxes?

Renters do not pay property taxes directly — the landlord does. However, property taxes are often factored into the rent you pay, since landlords pass their costs on to tenants. So while you do not write a check for property taxes, you are indirectly paying them as part of your monthly rent.

What if I disagree with the county assessor's decision on my objection?

Most states allow you to appeal to a county board of review or equalization board. If that fails, you can file a lawsuit in county court, though legal costs often exceed the tax savings unless the assessment is very wrong. Some counties also allow binding arbitration as a cheaper alternative to court.

How often does the assessed value change?

Reassessment schedules vary by state. Some counties reassess every year, others every two to four years. Many states reassess only when a property is sold. Even in years without a full reassessment, your value may change if you make major improvements or if the assessor discovers an error in the previous assessment.