Your property tax bill comes from your local assessor and tax collector, not from a state or federal office

The amount you owe depends on three things: the assessed value of your property (set by your county or municipal assessor), the tax rate in your jurisdiction (set by your local government), and any exemptions or deductions you may have. There is no single national property tax rate — it varies dramatically by county, city, and sometimes by school district within the same county. A house worth $300,000 might owe $2,000 a year in one county and $6,000 in another.

The fastest way to find your bill is to contact your county assessor's office or tax collector's office directly. Most counties now post property tax information online, searchable by address or parcel number. You can also find the bill itself in the mail — it arrives annually, usually in spring or fall depending on your state's schedule. If you have a mortgage, your lender may also send you a copy.

Key Takeaways

  • Your property tax amount is calculated by multiplying your property's assessed value by your local tax rate, which varies by county and municipality.
  • The county assessor determines the assessed value; the county or city tax collector determines the rate and sends you the bill.
  • You can find your bill by searching your county assessor's website, calling the assessor's office, or checking the mail during your jurisdiction's billing season.
  • Exemptions (for seniors, veterans, or disabilities) and homestead deductions can lower your bill, but you must request them separately from the assessor.
  • If you disagree with the assessed value, you can file a formal challenge called an appeal or grievance, with deadlines that vary by state.

How the assessed value is determined

Your county assessor estimates the market value of your property — the price it would sell for on the open market — and that estimate becomes your assessed value. Assessors use recent sales of similar properties in your area, the condition and size of your building, the lot size, and local market trends. They do not always visit every property every year; many use computer models based on neighborhood data.

The assessed value is usually lower than the actual market value. Most states cap the percentage of market value that can be taxed, or they reassess properties on a schedule (every 3 to 5 years in some states, every year in others). A few states use the full market value. The specific rules depend entirely on your state and county.

You can request a copy of your property's assessment record from the assessor's office. This record shows the assessed value, the factors used to calculate it, and sometimes the comparable sales the assessor used. If you believe the assessment is wrong, this record is your starting point for filing an appeal.

Understanding the tax rate and how it applies

The tax rate is set by your local government — usually the county, but sometimes the city, school district, or a combination. The rate is expressed as a percentage of assessed value or as a dollar amount per $1,000 of assessed value. For example, a rate of 1.2% means you owe $1,200 per $100,000 of assessed value. A rate of 12 mills (another common way to express it) means $12 per $1,000 of assessed value, which is the same as 1.2%.

The tax rate is public information and is usually posted on your county tax collector's website or in the county budget documents. Rates can change year to year as local governments adjust their budgets. Your bill will show the rate applied to your property.

Some jurisdictions have different rates for different property types — residential, commercial, agricultural, or vacant land. If your property is classified differently than you expected, that affects your bill and is worth checking with the assessor.

Exemptions and deductions that reduce your bill

Many states and counties offer exemptions or deductions that lower the assessed value or the amount of tax owed. Common ones include homestead exemptions (for primary residences), senior exemptions, veteran exemptions, disability exemptions, and agricultural exemptions. Some states also offer exemptions for religious organizations, nonprofits, or government property.

Exemptions are not automatic. You must request them from the assessor's office, usually by filing a form and providing proof of your status (a deed showing it is your primary residence, a military discharge certificate, a disability information letter, or similar). Deadlines vary by state — some have rolling deadlines, others have a single filing window each year. Missing the deadline can mean waiting until the next year to claim the exemption.

If you think you may have access to for an exemption, contact your assessor's office and ask what forms and proof are required. The office can tell you the deadline and whether you can file retroactively if you missed it.

How to locate your bill online or by mail

Most county assessor and tax collector offices now maintain searchable databases on their websites. You can usually search by property address, owner name, or parcel number. The parcel number appears on your deed and on any previous tax bills. Searching by address is usually the easiest route if you do not have the parcel number.

The online record typically shows the assessed value, the tax rate, the total amount owed, and the payment due date. Some counties also show a payment history and allow you to set up automatic payments or pay online directly from the website.

If you do not find your property online or prefer to speak to someone, call the assessor's office or tax collector's office. They can confirm the amount owed, the due date, and whether any exemptions are currently applied to your account. Have your address and parcel number ready when you call.

What to do if you think your assessment is wrong

If you believe your assessed value is too high, you can file a formal appeal or grievance. The process and timeline vary by state. Some states require you to file within 30 days of receiving your bill; others give you 45 days or longer. A few states allow year-round appeals. Missing the deadline usually means you cannot challenge that year's assessment.

The appeal process typically starts with a written request to the assessor's office. You will need to explain why you think the value is wrong and provide supporting evidence — recent appraisals, comparable sales in your area, photos of damage or needed repairs, or documentation of a recent purchase price if it was lower than the assessed value. The assessor will review your request and either adjust the value or deny the appeal.

If the assessor denies your appeal, most states allow a second level of appeal to a county board of assessment review or similar body. This board holds hearings and can overturn the assessor's decision. If you lose at that level, you may be able to take the case to tax court, though this usually requires hiring an attorney and is expensive. Many people stop after the first or second appeal.

Payment deadlines and what happens if you do not pay

Property tax bills include a due date, which varies by state and county. Some jurisdictions bill once a year; others bill twice. If you do not pay by the due date, you will owe a penalty and interest. The penalty is usually a percentage of the unpaid tax (5% to 10% is common), and interest accrues monthly or annually depending on your state.

If property tax remains unpaid for several years, the county can place a lien on your property, meaning the county has a legal claim against it. Eventually, the county may foreclose on the property and sell it at a tax sale to recover the unpaid tax. The timeline for this varies by state — some allow foreclosure after two years of nonpayment, others after five or more years.

If you cannot pay your full bill by the due date, contact the tax collector's office immediately. Many jurisdictions offer payment plans, deferrals for seniors or low-income owners, or temporary relief programs. The sooner you reach out, the more options you may have.

Frequently Asked Questions

Where do I find my parcel number if I do not have a recent tax bill?

Your parcel number appears on your deed, your mortgage documents, and any property tax bill you have received. You can also call the county assessor's office and provide your address; they will give you the parcel number over the phone. Some county websites allow you to search by address without a parcel number.

Can my property tax bill change from year to year even if I do not make improvements?

Yes. The assessed value can change if the assessor reassesses the property (on a schedule set by your state), if the tax rate changes (which happens when the local government adjusts its budget), or if you lose an exemption you previously had. Some states cap how much the assessed value can increase in a single year, even if the market value rises more.

What is the difference between assessed value and market value?

Market value is what your property would sell for today. Assessed value is the estimate your county assessor uses to calculate your tax bill, and it is often lower than market value. The relationship between the two depends on your state's laws — some states tax a percentage of market value, others use a different formula.

Do I have to pay property tax if I own my home outright with no mortgage?

Yes. Property tax is owed by the owner of record, whether or not there is a mortgage. If you own the property free and clear, you are responsible for paying the tax directly to the tax collector. The tax collector will send you a bill, usually once or twice a year depending on your jurisdiction.

Can I appeal my assessment more than once?

Most states allow you to appeal each year's assessment separately, as long as you meet the deadline for that year. If you lose an appeal, you can usually file again the following year if the assessed value changes or if you have new evidence. However, you cannot appeal the same assessment twice in the same year — once the assessor or board of review makes a decision, that year's case is closed.