Property tax varies by location and is based on your home's assessed value, not its market price

Property tax is not a flat rate. The amount you pay depends on three things: where your property sits, what a government assessor says it is worth, and the tax rate your local government sets. A house worth $300,000 in one county might generate a $3,000 annual bill, while an identical house across the county line could cost $6,000 or more. The difference comes from assessor decisions and local tax rates, both of which vary widely.

Your property tax bill is calculated by multiplying your home's assessed value by the local tax rate, usually expressed as a percentage or per $1,000 of assessed value. If your assessor values your home at $250,000 and your local rate is 1.2%, you owe $3,000 per year. If the rate is 0.8%, you owe $2,000. Neither figure is "correct" — both are correct for their location.

The assessed value is not what you paid for the house or what it would sell for today. Assessors use their own methods — some look at recent sales of similar homes, some use income approaches for rental properties, and some use a cost approach based on construction and land value. These methods produce different numbers, and different assessors may value the same property differently.

Key Takeaways

  • Property tax is calculated by multiplying your home's assessed value by your local tax rate, and both numbers vary significantly by location.
  • Assessed value is determined by a government assessor using methods that may differ from your home's market price or purchase price.
  • Tax rates are set by local governments and school districts, not by a state or federal authority, so neighboring properties can have very different bills.
  • Some states cap how much assessed values can increase each year, while others reassess frequently, affecting how quickly your bill changes.
  • Homeowners can challenge their assessed value through a formal appeal process if they believe the assessor's number is too high.

How assessors determine your home's value

Assessors are government employees or contractors hired to estimate property values for tax purposes. They do not buy or sell houses — they estimate what a house would sell for under normal market conditions. The methods they use vary by state and county.

The most common approach is the sales comparison method. The assessor looks at recent sales of similar homes in your area — same size, age, condition, location — and adjusts for differences. If your house is 2,000 square feet and sold for $300,000 last year, and a similar house two blocks away sold for $310,000, the assessor might value yours at $305,000. This method works best in active markets where many homes sell regularly.

For rental properties and commercial buildings, assessors often use the income approach. They estimate how much rent the property generates, subtract operating costs, and calculate what price an investor would pay for that income stream. A building that generates $50,000 in annual net income might be valued at $625,000 if investors typically pay 12.5 times the net income.

The cost approach estimates what it would cost to rebuild the structure from scratch, then subtracts for age and wear. This method is useful for new construction or unusual properties where few comparable sales exist. An assessor might calculate that rebuilding your house would cost $200,000, add $100,000 for the land, then subtract $20,000 for the roof being 15 years old, arriving at $280,000.

Tax rates and who sets them

Your property tax rate is set by local governments — your city, county, and school district — not by your state or the federal government. Each of these bodies can impose its own rate on the same property. A single house might be taxed by a county government, a city government, a school district, and a special district for fire protection or water, each with its own rate.

Rates are usually expressed in one of two ways. Some jurisdictions state a percentage: "1.2% of assessed value." Others use a per-$1,000 figure: "$12 per $1,000 of assessed value," which is the same as 1.2%. A few use a per-$100 figure. The math is identical; only the presentation changes.

Rates vary dramatically. Some counties charge less than 0.5% of assessed value; others charge more than 2%. Within a single state, neighboring counties can differ by a factor of three or four. School districts within the same county can also have different rates. This is why property tax bills for similar homes can be vastly different depending on location.

Rates change when local governments vote to raise or lower them, usually through a public budget process. Some states require voter approval for rate increases; others allow governments to raise rates without a vote. A few states cap how much rates can increase in a single year. The rules depend on your state and local law.

How assessed values change over time

Once an assessor sets an initial value, it does not stay frozen. Most jurisdictions reassess properties regularly — some every year, some every three years, some every five years. The frequency depends on state law and local practice. When a reassessment happens, the assessor may raise or lower the value based on changes to the property or the market.

Some states impose assessment caps that limit how much a property's assessed value can increase in a single year, even if the market value rises faster. California's Proposition 13, for example, limits increases to 2% per year unless the property sells. Florida caps increases at 3% per year. These caps mean your tax bill grows slowly even if your home's market value jumps. Other states have no caps and reassess at current market value every year, so your bill can change significantly year to year.

When you sell your home, many states trigger a reassessment at the sale price. If you bought for $250,000 and the market rises so your home is now worth $350,000, you may not pay tax on $350,000 until you sell. Once you do, the new owner's assessed value resets to the sale price. This creates situations where neighbors with identical homes pay very different taxes because they bought at different times.

Some states also offer homestead exemptions that reduce assessed value for owner-occupied homes. An exemption might lower your assessed value by $50,000, which directly lowers your tax bill. Exemptions vary by state and sometimes by county. You typically must file a form with your assessor to claim one.

What affects your specific tax bill

Beyond assessed value and tax rate, several factors can change what you actually owe. Property classification matters: residential homes, commercial buildings, agricultural land, and vacant land often have different tax rates in the same jurisdiction. A commercial building might be taxed at 1.5% while a home is taxed at 1.0%.

Special assessments are additional charges for specific improvements that benefit your property. If your city builds a new sewer line and charges properties along the line for part of the cost, that appears as a separate line item on your bill. These are not property taxes but are often collected the same way.

Tax abatements or tax credits can reduce what you owe. Some jurisdictions offer abatements for historic homes, solar installations, or new construction. Some states offer credits for seniors, veterans, or people with disabilities. These are usually one-time filings and require documentation.

Your bill may also include charges for services that are not property tax — water, sewer, trash collection, or fire protection district fees. These appear on the same bill but are separate line items with their own rates. Understanding which charges are property tax and which are not helps you understand what you are actually paying for.

Comparing property tax across locations

If you are considering moving or comparing neighborhoods, property tax can be a significant factor. A $400,000 home might cost $4,000 per year in property tax in one location and $8,000 in another. Over 30 years, that is a $120,000 difference.

To compare, you need three pieces of information: the home's market price, the local assessed value (which may be lower due to caps or exemptions), and the local tax rate. You can find tax rates through your county assessor's office or your county tax collector's website. Many counties publish this information online. Assessed values are also public record and searchable on most county websites.

Be aware that a lower tax rate does not always mean lower taxes. A jurisdiction with a 0.8% rate but no assessment caps might tax a $400,000 home at $3,200 per year. A jurisdiction with a 1.2% rate but a 2% annual cap might tax the same home at $3,600 per year initially, but the bill grows slowly. Over time, the second location could become cheaper or more expensive depending on market appreciation.

How to find your property tax amount

Your property tax bill is sent by your county tax collector or assessor, usually once or twice per year depending on your state. The bill shows your assessed value, the tax rate, and the amount due. If you have not received a bill, you can find this information online through your county's website.

Most counties maintain searchable property records online. You can search by address or parcel number and see the assessed value, recent sales history, property details, and sometimes the tax bill itself. These databases are free and public. If you cannot find yours online, call your county assessor's office and ask for your assessed value and tax rate.

If you believe your assessed value is too high, you can file a formal challenge called an appeal or protest. The process and important date vary by state, but typically you must file within 30 to 60 days of receiving your bill. You will need to provide evidence — recent appraisals, comparable sales, or documentation of property damage — to support a lower value. Many counties offer informal review before a formal hearing.

Frequently Asked Questions

Why is my property tax bill different from my neighbor's if our houses look the same?

Your assessed values may differ because you bought at different times, your properties may have different features the assessor values differently, or you may have claimed different exemptions. Tax rates can also vary if you are in different school districts or special districts. Request both assessed values from your county assessor to compare.

Can I reduce my property tax bill?

You can challenge your assessed value if you believe it is too high, claim any exemptions you are may have access to to (homestead, senior, veteran, or disability exemptions depending on your state), or look for tax credits for improvements like solar panels. You cannot change the tax rate yourself, but you can attend local government meetings where rates are set.

What happens if I do not pay my property tax?

Your county can place a lien on your home, charge penalties and interest, and eventually foreclose and sell the property to recover the unpaid tax. The timeline varies by state but typically begins after 30 to 90 days of non-payment. If you cannot pay, contact your tax collector about payment plans or hardship programs.

Does my property tax include school funding?

In most states, yes. Your property tax bill includes a portion that goes to your local school district. The school district sets its own tax rate, which is added to your county and city rates. This is why school funding varies widely by location — wealthier areas with higher property values often generate more school funding per student.

How often does my assessed value change?

It depends on your state and county. Some reassess every year, some every three to five years, and some only when the property sells. Check your county assessor's website or call to find out the reassessment schedule in your area. Even if reassessment is infrequent, your tax bill can still change if tax rates change.