Glossary

Ad valorem tax

Ad valorem tax is levied based on the assessed value of the assets, goods, or services being taxed. U.S. state and municipal governments charge it, and it’s one of the primary sources of revenue for both state and municipal governments. Property tax is the most common form of ad valorem tax.


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What is ad valorem tax?

Ad valorem tax is imposed depending on the monetary value of a property or a transaction. Perhaps an easy way to remember its definition is to think of the Latin phrase “ad valorem,” meaning “according to value.” This tax is levied as a percentage of the assessed value of the property or product, also referred to as the fair market value, defined as the value of property as objectively determined by the marketplace.

The most common example of ad valorem tax is property tax levied on real estate and personal property. Other examples include sales taxes and value-added taxes (VAT). Imposed by state and municipal governments, ad valorem taxes are an important source of revenue for those government entities.

What are the types of ad valorem tax?

There are three types of ad valorem tax: property tax, value-added tax (VAT), and sales tax:

  • Property tax. These taxes are levied on a taxpayer’s personal and commercial property. Real property or real estate — buildings, land, etc. — and personal property — motor vehicles, business equipment, etc. — fall under the definition of property.

    Ad valorem property taxes are applied to taxpayers in all 50 states and the District of Columbia. States usually levy a tax on personal property but not real property, while local governments — counties, cities, and school districts — typically levy tax on real property. In 2021, state and local governments collected a combined $630 billion in revenue from property taxes, which accounted for 15% of general revenue.
  • VAT. Value-added tax is an indirect tax charged on the value added at each stage of the supply chain. In producing a good or service, each business along the production chain receives a tax credit for the VAT tax they’ve paid, with the end consumer ultimately paying the tax.

    For instance, if a product costs $70 and has a 10% VAT, the consumer pays $77 to the retailer. The retailer keeps $70 and remits $7 to the government.
  • Sales tax. This tax is charged as a percentage of the retail cost and is paid at the point of purchase for goods or services. The seller collects the sales tax from the end consumer at the time of sale and forwards the levy to the proper taxing authority.

    Sales tax is levied at the national, state, and municipal levels. The sale tax rates vary depending on location. Local sales taxes are collected in 38 states, and statewide taxes are collected in 45 states and the District of Columbia. The five states with the highest average combined state and local sales tax rates are Louisiana (9.56%), Tennessee (9.55%), Arkansas (9.45%), Washington (9.38%), and Alabama (9.29%).

    Oregon, Montana, Delaware, and New Hampshire do not have state or local sales tax. Alaska does not have a statewide sales tax, but localities can impose local sales taxes.

What is the difference between ad valorem tax and ad valorem tariff?

While ad valorem tax is based on the monetary value of a property or transaction, an ad valorem tariff is a tax on foreign goods imported from another country, calculated as a fixed percentage of the product's value. For instance, if an imported item is valued at $500 and the tariff rate is 5%, the charge would be $25.

When the government imposes these tariffs, they can lead to higher prices for imported goods in the U.S. market, causing consumers to pay more for those items.

What are ad valorem taxes based on?

Ad valorem taxes are determined by the assessed value of the assets, goods, or services being taxed, meaning the taxpayer pays a specific amount based on that value.     

For example, property tax is levied on personal property and real estate. The taxation is based on the fair market value of the underlying asset.

Ad valorem tax can be charged at the time of a transaction; however, it can also be calculated annually.


How do you calculate ad valorem tax?

Calculating ad valorem tax varies depending on whether it is property tax, value-added tax (VAT) tax, or sales tax:

  • Property tax. Property taxes are calculated by multiplying the property's assessed value by the millage rate. The estimated value is the tax assessor's annual determination of the property's fair market value. The millage rate represents the amount of tax per $1,000 of valuation, where one mill equals 1/1,000 of a dollar.
    If you know the assessed value of your property and the tax levy rate, you can calculate the amount of tax. For example, if real estate property has an assessed value of $150,000 and the levy rate is $9.41 per thousand dollars of value, the tax amount due is $1,411.50.

    There are a few exemptions, which typically include property owned by religious entities, governments, and nonprofit groups. These types of properties are not subject to property tax.

    As it relates to personal property tax, it is usually calculated based on the value of the underlying property and charged as a percentage of that value. The types of property taxed and the tax rates will vary depending on location.

    For instance, in Washington State, most personal property owned by individuals is exempt from the tax. However, personal property tax is due on most property businesses use, including their assets and supplies. Inventory held for sale is excluded. For those who must pay personal property tax in the state, it is generally levied at the same rate as real property, such as buildings, land, etc.

  • VAT tax. Calculating VAT involves a straightforward process. In the production or purchase of goods and services, businesses at each stage of the supply chain receive a tax credit for the VAT they have already paid, which helps avoid double taxation. Ultimately, the end consumer pays the total VAT amount, including what was paid by previous businesses in the supply chain.

    To further illustrate, consider the following example with a 10% VAT tax assessed at each stage of the process.

    A toy manufacturer buys raw materials for $10, which includes a 10% VAT tax. Once the parts are manufactured, a toy assembler buys them for $12, which carries a $2 VAT tax. The manufacturer receives $12; of that amount, they pay $1 to the government. The manufacturer pays only $1 to the government and keeps the other $1 as a reimbursement for the VAT tax they paid to acquire the raw materials.

    This process continues throughout each stage of the production or purchase. The tax paid at each phase is calculated by deducting the VAT already paid in the prior stage of production or purchase.

    The end consumer then pays the entire VAT tax paid by the other businesses in the prior stages.

  • Sales tax. This tax is charged as a percentage of the retail cost; the rates vary depending on location. It is levied at the national, state, and municipal levels.
    For instance, Illinois imposes a 6.25% state sales tax rate, a max local sales tax rate of 4.75%, and has an average combined state and local sales tax rate of 8.86%. Meanwhile, Nevada levies a 6.85% state sales tax rate, a 1.53% max local sales tax rate, and has an average combined state and local sales tax rate of 8.24%.

Who levies ad valorem tax?

State and municipal governments levy ad valorem taxes, which are an important source of revenue for those entities.

States usually levy a tax on personal property but not real property. Local governments — counties, cities, and school districts — typically levy taxes on real property.


How do you determine ad valorem values?

Determining ad valorem values is typically based on a tax assessor's annual determination of fair market value. Usually, a property appraiser employed by the county taxing authority makes this assessment.

The appraiser working for the taxing authority determines the property's value by considering several criteria. These include:

  • The purpose of the underlying property
  • Comparable market data
  • The cost and depreciation of underlying property
  • For business property, how much in estimated annual net income is generated by the business property

Is ad valorem tax deductible?

In short, ad valorem tax is deductible. However, there are limitations. The state and local tax (SALT) deduction enables some taxpayers who itemize to deduct up to $10,000 — $5,000 if married, filing separately — of property, sales tax, or income taxes they have already paid to state and local governments. It is important to note that this limit or “cap” applies to tax years 2018 to 2025. Unless extended, the SALT cap will expire after 2025.

Taxpayers who choose to deduct state and local sales taxes paid during the year are not permitted to deduct state and local income taxes also; they must choose one or the other, but not both.

Rather than requiring taxpayers to keep all their receipts for sales tax deductions, the IRS has an online Sales Tax Deduction Calculator to help calculate the amount of state and local general sales tax to claim when itemizing deductions.

According to the IRS instructions, eligible sales tax deductions include:

  • Food, clothing, and medical supplies
  • Motor vehicles

As it relates to property taxes, there are some limitations. According to the IRS tax information, some nondeductible expenses include:

  • Homeowner's or fire insurance premiums
  • Title insurance
  • Mortgage insurance premiums
  • The cost of utilities like water and electricity
  • Homeowner’s or condo association fees
  • Wifi or Internet service

What is a non-ad valorem assessment?

A non-ad valorem assessment is a fee charged for specific services or benefits provided to a property, such as waste collection and disposal, fire protection, or sewer services. This fee is calculated based on the cost of the projects and the benefits they provide. Although it is not a tax, it appears on the property tax bill.


This information was last updated on 10/09/2024.

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