Understanding the intricacies of Illinois sales tax on a car purchase is crucial for any vehicle buyer in the Prairie State. This tax, often referred to as a “use tax” when the vehicle is purchased out-of-state and brought into Illinois, can significantly impact the overall cost of acquiring a new or used automobile. Navigating these regulations ensures compliance and avoids unexpected financial burdens.
Understanding the Basics of Illinois Vehicle Sales Tax
Illinois imposes a sales and use tax on the retail sale of tangible personal property, which includes motor vehicles. The tax rate is determined by the location where the vehicle is purchased or, if purchased out-of-state, where it will be primarily used. This rate is a combination of the state sales tax rate and any applicable local taxes.

State Sales Tax Rate
The standard Illinois state sales tax rate is 6.25%. This rate applies to most retail transactions, including the sale of vehicles. However, it’s important to note that this is just the base rate, and additional local taxes can be added.
Local Sales Taxes
In addition to the state rate, counties, municipalities, and other local taxing districts within Illinois can impose their own sales taxes. These local rates vary considerably across the state. For example, a vehicle purchased in Chicago will likely be subject to a higher combined sales tax rate than one purchased in a smaller rural town.
The Illinois Department of Revenue provides resources to help identify the specific tax rates for different locations. It is highly recommended that buyers verify the exact combined rate for their intended place of registration and use before finalizing a purchase.
How the Tax is Calculated
The Illinois sales tax on a car is calculated based on the “selling price” of the vehicle. This generally refers to the total amount paid by the buyer, including any options, accessories, and even delivery charges, but before any trade-in allowance.
Example: If you purchase a car for $30,000 and the combined state and local sales tax rate in your area is 7%, the sales tax would be:
$30,000 (Selling Price) * 0.07 (Tax Rate) = $2,100 (Sales Tax)
The total cost of the vehicle would then be $30,000 + $2,100 = $32,100.
The Role of the Use Tax for Out-of-State Purchases
A particularly important aspect of Illinois vehicle sales tax is the “use tax.” This tax applies when an Illinois resident purchases a vehicle from an out-of-state dealer or private seller and brings it into Illinois for use. The purpose of the use tax is to ensure that Illinois residents pay the same amount of tax on a vehicle as if they had purchased it within the state.
When Use Tax Applies
You are generally required to pay Illinois use tax if:
- You purchase a vehicle outside of Illinois.
- You are an Illinois resident.
- You bring the vehicle into Illinois for use, storage, or consumption.
The use tax rate is the same as the sales tax rate for the location where the vehicle will be registered and primarily used in Illinois. This means you will pay the combined state and local tax rate relevant to your Illinois address, even if you bought the car in a state with a lower or no sales tax.
Credit for Out-of-State Sales Tax Paid
A crucial provision is that if you have already paid sales tax in another state on the vehicle purchase, you are entitled to a credit for the amount of tax paid against the Illinois use tax liability. However, the credit cannot exceed the amount of Illinois use tax due.
Example: You purchase a car in a state with a 5% sales tax and paid $1,500 in tax on a $30,000 vehicle. You then bring the car to Illinois, where the combined state and local use tax rate is 7%. The Illinois use tax would be $2,100. You would receive a credit for the $1,500 paid in the other state, leaving you to pay $600 ($2,100 – $1,500) in Illinois use tax. If the other state’s tax had been higher than the Illinois tax, you would owe nothing further to Illinois.
Exemptions and Special Circumstances
While the sales and use tax applies broadly, there are specific exemptions and circumstances that can affect the tax liability on vehicle purchases in Illinois.
Trade-In Vehicles

In Illinois, the value of a trade-in vehicle is typically deducted from the selling price of the new vehicle before sales tax is calculated. This can significantly reduce the overall tax burden.
Example: You are buying a new car for $35,000 and have a trade-in vehicle valued at $10,000. The taxable selling price of the new car becomes $25,000 ($35,000 – $10,000). If the tax rate is 7%, the sales tax would be $1,750 ($25,000 * 0.07), a saving of $700 compared to taxing the full $35,000.
New Residents
Individuals moving to Illinois must register their vehicles within 30 days of establishing residency. They will be subject to the Illinois use tax on any vehicle they bring into the state, with credit given for sales tax paid in their previous state of residence.
Vehicle Donations
Vehicles donated to certain qualified charitable organizations and subsequently sold by those organizations may be exempt from sales tax. The specifics of these exemptions are detailed by the Illinois Department of Revenue.
Sales to Government Entities and Certain Exempt Organizations
Sales of vehicles to federal, state, and local government agencies are generally exempt from sales tax. Additionally, sales to certain not-for-profit organizations that have been granted sales tax exemption status by the state may also be exempt under specific conditions.
Motor Vehicles for Resale
Businesses that purchase vehicles for the purpose of resale, such as licensed automobile dealerships, are typically exempt from paying sales tax on those purchases. They will, however, collect sales tax from the end consumer when the vehicle is sold.
Registration and Titling: Where Taxes Are Collected
In Illinois, sales and use taxes on vehicles are generally collected at the time of vehicle registration and titling with the Illinois Secretary of State’s office. When you bring your vehicle to the Illinois Secretary of State (or an authorized third-party provider) to obtain your license plates and title, you will be required to present proof of payment of the sales or use tax.
Proof of Purchase
For in-state purchases, the dealership typically handles the remittance of sales tax. For out-of-state purchases, individuals will need to provide documentation of the purchase price and any sales tax paid to the other state.
“Drive-Away” Permits
If you purchase a vehicle out-of-state and need to drive it to Illinois, you may need a temporary “drive-away” permit. These permits allow you to legally transport the vehicle, and the associated taxes and fees will need to be addressed.
Importance of Accurate Reporting
Accurate reporting of the vehicle’s purchase price and any taxes paid is crucial. Underreporting the selling price or misrepresenting the circumstances of the purchase can lead to penalties, interest, and back taxes. The Illinois Secretary of State’s office works in conjunction with the Department of Revenue to ensure tax compliance.
Staying Informed and Avoiding Pitfalls
The landscape of sales and use tax can be complex, and tax laws are subject to change. For the most up-to-date and accurate information, it is always best to consult official resources.
Illinois Department of Revenue (IDOR)
The IDOR website is the primary source for information on Illinois sales and use taxes. They provide official publications, forms, and tax rate information. Specific publications like “Sales and Use Tax on Motor Vehicles” offer detailed guidance.
Illinois Secretary of State
The Secretary of State’s office oversees vehicle registration and titling and is where taxes are typically collected. Their website also contains valuable information regarding the process and requirements for new and used vehicle purchases.

Professional Advice
For complex transactions, significant purchases, or if you are uncertain about your specific tax obligations, consulting with a tax professional or an attorney specializing in tax law is highly recommended. They can provide personalized advice and ensure you are meeting all legal requirements.
By understanding the fundamental principles of Illinois sales tax on cars, including the application of use tax for out-of-state purchases, the impact of trade-ins, and potential exemptions, vehicle buyers can navigate the process with confidence and avoid costly mistakes. Diligent research and attention to detail are key to a smooth and compliant vehicle acquisition in Illinois.
