Illinois use tax is what you owe the state when you buy tangible personal property for use in Illinois and the seller didn’t collect Illinois sales tax at checkout. The rate matches the sales tax: 6.25 percent on general merchandise and 1 percent on qualifying food, prescription and nonprescription drugs, and medical appliances. The obligation is on you as the buyer, whether you ordered something from a small out-of-state website, drove to Indiana for a sofa, or bought a used boat from a private seller in Wisconsin.
When You Actually Owe It
Most of the large online retailers now collect Illinois tax at checkout, so for everyday Amazon-type purchases, use tax usually isn’t something you have to think about. The situations where it still comes up:
- Buying from smaller online or catalog sellers that fall below Illinois’s collection threshold for remote sellers.
- Driving to another state, buying furniture, electronics, or appliances in person, and bringing them home.
- Buying a car, boat, or aircraft from a private party in another state.
- Ordering goods from a foreign seller that doesn’t collect any Illinois tax.
The common thread is simple. If a taxable item ends up in Illinois for your use and no Illinois sales tax was collected, use tax fills the gap. The legal basis is the Use Tax Act at 35 ILCS 105.
Rates, and What’s Outside the Tax
General merchandise is taxed at 6.25 percent. That covers most tangible personal property: electronics, clothing, furniture, household goods, tools, equipment. Qualifying grocery food, prescription and nonprescription drugs, and medical appliances are taxed at 1 percent. Restaurant meals and hot prepared food don’t get the reduced rate.1Illinois Department of Revenue. PIO-101, Illinois Sales and Use Tax Matrix
For items that have to be titled or registered with an Illinois agency, like vehicles, watercraft, and aircraft, the total rate is destination-based and adds local taxes on top of the state portion. The combined rate depends on the exact address where the item will be titled, and the Illinois Department of Revenue publishes a Tax Rate Finder for lookups.
Digital downloads are a notable gap in the tax base. Electronically delivered ebooks, music files, and digital newspapers are not treated as tangible personal property under Illinois rules and are not subject to state sales or use tax.2Illinois General Assembly. Illinois Administrative Code Title 86 Section 130.2005 Chicago imposes its own amusement tax on some streaming services, but that is a separate city tax and not part of the state use tax.
Credit for Tax Paid to Another State
If you already paid sales or use tax to another state on the same purchase, Illinois gives you a dollar-for-dollar credit, capped at the Illinois rate. Pay 4 percent in another state on an item that would be taxed at 6.25 percent here, and you owe Illinois the 2.25 percent difference. If the other state charged more than the Illinois rate, you owe nothing additional, but Illinois won’t refund the overage.3Illinois Department of Revenue. Use Tax for Individuals – Questions and Answers
How Individuals Report and Pay
For general merchandise, how you report depends on how much use tax you owe for the year.
If your annual use tax is $600 or less ($1,200 if married filing jointly), you can report it directly on your Illinois income tax return, Form IL-1040, in the “other taxes” section. It’s due with your income tax by April 15 of the following year.4Illinois Department of Revenue. Step 7 – Other Taxes
If you owe more than that, you have to file Form ST-44, the Illinois Use Tax Return. When one large purchase pushes you over the threshold, the return is due by the last day of the month following the month of the purchase.3Illinois Department of Revenue. Use Tax for Individuals – Questions and Answers The doubled threshold for joint filers is easy to miss; it genuinely is $1,200 before Form ST-44 becomes necessary.4Illinois Department of Revenue. Step 7 – Other Taxes
Vehicles, Boats, and Aircraft Follow a Separate Track
Titled items don’t go on your IL-1040 or on ST-44. Each category has its own return, and the clock is tighter.
- Vehicle bought from a dealer: file Form RUT-25 within 30 days of the purchase date or the date you bring the vehicle into Illinois, whichever applies.5Illinois Department of Revenue. Illinois Tax Requirements for Cars, Trucks, Vans, Motorcycles, ATVs
- Vehicle bought from a private party: file Form RUT-50 within 30 days of the purchase.5Illinois Department of Revenue. Illinois Tax Requirements for Cars, Trucks, Vans, Motorcycles, ATVs
- Watercraft and aircraft: file Form RUT-75 within 30 days of bringing the item into Illinois.3Illinois Department of Revenue. Use Tax for Individuals – Questions and Answers
- Leased vehicle: the right form is RUT-25-LSE.3Illinois Department of Revenue. Use Tax for Individuals – Questions and Answers
The 30-day windows are firm, and the penalties for missing them stack up fast on a big-ticket purchase.
If You’re a Business
A business that buys supplies, equipment, or other tangible property from out-of-state vendors for Illinois use has an ongoing use tax obligation. If you’re already registered with the Department of Revenue as a retailer or service provider, you report the tax on your own purchases in the dedicated section of Form ST-1, the Sales and Use Tax and E911 Surcharge Return, on your regular monthly or quarterly schedule.6Illinois Department of Revenue. ST-1 Instructions
If you aren’t registered, say you’re a professional services firm making a one-time equipment purchase, you file Form ST-44, the same return individuals use. A business that regularly buys from out-of-state suppliers should register rather than filing one-off returns.
Penalties, Audits, and Voluntary Disclosure
Use tax is subject to the same Uniform Penalty and Interest Act that governs other Illinois taxes. The late-filing penalty is 2 percent of the tax due, capped at $250; if you still haven’t filed 30 days after the Department sends you a notice, an additional penalty applies, the greater of $250 or 2 percent of the tax shown, up to $5,000.7Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 735 – Uniform Penalty and Interest Act
Late payment is 2 percent if you pay within 30 days of the due date, 10 percent after that, and 20 percent if the tax is still unpaid when the Department opens an audit or investigation. Interest runs on top. For a titled-item return where no tax is actually due, say a vehicle received as a gift, failing to file still carries a flat $100 penalty.7Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 735 – Uniform Penalty and Interest Act
How far back the Department can go depends on whether you filed. If you filed a return, the standard assessment period is generally three years. If you never filed, there is no time limit, though showing reasonable cause caps the window at six years from the original due date. Fraud has no time limit at all.7Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 735 – Uniform Penalty and Interest Act
If you come forward on your own before the Department contacts you, the voluntary disclosure process limits the lookback to four years.7Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 735 – Uniform Penalty and Interest Act For a business that’s realized it has been buying out-of-state inventory or equipment for years without paying use tax, disclosing voluntarily is usually far cheaper than waiting for an audit notice.