The Illinois sales tax map runs from a 6.25% floor in rural downstate areas with no local add-ons to 10.25% in parts of Chicago, because cities, counties, and regional transit districts each layer their own percentages on top of the state rate at the point of sale.1Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 120 – Retailers’ Occupation Tax Act The combined rate at any given address depends on which of those jurisdictions you’re standing in, and it can shift from one side of a street to the other.
How the Layers Stack
Every retail sale of physical goods in Illinois starts with the 6.25% state Retailers’ Occupation Tax.1Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 120 – Retailers’ Occupation Tax Act That rate is the same everywhere. What varies is what gets added on top.
Home rule municipalities can impose additional sales tax in quarter-percent increments with no cap on how high they go.2Illinois Department of Revenue. Home Rule and Non-Home Rule Sales Taxes Non-home-rule municipalities can also add tax in quarter-percent increments but are capped at 1%. Counties and special transit districts pile on further layers. The total on your receipt is the sum of all overlapping jurisdictions at that address, which is why the same item bought ten miles apart can carry a noticeably different tax.
One structural quirk affects what the map covers: home rule and non-home-rule municipal sales taxes do not apply to titled or registered property like vehicles, watercraft, aircraft, and manufactured homes.2Illinois Department of Revenue. Home Rule and Non-Home Rule Sales Taxes Those local layers apply only to general merchandise. The map for a car purchase and the map for a couch purchase look different even at the same address.
Where Rates Run Highest
The northeastern corner of the state carries the heaviest sales tax burden because of the Regional Transportation Authority. The RTA covers six counties: Cook, DuPage, Kane, Lake, McHenry, and Will. In Cook County, the RTA adds 1% on general merchandise. In the other five collar counties, it adds 0.75%.3Illinois Department of Revenue. Mass Transit District Sales Tax Those transit taxes sit on top of the state rate and any city or county taxes, which is how Chicago’s combined rate reaches 10.25% for general merchandise. That is among the highest of any major U.S. city.
A similar overlay exists across the river from St. Louis. The Metro-East Mass Transit District imposes sales taxes in parts of Madison and St. Clair counties: 0.25% in Madison County and 0.75% on most goods in St. Clair County.4Illinois Department of Revenue. Mass Transit District – Metro-East Mass Transit (MED) Taxes and Regional Transportation Authority (RTA) Taxes Those rates are lower than the RTA zone but still push combined totals above what you’d find in rural parts of the state.
Where Rates Run Lowest
Rural downstate counties without transit districts or home-rule municipalities tend to have the lowest combined rates. Where no local tax applies beyond a minimal county increment, the total can hover near the 6.25% state floor. The difference between shopping in rural central Illinois and shopping in downtown Chicago can easily be 3 to 4 percentage points on the same purchase. For expensive items like appliances or furniture, that gap adds up fast.
Groceries, Drugs, and Medical Items
Not everything follows the general merchandise map. Qualifying groceries, prescription and over-the-counter medications, and medical appliances are taxed at a state base of 1% instead of 6.25%.5Legal Information Institute. Illinois Admin Code tit 86 140.126 – Taxation of Food, Drugs and Medical Appliances Local jurisdictions may add small increments, but the total stays well below the general rate, so where you shop matters much less for a pharmacy run than for a trip to a furniture store.
“Qualifying food” means groceries intended to be eaten off-premises. It does not include alcohol, soft drinks, candy, or prepared food sold for immediate consumption like hot deli items.5Legal Information Institute. Illinois Admin Code tit 86 140.126 – Taxation of Food, Drugs and Medical Appliances A cold sandwich packaged for takeout may qualify for the lower rate; the same sandwich heated up probably doesn’t.
Medical items taxed at the 1% rate include prescription drugs, over-the-counter medications, insulin, blood sugar testing supplies, syringes for diabetic use, and medical appliances designed for human use.5Legal Information Institute. Illinois Admin Code tit 86 140.126 – Taxation of Food, Drugs and Medical Appliances
Vehicles and Other Titled Property
Titled property follows a separate system. If you buy a vehicle from a private party rather than a dealer, you pay use tax calculated differently depending on the price. Vehicles purchased for under $15,000 are taxed based on their age using a flat schedule; those at $15,000 or above are taxed based on the purchase price. Motorcycles and ATVs bought privately carry a flat $25 tax. Transfers between certain family members drop to $15.6Illinois Department of Revenue. Use Tax Rates
Watercraft bought from a private party are taxed at 6.25% of the purchase price or fair market value, whichever is higher, with no trade-in allowance. Vehicles purchased from an out-of-state retailer that isn’t registered in Illinois are taxed at the combined rate for your location.6Illinois Department of Revenue. Use Tax Rates
Online and Out-of-State Purchases
Online shopping doesn’t let you escape the Illinois map. Since 2018, out-of-state retailers that generate $100,000 or more in cumulative gross receipts from sales into Illinois must register, collect, and remit Illinois sales tax.7Illinois General Assembly. Illinois Admin Code Section 150.803 – Wayfair Nexus That threshold includes both taxable and exempt sales, and remote sellers check it on a rolling quarterly basis against the prior 12 months.
Marketplace facilitators like Amazon, eBay, and Etsy bear the collection responsibility for sales made through their platforms. The rate charged matches the combined state-and-local rate at your delivery address, so the same location-based variation that applies in a brick-and-mortar store applies to your online order.
When you buy from a seller that doesn’t collect Illinois tax, you owe use tax yourself at the rate for your location. If your total use tax for the year is $600 or less, you can report and pay it on your individual income tax return (Form IL-1040); above $600, you file a separate Form ST-44.8Illinois Department of Revenue. What Is Use Tax?
The Back-to-School Holiday Changes the Map
Illinois runs a temporary sales tax holiday each summer that changes the picture for a short window. For 2026, qualifying items are taxed at a reduced state rate of 1.25% instead of 6.25% during the holiday period. Eligible purchases include clothing priced under $125 per item and school supplies like notebooks, pens, calculators, binders, and backpacks.9BillTrack50. IL HB4252 The holiday does not cover computers, cameras, cell phones, or clothing accessories. Art supplies, memory cards, and tablets don’t qualify either. Local taxes still apply during the holiday, so the rate doesn’t drop to zero.
Looking Up the Exact Rate for an Address
The Illinois Department of Revenue maintains a Tax Rate Database that includes the MyTax Illinois Tax Rate Finder, an online tool that returns the precise combined rate for any address in the state.10Illinois Department of Revenue. Tax Rate Database You enter a street address or nine-digit zip code, and the tool breaks the result into each component: how much goes to the state, the municipality, the county, and any transit district. It covers both origin-based and destination-based rates, which matters for businesses shipping goods across jurisdictions.
The tool also shows effective dates for recent rate changes, so you can verify whether a new local tax has kicked in. Home-rule cities adjust their rates without a cap, so checking the finder before a large purchase or before setting prices is the most reliable way to read the map at any specific point.