Illinois Sales Tax Calculator

What Is the Sales Tax Rate in Illinois?

Illinois charges a 6.25% state sales tax on most purchases. On top of that, cities, counties, and special districts each add their own local rate, and those add-ons vary widely across the state. The statewide average combined rate lands close to 8.9%, but the number you actually pay depends heavily on where you're standing at checkout.

USACalculator built this Illinois version because the rate that matters is the one tied to your specific address, not just the state's base number. Pick your city below and the calculator applies a realistic combined rate automatically.

Using the Calculator

Illinois is preselected in the dropdown with a representative combined rate. Enter the price of what you're buying, or swap in your own city's exact combined rate if you know it, and the total updates immediately. Planning a bigger purchase, like a vehicle? Illinois generally taxes those through separate use tax rules rather than the general sales tax rate, so it's worth checking the details before you finalize a budget with our Illinois Car Loan Calculator.

How the Calculation Works

The formula is simple: multiply your purchase price by the combined tax rate to get the tax owed, then add that to the original price for your total. Illinois generally taxes at the rate tied to the seller's location for in-state sellers, which is part of why two stores a few miles apart can post different tax totals on a receipt.

Illinois-Specific Sales Tax Information

State Sales Tax

The base rate is 6.25% statewide, set by the Illinois Department of Revenue and applied to most tangible goods.

Local Sales Tax

Cities, counties, and special districts can each add their own local rate on top of the state base. Because these layers stack independently, the combined rate can shift noticeably even between neighboring towns.

Chicago and Cook County

Chicago carries one of the highest combined sales tax rates in the country. Sitting inside Cook County, the city stacks its own local rate on top of the county's and the state's, with the combined total commonly cited around 10% to 10.25%. That's a meaningful jump above the statewide average, so shoppers and business owners in the Chicago area should budget for the higher end.

Tax Treatment of Groceries and Other Items

Illinois treats qualifying groceries and certain other items differently from general merchandise, typically at a reduced rate compared with the standard sales tax. Because category rules can be detailed, check current guidance from the Illinois Department of Revenue if you need the exact rate for a specific type of purchase.

Example Calculation

Say you're buying a $250 item in Chicago, where the combined rate runs close to 10.25%. The math looks like this:

Buy the same item in a smaller Illinois town with a lower local add-on, and the total drops noticeably, even though the state's 6.25% base never changes.

Why Illinois Residents Use This Calculator

Shoppers use it to check a receipt against what they expected to pay, especially in the Chicago area where the rate runs higher than most people assume. Small business owners use it to quote accurate out-the-door prices to customers across different counties. People budgeting a big purchase run the numbers here first, then move on to our Illinois Paycheck Calculator to see how it fits into the rest of their monthly budget.

Common Mistakes to Avoid

• Assuming the whole state pays Chicago's higher rate. Many smaller towns charge closer to the statewide average.
• Forgetting that vehicle purchases generally follow separate use tax rules rather than the general sales tax rate.
• Treating every food purchase the same, when groceries and prepared food can fall under different rules.
• Assuming a single statewide rate exists at all, when the real number always depends on your specific address.

Frequently Asked Questions

What is the Illinois sales tax rate?

The state rate is 6.25%. Local add-ons from cities and counties bring the average combined total to around 8.9% statewide.

What is the sales tax rate in Chicago?

Chicago's combined rate is commonly cited around 10% to 10.25%, among the highest big-city rates in the country.

Why is Chicago's sales tax so much higher than the state rate?

Chicago sits in Cook County, and both the city and county add their own local rates on top of the state's 6.25% base.

Does Illinois tax groceries?

Qualifying groceries generally get a reduced rate compared to general merchandise. Check current state guidance for exact category rules.

Does Illinois charge sales tax on online purchases?

Yes, when the seller meets the state's economic nexus threshold, the same tax applies as it would in a physical store.

How is sales tax calculated on a vehicle purchase in Illinois?

Vehicles generally fall under separate use tax rules rather than the general sales tax rate. Confirm the exact schedule with the state before budgeting.

Why does the combined rate vary so much across Illinois?

Because cities, counties, and special districts each set their own local add-on, so totals differ from one address to the next.

Is Illinois sales tax higher than most states even though it also has an income tax?

Illinois uses both income tax and sales tax to fund government, unlike states such as Texas that lean almost entirely on sales tax with no income tax at all.

Are services taxed in Illinois?

Tangible goods are taxed more broadly than services, though some specific services are taxable. Confirm treatment for a specific service with the state.

How accurate is this Illinois sales tax calculator?

It uses current published state and average local rates for a close estimate. Confirm your exact rate for large purchases.

Related Calculators

Pair this with the Illinois Paycheck Calculator to see your full take-home picture, or the Illinois Car Loan Calculator when vehicle use tax applies instead of the general rate. Explore more free tools at USACalculator.

Sources: Illinois Department of Revenue. Figures reviewed for 2026. This calculator provides an estimate for planning purposes and is not tax advice — confirm exact rates for your address with the Department of Revenue.