Illinois Sales Tax Calculator 2025

Illinois's average combined sales tax rate is 8.94% in 2025 — made up of a 6.25% state rate plus an average 2.69% local rate. On a $100 purchase that works out to about $8.94 in sales tax, for a total of $108.94. Because local rates vary by city and county, your exact rate at the register may be a little higher or lower than this average. Groceries taxed at a reduced 1% rate (state grocery tax phasing out in 2026). Use the calculator above to compute the tax on any amount, or switch to reverse mode to extract the tax from a tax-included total.

In Illinois, groceries are taxed and clothing is taxed. Groceries taxed at a reduced 1% rate (state grocery tax phasing out in 2026). Prepared food and restaurant meals are generally taxable even where unprepared groceries are exempt. Because exempt categories are taxed at $0 (or a reduced rate in some states), the combined 8.94% rate this calculator applies will overstate the tax on those specific items — apply it only to taxable goods. For the precise treatment of a particular product, consult the Illinois department of revenue.

To calculate sales tax, multiply the pre-tax price by the combined sales tax rate and add it to the price: Total = Price × (1 + rate). For Illinois at 8.94%, a $50 item costs $54.47 with $4.47 in tax. To work backward from a tax-included total — a reverse sales tax calculation — divide the total by (1 + rate): Net = Total ÷ (1 + rate). This is useful for separating the tax on a receipt for expense reports or bookkeeping. The calculator above does both: choose "Add tax to amount" for a pre-tax price, or "Extract tax from total" to recover the price and tax from a tax-inclusive amount.

Yes, in almost all cases. Since the 2018 Supreme Court decision in South Dakota v. Wayfair, Illinois can require out-of-state online sellers to collect sales tax once they cross an economic-nexus threshold (commonly $100,000 in sales or 200 transactions). Major retailers and marketplaces like Amazon, eBay, and Etsy now collect Illinois's sales tax automatically based on your shipping address. If a seller doesn't collect, you may owe use tax to your home state. For purchases shipped to Illinois, expect the combined rate of about 8.94% to apply at checkout.

Sales tax holidays are temporary periods — usually a weekend — when a state suspends sales tax on certain goods such as clothing, school supplies, or emergency-preparedness items, subject to per-item price caps. About 17 states hold at least one each year. Check the Illinois department of revenue for the current year's dates, eligible categories, and price limits before timing a large purchase, since the rules change annually and savings depend on the 8.94% rate being waived.