Illinois Sales Tax Calculator 2026
Illinois's state sales tax rate is 6.25%, with an average local rate of 2.73% and an average combined rate of 8.98%. Enter a price to add tax or reverse a tax-included total.
Illinois Sales Tax Calculator
Average combined rate in Illinois is 8.98%; your exact rate depends on the city and county. Max local rate observed: 4.75%.
Illinois sales tax rate breakdown (2026)
| Component | Rate |
|---|---|
| State rate | 6.25% |
| Average local rate | 2.73% |
| Average combined rate | 8.98% |
| Maximum local rate | 4.75% |
City, county and special-district rates vary and are population-weighted in the average. Verify the exact rate for your sale location with the Illinois Department of Revenue.
Economic nexus for online sellers
Remote sellers establish economic nexus in Illinois at $100,000 in annual sales (no transaction count). $100,000 only. The 200-transaction threshold was removed Jan 1, 2026; the 1% grocery tax also ended.
Frequently asked questions
What is the sales tax rate in Illinois?
The state rate is 6.25%. Local governments add an average of 2.73%, so the typical combined rate is about 8.98%.
Do I have to collect sales tax as an out-of-state seller?
Remote sellers establish economic nexus in Illinois at $100,000 in annual sales (no transaction count). $100,000 only. The 200-transaction threshold was removed Jan 1, 2026; the 1% grocery tax also ended. Once you cross the threshold you generally must register and begin collecting on sales delivered into Illinois.
How is tax calculated on a sale?
Multiply the pre-tax price by the combined rate (state + local). For example, a $100 sale at the average 8.98% rate carries $8.98 of tax, for a total of $108.98.
Selling across several states?
Use the all-state calculator to add or reverse sales tax for any of the 50 states + DC, and compare marketplace fees with our other free seller tools.
Open the US sales tax calculator