Chicago, Illinois Sales Tax Calculator
Chicago has a combined sales tax rate of 10.250% — meaningfully higher than the Illinois statewide average of 8.86%. Among the highest big-city rates in the country: 6.25% state + 1.75% Cook County + 1.25% Chicago + 1% RTA transit.
Sales tax in Chicago
The 10.250% you pay at a Chicago register is made up of 6.25% state tax plus roughly 4.000% in local taxes — a combination of county, city, and special-district levies. Among the highest big-city rates in the country: 6.25% state + 1.75% Cook County + 1.25% Chicago + 1% RTA transit.
That's higher than the Illinois average of 8.86%. Most large Illinois cities run above the state average because urban areas tend to layer transit taxes, special improvement districts, and arena/stadium taxes on top of the state and county base.
Illinois taxes groceries at a reduced state rate of 1.00%, but local taxes generally still apply at the full local rate.
For exact tax on a transaction at a specific Chicago address, use the Illinois Department of Revenue's lookup or a tool like Avalara. Rates can vary block-by-block when special tax districts cover part of the city.