Chicago sales tax details The minimum combined 2025 sales tax rate for Chicago, Illinois is 10.25%. This is the total of state, county, and city sales tax rates. The Illinois sales tax rate is currently 6.25%. The Chicago sales tax rate is 1.25%.
You can register electronically using MyTax Illinois, available at mytax.illinois. On the MyTax Illinois homepage, click “Register a New Business (Form REG-1).” Note that processing time for a registration application submitted through MyTax Illinois is approximately one to two business days.
Chicago has a combined sales tax rate of 10.25%. In Illinois, the sales tax rate can be made up of three different sales tax rates: The Illinois state sales tax rate: 6.250% A Cook County sales tax rate: 2.750%