What is the use tax in Illinois?

Use tax in Illinois is a tax on the purchase of goods that are used, consumed, or stored in the state when sales tax has not been paid. It applies to items bought from out-of-state retailers or online purchases where no Illinois sales tax was collected. The use tax rate is generally the same as the state and local sales tax rates. Taxpayers are responsible for reporting and paying this tax when filing their state income tax returns.