Illinois State Tax Guide

Everything you need to know about taxes in the Prairie State.

Unlike other states that have a progressive income taxation structure, Illinois has a flat income tax of 4.95%. In other words, residents pay that same rate no matter how much money they make. Sales and property taxes in Illinois, however, are some of the highest in the United States.

According to the Tax Foundation, Illinois’ individual income tax rate is 4.95%. The state and local individual income tax collections per capita is $1076 (ranked 25th in the US). The state and local tax burden is 11% (ranked 5th in the US).

Important forms and publications for Illinoiscan be found at www2.illinois.gov/rev/forms.

Illinois Tax Forms

Illinois Income Tax Calculator

If you’d like to estimate your individual income tax for the state of Illinois, check out this Illinois income tax calculator.

Contact Information for the Illinois State Tax Office

To contact the Illinois Department of Revenue by email for any tax-related inquiries, visit this page. To receive assistance by phone, call (800) 732-8866 or (217) 782-3336. Representatives are available Monday through Friday, 8 am - 5 pm.



Tax Help for Illinois Residents

If you’re an Illinois resident looking to minimize your state tax liability, or if you’re considering moving into or out of Illinois and have questions about establishing residency and/or tax nexus, we have the expertise to assist you. Contact our office for more information today

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