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Scam Alert: Fake Texts and Websites Impersonating IDOR

Be alert for fraudulent messages or websites attempting to steal your banking information, login credentials, or credit card details. The Illinois Department of Revenue (IDOR) will never request personal or financial information via text message. To confirm official communications or contact details, always visit https://tax.illinois.gov.

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Business Income Tax Rates for Prior Years

Tax Year Ending Corporate Rate Trust and Estate Rate
2015 through June 30, 2017 5.25% 3.75%
2011 through 2014 7.00% 5.00%
1997 through 2010 4.80% 3.00%