INCOME TAX RATES Senate SponsorsSen. Kwame Raoul 1/10/2017SenateSession Sine Die ILCON Art. IX, Sec. 3 Proposes to amend the Revenue Article of the Illinois Constitution. Removes a provision that provides that a tax on income shall be measured at a non-graduated rate. Provides that, for any income tax imposed upon corporations, the rate shall not exceed the weighted average rate imposed on individuals by more than a ratio of 8 to 5. Effective upon being declared adopted. 2/11/2015SenateFiled with Secretary 2/11/2015SenateReferred to Assignments 8/4/2015SenateAssignments Refers to Executive 4/14/2016SenateTo Subcommittee on Constitutional Amendments 4/14/2016SenateWaive Posting Notice 4/19/2016SenatePostponed - Subcommittee on Constitutional Amendments 4/19/2016SenatePostponed - Executive 1/10/2017SenateSession Sine Die