INCOME TAX RATES Senate SponsorsSen. Kwame Raoul 1/8/2013SenateSession 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. 2/8/2011SenateFiled with Secretary 2/8/2011SenateReferred to Assignments 3/3/2011SenateAssigned to Executive 3/29/2011SenateTo Executive Subcommittee on Constitutional Amendments 1/8/2013SenateSession Sine Die