The Illinois State Constitution requires the state income tax rate to be the same for all taxpayers – currently at 4.95%. This makes it difficult for the Legislature to increase income tax rates because any rate increase affects all taxpayers (i.e., all voters).
The proposed Constitutional Amendment would repeal this important constitutional protection and give the Legislature unprecedented new authority to increase income tax rates on any group of taxpayers at will – including lower- and middle-income taxpayers and small business owners – and lock those new powers into our State’s Constitution. There would be no limit on the number of tax brackets that could be created and no limit on how high tax rates could be increased on groups of individual taxpayers. The day after the election, there would be nothing to prevent the Legislature from raising state income taxes on everyone.