Taxation Commons^™

Comparison Of Illinois Individual Income Tax Amounts With Surrounding States--Who Wins, Who Loses?, Mark R. Williams

Scholar Week 2016 - present

In July 2017 the Illinois General Assembly essentially made permanent the 66 2/3% tax rate increase which was originally enacted in January 2011 but which had sunset after 2014. Since Illinois is a flat tax state, there were some who argued that the Illinois tax rate, even after the increase in 2011 and again in 2017, was lower than surrounding states implying that Illinois taxpayers were still relatively better off than residents of surrounding states. This study provides a brief history of the Illinois individual income tax. This study also compares the individual income tax amounts for Illinois and six …