Additionally, researchers highlighted the fact that Illinois has the fifth most regressive tax system in the nation, according to a separate study recently issued by the Institute on Taxation and Economic Policy. The analysis showed that the poorest Illinois residents currently pay almost three times more in taxes as a percent of their income compared to the richest people in the state.
Related Reading
February 9, 2026
What Did 2025 State Tax Changes Mean for Racial and Economic Equity?
Mentioned Locations
Illinois