State income tax · Illinois
Illinois income tax rates
Illinois's income tax on wages: the rate structure, the brackets and the source for each figure.
Data: Tax year 2026 (where a state has not published 2026 brackets yet, its latest published year, labelled on the row) Sources read Review by
CheckedOct 19, 2026These are the figures for tax year 2026.
- Structure
- Flat rate
- Top rate
- 4.95%
- Local income taxes
- None noted
Brackets
One rate applies to all taxable income, which is the state's own measure after its deductions and exemptions.
| Taxable income over | Rate on income above that amount |
|---|---|
| $0 | 4.95% |
Notes
Illinois taxes individual net income at a flat 4.95% for taxable years beginning on or after July 1, 2017, with the same rate for all filing statuses. Local governments do not levy an income tax on wages.
Sources
We read each source on the date shown and quote the line we relied on.
- 35 ILCS 5/201 (Tax imposed) (external site)
an amount equal to 4.95% of the taxpayer's net income for the taxable year
- Income Tax Rates (external site)
Individual Income Tax Effective July 1, 2017: 4.95 percent of net income