Illinois Tax Brackets 2026
Illinois uses a single flat income tax rate of 4.95% for 2026. It applies to your taxable income after the state's deductions and exemptions, the same rate at every income level.
| Flat rate on taxable income (all filing statuses) | 4.95% |
Illinois also allows a personal exemption (deducted from income) of $2,925 for single filers.
See what these rates leave of an actual salary: Illinois paycheck calculator.
Frequently asked questions
What is the top income tax rate in Illinois?
For 2026, the top income tax rate in Illinois is a flat 4.95%. Graduated states apply that top rate only to income above the final threshold, not to your whole salary.
How do Illinois taxes compare with other states?
The clearest comparison is take-home pay on the same salary across states. Use the take-home pages to see how Illinois stacks up against a no-income-tax state and its neighbors.
Federal: IRS 2026 brackets (Rev. Proc. 2025-32) · FICA: IRS Topic 751 · Wage base: SSA · Illinois: Illinois Department of Revenue. Rates current as of July 16, 2026. Annual-liability estimates, not payroll withholding — see methodology.