Illinois charges 4.95% flat state income tax. Use the employer cost calculator pre-loaded with Illinois rates.
Open Employer Cost Calculator →Employers in Illinois must withhold and remit the flat 4.95% state income tax, plus handle their share of FICA, FUTA, and Illinois's state unemployment insurance. The total cost to employ someone at a $75,000 salary in Illinois is typically 10-15% above the gross salary, covering the employer's payroll tax share, SUI, workers' comp, and benefits. This calculator breaks down the full employer cost with Illinois's specific tax rates.
Illinois levies a flat 4.95% state income tax on all taxable income regardless of how much you earn. This makes tax planning straightforward: for every additional dollar you earn, 4.95 cents goes to Illinois. Illinois does not impose local income taxes, so the 4.95% flat rate is the only state-level income tax you owe.
The table below shows what you actually keep at five salary levels in Illinois, accounting for federal tax, FICA, and Illinois's flat 4.95% state tax.
See how Illinois compares to other Midwest states. Each link takes you to the employer cost calculator landing page for that state.
For a comprehensive breakdown of Illinois’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Illinois take-home pay page.