Illinois charges 4.95% flat state income tax. Use the tax refund estimator pre-loaded with Illinois rates.
Open Tax Refund Estimator →In Illinois, you may receive refunds at both the federal and state level. Your state refund depends on how your employer's flat 4.95% withholding compared to your actual Illinois tax liability. Common reasons for a state refund include credits, deductions, or withholding calibrated for a higher income than you actually earned. Use this estimator to project both your federal and Illinois state refund amounts.
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 tax refund estimator 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.