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Illinois Income Tax Calculator
Estimate your 2026 Illinois state and federal income tax liability for W-2, self-employment, and investment income.
On $75,000 of W-2 income, a single filer in Illinois owes about $11,238 in income tax for 2026 — $7,670 federal plus $3,568 to Illinois — leaving roughly $63,762 before FICA payroll taxes.
Total tax liability
for 2026
Effective Rate
15.0%
Federal marginal
22.0%
Cap gains rate
15.0%
State rate
5.0%
2026 federal tables from IRS Rev. Proc. 2025-32; Illinois rates from the state's revenue department and statutes (2026 rates; brackets, standard deduction and exemptions from the latest published state tables, 2025 where the state has not released 2026 figures). Reviewed by Junead Khan. Last updated .
How Illinois taxes your income
Flat 4.95%
Illinois applies a flat 4.95% state income tax to your taxable income — the same rate at every income level — on top of federal income tax.
Illinois allows a $2,925 personal exemption ($5,850 for married couples filing jointly), lost once income passes $250,000 ($500,000 joint).
Illinois income tax questions.
Yes. Illinois applies a flat 4.95% income tax to taxable income.
A flat 4.95% on taxable income, in addition to federal income tax. Illinois allows a $2,925 personal exemption ($5,850 for married couples filing jointly), lost once income passes $250,000 ($500,000 joint).
On $75,000 of W-2 income (single filer), an estimated $11,238 in total income tax — including about $3,568 to Illinois, leaving roughly $63,762 after income tax (before FICA payroll taxes). Adjust income and filing status in the calculator above for your exact numbers.
About 14.98% combined federal and state income tax for a single filer, of which roughly 4.76% is Illinois state tax. FICA payroll taxes (7.65% for most employees) come on top of that.
Estimates use 2026 federal and state tax rates, and each state's own brackets, standard deduction and personal exemptions for your filing status. Your actual liability varies with itemized deductions, dependents, other credits, local taxes, and other income.
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