Everyday money · IL
Illinois Income Tax Calculator
Estimate your 2025 combined federal and Illinois income tax — Illinois adds a flat 4.95% state income tax.
InputsTY-2025
$
$
$
Federal + state tax18.3% effective
$18,258/yr
10% on $11,925$1,193
12% on $36,550$4,386
22% on $35,775$7,871
federal tax subtotal$13,449
IL state tax$4,809
taxable income
$84,250
marginal rate
22.0%
after tax
$81,742
Income tax in Illinois
Illinois has a flat 4.95% income tax that applies to wages and capital gains alike, including crypto. A per-person exemption of $2,850 (2025) reduces the taxable amount, though it phases out at high incomes.
Common questions
What is the Illinois state income tax rate?
Illinois has a flat 4.95% income tax that applies on top of federal tax.
Does Illinois tax capital gains?
Yes — Illinois taxes capital gains as ordinary income at the same rate as your wages.
How we calculate this
Federal brackets per our income-tax methodology, plus 2025 Illinois state tax. Estimates only — not tax advice.
Estimates for general informational purposes only; not tax advice. Illinois figures are simplified (credits, local taxes, and AGI adjustments vary) and should be verified with the state Department of Revenue.