USCalcs

Illinois Income Tax Calculator 2026

Estimate your Illinois federal and state income tax for 2025.

Your inputs

$

Your liability

Total tax
$14,749
After tax: $70,252
Federal tax
$10,541
Taxable: $70,400
State tax
$4,208
Taxable: $85,000
Effective rate
17.35%
Federal marginal
22.0%
Federal bracket breakdown
10.00%on $11,600$1,160
12.00%on $35,550$4,266
22.00%on $23,250$5,115

About Illinois income tax

Tax structure

Illinois uses a flat tax rate of 4.95% on taxable income. Illinois uses a flat 4.95% rate. Illinois does not allow a federal-style standard deduction; instead, a personal exemption (~$2,775) reduces taxable income.

Snapshot at $75,000 (single)

  • Take-home: $57,209 per year
  • Federal tax: $8,341
  • State tax: $3,713
  • Effective rate: 23.72%
  • vs. Texas (no income tax): Illinois keeps $3,713 more.

Compare to neighboring states

Wisconsin →Iowa →Missouri →Kentucky →All states

Illinois tax FAQ

How much state income tax will I pay in Illinois?

Illinois state income tax depends on your taxable income and filing status. Use the calculator above for an exact estimate. Illinois uses a flat 4.95% rate. Illinois does not allow a federal-style standard deduction; instead, a personal exemption (~$2,775) reduces taxable income.

What's the difference between federal and Illinois state tax?

Federal income tax is collected by the IRS using nationwide brackets (10%–37%). Illinois state income tax (where applicable) is separate and uses its own brackets and deductions. Both apply to most Illinois residents.

Are these the 2025 or 2026 tax brackets?

The calculator uses tax year 2025 federal brackets — the figures you'll use to file in early 2026. The IRS adjusts brackets annually for inflation; we update when 2026 figures are released.

Should I take the standard deduction or itemize?

Take whichever is larger. The 2025 standard deduction is $14,600 (single), $29,200 (married filing jointly), or $21,900 (head of household). Itemize if your mortgage interest, state and local taxes (capped at $10,000), and charitable donations exceed that amount.