Illinois income tax calculator
Illinois has a flat 5% for 2026. On $100,000 of pay a single filer keeps $74,375, after $13,170 of federal income tax, $7,650 of Social Security and Medicare, and $4,805 to Illinois.
Your year
Illinois’s 2026 schedule, deductions and exemptions, with the federal brackets, payroll tax and the child tax credit.
I’m paid a year, file , live in Illinois and put into a 401(k).
kept for 2026, about $6,198 a month. Tax takes 25.6% of your pay.
| Federal income tax | $13,170 |
| Social Security | $6,200 |
| Medicare | $1,450 |
| Illinois income tax | $4,805 |
| All of it | $25,625 |
Of your next $1,000 of pay, $346 goes to tax: the 22% federal bracket, payroll tax and the state’s 5%. See what would lower it.
Take-home pay in Illinois
What a year’s pay keeps after every tax, with no 401(k), kids or other income.
| Pay | State tax | Kept, single | Kept, jointly |
|---|---|---|---|
| $50,000 | $2,330 | $40,025 | $42,210 |
| $75,000 | $3,568 | $58,025 | $61,200 |
| $100,000 | $4,805 | $74,375 | $80,050 |
| $150,000 | $7,280 | $106,511 | $116,050 |
| $250,000 | $12,230 | $170,952 | $185,383 |
Illinois tax brackets for 2026
One rate on all taxable income, after Illinois’s own deductions and exemptions.
| Every filing status | 5% |
Questions people ask
What is the Illinois income tax rate for 2026?
Illinois has a flat 5%. On $100,000 of pay a single filer's state tax is $4,805, 4.8% of pay.
How much is take-home pay on $100,000 in Illinois?
$74,375 for a single filer in 2026, about $6,198 a month: $13,170 of federal income tax, $7,650 of Social Security and Medicare, and $4,805 to Illinois.
How does Illinois compare with a state with no income tax?
On $100,000 single, $4,805 a year less is kept than in Texas or Florida, where the same pay keeps $79,180.
Does a 401(k) lower Illinois income tax?
Pay put into a traditional 401(k) comes off federal income tax and Illinois's. It doesn't lower Social Security or Medicare.
Checked on October 29, 2026 against Rev. Proc. 2025-32, SSA 2026 fact sheet and Illinois's published 2026 schedule. An estimate for your records, not tax advice.
The federal side: the 2026 brackets. From your own pay stub, with what is left to pay: the tax forecast.
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Put more back in your pocket.
Reimburse works out your whole year from a pay stub and last year's return, and every move that would lower it.