How much income tax do you pay in Illinois?
At $75,000 of single-filer wages, Illinois’s estimated income tax of $2,916 ranks 12 of 51 (1 = highest) among the 50 states and DC.
| Salary (single) | Federal income tax | Illinois income tax | Social Security & Medicare | Take-home pay |
|---|---|---|---|---|
| $50,000 | $3,820 | $1,678 | $3,825 | $40,677 |
| $75,000 | $7,670 | $2,916 | $5,738 | $58,677 |
| $100,000 | $13,170 | $4,153 | $7,650 | $75,027 |
| $150,000 | $24,734 | $6,628 | $11,475 | $107,163 |
Single filer, standard deduction, no pre-tax deductions or credits.
How does Illinois’s flat income tax work?
Illinois taxes income at a single 4.95% rate in 2026. Because the rate doesn’t climb with income, your effective state rate is close to 4.95% once your income is well above Illinois’s own deductions and exemptions.
How is the federal part calculated?
Federal income tax uses the same 2026 brackets in every state: 10% up to $12,400 of taxable income for single filers, rising to 37% above $640,600, after a $16,100 standard deduction. See the full table on the federal income tax calculator.
Compare other states
See your paycheck in Illinois after taxes, or pick another state on the income tax calculator.
Frequently asked questions
What is the Illinois income tax rate for 2026?
Illinois has a flat 4.95% income tax for 2026 (2026).
How much is $100,000 after taxes in Illinois?
A single filer earning $100,000 in Illinois takes home about $75,027 a year ($2,886 every two weeks) after $13,170 federal income tax, $4,153 state income tax and $7,650 in payroll taxes, using the standard deduction and no pre-tax deductions.
Does this include local or city income tax?
No. Some cities and counties add their own income tax (for example New York City, Philadelphia, Detroit, Maryland counties and many Ohio and Pennsylvania localities). Add those separately if they apply to you.
Why does my Illinois return show a different number?
This estimate applies Illinois’s 2026 rates to your federal taxable income. Illinois may use its own standard deduction, exemptions, credits and joint-filer brackets, so your actual return can differ by a few hundred dollars.
Sources
Estimates only — not tax advice. CalciTools is not a CPA or law firm. These figures are educational estimates based on published IRS and state rates and a simplified model (they don't cover every deduction, credit, or situation). Verify with the IRS, your state tax agency, or a tax professional before making payments. Sources: IRS Rev. Proc. inflation adjustments & state Departments of Revenue.