Illinois Freelance Tax Calculator 2025
Illinois has a flat 4.95% income tax — freelancers in Chicago also pay city tax, so total state+local burden can be higher. Enter your income below for a complete breakdown of SE tax, federal income tax, and state tax — plus your exact quarterly payment amounts.
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Deductible expenses reduce your taxable income.
Based on 2025 federal tax brackets and state rates. Figures are estimates for planning purposes only. Consult a tax professional for advice specific to your situation.
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Your results will show a full tax breakdown, quarterly payments, and how much to set aside.
Freelance taxes in Illinois
State Income Tax
5.0%
Effective rate on SE income
SE Tax Rate (Federal)
15.3%
Same in every state (SS + Medicare)
Largest Freelance City
Chicago
Illinois's top freelance hub
Recommended Set-aside
30–35%
Of gross income for taxes
Freelancers in Illinois are subject to the federal self-employment tax of 15.3% on 92.35% of net earnings — this covers Social Security (12.4% up to $176,100) and Medicare (2.9% with no cap). On top of that, you'll pay federal income tax using 2025 brackets, plus Illinois state income tax at up to 5.0%. Use the calculator above to get your exact combined bill and quarterly payment breakdown.
Frequently asked questions
Do freelancers in Illinois pay state income tax?
Yes. Illinois freelancers pay a 5.0% state income tax in addition to federal income tax and self-employment tax.
How much self-employment tax do Illinois freelancers pay?
Self-employment tax is federal — it's the same rate in every state. Freelancers in Illinois pay 15.3% SE tax on 92.35% of net self-employment income (12.4% Social Security up to $176,100 + 2.9% Medicare with no cap). You can deduct 50% of this from your AGI.
Do I need to pay quarterly estimated taxes in Illinois?
Yes, if you expect to owe $1,000 or more in federal taxes for the year. Illinois also requires quarterly estimated state tax payments if you expect to owe more than the state threshold. Federal deadlines are April 15, June 16, September 15, and January 15.
What percentage of income should Illinois freelancers save for taxes?
Illinois freelancers should generally set aside 30–35% of gross income for taxes, covering federal income tax, 15.3% self-employment tax, and 5.0% state income tax.
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