Self-employment tax in Illinois
Illinois freelancers pay federal self-employment tax, federal income tax, and a flat 4.95% Illinois state income tax on their net profit — the same rate at every income level.
What a Illinois freelancer owes
- Federal self-employment tax of 15.3% (Social Security + Medicare).
- Federal income tax on your net profit (after the deductible half of SE tax).
- Illinois state income tax at a flat 4.95% — no brackets.
Estimate your Illinois taxes
Free 1099 self-employment tax calculator — add Illinois's 4.95% flat state rate. No sign-up.
Enter Illinois's 4.95% flat in the State Tax field for a full estimate.
States with no income tax are set to 0%. Estimate only — adjust for local taxes.
Estimates use 2026 US federal figures (IRS Rev. Proc. 2025-32): self-employment tax of 15.3% (12.4% Social Security up to the $184,500 wage base + 2.9% Medicare) plus federal income tax on your net profit after the standard deduction. State and local taxes are only included if you set a state rate above. Simplified estimate for planning only — not tax advice.
Illinois freelancer tax — FAQ
Do freelancers pay state income tax in Illinois?
Yes. Illinois charges a flat 4.95% state income tax on all taxable income, including 1099 / self-employed profit, on top of federal taxes.
How do I estimate my Illinois 1099 taxes?
Estimate the federal self-employment and income tax with MoneyFeed's free calculator, then add 4.95% Illinois state tax on your net profit.
Figures are 2026 headline guidance for freelancers and the self-employed, not tax advice. Check current IRS and state rules or a CPA for your situation.