4.95% flatIL
Freelance Taxes in Illinois: Complete 2026 Guide
Illinois has a flat income tax rate of 4.95% on all income — one of the simplest state tax structures.
Quarterly Estimated Payments
IL requires quarterly estimated payments if you expect to owe $500 or more.
Key Tax Facts for Illinois Freelancers
- •Simple flat tax rate — no brackets to navigate
- •Chicago residents may owe additional city taxes
- •Illinois follows federal quarterly payment schedule
- •Personal property replacement tax applies to S-Corps at 1.5%
Deductions in Illinois
Illinois generally does not conform to federal itemized deductions. The state has its own standard exemption system.
Top Freelancer Cities in Illinois
ChicagoAuroraRockfordJoliet
Free Tax Calculators
Estimate your total tax burden — federal plus Illinois — with our free calculators.
Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.