What is the self-employment tax rate in Illinois?

Federal self-employment tax is 15.3%. Illinois also has state income tax — use our calculator to find your total rate.

Does Illinois have state income tax?

Yes, Illinois has state income tax. Use our income tax brackets calculator to find your rate.

Illinois Tax Calculators — 2026

Free self-employment and income tax calculators for Illinois residents. Updated for the 2026 tax year.

Illinois has a flat 4.95% income tax — the only state with a constitutionally mandated flat rate. LLC filing fee is $150.

Tax Calculators for Illinois

Self-Employment Tax Calculator→Quarterly Tax Estimate Calculator→Income Tax Brackets→Freelancer Tax Guide→Tax Deduction Checklist→Business Registration Cost→LLC Filing Requirements→Sales Tax Registration→Independent Contractor Tax Calculator→Estimated Tax Deadlines→

Illinois Tax Quick Facts

State Income Tax

Yes — up to 5%

Sales Tax

LLC Filing Fee

$150

Annual Report Fee

$75

Frequently Asked Questions

What taxes do self-employed people pay in Illinois?

Self-employed individuals in Illinois pay federal self-employment tax (15.3%) on net profit, plus federal income tax and Illinois state income tax. You must make quarterly estimated payments if you expect to owe $1,000 or more.

Is Illinois a good state for freelancers?

Illinois has state income tax which adds to your total tax burden. Compare with no-tax states (FL, TX, NV, WA, etc.) using our state comparison tool to see potential savings.