Illinois Freelance & 1099 Tax Calculator
Calculate freelance and 1099 taxes in Illinois. See self-employment tax, federal income tax, and Illinois state tax up to 4.95%. Quarterly estimate included.
How This Calculator Works
Calculation methodology and assumptions
Freelance tax calculator for Illinois. Net self-employment income = gross income − business expenses. Self-employment tax = 92.35% of net income × 15.3% (12.4% Social Security up to $168,600 + 2.9% Medicare). Half of SE tax is deductible. Federal income tax uses 2026 brackets. Illinois income tax applies at rates up to 4.95%. Quarterly estimated taxes = total tax ÷ 4.
Key State Information
Illinois freelance facts: State income tax up to 4.95%. Median household income: $72,205 | COL index: 96.4. LLC filing fee: $150 | Annual fee: $75.
Frequently Asked Questions
How much tax do freelancers pay in Illinois?
Freelancers in Illinois pay self-employment tax (15.3% on net earnings), federal income tax (10-37%), and Illinois state income tax (up to 4.95%). On $75,000 net income, total tax is typically $18,000-$25,000 depending on deductions.
Do freelancers need to pay quarterly taxes in Illinois?
Yes. The IRS requires quarterly estimated tax payments if you expect to owe $1,000+ in annual tax. Illinois also requires quarterly state estimated tax payments. Due dates: April 15, June 15, September 15, January 15.
What business expenses can freelancers deduct in Illinois?
Common deductions include: home office (simplified: $5/sq ft up to 300 sq ft), internet/phone (business %), equipment, software, health insurance premiums, vehicle/mileage ($0.67/mile in 2024), professional development, and retirement contributions (SEP-IRA up to 25% of net earnings or Solo 401k up to $69,000).
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