1099 Tax Estimator, Illinois
Free 1099 tax estimator for US freelancers and independent contractors. Calculate your self-employment tax (15.3%), federal income tax, and quarterly payment schedule based on your 1099 income and filing status. 2024 tax year rates.
Illinois has a flat 4.95% state income tax rate, which applies to all income levels. Combined with federal self-employment tax, Illinois 1099 contractors should set aside around 35% of net income.
Illinois also has a 1.5% personal property replacement tax for some business structures. Quarterly estimated payments are due to both the IRS and Illinois DOR.
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General calculator →Frequently Asked Questions, 1099 Tax Estimator in Illinois
How much should an Illinois 1099 contractor set aside for taxes?↓
Illinois freelancers should set aside approximately 35–40% of net income. This covers: federal self-employment tax (15.3%), federal income tax at your bracket, and Illinois flat state income tax at 4.95%. The flat rate makes Illinois tax planning straightforward, everyone pays the same 4.95% regardless of income level.
What is the Illinois income tax rate for self-employed workers?↓
Illinois has a flat income tax rate of 4.95% for all individuals, including self-employed workers and freelancers. This applies to all net income after deductions. Unlike most states with progressive brackets, Illinois's flat rate means a $30,000 earner and a $300,000 earner both pay 4.95% on their taxable income.
When are Illinois estimated tax payments due for 1099 workers?↓
Illinois estimated tax payments (IL-1040-ES) are due on the same schedule as federal: April 15, June 15, September 15, and January 15. Both federal and Illinois estimated payments should be made quarterly to avoid underpayment penalties. Illinois requires estimated payments if you expect to owe more than $500 in state tax for the year.
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