Illinois Self-Employed Tax Calculator
Federal + 15.3% SE + Illinois flat 4.95% state income tax on 2026 1099 income for Illinois residents.
Illinois taxes all personal income — including self-employment profit — at a flat 4.95% rate. There is no local income tax in most of the state, but Illinois also charges a 1.5% Personal Property Replacement Tax on partnerships and S-corps.
Self-employed income & expenses
Estimate federal + SE + state tax for the 2026 tax year in one pass.
Estimated total tax bill
$12,874
Refund / owed
-$12,874
Effective rate
21.5%
Detailed breakdown
Mileage deduction$5,360
Total business expenses$7,860
Net self-employment income$52,140
Self-employment tax (15.3%)$7,367
½ SE deduction (above-the-line)$3,684
Adjusted gross income$48,456
Taxable income$33,856
Federal income tax$3,831
State tax (est.)$1,676
Quarterly estimated payment$3,038
Marginal rate16.9%
Related calculators
- Texas Self-Employed Tax CalculatorFederal + SE tax for Texas 1099 workers — no state income tax.
- California Self-Employed Tax CalculatorFederal + SE + CA state tax for California 1099 workers.
- Florida Self-Employed Tax CalculatorFederal + SE tax for Florida 1099 workers — no state income tax.
- New York Self-Employed Tax CalculatorFederal + SE + NY state (and NYC) tax for New York 1099 workers.
Related blog posts
- Texas Self-Employed Taxes: The Complete 2026 GuideHow self-employed taxes work in Texas for 2026: no state income tax, federal + SE tax, franchise tax, deductions, and a free calculator.
- California Self-Employed Taxes: The Complete 2026 GuideHow California self-employed taxes work in 2026: state brackets to 13.3%, SE tax, quarterly payments, deductions, and a free calculator.
- How to Calculate 1099 Taxes: A Step-by-Step Guide for 2024Learn exactly how to calculate 1099 taxes in 2024 — self-employment tax, federal income tax, deductions, and quarterly payments, with worked examples.
- How Much Should You Set Aside for 1099 Taxes?A clear, state-by-state framework for how much of every 1099 payout to set aside for taxes in 2024 — with worked examples for Uber, DoorDash, and freelancers.