This free Illinois 1099 tax calculator helps gig workers, freelancers and independent contractors estimate their 2026 self-employment tax, federal income tax and Illinois state income tax on 1099 income. Works for DoorDash, Uber, Etsy, OnlyFans, Airbnb and all gig platforms.
As a 1099 worker in Illinois, you pay self-employment tax of 15.3% on 92.35% of your net earnings (this covers Social Security 12.4% and Medicare 2.9%). On top of that, you owe federal income tax at your bracket rate (10%–37%). Illinois additionally charges up to 4.95% state income tax on your 1099 income.
You can deduct 50% of your SE tax from gross income, plus business expenses like mileage ($0.725/mile in 2026), phone, equipment, and home office. Most gig workers in Illinois end up with an effective total tax rate of 18%–28% after deductions.
* Estimates based on standard deduction, single filer, after 50% SE deduction. Use the full calculator above for your exact situation.
| Quarter | Due Date | Federal | State |
|---|---|---|---|
| NOWQ1 2026 | April 15, 2026 | ✓ Required | Required |
| Q2 2026 | June 16, 2026 | ✓ Required | Required |
| Q3 2026 | September 15, 2026 | ✓ Required | Required |
| Q4 2026 | January 15, 2027 | ✓ Required | Required |
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