2026 tax year · Illinois
1099 tax calculator for Illinois
Illinois taxes income at a flat 4.95% for 2026, applied on top of federal income tax and self-employment tax.
Switching state opens that state's page.
Enter your numbers and press Calculate to see your 2026 estimate.
How 1099 tax works in Illinois
Illinois applies a single 4.95% rate to taxable income for 2026, so every extra dollar of 1099 profit is taxed at the same state rate.
On top of that sits the federal layer, which is the same wherever you live: self-employment tax plus federal income tax. The 1099 tax calculator hub works through how that half is built.
Worked example: $50,000 of 1099 income in Illinois
A single filer with $50,000 of net 1099 income and no W-2 wages, taking the standard deduction, owes an estimated:
| Self-employment tax | $7,065 |
| Federal income tax | $2,667 |
| Illinois state income tax | $2,300 |
| Total tax | $12,032 |
| Effective rate | 24.1% |
| After-tax income | $37,968 |
Illinois against the states it borders
On $50,000, Illinois charges $2,475 of state income tax. Of the 5 states it borders, Indiana is the lightest at $1,475 and Wisconsin the most expensive at $2,263, a spread of $788 on the same income.
| State | Tax on $50,000 | vs Illinois |
|---|---|---|
| Indiana | $1,475 | −$1,000 |
| Kentucky | $1,750 | −$725 |
| Iowa | $1,900 | −$575 |
| Missouri | $2,230 | −$245 |
| Wisconsin | $2,263 | −$212 |
- Indiana would take $1,000 less, $1,475 against Illinois's $2,475.
- Kentucky would take $725 less, $1,750 against Illinois's $2,475.
- Iowa would take $575 less, $1,900 against Illinois's $2,475.
- Missouri would take $245 less, $2,230 against Illinois's $2,475.
- Wisconsin would take $212 less, $2,263 against Illinois's $2,475.
What this estimate assumes
- Single filer, $16,100 federal standard deduction, net profit after expenses.
- No local income tax is modeled.
- No Illinois credits are applied beyond the deductions in its own rules.
Illinois 1099 tax questions
Does Illinois tax 1099 income?
Yes. Illinois taxes net profit from 1099 work the same way it taxes other income, at a flat 4.95%. On the $50,000 example above the state share is $2,300.
How much should a 1099 worker in Illinois set aside?
About 24% of net profit, based on the $50,000 single-filer example above ($12,032 of federal, self-employment and Illinois state tax combined). Your own rate moves with filing status, other income and deductions, run the calculator with your numbers.
Are there local income taxes in Illinois?
The estimate above models federal, self-employment and state income tax only, it does not include any city, county or school-district income tax. The 2026 dataset carries no local-tax note for Illinois, so check with the municipality where you live and work before relying on the state figure alone.
Does Illinois reciprocity help if I do 1099 work across a state line?
Usually not. Illinois has wage reciprocity with Iowa, Kentucky, Michigan and Wisconsin (exemption form IL-W-5-NR), but reciprocity agreements cover wages paid by an employer, not self-employment income. A 1099 worker with income sourced to another state generally still files there and claims a credit at home.
When are quarterly estimated payments due?
Federal 1040-ES payments for the 2026 tax year are due April 15, 2026, June 16, 2026, September 15, 2026, January 15, 2027. Illinois requires its own estimated payments; the 2026 dataset does not yet carry state-specific due dates, so confirm them with the Illinois tax agency.