Illinois Paycheck Calculator
Calculate Illinois take-home pay with the Prairie State's flat 4.95% state income tax, federal withholding, and FICA deductions.
Illinois Paycheck Calculator (Flat 4.95% State Tax)
2025/2026 Tax RulesDid this calculation save you time?
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What Is a Illinois Paycheck Calculator?
The Illinois Paycheck Calculator models net wages under Illinois' constitutionally protected flat income tax rate of 4.95%, making state tax calculations predictable and straightforward.
How to Use This Calculator
- Enter your Illinois gross wages.
- Select filing status and pay frequency to compute flat 4.95% state tax and federal deductions.
Illinois Flat Tax Formula
\text{IL Tax} = (\text{Gross Wages} - \text{IL Exemption}) \times 0.0495Illinois levies a uniform 4.95% tax rate on all adjusted net income.
Worked Example
Scenario: An employee earning $75,000 in Illinois.
Gross: $75,000.
Federal + FICA: ~$13,687.
IL State Tax (4.95%): $3,712.50.
Net Take-Home: $57,600 ($2,215 bi-weekly).
Tips & Key Notes
- Illinois does not allow local city or county income taxes, keeping state wage deductions uniform across all counties.
- Illinois has reciprocal tax agreements with Iowa, Kentucky, Michigan, and Wisconsin.
Frequently Asked Questions
What is the Illinois state income tax rate?
Illinois has a flat individual income tax rate of 4.95% on all taxable income.
Does Illinois tax retirement income?
No. Illinois completely exempts qualified retirement income, including 401(k), IRA distributions, pensions, and Social Security.
Does Illinois have local municipal wage taxes?
No. Illinois law prohibits cities from levying municipal income taxes on workers.
Can Illinois change to a graduated progressive tax?
A progressive tax requires an amendment to the Illinois state constitution, which voters rejected in the 2020 ballot initiative.
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