Illinois Pay Calculator
Calculate your net pay after Illinois state taxes and federal taxes. Enter your gross pay and pay frequency to see your take-home amount.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to use the Illinois Pay Calculator
- Enter Gross Pay: Input your gross (pre-tax) pay amount for a single pay period. Use a positive number (e.g., 5000).
- Select Pay Frequency: Choose how often you get paid: Weekly, Bi-Weekly, Semi-Monthly, or Monthly.
- Choose Federal Filing Status: Select your federal tax filing status: Single, Married Filing Jointly, or Head of Household.
- Set Allowances: Enter the number of allowances you claim (default is 2). Must be a non-negative whole number.
- Calculate: Click the "Calculate Net Pay" button.
What the results show:
- Net Pay: Your take-home pay after all deductions.
- Gross Pay: The amount you entered.
- Federal Tax: Estimated federal income tax based on simplified 2025 brackets and allowances.
- Illinois State Tax: Flat 4.95% of gross pay.
- FICA: Social Security (6.2%) + Medicare (1.45%) = 7.65% of gross pay.
Formula: Net Pay = Gross Pay - Federal Tax - Illinois State Tax - FICA. All amounts are per pay period.
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Frequently Asked Questions
Illinois has a flat income tax rate of 4.95% (as of 2025). The calculator multiplies your gross pay by 0.0495 to estimate state tax.
The calculator uses simplified 2025 federal income tax brackets for Single, Married Filing Jointly, and Head of Household. It accounts for allowances as a proxy for deductions.
Yes, FICA (Social Security and Medicare) is included at a combined rate of 7.65% (6.2% for Social Security and 1.45% for Medicare).
