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Illinois Paycheck Calculator
Illinois uses a flat 4.95% state income tax rate -- no brackets, no surprises. The Illinois constitution actually requires a flat rate, so any future increases would apply to everyone equally.
Your Paycheck Inputs
Estimated Paycheck Breakdown
Gross pay (this period)$0.00
Pre-tax deductions (401k + health)$0.00
Federal income tax$0.00
Illinois state income tax$0.00
Social Security (6.2%)$0.00
Medicare (1.45% + Additional)$0.00
Net take-home pay$0.00
Effective federal rate0.00%
Effective Illinois state rate0.00%
Annual net (projection)$0.00
Estimate using 2026 federal brackets, $168,600 Social Security wage base, and the 0.9% Additional Medicare Tax on wages above $200,000 single / $250,000 MFJ.
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Illinois State Income Tax: Flat 4.95%
Illinois charges a flat 4.95% on all taxable income. The Illinois Constitution prohibits a graduated income tax; a 2020 ballot measure to allow brackets was rejected by voters.
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