Illinois Paycheck & Net Salary Calculator
Calculate your net paycheck in Illinois factoring in state tax brackets, Federal tax, 401(k), and HSA deductions.
Paycheck Calculation Parameters
2026 IRS Pub 15-T Withholding & 50-State Tax Engine
Pre-Tax Deductions-$0/yr
Itemized Paystub Statement
Official W-2 Itemization| Earnings & Deductions | Per Period | Annual YTD | % Gross |
|---|---|---|---|
| Gross Earnings | $0 | $0 | 100.0% |
| Federal Income Tax (IRS) | -$0 | -$0 | 0% |
| Social Security (FICA 6.2%) | -$0 | -$0 | 0% |
| Medicare (FICA 1.45%) | -$0 | -$0 | 0% |
| Illinois State Income Tax | -$0 | -$0 | 0% |
| Net Take-Home Pay | $0 | $0 | 100.0% |
Overview of Illinois State Income Taxes (2026)
Illinois imposes a flat state income tax rate of 4.95% on all taxable income.
Frequently Asked Questions About Illinois Paycheck Taxes
What is the state income tax rate in Illinois for 2026?
Illinois levies a flat state income tax rate of 4.95% on taxable wages. Every dollar of taxable salary earned in Illinois is taxed at this single rate after federal standard deductions and pre-tax benefit contributions.
How do 401(k) and HSA pre-tax deductions lower my Illinois paycheck taxes?
Contributions to traditional 401(k) plans (up to $23,500/yr) and HSA accounts lower your taxable income on both your Federal W-4 tax returns and your Illinois state income tax withholdings. HSA contributions also save 7.65% in FICA Social Security and Medicare taxes.
What payroll taxes are deducted from my Illinois paycheck besides income tax?
All W-2 employees in Illinois are subject to federal FICA payroll taxes: 6.2% Social Security tax (capped at $184,500 in wages for 2026) and 1.45% Medicare tax (plus an additional 0.9% Medicare tax for annual earnings over $200,000 for single filers).
How is overtime pay taxed on a Illinois paycheck?
Overtime pay (hours worked over 40 hours per week at 1.5x hourly rate) is added to your regular gross income. It is taxed using standard progressive Federal and Illinois state income tax withholding tables per pay period.
How does pay frequency affect my Illinois net take-home pay?
Your total annual tax liability in Illinois remains identical regardless of pay frequency. However, per-paycheck take-home pay varies by pay period count: Bi-weekly salary is divided by 26 pay periods, Semi-monthly by 24, Weekly by 52, and Monthly by 12.