Max $24,500/year
Per paycheck
Illinois Payroll Calculator β 2026 IL Wage Guide
This Illinois payroll calculator gives you an exact estimate of your take-home pay. It uses 2026 tax rates. Illinois uses a flat 4.95% rate on all income. Whether you earn $30,000 or $300,000, the percentage withheld is identical. This makes payroll calculations very predictable.
π‘ Illinois charges a flat 4.95% rate on wage income. Illinois has no separate local income tax in most areas, though some municipalities charge small additional fees. Chicago itself does not add a local wage tax.
Understanding Your Taxable Wages in Illinois
Your taxable wages are the portion of your paycheck subject to tax. This is usually your gross pay minus certain pre-tax deductions like 401(k) contributions or health insurance premiums. Federal taxable wages and Illinois state taxable wages can differ slightly depending on which deductions the state allows.
For most workers, taxable wages are close to gross pay minus any pre-tax benefits you elect. Our calculator applies the correct taxable wage base automatically based on your entries.
Local Income Taxes in Illinois
Illinois has no separate local income tax in most areas, though some municipalities charge small additional fees. Chicago itself does not add a local wage tax.
Form W-4 and Withholding in Illinois
When you start a new job, you complete a federal Form W-4. This form tells your employer how much federal tax to withhold taxes from each paycheck. Your filing status, dependents, and any additional withholding you request all affect this calculation.
Filling out your Form W-4 correctly matters. If you withhold too little, you may owe money at tax time. If you withhold too much, you get a bigger refund but less money in each paycheck throughout the year. Our calculator shows you the standard withholding amount based on current 2026 tax brackets.
Payroll Taxes: What Comes Out of Every Illinois Paycheck
Every Illinois paycheck has several types of payroll taxes withheld. Understanding each one helps you read your pay stub with confidence.
- Federal income tax: Based on 2026 IRS tax brackets, from 10% to 37%
- Illinois state tax: a flat 4.95% rate
- FICA taxes: Social Security (6.2%) and Medicare (1.45%)
FICA taxes fund Social Security and Medicare programs nationwide. Every worker pays these regardless of state. Your employer also pays a matching amount on your behalf, though this employer portion doesn't come out of your paycheck.
State Unemployment Tax β Does It Affect Your Paycheck?
State unemployment tax in Illinois is primarily paid by employers, not employees. This tax funds unemployment benefits for workers who lose their jobs. It typically does not appear as a deduction on your pay stub, since the employer covers the full cost in most states including Illinois.
Gross Pay vs Net Pay: What's the Difference?
Your gross pay is your full salary before any deductions. Your net pay β also called take-home pay β is what actually lands in your bank account after federal tax, Illinois state tax, and FICA taxes are withheld.
Use the calculator above to see your exact net pay. Enter your salary, select your pay frequency, and instantly see the full breakdown between gross pay and take-home pay.
Frequently Asked Questions β Illinois Payroll Calculator
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