Illinois Paycheck Calculator 2025
Illinois imposes a flat 4.95% state income tax on all wages — straightforward and consistent regardless of how much you earn.
Enter your annual salary to instantly see your Illinois paycheck breakdown, updated for 2025 IRS federal brackets.
Not tax advice — for estimation only.
How It Works
- Enter your annual gross income
- Select your state of residence
- Choose your pay frequency
- Click Calculate to see your full breakdown
Frequently Asked Questions
Common questions about this calculator.
What is Illinois's state income tax rate?
Illinois has a flat state income tax rate of 4.95% on all taxable income. This rate applies equally to all income levels — there are no brackets or exemptions based on salary.
Does Illinois have local income taxes?
No statewide local income tax exists in Illinois, but Chicago imposes additional taxes on certain transactions and services. For most employees statewide, the state 4.95% flat tax is the primary state-level income deduction.
How do Illinois taxes affect a $65,000 salary?
At $65,000, you'd pay approximately $3,218 in Illinois state tax (4.95%), roughly $6,000 in federal income tax, and $4,973 in FICA, leaving a net annual income of about $50,800 — or $1,954 bi-weekly.
How does the paycheck calculator work?
We apply 2025 IRS federal tax brackets (10%–37%) to your annual income, add FICA (6.2% Social Security up to $168,600 + 1.45% Medicare), and apply your state's effective income tax rate. The total is divided by your pay frequency to give you per-paycheck figures.
Does the calculator account for the standard deduction?
Yes. For single filers in 2025, we apply the $14,600 standard deduction before computing federal income tax brackets, matching IRS Publication 15-T withholding methodology.
Why might my actual paycheck differ?
Your employer withholds taxes based on your W-4 elections, pre-tax deductions (401k, health insurance), and local/city taxes that vary by municipality. This calculator provides a close estimate; consult your HR department or a CPA for exact figures.
What is FICA?
FICA stands for Federal Insurance Contributions Act. It includes Social Security (6.2% on wages up to $168,600 in 2025) and Medicare (1.45% on all wages, plus 0.9% on wages over $200,000 for single filers).
Is this tool updated for 2025?
Yes. We use the 2025 IRS federal tax brackets, the 2025 Social Security wage base of $168,600, and the latest published state income tax rates for all 50 states.