Your Pay Details
Your Take-Home Pay
| Gross Pay | $0 |
| Federal Income Tax | –$0 |
| Social Security (6.2%) | –$0 |
| Medicare (1.45%) | –$0 |
| Illinois State Tax (4.95%) | –$0 |
| Take-Home Pay | $0 |
How Your Illinois Paycheck Works
Illinois has a flat 4.95% state income tax rate on all wages. A small personal exemption ($2,425 for single filers, $4,850 for married couples) reduces your taxable income slightly before the rate is applied.
Federal Income Tax
Calculated using 2025 federal brackets from 10% to 37%, applied to your taxable income after the standard deduction.
Social Security
6.2% of your gross pay up to $176,100. Funds the Social Security retirement and disability program.
Medicare
1.45% of all gross pay with no income cap. High earners over $200K pay an additional 0.9% surtax.
Illinois State Tax
Illinois taxes wages at a flat 4.95% after a personal exemption of $2,425 (single) or $4,850 (married filing jointly).
2025 Federal Tax Brackets
The US uses a progressive tax system — you only pay each rate on income within that bracket, not your entire salary.
Single Filers
| Rate | Income Range |
|---|---|
| 10% | $0 – $11,925 |
| 12% | $11,926 – $48,475 |
| 22% | $48,476 – $103,350 |
| 24% | $103,351 – $197,300 |
| 32% | $197,301 – $250,525 |
| 35% | $250,526 – $626,350 |
| 37% | Over $626,350 |
Married Filing Jointly
| Rate | Income Range |
|---|---|
| 10% | $0 – $23,850 |
| 12% | $23,851 – $96,950 |
| 22% | $96,951 – $206,700 |
| 24% | $206,701 – $394,600 |
| 32% | $394,601 – $501,050 |
| 35% | $501,051 – $751,600 |
| 37% | Over $751,600 |
Major Cities in Illinois
Whether you live in Chicago, Aurora, or anywhere else in Illinois, state tax rates apply uniformly — your city does not change your paycheck calculation. Local taxes and cost of living vary by city, as shown below.
* Population from U.S. Census estimates. Home prices and rent are 2023–2024 estimates. Local income tax applies to residents unless noted.
Frequently Asked Questions
What is Illinois's state income tax rate?
Illinois has a flat 4.95% state income tax rate. Illinois allows a personal exemption of $2,425 for single filers and $4,850 for married couples filing jointly, which reduces your state taxable income slightly.
What percentage of my paycheck goes to taxes in Illinois?
In Illinois, a single filer earning $55,000/year pays roughly 4.9% in state income tax (after personal exemption) plus federal taxes and FICA. Total deductions typically run 25–28% of gross pay.
What is FICA and how much is it?
FICA covers Social Security (6.2% up to $176,100) and Medicare (1.45% with no cap). Together that's 7.65% of gross pay. Every US worker pays these regardless of state.
How do pre-tax deductions like a 401(k) reduce my taxes?
Pre-tax deductions reduce your federal taxable income, lowering your tax bill. A $5,000 annual 401(k) contribution could save $600–$1,100 in federal taxes depending on your bracket.
How accurate is this calculator?
This calculator uses 2025 federal brackets and the state's current flat rate. Results are close estimates — your actual paycheck may vary based on W-4 elections and employer deductions.