Illinois vs Federal Tax Comparison
| Tax Type | IL State Rate | Federal Rate | Notes |
|---|---|---|---|
| Personal Income Tax | 4.95% flat | Federal: 10–37% | Combined fed+state applies |
| Corporate Income Tax | 9.5% | Federal: 21% | 9.5% (7% + 2.5% personal property replacement) |
| State Sales Tax | 6.25% | No federal sales tax | Combined avg: 8.86% |
| Capital Gains Tax | 4.95% | Federal: 0–20% | Same as income tax |
About Illinois Taxes
Flat income tax but highest corp rate among Midwest states.
Illinois levies income tax at rates from 4.95% flat. The flat rate structure means all taxpayers pay the same percentage, providing simplicity and predictability.
Corporate activity in Illinois faces a 9.5% state corporate tax rate. 9.5% (7% + 2.5% personal property replacement). Combined with the 21% federal corporate rate, businesses should plan accordingly.
Calculate Your Net Salary in Illinois
See federal + IL state tax deductions, Social Security, Medicare, and take-home pay
Open US Salary CalculatorFrequently Asked Questions — Illinois Taxes
What is Illinois's state income tax rate?
Illinois uses a flat 4.95% income tax rate — meaning all taxable income is taxed at the same rate regardless of earnings level. This simplifies filing and is generally favorable for higher earners compared to progressive bracket states.
What is the corporate income tax rate in Illinois?
Illinois imposes a corporate income tax at 9.5%. 9.5% (7% + 2.5% personal property replacement). Businesses should also account for federal corporate tax at 21% on top of the state rate.
What is the sales tax rate in Illinois?
Illinois has a state sales tax of 6.25%. When local city and county taxes are included, the average combined rate reaches 8.86%. Rates vary by locality so check the specific municipality for accurate figures.
How does Illinois compare to neighboring states for taxes?
Illinois's overall tax burden ranks favorably among US states. The state levies income tax at up to 4.95%. For individuals evaluating relocation or remote work, comparing the full picture — income, sales, and property taxes — is essential. Use our US Salary Calculator to estimate your net income in Illinois.
Are there any special tax incentives or exemptions in Illinois?
Illinois offers notable tax characteristics: Flat income tax but highest corp rate among Midwest states. Businesses and individuals should consult a qualified tax advisor to understand eligibility for available credits, deductions, and incentives specific to Illinois.
Cost of Living in Illinois
Tax rates are only part of the picture — explore city-level cost of living data:
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