Illinois Income Tax Rates 2025
Illinois has a flat income tax rate of 4.95% on all taxable income, regardless of how much you earn. The Illinois Constitution requires a flat rate, so all taxpayers pay the same percentage.
Tax Type
Flat
Rate Range
4.95% flat
Brackets
1
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Illinois is only part of the equation — federal taxes apply too.
State Tax Ranking
At $75,000 income (single filer), Illinois ranks #36 out of 51 states — where #1 is the lowest tax burden.
Best states to move to from Illinois →Tax at Different Income Levels
| Income | State Tax | Effective Rate | Take-Home |
|---|---|---|---|
| $50,000 | $2,475 | 4.95% | $43,654 |
| $75,000 | $3,713 | 4.95% | $63,339 |
| $100,000 | $4,950 | 4.95% | $81,601 |
| $150,000 | $7,425 | 4.95% | $117,508 |
| $200,000 | $9,900 | 4.95% | $153,033 |
Single filer, standard deduction, 2025 tax year. Take-home is after federal + state income tax (excludes FICA).
Tax Overview
Illinois has a flat income tax rate of 4.95% on all taxable income. While the rate is moderate compared to states like California or New York, Illinois's high property taxes (average ~2.08%, second-highest nationally) significantly increase the total tax burden, particularly for homeowners.
Tax Planning Tip
The flat 4.95% rate means your effective state tax rate is close to 4.95% regardless of income — no progressive bracket benefit. Property taxes in Cook County (Chicago) can exceed $6,000-$10,000 on a median-value home.
With a flat tax, your Illinois state income tax is simply 4.95% of your taxable income. Illinois does not tax retirement income, including Social Security, pensions, and distributions from 401(k) and IRA accounts.
Property Tax & Cost of Living
Property tax rate is the state average effective rate. Actual rates vary by county. COL index from BEA Regional Price Parities.
Compare Illinois
Indiana
3.05% flat
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Florida
No income tax
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Texas
No income tax
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Wisconsin
3.5% – 7.65%
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Arkansas
2% – 3.9%
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Ohio
0% – 3.5%
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California
1% – 13.3%
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New York
4% – 10.9%
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Moving to or from Illinois
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Frequently asked questions
What is Illinois's income tax rate in 2025?
Illinois has a flat income tax rate of 4.95% on all taxable income, regardless of how much you earn.
Does Illinois tax Social Security benefits?
Illinois does not tax Social Security benefits, pensions, or distributions from 401(k) and IRA accounts at the state level.