Illinois Tax Brackets 2025
Illinois state income tax rates for tax year 2025 — a flat 4.95% on all taxable income.
Tax year
2025
Type
Flat
Rate range
Flat 4.95%
Brackets
1
Illinois state tax at common incomes (2025)
| Taxable income | Single — tax | Single — effective | MFJ — tax | MFJ — effective |
|---|---|---|---|---|
| $50,000 | $2,475 | 4.95% | $2,475 | 4.95% |
| $75,000 | $3,713 | 4.95% | $3,713 | 4.95% |
| $100,000 | $4,950 | 4.95% | $4,950 | 4.95% |
| $150,000 | $7,425 | 4.95% | $7,425 | 4.95% |
| $250,000 | $12,375 | 4.95% | $12,375 | 4.95% |
| $500,000 | $24,750 | 4.95% | $24,750 | 4.95% |
State income tax only. Excludes federal tax, FICA, and local/city taxes. Assumes taxable income (after deductions).
About Illinois's 2025 rates
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.
Frequently asked questions
What are the Illinois tax brackets for 2025?
Illinois has a flat state income tax of 4.95% for tax year 2025 — applied to all taxable income regardless of filing status.
What is the top Illinois income tax rate in 2025?
4.95%.
How much Illinois state tax on $100,000 in 2025?
A single filer with $100,000 of taxable income owes $4,950 in Illinois state income tax for 2025 — an effective rate of 4.95%. Married filing jointly with the same income owes $4,950 (4.95% effective). Federal tax is separate.
Are Illinois 2025 tax brackets the same as 2024?
Bracket thresholds may have changed for 2025 via inflation indexing or legislative action. The figures on this page are the Illinois bracket thresholds in effect for tax year 2025.