Tools · State Income Tax
Illinois Income Tax Calculator (2026)
Estimate your Illinois state income tax for 2026. Enter your taxable income and filing status to see what Illinois taxes and your effective state rate, broken out line by line.
Illinois state income tax calculator
- Taxable income entered
- $75,000
- Personal exemption
- −$2,925
- Income taxed by Illinois
- $72,075
- Illinois income tax
- $3,568
Illinois taxes income at a flat 4.95%. It has no standard deduction, but allows a $2,925 personal exemption per person (2026).
State figures: Illinois Department of Revenue.
Estimate for 2026 state income tax only, based on annual tax brackets — it excludes federal income tax, Social Security and Medicare, local taxes, and any credits. This is general information, not tax advice.
How Illinois income tax is figured
Illinois applies a single flat rate to your taxable income (after any state deduction or exemption). Illinois taxes income at a flat 4.95%. It has no standard deduction, but allows a $2,925 personal exemption per person (2026).
This estimate covers state income tax only — it does not include federal income tax, Social Security and Medicare, or tax credits. It is an annual-bracket estimate, not your final return. This is general information, not tax advice.
Income tax calculators for other states
Same 2026 engine, each with its own state rules.