How Illinois treats wage income
Illinois taxes individual income through a flat rate structure, so wage income can be subject to state tax. The exact liability depends on state deductions, exemptions, credits, residency, and local taxes, which is why Afterax keeps this page as an information profile.
Important context before you rely on this profile
- The statewide rate is 4.95%. Illinois uses exemptions rather than a standard deduction.
- Afterax currently provides a profile only and does not calculate this state liability.
Model the federal result next
Federal income and payroll tax apply in every state. Enter W-2 wages in the federal calculators, then handle Illinois treatment separately using the caveats above.
- Federal income tax calculator2025 final values with a labeled 2026 planning estimate.
- Federal take home pay calculatorAnnual federal net converted to monthly, biweekly, and hourly averages.
- State income tax guideResidency, reciprocity, and local tax cautions across all states.
- Salary after tax examplesSimplified 2025 federal examples for common W-2 salaries.
Sources
Cross-state source published 2026-02-17. Profile reviewed 2026-07-24.
Frequently asked questions
Does Illinois tax W-2 wage income?
Illinois taxes individual income through a flat rate structure, so wage income can be subject to state tax. The exact liability depends on state deductions, exemptions, credits, residency, and local taxes, which is why Afterax keeps this page as an information profile.
Does Afterax calculate my Illinois state tax?
Afterax does not calculate Illinois state liability. Use this profile to understand the structure, then model the federal result with the income tax or take home pay calculator and prepare the state return separately.
Do local income taxes apply in Illinois?
No broad local wage tax was identified for Illinois in the 2026 cross-state research snapshot. Confirm the position for the specific work and residence location before treating local tax as zero.