Estimate Illinois state income tax on taxable wage income.
This is an illustrative estimate of Illinois state income tax based on an approximate top marginal rate. It does not reproduce the state's full bracket structure, deductions or credits. Always confirm the current Illinois rules with the official state tax authority.
Illustrative estimate
Estimated tax ≈ taxable income × approximate top marginal rate
Illustrative reference estimate only — not an official tax figure. Verify with the official state source.
No. This uses an approximate top marginal rate for guidance. State rules, brackets, deductions and credits vary, so verify with the official state tax department before relying on the number.
Consult the official state revenue or taxation department website, which publishes current brackets and rates.