Illinois Income Tax 2026
Estimate onlyIllinois taxes income at a single flat rate of 4.95%. See the full 2026 bracket table below and estimate your Illinois income tax in seconds.
Reviewed by the TryClearTally editorial team · Last updated July 4, 2026 · Methodology & sources
Tax structure
flat
Top rate
4.95%
Rate
4.95%
Estimate your Illinois income tax
Your income after deductions.
Estimated Illinois tax
$3,713
4.95% effective rate
Marginal rate
4.95%
On your last dollar
Effective rate
4.95%
Tax ÷ taxable income
Based on Illinois's single-filer schedule. Married-filing-jointly brackets differ in some states, and this ignores state-specific deductions, exemptions, credits, and local taxes. Estimate only, not tax advice.
Illinois income tax rate (2026)
Single-filer schedule. Each rate applies only to the income within its range.
| Rate | Taxable income |
|---|---|
| 4.95% | All taxable income |
About Illinois income tax
Illinois taxes income at a single flat rate of 4.95%. Because the system is flat, every dollar of taxable income is taxed at the same 4.95% rate.
This page applies Illinois's published single-filer brackets to the income you enter. It doesn't include Illinois's own standard deduction, personal exemptions, or credits, which can lower your actual bill. For your full paycheck picture, combine this with federal tax using our Take-Home Pay Calculator.
FAQ
Illinois uses a flat 4.95% on taxable income (single-filer schedule).
Illinois figures use the 2026 tax year (PayrollTax API). Estimates for planning only, not tax advice. See https://trycleartally.com/disclaimer.