How Illinois taxes your paycheck
This page estimates the Illinois income tax taken from your pay in 2026. Illinois uses one flat rate, 4.95%, for everyone.
Illinois has no standard deduction. Instead, you subtract an exemption of $2,925 for yourself, your spouse and each dependent. If your federal income is over $250,000, or $500,000 for a joint return, you lose the exemption. Illinois has no state disability or paid leave tax, and no local income tax.
Here is an example. A single person earns $60,000 and puts $3,000 in a 401(k). Illinois taxes $57,000 minus $2,925, which is $54,075. At 4.95%, that is about $2,676.71 for the year.
Illinois tax rates and rules for 2026
Illinois taxes wages at one flat rate of 4.95%.
- Starts from
- Wages after pre-tax deductions
- 401(k) contributions
- Lower your state taxable wages
- Exemption
- $2,925 per filer ($5,850 for a joint return); plus $2,925 per dependent
Local taxes
No local income tax on wages.
What this estimate leaves out
- The exemption allowance is lost entirely when federal AGI is over $250,000, or over $500,000 for married filing jointly.
- The extra $1,000 exemption for age 65 or older or blindness, and Illinois credits such as the property tax and child tax credits, are left out.
- Illinois doesn't tax most retirement income, which matters for retirees but not for wages.
Frequently asked questions
What is the Illinois income tax rate for 2026?
It is a flat 4.95%. The rate is the same at every income level.
What is the Illinois exemption for 2026?
It is $2,925 per person, for you, your spouse and each dependent. It goes away completely if your federal adjusted gross income is over $250,000, or $500,000 if married filing jointly.
Does Illinois tax 401(k) contributions?
No. Illinois starts from your federal adjusted gross income, so traditional 401(k) and 403(b) contributions lower your Illinois taxable income.
Does Chicago have a city income tax?
No. Chicago and other Illinois cities don't tax wages, so your paycheck only shows the state income tax.
Sources
- Illinois DOR Bulletin FY 2026-15: What's new for 2026 ($2,925 exemption)
- Illinois DOR: 2026 Booklet IL-700-T withholding tables (4.95%)
- Illinois DOR: What is the Illinois personal exemption allowance? (income limits)
Figures checked 2026-10-25. The federal side uses the same 2026 rules as the main paycheck calculator, where the formula and method are explained. Found a problem? Tell us.