State Agencies Bulletin No. 1580

Subject
Illinois Income Tax Withholding Rate Change
Date Issued
July 20, 2017

Purpose

To inform agencies of the change in the Illinois income tax withholding rate.

Affected Employees

Employees who live and work in the State of Illinois

Background

Effective July 1, 2017, the Illinois income and supplemental tax rates will increase from 3.75% to 4.95%.

Effective Date(s)

Institution paychecks dated July 20, 2017
Administration paychecks dated July 26, 2017

Agency Actions

Notify affected Employees.

OSC Actions

OSC will update the Illinois withholding tax table with the new withholding rate percentage of 4.95 percent (.0495).

Questions

Questions regarding this bulletin may emailed to the Tax and Compliance Mailbox.