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Date: July 20, 2017

Bulletin Number: 1580

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Subject Illinois Income Tax Withholding Rate Change

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.