Illinois State Withholding Rate Increased
On January 13, 2011 the Governor of Illinois, Pat Quinn, signed into law a 66% state income tax increase effective immediately. The personal income tax rate will increase from 3.0% to 5.0%. This increase will be effective until December 31, 2014.
Employers are not required to adjust employee's paychecks already paid in January. The employee may request an additional amount withheld to catch up through payroll.
Paycor has updated its system to reflect the new rate of 5.0% effective immediately.
The following links also provide helpful information: