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How do I figure the amount of Illinois income tax to withhold for my employees?

 

To determine how much Illinois income tax you must withhold for each employee, see Booklet IL-700-T, Illinois Withholding Tax Tables. The amount you must withhold is determined by the current income tax rate and exemption allowance.

Note: To correctly calculate the amount of Illinois income tax withheld, you must have a Form IL-W-4, Employee's and other Payee's Illinois Withholding Allowance Certificate and Instructions, on file for each employee.

 For additional information on how to calculate Illinois income tax withholding and credits, see the following resources:

You may access additional information by searching the entire Illinois Department of Revenue website.

If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.