Illinois payroll tax form information

Alerts and notices

Select a state from the drop-down list or visit the State-specific payroll tax form information topic to view payroll tax form information for that state.

Unemployment forms

Agency: Illinois Director of Employment Security

Website: http://www.ides.state.il.us/

Description Approval Information Filing Methods Web fill-in Form Due Date
UI-3/40 No approval required Paper, Electronic No Last day of the following month*

* Due date adjusts for non-banking days

Withholding forms

Agency: Illinois Department of Revenue

Website: http://tax.illinois.gov/

Description Approval Information Filing Methods Web fill-in Form Due Date
IL-501 Approved for 2019 Paper, Electronic Yes 15th of the following month*
IL-941 Non-submittable only Web fill-in, Electronic Yes Last day of the following month*
W-2 Copy 1 Available up to 2019 (No approval required) Internet No January 31st*

* Due date adjusts for non-banking days

Form processing tips

E-filing notes

State ID formats

Unemployment ID: 8 digits formatted #######-#

Withholding ID: Must match the federal EIN

New hire reporting

Reporting methods

File Upload Type: Internet

General reporting requirements

Electronic filing required: No
Filing frequency: 20 days from hire date
Registration required: No

Website: http://www.ides.illinois.gov/Pages/New_Hire_Reporting.aspx

Related topics

State-specific payroll tax form information

Processing state payroll tax forms

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