Illinois W-2 filing with the Department of Revenue

File copies of the W-2s electronically through MyTax Illinois by January 31 and keep withholding payments on the schedule the Department assigned; the quarterly Form IL-941 closes each quarter and there is no annual reconciliation form.

When: By January 31 each year.
Agency: Illinois Department of Revenue
Form: Forms W-2 through MyTax Illinois
Applies to: Every company with employees in Illinois, with 1 or more employees.
Source: tax.illinois.gov, read October 22, 2026

Jay explains

Illinois dropped its annual withholding reconciliation in 2017. Employers file Form IL-941 every quarter, by the last day of the month after the quarter, and send the W-2 copies to the Department of Revenue electronically by January 31. A payroll provider does both.

Next dates

For a calendar year company. Shown as the agency states them; if a date falls on a weekend, file before it.

January 31, 2027
January 31, 2028

A payroll provider normally prepares and files this. Obligare shows it anyway, marked as the provider's, because the company stays liable if it is missed.

Also in Illinois

Illinois annual report and franchise tax Illinois annual report Illinois annual report Illinois nonprofit annual report Illinois charitable organization annual report Illinois corporate income tax return Illinois corporate estimated tax payment Illinois S corporation return Illinois partnership return Illinois personal income tax return with business income Illinois unemployment insurance wage report Illinois harassment prevention training

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