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The State of Illinois will be performing maintenance on this site Sunday December 14, 2025 between 4AM and 10AM.  Individuals filing an unemployment insurance claim may experience an interruption and should attempt to file later in the day. Thank you for your patience during this time.

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Quarterly Filing Requirements

Employers must file wage reports (Form UI-3/40​) and pay contributions in the month after the close of each calendar quarter - that is, on or before April 30, July 31, October 31, and January 31. 

It is an employer’s responsibility to file the proper forms on time either electronically or via obtaining paper forms on this site. Governmental organizations and some non-profits are also required to file wage reports, although they may have an option to reimburse IDES for benefits paid rather than making quarterly contributions.

If filing via printed forms obtained from this website, mail the completed forms and payments to:

IDES P.O. Box 19300

Springfield, Illinois  62794-9300

Visit the Contact IDES page for more information or call the Employer Services Hotline at 800-247-4984. The Tax Hotline TTY number is 866-212-8831.