Workers' Comp in Illinois
Everything you need to know about filing a workers' compensation claim in Illinois (IL).
Ready to File Your Claim?
Answer guided questions and get your complete document package — claim summary, employer letter, medical records request, and more.
Start Your Claim — FreeKey Form
IC45
Filing Deadline
1095 days
Submit To
Illinois Workers' Compensation Commission
Filing Deadlines
Report to employer45 days
Notify your employer of your injury within 45 days.
File claim1095 days
File an Application for Adjustment of Claim with the Illinois Workers' Compensation Commission within 3 years.
Appeal denialSee details
You can file for a hearing before an Arbitrator. Appeal the arbitrator's decision to the full Commission within 30 days.
Required Forms
IC45— Application for Adjustment of Claim
Download ↗Key Rules in Illinois
- All Illinois employers must carry workers' comp insurance (no exceptions).
- Illinois has one of the highest denial rates — document everything thoroughly.
- You have the right to choose your own doctor (up to 2 choices).
- Your employer cannot retaliate against you for filing a claim (820 ILCS 305/4(h)).
Where to File
File an Application for Adjustment of Claim with the Illinois Workers' Compensation Commission (IWCC).
Illinois Workers' Compensation Commission (IWCC) Official Website ↗