Who Needs Workers' Comp in Illinois?
Under the Illinois Workers' Compensation Act (820 ILCS 305), all employers must provide workers' compensation coverage for their employees. There is no minimum employee threshold — hiring even one part-time, temporary, or seasonal worker triggers the requirement. The only exceptions are sole proprietors and business partners who have no employees.
Penalties for Non-Compliance
Illinois treats non-compliance seriously. Failure to carry workers' comp is a Class 4 felony for corporate officers and can result in fines of $500 for every day of non-compliance, with a minimum penalty of $10,000. The Illinois Workers' Compensation Commission can issue stop-work orders, and individual officers and directors can be held personally liable for penalties and employee injury costs.
How Illinois Rates Work
Illinois uses NCCI class codes and operates as a competitive rating state. Carriers file their own rates with the Illinois Department of Insurance, which means premiums can vary significantly between carriers. Your rate is determined by your classification code, payroll, experience modification rate, and carrier-specific factors. Illinois has historically had higher-than-average workers' comp costs, making it especially important to shop multiple carriers.
Common Illinois Class Codes
| Code | Description | Risk Level |
|---|---|---|
| 8810 | Clerical Office Employees | Low |
| 8742 | Outside Salespersons | Low |
| 9101 | Restaurant NOC | Medium |
| 5183 | Plumbing NOC | Medium |
| 3507 | Construction Machinery Mfg | Medium |
| 5403 | Carpentry NOC | Medium-High |
| 5551 | Roofing — All Kinds | High |
Reducing Your Illinois Workers' Comp Costs
Illinois has historically been one of the more expensive states for workers' comp, though legislative reforms have brought rates down in recent years. The most effective strategies for reducing your premium include maintaining a strong safety program, managing your experience modification rate, ensuring correct employee classifications, and comparing quotes from multiple carriers. Illinois also offers a self-insurance option for qualified large employers.