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Workers’ Compensation Insurance Requirements in Illinois
Illinois requires workers’ comp from your first employee and treats willful noncompliance as a felony, with fines starting at $10,000. Trade Safe helps roofing, electrical, and plumbing contractors get covered before the risk starts.
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Workers’ Compensation Insurance Requirements in Illinois
Illinois has some of the strictest workers’ comp enforcement in the country, and roofing contractors face an extra layer of scrutiny through the state’s roofing licensing law. The Illinois Workers’ Compensation Commission requires coverage from your very first hire, part-time included, and treats knowing noncompliance as a Class 4 felony with fines running into the tens of thousands of dollars. For contractors already paying above-median premiums, getting the paperwork and coverage right the first time matters as much as the policy itself.
Illinois Workers’ Compensation Legal Requirements
The Illinois Workers’ Compensation Act, 820 ILCS 305, requires every employer with one or more employees to carry coverage, with no minimum headcount exemption, enforced by the Illinois Workers’ Compensation Commission.
- Coverage is mandatory from employee #1, including part-time workers, under 820 ILCS 305.
- Sole proprietors, partners, and LLC members may elect not to cover themselves, but that election never extends to any employees they hire.
- Knowing failure to carry coverage is a Class 4 felony per day of noncompliance (1-3 years imprisonment, up to $25,000 fine), plus civil fines starting at $10,000 minimum ($500/day) and $20,000 minimum ($1,000/day) for repeat violations.
- Roofing contractors must submit a workers’ comp certificate of insurance (or IWCC self-insurance approval) to get licensed under the Illinois Roofing Industry Licensing Act, unless they’re a zero-employee sole proprietorship or partnership.
How Illinois’s Workers’ Comp System Works
System type: Private Carrier Market
Illinois is a private-carrier competitive state with no state-fund monopoly; employers buy coverage from licensed insurers or qualify as a certified self-insurer through the IWCC. In the 2024 Oregon DCBS rate study, Illinois ranked 13th of 51 states overall, with an index rate at 123% of the national median, making it a meaningfully above-average state for workers’ comp costs.
How Illinois’s Rates Compare by Trade
| Trade (NCCI Class Code) | National Rank (of 51) | Rate per $100 of Payroll |
|---|---|---|
| Roofing (Class 5551) | 14th of 51 | $13.44 |
| Electrical Wiring (Class 5190) | 4th of 51 | $3.38 |
| Plumbing NOC (Class 5183) | 8th of 51 | $3.69 |
Source: Oregon Dept. of Consumer and Business Services, 2024 Workers’ Compensation Premium Rate Ranking Study (published June 2025) — the only study benchmarking all 50 states plus DC on a common industry mix.
Filing a Workers’ Comp Claim in Illinois
Injured employees or employers report the claim to the insurance carrier, which must begin providing medical care and wage-replacement benefits without the worker having to prove fault, with disputes resolved through the Illinois Workers’ Compensation Commission’s arbitration process. Because the Employee Classification Act specifically targets construction-industry misclassification, a claim involving a roofing, electrical, or plumbing worker labeled an independent contractor often triggers additional IWCC and Department of Labor scrutiny of the employment relationship.
Penalties for Non-Compliance
Willful failure to carry coverage is a Class 4 felony per day in Illinois, carrying 1-3 years imprisonment and up to $25,000 in fines, on top of civil penalties starting at $10,000 minimum ($500/day) that double for repeat violations, and the IWCC can issue a work-stop order treating uninsured operation as an immediate public-safety danger.
Resources: Illinois Workers’ Compensation Commission – Insurance Requirements, IWCC Workers’ Compensation Fraud Act, 820 ILCS 305 – Illinois Workers’ Compensation Act
How Much Does Workers’ Comp Insurance Cost in Illinois?
Illinois runs above the national median across all three trades, with roofing costing the most per $100 of payroll. Your actual premium depends on payroll, claims history, and experience modifier.
| Trade | Estimated Cost per $100 Payroll | What Drives It |
|---|---|---|
| Roofing | $13.44 (per the Oregon study’s Class 5551 rate) | High fall-risk exposure combined with Illinois’s above-median statewide claims environment |
| Electrical | $3.38 (per the Oregon study’s Class 5190 rate) | Shock and fall hazards, with Illinois ranking among the higher-cost states nationally for this trade |
| Plumbing | $3.69 (per the Oregon study’s Class 5183 rate) | Strain and laceration risk pushed higher by Illinois’s overall elevated rate environment |
What Moves the Price Up or Down
- Illinois’s overall index rate ranked 13th of 51 states, at 123% of the national median, so baseline costs run above average
- Experience modifier and claims history materially affect your premium relative to the base class rate
- Correct worker classification matters: misclassifying employees as independent contractors under the Employee Classification Act invites audits and retroactive premium assessments
- Roofing contractors specifically should budget for the certificate-of-insurance requirement tied to state licensing
Rates cited are from the Oregon DCBS 2024 Workers’ Compensation Premium Rate Ranking Study and represent base class-code rates, not a quote. Your actual premium depends on experience modification, claims history, and payroll — get a Trade Safe quote for an accurate number.
Frequently Asked Questions
Does Illinois require workers’ comp for one part-time employee?
Yes. Illinois requires coverage from your first employee, including part-time workers, under 820 ILCS 305, with no minimum headcount exemption.
Can a sole proprietor skip coverage on themselves in Illinois?
Yes, sole proprietors, partners, and LLC members can elect not to cover themselves, but that exclusion never applies to any employees they hire.
What happens if I willfully operate uninsured in Illinois?
Willful noncompliance is a Class 4 felony per day, punishable by 1-3 years in prison and up to $25,000 in fines, plus civil penalties starting at a $10,000 minimum.
Do roofing contractors need proof of workers’ comp to get licensed in Illinois?
Yes, under the Illinois Roofing Industry Licensing Act, roofing license applicants must submit a certificate of workers’ comp insurance or IWCC self-insurance approval, unless they’re a zero-employee sole proprietorship or partnership.
Workers’ comp requirements and rates change; verify current rules with the Illinois Workers’ Compensation Commission.
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