Key Takeaways

  • Illinois follows a modified comparative negligence system with a 50% bar for fault allocation
  • Commercial general liability policies use file and use rate regulation
  • Joint and several liability applies when defendants are more than 25% at fault
  • Professional liability insurance is required for certain licensed professions
  • Punitive damages insurability is limited in Illinois based on public policy
Last updated: January 2026

Illinois General Liability Insurance

Illinois has specific requirements for general liability insurance that agents must understand.

Modified Comparative Negligence

Illinois uses modified comparative negligence with a 50% bar:

How It Works

  • Fault is allocated among all parties
  • Damages reduced by percentage of fault
  • 50% Rule: If 50% or more at fault, NO recovery
  • Joint and several liability modified

Joint and Several Liability

Illinois modified joint and several liability (735 ILCS 5/2-1117):

Defendant FaultLiability Rule
More than 25% responsibleJoint and several liability
25% or less responsibleSeveral liability only (their share)

Exam Tip: Illinois uses 25% threshold for joint and several liability, not 50%. This is different from some other states.

Commercial General Liability (CGL)

Illinois CGL policies must comply with state requirements:

Required Elements

  • Occurrence vs. claims-made coverage clearly disclosed
  • Coverage territory defined
  • Limits per occurrence and aggregate
  • Defense costs—duty to defend
  • Pollution exclusion with disclosure

Rate Regulation

Under file and use:

  • Rates filed with DOI
  • Can be used immediately
  • Subject to post-implementation review
  • Must be actuarially justified

Professional Liability

Illinois requires or regulates professional liability for various professions:

State-Mandated Coverage

ProfessionRequirement
AttorneysARDC requires disclosure if no coverage
PhysiciansMedical malpractice coverage common
ArchitectsE&O for licensed practice
EngineersE&O for licensed practice
Real Estate AgentsE&O recommended
Insurance AgentsE&O recommended

Pollution Liability

Illinois has specific environmental liability requirements:

Disclosure Requirements

  • Pollution exclusion must be disclosed
  • Environmental impairment liability options explained
  • Underground storage tank regulations (Illinois EPA)
  • Cleanup cost coverage options

Illinois Environmental Laws

  • Illinois Environmental Protection Act applies
  • Illinois EPA oversight
  • Strict liability for certain hazardous activities
  • Site cleanup requirements under state law

Punitive Damages

Illinois has restrictions on insuring punitive damages:

Illinois Rule

FeatureDetails
InsurabilityLimited—public policy concerns
Direct PunitiveGenerally NOT insurable
Vicarious PunitiveMay be insurable in some cases
CoverageDepends on policy language and circumstances

Key Differences

  • Illinois is more restrictive than states like Texas
  • Direct punitive damages generally uninsurable
  • Vicarious liability punitive damages—case by case
  • Policy language and facts control coverage

Products Liability

Illinois products liability insurance:

Coverage

  • Bodily injury from defective products
  • Property damage from defective products
  • Products-completed operations hazard
  • Aggregate limits apply

Illinois Law

  • Strict liability for manufacturing defects (Restatement)
  • Negligence for design defects
  • Failure to warn claims common
  • Statute of repose: 12 years for products (with exceptions)
Test Your Knowledge

At what percentage of fault does joint and several liability apply in Illinois?

A
B
C
D
Test Your Knowledge

Are punitive damages generally insurable in Illinois?

A
B
C
D