Illinois OSHA Guide: Which Safety Law Covers Employers
Plain-English guide to Illinois OSHA: federal OSHA covers private employers, IL OSHA covers public ones. Slides, a coverage table and tax and payroll notes.
Last reviewed October 29, 2026 · General information, not legal advice
General information only, not legal advice. CPA Tax Payroll and Accounting Corp is a CPA firm, not a law firm. Laws change: confirm with the official source or a licensed attorney before you act. Read the full notice.
Two safety agencies work in Illinois, and which one applies depends on who the employer is. Private businesses answer to federal OSHA, the Occupational Safety and Health Administration. State and local governments, school districts and public universities answer to Illinois OSHA (IL OSHA), a division of the Illinois Department of Labor that enforces the state's Occupational Safety and Health Act, 820 ILCS 219. This guide is for owners and managers working out which rules reach their workplace.
Slide show: Illinois workplace safety in seven slides
What the law does
Federal and Illinois laws both require a workplace free from recognized hazards likely to cause death or serious physical harm.
Who it covers
Two agencies split Illinois by employer type. Private employers, including small ones, answer to federal OSHA, not to Illinois.
The rule
IL OSHA covers state and local governments, schools and public universities under 820 ILCS 219. The state plan covers only them.
The number
Federal maximums in 2026 are $16,550 per serious violation and $165,514 for willful or repeat violations. There was no 2026 inflation increase.
The deadline
A public employer has 15 working days to contest an IL OSHA citation, or it becomes final.
The penalty
Illinois public employers face up to $1,000 per serious violation and up to $10,000 for repeated or intentional ones. IL OSHA does not fine private businesses.
A tip
Small and medium-sized private businesses can use the free, confidential Illinois On-Site Consultation Program. It advises rather than enforces, though an employer that refuses to fix serious hazards can be referred for enforcement.
Federal OSHA. IL OSHA's own site says federal OSHA covers all private sector workplaces
State, counties, cities, villages, townships, school districts, other public bodies, public university staff
IL OSHA under 820 ILCS 219
Federal agencies, Postal Service, maritime employers, military sites, tribal-sovereignty workplaces
Federal OSHA, as IL OSHA's site lists them
Conditions a federal agency already regulates, such as under the Atomic Energy Act
The Illinois Act does not apply
Private sector, only for an issue where a federal standard is repealed or revoked after August 14, 2025 and no federal standard covers it
The Illinois Safe and Healthy Workplace Act (820 ILCS 226) tells IDOL to adopt rules carrying over the old standard. We found no such rule
How it touches your taxes and payroll
A fine or penalty paid to a government for breaking a law is generally not deductible, with statutory exceptions; the cost of fixing a hazard or buying safety equipment is a separate question for a preparer. Under federal OSHA's rule, injury and illness records stay on file for 5 years after the covered calendar year, longer than the 4-year federal employment-tax period and the 3-year Illinois pay stub period. See workers' compensation basics, how long to keep tax records and Illinois state pages.
