Cal/OSHA Serious Injury Reporting: The 8-Hour Rule for Employers
A California employer has to report a serious workplace injury, serious illness, or death to Cal/OSHA right away, and “right away” has a number attached. Under 8 CCR section 342, the report is due “as soon as practically possible but not longer than 8 hours after the employer knows or with diligent inquiry would have known” of it. A late or missed report carries its own penalty, separate from any citation for the hazard that caused the injury.
What injuries have to be reported to Cal/OSHA?
Serious ones, as the Labor Code defines them. Labor Code section 6302(h) defines a “serious injury or illness” as one occurring at work or in connection with employment “that requires inpatient hospitalization, for other than medical observation or diagnostic testing, or in which an employee suffers an amputation, the loss of an eye, or any serious degree of permanent disfigurement.” The regulation uses the same definition in 8 CCR section 330(h).
The definition has a limit employers should know about. It “does not include any injury or illness or death caused by an accident on a public street or highway, unless the accident occurred in a construction zone,” according to section 6302(h). A delivery driver hurt in an ordinary traffic collision usually falls outside the reporting rule. A flagger struck in a work zone doesn’t.
What changed in 2026?
The definition got broader. Senate Bill 20 (Stats. 2025, ch. 734), effective January 1, 2026, added a sentence to section 6302(h): “‘Serious injury or illness’ includes silicosis and silica-related lung cancer.”
That matters for fabrication shops, countertop installers, and other employers whose work generates silica dust. A silicosis diagnosis doesn’t look like the sudden accident most reporting procedures are written for, so it’s easy for it to reach HR through a workers’ compensation claim and never reach the person who makes the Cal/OSHA call. Employers in those industries should update their written procedures so a diagnosis triggers the same review as a hospitalization.
How fast does the report have to be made, and how?
Within hours. Labor Code section 6409.1(b) requires that in every case involving a serious injury or illness, or death, “a report shall be made immediately by the employer to the Division of Occupational Safety and Health by telephone or through a specified online mechanism established by the division for this purpose.”
The regulation sets the clock. Section 342(a) defines immediately as no later than 8 hours after the employer knows or should have known, and adds an exception: “If the employer can demonstrate that exigent circumstances exist, the time frame for the report may be made no longer than 24 hours after the incident.” The burden of proving exigent circumstances is on the employer, so it’s a poor plan to rely on.
The “diligent inquiry” language deserves attention. The clock can start before senior management hears about the injury, if a supervisor on site knew or should have known that an employee was admitted to the hospital.
What information goes in the report?
Section 342(c) lists what the reporting party “shall include,” if available. The list covers the time and date of the accident, the employer’s contact information, the reporter’s name and job title, the site address, a contact person at the site, the injured employee’s name and address, the nature of the injury, where the employee was taken, other agencies at the scene, and a “Description of accident and whether the accident scene or instrumentality has been altered,” according to the regulation.
That last item is the one to think about before calling. The answer becomes part of the Cal/OSHA file, and an inspector will compare it with what they find. Accurate and short is better than speculative and detailed.
What’s the penalty for not reporting?
At least $5,000. Under section 6409.1(b), “An employer who violates this subdivision may be assessed a civil penalty of not less than five thousand dollars ($5,000).” The statute also says that nothing in the subdivision increases the maximum civil penalty available under the general Cal/OSHA penalty provisions.
The bigger cost often follows the report. Labor Code section 6313(a) says the division “shall investigate the causes of any employment accident that is fatal to one or more employees or that results in a serious injury or illness, or a serious exposure, unless it determines that an investigation is unnecessary.” A reportable injury is often the start of an inspection, and the inspection is where citations for the underlying hazard come from.
How do the reporting duties fit together?
| Duty | Source | Trigger | Deadline |
|---|---|---|---|
| Immediate report to Cal/OSHA | Lab. Code § 6409.1(b); 8 CCR § 342(a) | Serious injury or illness, or death | Within 8 hours, or 24 with proven exigent circumstances |
| Employer’s report of occupational injury | Lab. Code § 6409.1(a) | Lost time beyond the day of injury, or treatment beyond first aid | Within five days after the employer learns of it |
| Amended report after death | Lab. Code § 6409.1(a) | Death of an employee whose injury was already reported | Within five days after the employer learns of the death |
| Cal/OSHA investigation | Lab. Code § 6313(a) | Fatality, serious injury or illness, or serious exposure | Unless the division finds it unnecessary |
Can an employer discipline an employee for reporting an injury?
No, and this is where an injury report can turn into an employment lawsuit. Labor Code section 6310(a)(4) prohibits discharging or discriminating against an employee who “Reported a work-related fatality, injury, or illness.” Complaints about unsafe conditions are protected too, under section 6310(a)(1).
Retaliation over a workers’ compensation claim itself belongs before the Workers’ Compensation Appeals Board under Labor Code section 132a, a carve-out written into section 6310(a)(4). Discipline after an injury for a real safety rule violation is possible, but it should follow a consistent written policy and be documented separately from the injury report.
What should an employer do after a serious workplace injury?
- Preserve the scene and the records once the injured employee has care: photos, equipment, maintenance logs, training records, the injury and illness prevention program, and any texts or emails about the incident.
- Calendar the 8-hour Cal/OSHA reporting window from the moment a supervisor learned of the injury, and the five-day deadline for the employer’s report of injury.
- Identify the witnesses and the supervisors on site, and make sure nobody disciplines or threatens the injured employee or any coworker who complained about safety.
- Pull the documents an inspector will ask for, including prior citations, safety meeting records, and the written procedures for the task involved.
- Talk to a lawyer before the Cal/OSHA inspection or any recorded interview, and before giving statements to an insurer or the employee’s representatives.
Employers facing a Cal/OSHA inspection or a related claim can learn more about California employment defense on the firm’s employment defense page.
Cal/OSHA reporting questions from California employers
Do we have to report if the employee was only kept overnight for observation?
Not on that basis alone. The definition covers inpatient hospitalization “for other than medical observation or diagnostic testing.” If the employee was admitted only to be watched or tested and then released, the hospitalization part of the definition isn’t met. If the hospital starts treatment, the answer can change, so get the facts from the hospital or the employee’s family quickly.
Who should make the call?
Anyone the employer authorizes. Section 342(d) says the report may be made by any person authorized by the employer. The safest approach is to name a primary and a backup in the written procedure, including for nights and weekends, so the 8-hour window isn’t lost because the one person who knows the process is unavailable.
Does reporting the injury admit that the company did something wrong?
No. The report is a statutory duty triggered by the injury, not a finding of fault. What the reporter says about how the accident happened can still be used later, so the description should stick to known facts. Fault and cause are questions for the investigation.
Is the workers’ compensation claim form the same as the Cal/OSHA report?
No. The employer’s report of injury under section 6409.1(a) is filed with the Department of Industrial Relations or the insurer within five days. The serious injury report under section 6409.1(b) goes directly to Cal/OSHA immediately, and it’s required on top of the other report. Filing one doesn’t satisfy the other.
If your company is facing a Cal/OSHA inspection after a workplace injury
If your company has had a serious workplace injury and Cal/OSHA is asking questions, the timing of the report and the records behind it often shape the rest of the case. Rosenberger + Kawabata represents employers defending employment lawsuits and claims through its business litigation practice, including claims involving workplace injuries and safety retaliation. Contact Rosenberger + Kawabata online for a confidential consultation, or call (310) 894-6921.
Sources
The statutes are Labor Code section 6302, as amended by Senate Bill 20 (Stats. 2025, ch. 734), effective January 1, 2026, Labor Code section 6409.1, Labor Code section 6313, and Labor Code section 6310. The regulations are California Code of Regulations, title 8, section 342 and section 330.
This post is general information about California and federal employment law as of November 7, 2026. It is not legal advice, and reading it does not create an attorney-client relationship. Employment statutes, regulations, and court decisions change often, and the outcome of any claim depends on its facts. Past results do not guarantee future outcomes.