Cal/OSHA Reporting Requirements: 8-Hour Deadline and Penalties

California employers have eight hours to report any serious workplace injury, illness, or death to Cal/OSHA once they know, or with reasonable diligence should have known, that it happened. Missing that deadline triggers a minimum civil penalty of $5,000, separate from any citations tied to the incident itself. The Cal/OSHA reporting requirements come from California Labor Code Section 6409.1 and Title 8 of the California Code of Regulations, and the hard part is usually not making the call but knowing which incidents require one and what to say when you do.

Which Incidents You Have to Report

The eight-hour report is only required for a “serious injury or illness” or a death. Title 8, Section 330(h) defines a serious injury or illness as one involving any of the following:¹

Inpatient hospitalization for treatment, not just observation or diagnostic testing. There is no minimum length of stay.
Amputation of any body part, including fingers and toes.
Loss of an eye.
Serious permanent disfigurement.

A separate category covers serious exposure to a hazardous substance. Cal/OSHA defines this as an exposure, from an incident or accumulated over time, that creates a realistic possibility of death or serious physical harm in the future. An employee who walks away feeling fine can still be the subject of a reportable event if the exposure carried that level of risk.²

The exclusions are narrower than many employers assume. Injuries from accidents on public streets or highways do not require a report unless the accident occurred in a construction zone. Injuries caused by criminal acts are no longer excluded; older guidance sometimes references a Penal Code carve-out, but it has been removed.²

When the Eight-Hour Clock Starts

The clock starts the moment the employer knows or, with diligent inquiry, would have known about the death or serious injury. Title 8 uses the word “immediately” and defines it as no longer than eight hours.³

That phrasing matters. If a night-shift foreman witnessed a serious injury and did not tell anyone until the next morning, the eight hours likely began when the foreman saw it, not when upper management heard. A clear internal chain of communication so that incidents reach whoever files the report is the single most practical safeguard against a late-reporting penalty.

An extension to 24 hours exists but is narrow. The employer has to show that exigent circumstances prevented timely reporting, such as a natural disaster that knocked out phone lines or an emergency that consumed all available personnel in rescue efforts. The burden sits with the employer.³

Delayed Deaths

Fatalities follow the same eight-hour window. When an employee is injured, hospitalized, and dies days or weeks later, Labor Code Section 6409.1 requires the employer to file an amended report within five days of learning of the death, assuming an initial injury report was already filed.⁴

How to File the Report

Cal/OSHA accepts reports by telephone and email. The agency directs employers to call the Cal/OSHA enforcement district office covering the worksite, which you can look up by zip code or city on the Department of Industrial Relations website.⁵ District office phone lines are available 24 hours a day, seven days a week.⁶

Section 6409.1 also authorizes reporting through an online mechanism once Cal/OSHA fully establishes it. Until then, phone or email is the route.⁴

Calling is still the safer route for meeting the eight-hour deadline because you get real-time confirmation. Ask for the representative’s name and a reference or confirmation number. That is your proof of compliance if the timing is later questioned.

Information to Have Ready

Section 342 lists what Cal/OSHA expects in the report. Try to have as much of this as possible before you call:

Date and time of the incident.
Employer’s name, address, and phone number.
Name and job title of the person making the report.
Address of the incident site.
Name of a contact person at the site.
Names and addresses of the affected employees.
Nature of the injuries.
Where the injured employees were taken for treatment.
Other law enforcement agencies present at the scene.
A description of the incident and whether the scene has been disturbed.

The regulation adds “if available,” so a missing data point does not excuse a late report. File what you know inside the eight hours and supplement afterward.³

Leave the Scene Alone

One of the questions on the report asks whether the accident scene has been altered. Cal/OSHA expects the scene of a serious incident to be left undisturbed until investigators can examine it. The only exception is action needed to protect employees or the public from an ongoing hazard, such as shutting off a ruptured gas line or clearing an unstable structure.

Practically, that means no cleanup, no moving equipment, and no repairs at the location before an inspector arrives or clears the site. Altering the scene, even unintentionally, invites extra scrutiny during the investigation and can undermine the employer’s defense if a citation follows.

Penalties for a Late or Missing Report

The civil penalty for missing the reporting deadline starts at $5,000 per violation. Both the Labor Code and Title 8 set that floor, and the actual amount can climb from there.⁴⁷

Repeat violations, willful failures to report, or active concealment can push the penalty substantially higher. Labor Code Section 6423 adds criminal exposure for certain workplace safety violations, with possible imprisonment of up to one year, individual fines up to $15,000, and corporate fines up to $150,000.⁸

The reporting penalty is separate from any citations for the underlying safety violations that caused the injury. A missed call does not replace an unsafe-condition citation; it stacks on top of it.

What Happens After the Call

Reporting a serious injury or fatality typically opens a Cal/OSHA investigation, which usually begins with an on-site inspection. A compliance officer arrives, presents credentials, and holds an opening conference to explain the scope of the inspection. The employer picks a representative to accompany the officer on the walkaround, and employees can designate their own representative to participate.

During the walkaround the officer looks for hazards, reviews injury and illness records, checks required safety postings, and may interview employees privately. Findings are discussed at a closing conference. Any violations are documented as formal citations rather than resolved on the spot.

If Cal/OSHA issues a citation, the employer has 15 working days from receipt to appeal to the Occupational Safety and Health Appeals Board. That deadline is firm. Requesting an informal conference with Cal/OSHA to discuss the citation does not pause or extend it.⁹

Reporting Is Not the Same as Recordkeeping

The immediate call to Cal/OSHA is one obligation. Ongoing injury and illness recordkeeping is another, and it covers a much wider range of incidents.

Employers must maintain a Cal/OSHA Form 300 log at each establishment, capturing work-related injuries and illnesses that result in death, days away from work, restricted work activity, job transfer, loss of consciousness, or medical treatment beyond first aid. Significant diagnosed conditions such as cancer, chronic irreversible diseases, fractured bones, and punctured eardrums also have to be recorded. Logs are kept for five years after the year they cover.¹⁰

A Form 300A summary of the prior year must be posted in a visible location at each workplace from February 1 through April 30, certified by a company executive, even if there were no recordable incidents. Establishments with 250 or more employees at any point during the prior year, and those with 20 to 249 employees in industries listed in the applicable appendix, must also electronically submit their 300A data by March 2. Establishments with fewer than 20 peak employees are exempt from electronic submission.¹⁰

The distinction matters because employers routinely blur the two. Recording means entering the incident on your internal Form 300 log. Reporting means calling Cal/OSHA within eight hours about a serious injury or death. A broken arm that keeps an employee home for two weeks belongs on the Form 300 log but may not require a call. An amputation requires both.

Who Reports on a Shared Worksite

Construction sites, warehouses staffed partly by contract labor, and other shared worksites raise a predictable question about who owes the report. When a temporary or contract employee is injured under the supervision of a host employer, the host employer generally records the injury on its own Form 300 log. For the eight-hour report, the employer directing the injured worker’s activities at the time of the incident should make the call. On a construction site with multiple subcontractors, the general contractor and the subcontractor whose employee was hurt often both end up involved.

When in doubt, report. A report that turns out not to have been required carries no penalty. A required report that never happens carries a $5,000 minimum.

1
Department of Industrial Relations. California Code of Regulations Title 8 Section 330 – Definitions
2
California Department of Industrial Relations. Cal/OSHA Changes to the Definitions of Serious Injury and Illness
3
Department of Industrial Relations. California Code of Regulations, Title 8, Section 342 – Reporting Work-Connected Fatalities and Serious Injuries
4
California Legislative Information. California Labor Code LAB 6409.1
5
California Department of Industrial Relations. Report a Work-Related Accident – Employers
6
Department of Industrial Relations. Cal/OSHA Enforcement Unit Regional and District Offices
7
Department of Industrial Relations. California Code of Regulations Title 8 Section 336 – Assessment of Civil Penalties
8
California Legislative Information. California Labor Code LAB 6423
9
California Department of Industrial Relations. Occupational Safety and Health Appeals Board – Overview of Appeal Process
10
California Department of Industrial Relations. Brief Guide to Recordkeeping Requirements