The California workers compensation act — formally the California California has no single statute formally titled the “Workers’ Compensation Act.” The law is codified as Labor Code Division 4, “Workers’ Compensation and Insurance.” Historically it was the Workmen’s Compensation, Insurance and Safety Act of 1913 (the Boynton Act)., found at California Labor Code Division 4 (Sections 3200 to 6208), with Division 4.5 for certain public employees. Constitutional authority is Cal.
Const. Article XIV, Section 4. — is the statute behind every workers’ comp claim, benefit and employer mandate in the state. This plain-English guide to the California workers compensation act gives the section numbers next to the rules people actually need: who must be covered, the deadlines, the waiting period, the pay rate, the exclusive-remedy bargain, the ban on retaliation and the penalties.
Verified against the official code as of October 2026.
California at a Glance
| Official name | California has no single statute formally titled the “Workers’ Compensation Act.” The law is codified as Labor Code Division 4, “Workers’ Compensation and Insurance.” Historically it was the Workmen’s Compensation, Insurance and Safety Act of 1913 (the Boynton Act). |
| Where it lives | California Labor Code Division 4 (Sections 3200 to 6208), with Division 4.5 for certain public employees. Constitutional authority is Cal. Const. Article XIV, Section 4. |
| First enacted | 1911 (Roseberry Act, which was elective). Coverage became compulsory under the Boynton Act of 1913, effective January 1, 1914. |
| Reporting deadline | 30 days after the injury to notify the employer (Labor Code §5400). Late notice may be excused under §5402/§5403. Confirm with DWC. |
| Filing deadline | 1 year, generally from the date of injury or the last benefit payment (Labor Code §5405). Death claims are covered by §5406. |
| Exclusive remedy | Labor Code §3600 and §3602(a) make workers’ comp the exclusive remedy against the employer. The main exceptions in §3602(b) are a willful physical assault by the employer, fraudulent concealment of the injury that makes it worse, and injury from a defective product the employer made and sold to others. Separately, §3706 lets a worker sue an employer that failed to carry coverage. |
| Recent amendments | AB 1870 (2024) amended Labor Code §3550, effective January 1, 2025. The employer’s workers’ comp notice must now state that an injured worker may consult a licensed attorney and that attorney’s fees are usually paid from the worker’s recovery. SB 1455 (2024) delayed SB 216’s requirement that every licensed contractor carry workers’ comp (Business and Professions Code §7125) to January 1, 2028. AB 1125 (Chapter 291, Statutes of 2025) amended Labor Code §3212.2, effective January 1, 2026, adding State Department of State Hospitals peace officers to the heart-trouble presumption. |
In This California Guide:
What the California Workers Compensation Act Is
A workers’ compensation act is a no-fault deal written into state law: the employer pays for work injuries without the worker proving fault, and the worker gives up most lawsuits against the employer in return. The California workers compensation act dates to 1911 (Roseberry Act, which was elective). Coverage became compulsory under the Boynton Act of 1913, effective January 1, 1914..
It lives at California Labor Code Division 4 (Sections 3200 to 6208), with Division 4.5 for certain public employees. Constitutional authority is Cal. Const. Article XIV, Section 4., and the official text is linked in the sources. Rebuttable presumptions that certain conditions are work-related for safety workers, including heart trouble (§3212.2), cancer (§3212.1) and PTSD (§3212.15). Utilization review (§4610) and Independent Medical Review (§4610.5) for medical-treatment disputes.
Medical Provider Networks (§4616). Permanent disability is apportioned by causation (§4663 and §4664). Life pension and permanent total disability rates are adjusted every year by the state average weekly wage (§4659(c)). Your state board and a licensed attorney can confirm how these apply to a specific claim.
Who the California Workers Compensation Act Covers
Labor Code §3700. Every employer except the state must secure coverage, by insurance or approved self-insurance, with a threshold of 1 or more employees. Employee status is defined in §3351, and §3357 presumes anyone rendering service is an employee.
Labor Code §3352 excludes listed workers, for example: household domestic workers who worked fewer than 52 hours or earned less than 100 in the 90 days before injury; certain volunteers; certain sole officers/directors; and some recreational-camp and sports workers.
Deadlines in the California Workers Compensation Act
Waiting period: Labor Code §4652. No temporary disability is paid for the first 3 days unless the disability lasts more than 14 days or the worker is hospitalized as an inpatient.. Wage-loss rate: Labor Code §4653 sets temporary total disability at two-thirds (66.67%) of average weekly earnings. Labor Code §4453(a)(10) sets the minimum and maximum earnings, which are indexed every year to the state average weekly wage..
California Workers Compensation Act: Key Sections at a Glance
The sections of the California workers compensation act that decide most cases, each with its citation:
| Coverage mandate | Labor Code §3700. Every employer except the state must secure coverage, by insurance or approved self-insurance, with a threshold of 1 or more employees. Employee status is defined in §3351, and §3357 presumes anyone rendering service is an employee. |
| Exemptions | Labor Code §3352 excludes listed workers, for example: household domestic workers who worked fewer than 52 hours or earned less than 100 in the 90 days before injury; certain volunteers; certain sole officers/directors; and some recreational-camp and sports workers. |
| Report an injury | 30 days after the injury to notify the employer (Labor Code §5400). Late notice may be excused under §5402/§5403. Confirm with DWC. |
| File a claim | 1 year, generally from the date of injury or the last benefit payment (Labor Code §5405). Death claims are covered by §5406. |
| Waiting period | Labor Code §4652. No temporary disability is paid for the first 3 days unless the disability lasts more than 14 days or the worker is hospitalized as an inpatient. |
| Wage-loss rate | Labor Code §4653 sets temporary total disability at two-thirds (66.67%) of average weekly earnings. Labor Code §4453(a)(10) sets the minimum and maximum earnings, which are indexed every year to the state average weekly wage. |
| Exclusive remedy | Labor Code §3600 and §3602(a) make workers’ comp the exclusive remedy against the employer. The main exceptions in §3602(b) are a willful physical assault by the employer, fraudulent concealment of the injury that makes it worse, and injury from a defective product the employer made and sold to others. Separately, §3706 lets a worker sue an employer that failed to carry coverage. |
| Retaliation | Labor Code §132a bars discrimination against a worker for filing or intending to file a claim. The remedy is compensation increased by one-half, capped at 10000, plus costs up to 250, reinstatement, and lost wages and work benefits. Violations are also a misdemeanor. |
| Uninsured employer penalty | Labor Code §3700.5 makes failing to secure coverage a misdemeanor (a fine of up to 10000 and/or up to 1 year in county jail). Labor Code §3710.1 and §3722 add a stop order and penalties: 1500 per employee; or, if uninsured for more than 1 week, the greater of twice the unpaid premium or 1500 per employee; plus 10000 per employee on compensable claims and 2000 per employee on non-compensable claims. |
| Who hears disputes | Labor Code §5300 and §5301 send disputed claims to the Workers’ Compensation Appeals Board (WCAB). Workers’ compensation administrative law judges hear cases at the district offices (§5309 to §5310). Reconsideration goes to the WCAB under §5900, and further review goes to the Court of Appeal under §5950. |
The Exclusive-Remedy Bargain in the California Workers Compensation Act
Labor Code §3600 and §3602(a) make workers’ comp the exclusive remedy against the employer. The main exceptions in §3602(b) are a willful physical assault by the employer, fraudulent concealment of the injury that makes it worse, and injury from a defective product the employer made and sold to others. Separately, §3706 lets a worker sue an employer that failed to carry coverage.
Retaliation and Penalties Under the California Workers Compensation Act
Labor Code §132a bars discrimination against a worker for filing or intending to file a claim. The remedy is compensation increased by one-half, capped at 10000, plus costs up to 250, reinstatement, and lost wages and work benefits. Violations are also a misdemeanor. Labor Code §3700.5 makes failing to secure coverage a misdemeanor (a fine of up to 10000 and/or up to 1 year in county jail).
Labor Code §3710.1 and §3722 add a stop order and penalties: 1500 per employee; or, if uninsured for more than 1 week, the greater of twice the unpaid premium or 1500 per employee; plus 10000 per employee on compensable claims and 2000 per employee on non-compensable claims. Labor Code §5300 and §5301 send disputed claims to the Workers’ Compensation Appeals Board (WCAB).
Workers’ compensation administrative law judges hear cases at the district offices (§5309 to §5310). Reconsideration goes to the WCAB under §5900, and further review goes to the Court of Appeal under §5950.
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Recent Amendments to the California Workers Compensation Act
AB 1870 (2024) amended Labor Code §3550, effective January 1, 2025. The employer’s workers’ comp notice must now state that an injured worker may consult a licensed attorney and that attorney’s fees are usually paid from the worker’s recovery. SB 1455 (2024) delayed SB 216’s requirement that every licensed contractor carry workers’ comp (Business and Professions Code §7125) to January 1, 2028.
AB 1125 (Chapter 291, Statutes of 2025) amended Labor Code §3212.2, effective January 1, 2026, adding State Department of State Hospitals peace officers to the heart-trouble presumption.
How to Read the California Workers Compensation Act
Statute pages are written for lawyers, so read the California workers compensation act in this order: the definitions section (who is an employee), the coverage section, then the specific section for your question, using the citations above. The official code is the source; the summaries on legal-information sites are not.
If a section of the California workers compensation act seems to conflict with what an insurer told you, the section wins — and the state agency’s information line can confirm it for free.
Applying the act: the California claim guide turns these sections into steps and dates, and the California requirements guide covers the employer side.
Frequently Asked Questions
Where is the California workers compensation act in the code?
California Labor Code Division 4 (Sections 3200 to 6208), with Division 4.5 for certain public employees. Constitutional authority is Cal. Const. Article XIV, Section 4.. The sources below link to the official text.
How long do I have to report a work injury under the California act?
30 days after the injury to notify the employer (Labor Code §5400). Late notice may be excused under §5402/§5403. Confirm with DWC.. Report in writing as soon as possible either way.
Can I sue my employer instead of using the California workers compensation act?
Usually not — the exclusive-remedy section bars most lawsuits against a covered employer. Claims against third parties, and against an uninsured employer, are the common exceptions.
Official California Sources & Resources
- California Division of Workers’ Compensation (DWC), within the California Department of Industrial Relations. Disputes are decided by the Workers’ Compensation Appeals Board (WCAB).: https://www.dir.ca.gov/dwc/
- California Workers’ Comp Statute: https://leginfo.legislature.ca.gov/faces/codes_displayexpandedbranch.xhtml?tocCode=LAB&division=4.&title=&part=&chapter=&article=
- U.S. Department of Labor — Workers’ Comp: dol.gov
- Insurance Information Institute: iii.org
This California workers compensation act guide was last verified against official California sources in October 2026. Rules change — confirm the current figure with the state agency or a licensed attorney.
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Disclaimer: This guide is informational only and is not legal, medical, or financial advice. Workers Comp Explained is an independent educational resource, not a law firm or insurer. Workers’ comp benefits, settlement values, deadlines, and requirements vary by state and by the specific facts of your injury and change over time, and any settlement figures here are illustrative only.
Confirm your rights and any deadline with your state’s workers’ compensation board and a licensed attorney before you act.