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What Is California Labor Code §3700 (Employer Comp-Insurance Mandate)?
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By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization · Cal Bar #285231
Every employer except the state shall secure the payment of compensation in one or more of the following ways: (a) By being insured against liability to pay compensation by one or more insurers duly authorized to write compensation insurance in this state. (b) By securing from the Director of Industrial Relations a certificate of consent to self-insure either as an individual employer, or as one employer in a group of employers, which may be issued upon furnishing proof satisfactory to the director of ability to self-insure and to pay any compensation that may become due to his or her employees.
What does California Labor Code §3700 actually require?
Section 3700 requires every California employer to secure workers' comp insurance through an admitted carrier or qualify as a certified self-insured employer.
Section 3700 is California's workers' compensation insurance mandate, every employer must secure coverage through an admitted carrier or qualify as a certified self-insured employer, and failure to comply brings civil liability, criminal penalties, and a stop-work order. The mandate protects every worker. Certified Specialist Eman Yazdchi (California Board of Legal Specialization, State Bar of California) enforces section 3700 coverage obligations on every file where the employer's insurance status is in question.
California Labor Code §3700 requires every California employer to secure the payment of workers' compensation benefits through one of two routes: insurance against liability by an insurer admitted to transact comp business in California, or by securing a Certificate of Consent to Self-Insure from the Director of Industrial Relations. The §3700 California rule is the statutory foundation of the entire workers' compensation coverage system, without §3700 compliance, the no-fault bargain under California Labor Code §3600, California's no-fault liability anchor, cannot function.
Which California employers must actually comply with §3700?
Every California employer with at least one employee, even a part-time domestic worker, must comply with section 3700 or face criminal and civil penalties.
Under California Labor Code §3700, virtually every California employer with at least one employee, regardless of full-time, part-time, or temporary status, must secure comp coverage. The §3700 mandate reaches construction, agriculture, retail, restaurant, manufacturing, healthcare, professional services. Worker classification under California Labor Code §2775 (the ABC test) determines who counts as an employee; once classified, California Labor Code §3351 confirms coverage regardless of immigration status, and §3700 requires the employer to insure.
What are the two §3700 California compliance routes?
The two compliance routes are commercial insurance through a licensed California carrier and certification as a qualified self-insured employer by the Department of Industrial Relations.
Under California Labor Code §3700, a California employer satisfies the comp insurance mandate by one of two routes. Route one is purchasing a comp policy from an insurer admitted to transact comp business in California. Route two is qualifying as a self-insured employer through the Department of Industrial Relations Office of Self-Insurance Plans, which requires posting security, financial-strength demonstration, and ongoing reporting. The §3700 California requirement is non-delegable.
What are the consequences when a California employer violates §3700?
When a California employer violates section 3700, the consequences include a stop-work order, a misdemeanor prosecution, and civil liability under section 3706 for any injury during the uninsured period.
When a California employer violates California Labor Code §3700, three layers of consequence apply at once. Under California Labor Code §3700.5, the failure is a misdemeanor punishable by county jail and fines plus civil penalties of $10,000 per employee on the date of the offense. Under California Labor Code §3706, the injured worker may sue the employer in civil court outside the California Labor Code §3601 exclusive-remedy bar. The Uninsured Employers Benefits Trust Fund also pays the worker's benefits and seeks reimbursement from the uninsured employer.
How does §3700 interact with the Uninsured Employers Benefits Trust Fund?
Section 3700 interacts with the Uninsured Employers Benefit Trust Fund, the backstop that pays workers' comp benefits when the employer carried no insurance as required.
Under California Labor Code §3700 and the UEBTF framework, when a California employer fails to carry comp insurance and a worker is injured, the Uninsured Employers Benefits Trust Fund administered by the Division of Workers' Compensation pays the worker's benefits, California Labor Code §4600 medical, California Labor Code §4653 TD, California Labor Code §4660 PD, and then pursues reimbursement from the uninsured employer. The §3700 violation does not leave the California worker uncompensated; it shifts the financial burden onto the uninsured employer.
DWC's 2024 Audit Report logged 12,463 cases reviewed by Audit Unit auditors, with a defendant-paid penalty rate above the historical baseline, a reminder that the §5814 25% self-imposed late-payment increase is enforced, not theoretical.
Related reading: California pillar guide · §2775 explainer.
Related on yazdchilaw.com: California workers' compensation lawyer pillar · California Labor Code §5400.30 explained · California Labor Code §3700.6 explained · what to do if you can't go back to work after a workers' comp injury.
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What does California Labor Code §3700 actually require an employer to do?
California Labor Code §3700 requires every California employer to secure the payment of workers' compensation benefits through one of two routes: insurance against liability by an admitted California comp insurer, or a Certificate of Consent to Self-Insure issued by the Director of Industrial Relations. The §3700 California rule is the statutory foundation of the entire workers' compensation coverage system, without §3700 compliance the no-fault bargain under California Labor Code §3600 cannot function and the employer is exposed under California Labor Code §3700.5 and California Labor Code §3706.
Which California employers must actually carry workers' comp under §3700?
Under California Labor Code §3700, virtually every California employer with at least one employee, regardless of full-time, part-time, or temporary status, must secure workers' compensation coverage. The §3700 California mandate reaches construction, agriculture, retail, restaurant, manufacturing, healthcare, professional services, and gig-economy hirers. Worker classification under California Labor Code §2775 determines who counts as an employee; once classified as employees, California Labor Code §3351 confirms coverage regardless of immigration status, and §3700 requires the employer to insure for that workforce.
What happens when a California employer violates §3700?
When a California employer violates California Labor Code §3700, three layers of consequence apply simultaneously. Under California Labor Code §3700.5, the failure is a misdemeanor punishable by county jail and fines plus civil penalties of $10,000 per employee on the date of the offense (or $2,000 per employee with a higher cap when no injury occurred). Under California Labor Code §3706, the injured California worker may sue the employer in civil court outside the California Labor Code §3601 exclusive-remedy bar. The Uninsured Employers Benefits Trust Fund also pays the worker's benefits and seeks reimbursement.
What are the two §3700 California compliance routes for an employer?
Under California Labor Code §3700, a California employer satisfies the workers' comp insurance mandate by one of two routes. Route one is purchasing a workers' compensation policy from an insurer admitted to transact comp business in California, the California Insurance Commissioner maintains the admitted-carriers list. Route two is qualifying as a self-insured employer through the Department of Industrial Relations Office of Self-Insurance Plans, which requires posting security, financial-strength demonstration, and ongoing reporting. The §3700 California requirement is non-delegable to subcontractors or staffing agencies.
What happens to the injured worker when a California employer is uninsured under §3700?
When a California employer fails to carry workers' compensation insurance as California Labor Code §3700 requires, the injured worker is NOT left uncompensated. The Uninsured Employers Benefits Trust Fund administered by the Division of Workers' Compensation pays the worker's benefits, California Labor Code §4600 medical, California Labor Code §4653 TD, California Labor Code §4660 PD, and then pursues reimbursement from the uninsured California employer. The worker may also separately sue the employer in civil court under California Labor Code §3706 outside the California Labor Code §3601 exclusive-remedy bar, with the added benefit of a Section 3708 presumption of employer negligence.
Last reviewed by Eman Yazdchi, Esq., June 2026.
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