Workers Compensation Insurance Requirements in California

Federal law does not mandate workers' compensation insurance. The Occupational Safety and Health Act (OSHA), 29 U.S.C. § 651 et seq., requires employers to provide safe working conditions and comply with OSHA standards, but does not require workers' compensation coverage itself. Workers' compensation is a state-mandated program that replaces tort liability for workplace injuries.

Under the federal system, workers' compensation is exclusive: employees give up the right to sue their employer for negligence in exchange for guaranteed, no-fault benefits (medical treatment and wage replacement) regardless of fault. The Federal Employees' Compensation Act (FECA), 5 U.S.C. § 8101 et seq., provides workers' compensation coverage to federal employees.

Federal contractors and employers must comply with state workers' compensation laws where they operate. The federal government does not operate a unified national workers' compensation system; instead, each state maintains its own program with different rules, benefit levels, and insurance requirements. Employers operating in multiple states must comply with each state's specific workers' compensation insurance mandates.

California's workers' compensation system is mandatory and comprehensive, governed primarily by California Labor Code sections 3200–4435. Unlike federal law, which does not require workers' compensation insurance, California mandates coverage as a condition of doing business. California Labor Code section 3201 requires every employer to secure the payment of workers' compensation benefits to employees.

California's system is significantly stronger than the federal baseline because it eliminates tort liability entirely. Employees cannot sue employers for workplace injuries or occupational diseases covered by the law; instead, they receive guaranteed no-fault benefits. This trade-off protects employers from lawsuit exposure while ensuring employees receive expedited medical care and wage replacement without proving negligence.

Employers in California can meet the insurance requirement through three methods: (1) purchasing a policy from an insurer licensed by the California Department of Insurance, (2) self-insurance if approved by the Department of Industrial Relations (generally requiring $300,000+ liquid assets), or (3) membership in a joint powers authority (JPA). California law is stricter than many states because it does not allow most private employers to opt out.

California covers a broader class of workers than federal law. It includes independent contractors in certain circumstances (e.g., construction workers), undocumented immigrants, and workers in hazardous occupations. The law applies to all employers with any employees, regardless of size—there is no employee count threshold (unlike some federal protections). California Labor Code section 3700 imposes severe penalties for non-compliance: criminal penalties of up to one year in jail, fines up to $10,000 per day of violation, plus civil liability for any employee injury. The state's Division of Workers' Compensation actively enforces insurance requirements and investigates uninsured employers.

California's remedies for workers are also broader. Injured employees can receive up to two-thirds of average weekly wages during temporary disability, permanent disability benefits, vocational rehabilitation, medical treatment (without co-pays or deductibles on work-related injuries), and death benefits to dependents. These benefits are substantially higher than the federal baseline and are adjusted annually for inflation.

All employers with any employees must carry workers' compensation insurance—there is no employee count threshold in California.

Penalties for non-compliance: up to $10,000 per day of violation, plus up to one year in jail.

Self-insurance threshold: employers typically must demonstrate $300,000+ in liquid assets and Department of Industrial Relations approval.

Statute of limitations for employee injury claims: generally 1 year from injury for permanent disability claims, 5 years for maintenance of cumulative trauma conditions.

California law provides narrow exceptions to the mandatory insurance requirement. Sole proprietors with no employees are exempt. Partners in a partnership with no employees are exempt. However, if a sole proprietor or partner hires even one employee, insurance becomes mandatory.

Certain public employers are exempt because they self-insure through the state or maintain their own workers' compensation funds. The state of California, most counties, and many public agencies maintain state funds or self-insurance programs authorized by California Labor Code section 3050 et seq. These public entities do not purchase commercial insurance but provide equivalent coverage.

Employers can elect not to cover certain individuals in limited circumstances: unpaid volunteers in non-profit organizations; casual workers not regularly employed (though the definition is narrow and courts interpret this strictly); and in rare cases, workers employed exclusively for personal domestic service in a private home (though this exception is heavily restricted for wage and hour purposes).

Independent contractors are generally exempt from being covered as "employees," but California's ABC test under Dynamex Operations West, Inc. v. Superior Court (2018) makes independent contractor status difficult to establish. The test presumes workers are employees unless the employer proves: (A) the worker is free from control; (B) the worker performs work outside the usual course of the employer's business; and (C) the worker is customarily engaged in an independently established trade. Many purported independent contractors in California must actually be covered.

Uninsured employers may be liable directly to injured employees rather than through an insurer. If an employer fails to carry insurance, the employee can still claim workers' compensation benefits, but the employer (not an insurer) is responsible for paying them. Additionally, uninsured employers are not protected by the exclusive remedy rule and can be sued by injured employees for damages exceeding normal workers' compensation benefits, including punitive damages.

Step 1: Document the injury and insurance status. As an employee, immediately report your workplace injury to your supervisor or employer, no matter how minor. Request a copy of your employer's workers' compensation insurance certificate (Form WC 240 or similar). If your employer cannot produce proof of insurance, photograph or document that refusal. Keep a record of: (a) the date, time, and location of the injury; (b) witnesses present; (c) the mechanism of injury; (d) your symptoms and body parts affected; (e) any conversation with the employer about the injury; and (f) any delay in receiving medical treatment. Take photographs of the injury site and scene if possible.

Step 2: Report the injury internally and request workers' compensation. Provide written notice of the injury to your employer in person or by email (creates a timestamped record). Do not assume the employer will file for you. Ask for a copy of the workers' compensation claim form (DLSE Form 5021). Your employer must provide this form within one working day of learning of the injury. Complete your portion and submit it. If the employer does not provide the form or refuses to file your claim, contact the Division of Workers' Compensation directly.

Step 3: File with the California Division of Workers' Compensation (DWC). If your claim is denied, delayed, or your employer has no insurance, file a claim with the DWC at www.dir.ca.gov/dwc or call 1-844-922-8292. You will need: (a) employee information (name, address, Social Security number); (b) employer information and workers' compensation carrier name (if known); (c) description of injury and date; (d) description of work duties; (e) wage information; and (f) medical provider information if you have sought care. There is no filing deadline to claim workers' compensation benefits in California (unlike some states with strict deadlines), but delays in reporting can affect your claim. The DWC's Information and Assistance (I&A) program provides free help filing claims.

Step 4: Understand the investigation process. The DWC or employer's insurer will investigate your claim. This typically takes 14–30 days. You may be asked to provide a medical examination by a physician selected by the insurer (or, in disputed cases, a Qualified Medical Examiner selected jointly). The investigation determines: whether you are a covered employee, whether the injury is work-related, and your average weekly wage. Once approved, medical treatment begins immediately. The insurer or employer's self-insurance fund pays for all medically necessary treatment for the work injury.

Step 5: Consult an attorney if needed. If your claim is denied, your employer retaliates against you for filing, benefits are delayed beyond 30 days, or your injury is serious (requiring surgery or causing permanent disability), contact a workers' compensation attorney. The State Bar of California provides referrals at www.calbar.ca.gov. You do not need an attorney to file a claim, but an attorney is essential if the employer disputes liability or you believe benefits are inadequate. Under California law, attorneys' fees are capped at 15% of your award, so there is limited financial incentive for frivolous claims. Many workers' compensation attorneys work on contingency (no upfront cost).