The Employer’s Duty to Prevent: California’s Most Underused Cause of Action
FEHA does not merely prohibit harassment and discrimination. It requires employers to take all reasonable steps to prevent them. When an employer fails to train, fails to investigate, or fails to act — and harassment or discrimination results — the failure to prevent is itself an independent violation, with its own remedies.
Most employees who have been harassed or discriminated against think of their case in terms of the conduct itself — what the harasser said, what the employer did, how the discrimination affected their career. These are the primary claims, and they are the ones that receive the most attention.
But California law provides an additional cause of action that is often overlooked, frequently underlitigated, and sometimes more powerful than the primary claim it accompanies. Government Code section 12940, subdivision (k), makes it independently unlawful for an employer to “fail to take all reasonable steps necessary to prevent discrimination and harassment from occurring.”
This is not a restatement of the employer’s liability for harassment. It is a separate obligation — a duty to prevent — and its violation is a standalone claim with its own elements and its own remedies.
What the statute requires
Section 12940(k) imposes an affirmative obligation. The employer must take “all reasonable steps necessary” to prevent discrimination and harassment. This is not a passive requirement. The employer cannot simply refrain from discriminating and consider its obligations met. It must actively implement measures designed to prevent unlawful conduct from occurring in the first place.
What constitutes “all reasonable steps” depends on the circumstances, but courts and the FEHA regulations have identified specific categories of action the employer is expected to take.
Written policies. The employer must maintain a written anti-harassment and anti-discrimination policy that identifies the prohibited conduct, describes the complaint procedure, identifies the persons to whom complaints can be directed, and promises prompt investigation and corrective action. The policy must be distributed to all employees.
Training. Employers with five or more employees must provide interactive harassment prevention training to all employees every two years — at least two hours for supervisors and one hour for non-supervisory employees. Government Code section 12950.1. The training must cover the definition of harassment, the employer’s complaint process, remedies available to victims, and the supervisor’s obligation to report and address harassment.
Complaint procedures. The employer must establish accessible, confidential channels for reporting harassment and discrimination. The procedures must be clearly communicated and must provide multiple avenues for reporting — so that an employee whose harasser is also the person to whom complaints are directed has an alternative.
Investigation and corrective action. When the employer becomes aware of potentially harassing or discriminatory conduct — through a complaint, through observation, or through any other means — it must conduct a prompt, thorough, and impartial investigation. If the investigation confirms the conduct, the employer must take corrective action reasonably calculated to end the harassment and prevent its recurrence.
Monitoring and follow-up. After corrective action is taken, the employer should follow up to ensure the conduct has stopped and that the complainant has not been subjected to retaliation.
Why it matters as a standalone claim
The failure-to-prevent claim serves several functions that the primary harassment or discrimination claim does not.
It survives weaknesses in the primary claim. A harassment claim requires the employee to prove that the conduct was severe or pervasive. A discrimination claim requires evidence of discriminatory motive. The failure-to-prevent claim asks a different question: did the employer take reasonable steps to prevent the conduct? An employer that had no policy, provided no training, ignored prior complaints, and failed to investigate has violated section 12940(k) — regardless of whether the underlying harassment or discrimination claim has vulnerabilities.
In practice, this means the failure-to-prevent claim can provide a safety net. If the jury finds that the harassment was not quite severe or pervasive enough to meet the primary standard — a close call — it can still find that the employer failed to prevent it. The employer’s systemic failures are independently actionable.
It shifts the focus to the employer’s conduct. The primary harassment claim focuses on what the harasser did. The failure-to-prevent claim focuses on what the employer did — or did not do — to stop it. This shift is strategically valuable because the employer’s institutional failures are often more compelling to a jury than the individual harasser’s conduct. A jury that is uncertain about whether a particular comment crossed the line may have no uncertainty about whether the employer’s failure to train, investigate, or act was reasonable.
It reaches systemic failures. An employer that has a pattern of inadequate investigation — that dismisses complaints, conducts perfunctory inquiries, or protects high-ranking harassers — has violated section 12940(k) in a way that affects every employee who was subjected to harassment that the employer failed to prevent. The claim can address institutional culture, not just individual behavior.
How the claim is proved
A failure-to-prevent claim requires the employee to show: (1) that harassment or discrimination occurred; (2) that the employer failed to take all reasonable steps to prevent it; and (3) that the failure was a substantial factor in causing the harm.
The first element — that harassment or discrimination occurred — means the failure-to-prevent claim exists as a companion to a primary claim. It cannot be brought in isolation, without any underlying harassment or discrimination. But the underlying claim need not succeed completely — the existence of the conduct, even if it does not meet every element of the primary claim, can support the companion claim.
The second element — the employer’s failure — is established through evidence of what the employer did and did not do. Did it have a policy? Was the policy distributed? Did it provide training? Was the training adequate? Did it investigate complaints? Were the investigations thorough and impartial? Did it take corrective action? Was the action effective? Each of these questions addresses a specific component of the duty to prevent.
The third element — causation — asks whether the employer’s failures contributed to the harm. If the employer had trained its supervisors, would the supervisor have known to stop the conduct? If the employer had investigated the first complaint, would the harassment have ended before it escalated? The causal connection between the employer’s failure and the employee’s harm is what makes the claim meaningful.
What makes this claim powerful
The failure-to-prevent claim is powerful because it holds employers accountable not just for what happened but for what they should have done to stop it from happening. It shifts the inquiry from the individual incident to the institutional environment — from “was this comment severe enough?” to “did this employer take its obligations seriously?”
For employees, the claim provides additional leverage — another theory of liability, another set of facts the employer must defend, another basis for damages. For the system, it incentivizes prevention. An employer that knows it will be held liable for failing to prevent harassment — independent of liability for the harassment itself — has a stronger incentive to invest in policies, training, and responsive complaint procedures.
The claim is underused. Many plaintiff’s attorneys plead it as a routine companion to the primary claim without developing it independently. When it is developed — when the evidence of the employer’s systemic failures is presented with the same care as the evidence of the underlying conduct — it can be among the most effective claims in the case.
If your employer failed to train its supervisors, failed to investigate your complaint, failed to take corrective action, or failed to maintain the basic infrastructure that California law requires for preventing harassment and discrimination — that failure is itself a violation. The duty to prevent is not aspirational. It is enforceable.
This article is general information about California law and is not legal advice. Every situation turns on its particular facts.