How to Prove Retaliation in the Workplace in California
To prove retaliation in California, you must show three things: you engaged in protected activity, your employer took an adverse employment action, and there is a causal link between the two. Once you establish those elements, California law shifts the burden to the employer to justify the action — and SB 497 now creates a rebuttable presumption of retaliation when adverse action follows protected activity within 90 days.
Element One: Protected Activity
The first element of any California retaliation claim is that the employee engaged in activity the law protects. Under FEHA (Gov. Code § 12940(h)) and the California Labor Code, protected activity includes a wide range of conduct:
- Reporting harassment, discrimination, or a hostile work environment to a supervisor, HR, or a government agency
- Filing a wage claim or complaint with the California Labor Commissioner
- Reporting a safety violation to Cal/OSHA or a supervisor
- Filing a workers' compensation claim
- Requesting medical leave under CFRA or FMLA
- Opposing conduct you reasonably believe violates the law — even if the conduct turns out not to be unlawful
- Cooperating with an internal investigation or government inquiry
- Disclosing information to a government agency as a whistleblower under Lab. Code § 1102.5
The activity need not succeed to be protected. An employee who reports harassment that is ultimately not substantiated, or files a wage claim that is later denied, still engaged in protected activity if they did so with a reasonable, good-faith belief that the conduct was unlawful.
Element Two: Adverse Employment Action
Retaliation requires a materially adverse employment action — something that would deter a reasonable employee from engaging in protected activity. Termination is the most obvious form, but it is far from the only one.
Forms of adverse action courts recognize under California law
Termination or constructive termination; demotion or reduction in title, duties, or pay; reduction in hours or undesirable schedule changes; denial of a promotion or raise the employee was otherwise eligible for; negative performance reviews unsupported by prior concerns; exclusion from meetings, projects, or communications; transfer to a less desirable role or location; and creation or intensification of a hostile work environment following a complaint.
Element Three: Causal Link
The third element — causation — is often the most contested. The employee must show that the protected activity was a contributing factor in the employer's decision to take the adverse action. Under Lawson v. PPG Architectural Finishes, Inc. (2022) 12 Cal.5th 703, the California Supreme Court confirmed that Lab. Code § 1102.6 governs whistleblower retaliation claims: the employee need only show the protected activity was a contributing factor , not a but-for cause or even a substantial motivating reason.
Circumstantial evidence of causation includes:
- Temporal proximity: the adverse action occurred shortly after the protected activity
- Shifting justifications: the employer's stated reason for the action changed over time
- Inconsistent treatment: the employer treated the employee differently after the protected activity compared to similarly situated employees who did not engage in it
- Departure from established procedures: the employer skipped its own progressive discipline steps
- Suspicious timing of performance documentation: negative reviews or write-ups appeared for the first time after the complaint
SB 497: The 90-Day Rebuttable Presumption
When the burden shifts to the employer automatically
SB 497 amended Lab. Code §§ 98.6, 1102.5, and 1197.5 to add a rebuttable presumption of retaliation: if an employer takes an adverse action against an employee within 90 days of the employee engaging in protected activity under any of those sections, it is presumed that the adverse action was retaliatory. The burden shifts to the employer to demonstrate a legitimate, non-retaliatory reason.
SB 497 also added civil penalties of up to $10,000 per violation, payable directly to the employee — on top of all other available remedies including lost wages, emotional distress damages, and attorney's fees under FEHA.
Note: The 90-day presumption applies to Lab. Code §§ 98.6, 1102.5, and 1197.5 specifically — not to FEHA § 12940(h) retaliation claims, which are governed by the contributing-factor standard confirmed in Lawson v. PPG.
Pretext: When the Employer's Reason Does Not Hold Up
Once the employee establishes the three elements, California law requires the employer to articulate a legitimate, non-retaliatory reason for the adverse action. The employee then has the opportunity to show that reason is pretextual — that it did not actually motivate the decision, or that it would not have motivated the same decision absent the protected activity.
Evidence of pretext includes:
- The stated reason appeared for the first time after the protected activity, with no prior documentation
- The employer applied the policy inconsistently — enforcing it against the complaining employee but not against others in similar circumstances
- The employer's decisionmakers were aware of the protected activity before taking the adverse action
- The employer's explanation changed between the time of the action and subsequent litigation
- The adverse action was disproportionate to the stated infraction
Building Your Evidence File
What to preserve from day one
A retaliation claim is built on evidence, and the most valuable evidence is created contemporaneously. From the moment you engage in protected activity — and certainly if you suspect retaliation may follow — begin building a documented record:
Written record of protected activity: Note the date, time, and substance of any complaint, report, or request you made, and to whom. If you reported verbally, follow up in writing — an email to HR summarizing what you said in a meeting creates a time-stamped record.
Evidence of the adverse action: Retain copies of any disciplinary notices, performance reviews, emails about schedule changes, or communications relating to a demotion or termination.
Comparator evidence: Identify colleagues in similar roles who did not engage in protected activity and were treated differently — retained in positions you were removed from, not subjected to the same discipline, or given opportunities you were denied.
Timeline documentation: Build a chronology mapping the dates of your protected activity against the dates of each adverse action. Under SB 497, a 90-day window is legally significant.
Frequently Asked Questions
You must show: (1) you engaged in protected activity; (2) your employer took an adverse employment action against you; and (3) there is a causal link between the two. Under Lab. Code § 1102.6 as interpreted by Lawson v. PPG Architectural Finishes (2022) 12 Cal.5th 703, the protected activity need only be a contributing factor — not the sole or primary reason — for the adverse action. SB 497 creates a rebuttable presumption of retaliation when adverse action follows protected activity within 90 days for claims under Lab. Code §§ 98.6, 1102.5, and 1197.5.
Protected activity includes reporting harassment, discrimination, or safety violations; filing a wage claim; requesting medical leave; filing a workers' compensation claim; opposing conduct you reasonably believe violates the law; and cooperating with an investigation. The activity need not succeed or be ultimately substantiated — a reasonable, good-faith belief that the conduct was unlawful is sufficient.
No. Retaliation includes any materially adverse employment action — not just termination. Demotion, reduction in pay, undesirable schedule changes, transfer, exclusion from projects, negative performance reviews with no prior history of concerns, and intensification of a hostile work environment following a complaint can all constitute actionable retaliation.
Very important. Temporal proximity between the protected activity and the adverse action is one of the most powerful forms of circumstantial evidence. Under SB 497 (effective January 1, 2024), an adverse action taken within 90 days of protected activity under Lab. Code §§ 98.6, 1102.5, or 1197.5 creates a rebuttable presumption of retaliation — shifting the burden to the employer to disprove it.
For FEHA retaliation claims, you must file a complaint with the California Civil Rights Department within three years of the retaliatory act, then file suit within one year of receiving a right-to-sue notice. For Lab. Code § 1102.5 whistleblower claims, the limitations period is generally three years. Deadlines may run simultaneously — consult an employment attorney promptly to preserve all available claims.
If you believe you have been retaliated against for engaging in protected activity, McLellan Law Group, LLP can evaluate your claim. We represent employees throughout Saratoga, San Jose, Campbell, Santa Clara, Sunnyvale, Cupertino, and the greater Silicon Valley area. Request a complimentary initial consultation at mclellanlawgroup.lawbrokr.com or call (408) 963-7533.
About the Authors
Claire Melehani, Esq.
Employment law attorney at McLellan Law Group with extensive experience representing employees in wrongful termination, discrimination, and retaliation matters throughout Silicon Valley.
Steven McLellan, Esq.
Founding attorney at McLellan Law Group, specializing in employment law and business litigation throughout Silicon Valley and Santa Clara County.
Advertising Material Disclaimer: This article is an advertisement for legal services by McLellan Law Group, LLP. The information provided is for general informational purposes only and does not constitute legal advice. Reading this article does not create an attorney-client relationship. Prior results do not guarantee a similar outcome. Responsible Attorney: Claire Melehani, Esq., 20665 4th Street, Suite 202, Saratoga, CA 95070.
