Labor Code § 1102.6
The standard of proof for whistleblower retaliation claims
Section 1102.6 supplies the exclusive, plaintiff-friendly proof framework for whistleblower claims — the contributing-factor and clear-and-convincing structure the Supreme Court confirmed in Lawson displaces McDonnell Douglas.
Read the official text at California Legislative Information →
Overview
Labor Code section 1102.6 supplies the standard of proof for whistleblower-retaliation claims brought under Labor Code section 1102.5. Enacted in 2003 as part of the Legislature’s broad strengthening of whistleblower protection, it replaced the borrowed federal burden-shifting analysis with a structure deliberately weighted toward employees who can show their protected activity mattered.
The provision is short but consequential. It establishes a two-step allocation of proof: a contributing-factor showing by the employee, then a heightened same-decision defense the employer must carry by clear and convincing evidence. For years, defendants resisted applying it, urging courts to graft the familiar three-stage McDonnell Douglas test onto section 1102.5 claims. The California Supreme Court put that debate to rest in Lawson v. PPG Architectural Finishes.
The two-step framework
By a preponderance of the evidence, the employee must show that retaliation for protected whistleblowing activity was a contributing factor in the adverse employment action. This is a lower bar than but-for causation: the protected activity need only have contributed to the decision, not have been its sole or decisive cause.
The burden then shifts to the employer to prove, by clear and convincing evidence, that it would have taken the same action for legitimate, independent reasons even if the employee had not engaged in any protected activity. This is the statute’s “same-decision” defense, and the heightened evidentiary standard is what makes it demanding.
Why it matters: the displacement of McDonnell Douglas
In Lawson, the Supreme Court held that section 1102.6 — not McDonnell Douglas — provides the framework for litigating and reviewing a section 1102.5 claim. The distinction is outcome-determinative at summary judgment. Under McDonnell Douglas, an employer that articulates a legitimate reason can often shift the case back to the plaintiff to prove pretext. Under section 1102.6, by contrast, even a plaintiff who cannot disprove the employer’s stated reason may prevail if retaliation was a contributing factor, unless the employer carries its clear-and-convincing same-decision burden.
The practical upshot is that section 1102.6 makes summary judgment harder for defendants and gives whistleblower plaintiffs a materially better path to trial than they would have under the federal model. (See Lawson v. PPG Architectural Finishes.)
Practice notes
Frame every section 1102.5 case under section 1102.6 from the pleadings forward, and resist any defense effort to import McDonnell Douglas pretext analysis. Develop evidence of contribution — temporal proximity, shifting explanations, comparator treatment — to satisfy step one. Where the employer raises the same-decision defense, hold it to the clear-and-convincing standard; that defense reduces or bars remedies only if actually proven, and it rarely resolves the case as a matter of law.
Open questions
Courts continue to work out how the section 1102.6 same-decision defense interacts with the SB 497 (2023) presumption of retaliation, and how the contributing-factor standard applies in mixed-motive and multi-decisionmaker settings. Confirm the latest decisional law before relying on any specific formulation.
Related on this site
Practitioner analysis, current as of June 2026 — not the statute itself. Statutes are amended and decisional law evolves; confirm the operative language and current authority at the official source before relying.
See also: Lampkin v. County of Los Angeles