Landmark Cases Every California Employee Should Know
The rights described throughout this series did not appear fully formed in a statute. Many of them were established, clarified, or expanded by the California Supreme Court in decisions that changed what it means to be an employee in this state. These are the cases that matter most — and what each one means for you.
Statutes create rights. Courts define them. The California Supreme Court, through a series of landmark employment decisions spanning four decades, has shaped the rights that California workers exercise every day — often without knowing where those rights came from or how close they came to not existing at all.
What follows are the cases that matter most. Each one established or clarified a principle that affects how employment cases are evaluated, litigated, and resolved. Together, they form the judicial foundation of California employment law.
Tameny v. Atlantic Richfield Co. (1980)
What it established: The tort of wrongful termination in violation of public policy.
An employee was fired for refusing to participate in a price-fixing scheme. The Supreme Court held that an employer may not discharge an at-will employee for a reason that violates fundamental public policy — in this case, for refusing to commit a crime.
Why it matters: Before Tameny, at-will employment meant what it said: an employer could fire an employee for any reason. Tameny carved the most important exception: an employer cannot fire someone for refusing to break the law, for performing a legal duty, for exercising a legal right, or for reporting a violation. The decision created a tort claim with full compensatory and punitive damages — the most powerful remedial framework in employment law.
Armendariz v. Foundation Health Psychcare Services (2000)
What it established: Minimum requirements for employment arbitration agreements.
An employer required employees to sign an arbitration agreement that was one-sided and restrictive. The Supreme Court held that employment arbitration agreements covering statutory claims must satisfy five minimum requirements: a neutral arbitrator, all statutory remedies available, adequate discovery, a written decision, and employer-paid arbitration costs.
Why it matters: Armendariz prevents employers from using arbitration to suppress claims. An arbitration agreement that limits damages, restricts discovery, or requires the employee to share costs is unconscionable and unenforceable. The decision ensures that arbitration is an alternative forum, not a mechanism for denying justice.
Brinker Restaurant Corp. v. Superior Court (2012)
What it established: The employer’s obligation to provide meal periods, not to ensure they are taken.
A class of restaurant workers alleged that the employer failed to provide legally compliant meal periods. The Supreme Court held that the employer must make the meal period available and must not impede or discourage the employee from taking it — but need not police the employee’s use of the time.
Why it matters: Brinker defined the boundary of the employer’s meal break obligation. The employer must provide the break — must relieve the employee of all duty for thirty minutes — but is not liable if the employee voluntarily chooses not to take it. The decision applies to every meal and rest break case in California and is the starting point for evaluating whether the employer’s practices are compliant.
Dynamex Operations West v. Superior Court (2018)
What it established: The ABC test for determining whether a worker is an employee or an independent contractor.
A delivery company classified its drivers as independent contractors. The Supreme Court adopted the ABC test: a worker is presumed to be an employee unless the hiring entity proves (A) the worker is free from control, (B) the work is outside the company’s usual course of business, and (C) the worker has an independent business. All three prongs must be met.
Why it matters: Dynamex made it dramatically harder for employers to classify workers as independent contractors. The decision shifted the presumption to employee status and placed the burden on the employer to prove otherwise. It was later codified by the Legislature in AB 5 and affects millions of California workers in the gig economy, construction, trucking, and other industries.
Yanowitz v. L’Oreal USA, Inc. (2005)
What it established: A broad definition of “adverse employment action” in retaliation cases.
A manager was instructed to fire a sales associate because the associate was not “hot enough.” The manager refused. The employer subjected the manager to a campaign of escalating negative treatment — excessive scrutiny, unwarranted criticism, demeaning conduct. The Supreme Court held that retaliation need not take the form of a single dramatic act; a pattern of conduct that is “reasonably likely to deter employees from engaging in protected activity” constitutes an adverse action.
Why it matters: Yanowitz expanded what counts as retaliation beyond termination and demotion to include the cumulative effect of individually minor adverse actions — the “death by a thousand cuts” that employers use to punish employees without an identifiable triggering event. The decision protects employees who experience subtle, incremental retaliation.
Iskanian v. CLS Transportation Los Angeles, LLC (2014)
What it established: PAGA claims cannot be waived through pre-dispute arbitration agreements.
An employer’s arbitration agreement included a waiver of the employee’s right to bring representative claims, including PAGA claims. The Supreme Court held that the PAGA waiver was unenforceable — because PAGA claims are brought on behalf of the state, not the individual, and the state’s enforcement right cannot be waived by a private agreement.
Why it matters: Iskanian preserved PAGA as an enforcement tool even in the face of mandatory arbitration. Without this decision, employers could have eliminated representative wage claims entirely through arbitration agreements. The decision ensures that employees retain the ability to enforce the Labor Code on behalf of the state, regardless of what they signed. The rule has since been refined rather than erased: under Viking River (2022) and Adolph v. Uber (2023), the employee’s individual PAGA claim may be compelled to arbitration, but the representative action survives — and arbitrating the individual claim does not strip standing to pursue it.
Adolph v. Uber Technologies, Inc. (2023)
What it established: An employee who is compelled to arbitrate their individual PAGA claim retains standing to pursue the representative PAGA claim in court.
Following the U.S. Supreme Court’s Viking River Cruises decision, which held that individual PAGA claims could be compelled to arbitration, the question became whether the employee lost standing to pursue the representative claim in court. The California Supreme Court held they did not.
Why it matters: Adolph closed the gap that Viking River threatened to open. It ensures that PAGA’s representative enforcement mechanism survives even when the individual claim is sent to arbitration. The decision preserved PAGA’s vitality as the primary private enforcement tool for the Labor Code.
Cotran v. Rollins Hudig Hall International (1998)
What it established: The standard for evaluating whether an employer’s good-faith belief in misconduct justifies a termination.
An employer terminated an employee based on an internal investigation that found the employee had committed sexual harassment. The employee denied it. The Supreme Court held that the question is not whether the employee actually committed the misconduct but whether the employer conducted a fair investigation and honestly believed the employee was guilty.
Why it matters: Cotran established the “honest belief” defense — and its limits. The decision protects employers who act on good-faith findings from fair investigations. But it also establishes that the investigation must be fair: an investigation that is biased, incomplete, or predetermined does not support the defense. The quality of the investigation is always subject to scrutiny.
Why these cases matter to you
These decisions are not academic. They are the foundation of the rights you exercise — or fail to exercise — in every employment dispute. Tameny is why you can refuse to break the law without losing your job. Armendariz is why your arbitration agreement may not be as enforceable as your employer thinks. Dynamex is why your classification as an independent contractor may be wrong. Yanowitz is why the subtle retaliation you are experiencing is actionable, even if no single incident seems dramatic.
The cases are the law. Understanding them is understanding your rights — not as abstractions, but as principles that real courts applied to real disputes to produce real consequences.
The rights described throughout this series rest on a judicial foundation built by the California Supreme Court over four decades. Each case addressed a specific injustice. Each one expanded what the law protects. Together, they define what it means to be an employee in California — and why California’s protections are the strongest in the country.
This article is general information about California law and is not legal advice. Every situation turns on its particular facts.