Class action waivers are generally enforceable in California, but the state recognizes more ways to defeat one than almost anywhere else in the country. Federal law and California’s own arbitration statute both start from a presumption of enforcement. The exceptions, though, are real and frequently decisive: unconscionable terms, claims under the Private Attorneys General Act, requests for public injunctive relief, and an employer’s failure to pay arbitration fees on time can all rescue a case from individual arbitration.
The Default Rule Is Enforcement
The Federal Arbitration Act tells courts to treat arbitration agreements, including the class action waivers embedded in them, as “valid, irrevocable, and enforceable, save upon such grounds as exist at law or in equity for the revocation of any contract.”1Office of the Law Revision Counsel. 9 USC 2 – Validity, Irrevocability, and Enforcement of Agreements to Arbitrate California’s Arbitration Act uses nearly identical language in Code of Civil Procedure section 1281.2California Legislative Information. California Code of Civil Procedure 1281
Two U.S. Supreme Court decisions locked this in. AT&T Mobility v. Concepcion (2011) struck down a California rule that had treated most consumer class action waivers as unconscionable, holding the FAA preempted it. Epic Systems Corp. v. Lewis (2018) extended the same reasoning to employment, allowing employers to require individual arbitration of workplace disputes.3Supreme Court of the United States. Epic Systems Corp v Lewis So the starting point is simple. If you signed an arbitration agreement with a class waiver, expect a court to enforce it unless a specific defense applies.
The rest of this article is about those defenses.
Unconscionable Terms Can Void the Agreement
Unconscionability is the most common ground for challenging a waiver in California. It has two components, and courts want to see some of both before refusing to enforce an agreement.
Procedural unconscionability looks at how the contract was formed. A take-it-or-leave-it presentation, hidden terms, and unequal bargaining power all count. Most employment and consumer arbitration agreements have at least some procedural unconscionability because they are contracts of adhesion.
Substantive unconscionability looks at the terms themselves. Clauses that cap the weaker party’s remedies, impose lopsided costs, gut discovery, or send only the employee’s claims to arbitration while leaving the employer free to sue in court are typical red flags.
California uses a sliding scale. The more procedural unfairness in how the agreement was signed, the less substantive unfairness a challenger needs to show, and vice versa.4California Law Review. Sliding Scales of Justice – An Analysis of Californias Approach to Unconscionability Ambiguities are read against the party that drafted the contract, which in nearly every consumer or employment case is the company.
Extra Requirements for Employment Arbitration
When a mandatory arbitration agreement covers statutory employment claims, like discrimination or wage violations, California layers on the Armendariz requirements. To be enforceable, the agreement must provide:
- A neutral arbitrator
- Adequate discovery for the employee to prove the claim
- A written award
- All types of relief that would be available in court
- No unreasonable costs or arbitrator fees imposed on the employee
An agreement that fails any of these can be struck down in whole or have its offending provisions severed.5Justia Law. Armendariz v Foundation Health Psychcare Services Inc The two most common Armendariz failures are discovery limits so tight that the employee cannot realistically build a case, and cost-shifting language that puts arbitrator fees on the worker.
PAGA Claims Behave Differently
The Private Attorneys General Act lets an employee sue an employer for civil penalties for Labor Code violations on behalf of the state and other affected workers.6Department of Industrial Relations. Private Attorneys General Act (PAGA) – Filing Because the claim technically belongs to the state, it does not sit comfortably inside the class action framework, and that mismatch has driven a decade of litigation.
The California Supreme Court held in Iskanian v. CLS Transportation (2014) that workers cannot be forced to waive representative PAGA claims as a condition of employment.7FindLaw. Iskanian v CLS Transportation Los Angeles LLC The U.S. Supreme Court partially undid that in Viking River Cruises v. Moriana (2022), ruling that the FAA lets employers compel the employee’s own individual PAGA claim into arbitration.8Oyez. Viking River Cruises Inc v Moriana
Then the California Supreme Court answered in Adolph v. Uber Technologies (2023). Even when an employee’s individual PAGA claim is sent to arbitration, the employee keeps standing to pursue the representative PAGA claims in court on behalf of other workers. An order compelling individual arbitration “does not strip the plaintiff of standing to proceed as an aggrieved employee to litigate claims on behalf of other employees under PAGA.”9Justia Law. Adolph v Uber Technologies Inc The waiver cannot block the group action, only route the individual piece to arbitration.
The 2024 PAGA reforms (SB 92 and AB 2288) changed the rules for actions filed on or after June 19, 2024. To qualify as an “aggrieved employee,” a worker must have personally suffered each alleged violation, not just one of them.10California Legislative Information. California Labor Code 2699 Employers also got new cure options: businesses with fewer than 100 employees can propose a confidential cure plan within 33 days of the PAGA notice, and larger employers can request an early evaluation conference and a court-ordered stay.11California Legislative Information. Senate Bill 92 The Adolph standing rule still holds, but plaintiffs have a narrower path in.
Public Injunctive Relief Cannot Be Waived
McGill v. Citibank (2017) added another California-specific limit. An arbitration provision cannot waive the right to seek public injunctive relief in any forum. Public injunctive relief means a court order aimed primarily at stopping unlawful conduct that threatens future harm to the general public, not just compensating the individual plaintiff.12Justia Law. McGill v Citibank NA
The court grounded the rule in Civil Code section 3513: “a law established for a public reason cannot be contravened by a private agreement.”13California Legislative Information. California Civil Code 3513 Because the rule applies to all contracts and does not single out arbitration, the court held the FAA does not preempt it. In October 2025, the U.S. Supreme Court declined to review Coinbase Inc. v. Kramer, which had raised the preemption question, leaving McGill in place. If your claims include a request for public injunctive relief under California consumer protection law, that portion cannot be forced into individual arbitration no matter what the agreement says.
If the Employer Doesn’t Pay, You Can Leave
A less obvious way out: the company has to pay for the arbitration it insisted on. Under Code of Civil Procedure section 1281.98, in employment and consumer arbitrations, the party that drafted the agreement must pay all required fees within 30 days of the invoice due date. A late payment is a material breach, and the employee or consumer can withdraw from arbitration and take the case to court.14California Legislative Information. California Code of Civil Procedure 1281.98 The statute of limitations is tolled back to when the claim was first filed, so the delay does not cost the worker time. The worker can also petition to compel payment or advance the fees and recover them later.
The California Supreme Court refined this rule in Hohenshelt v. Superior Court (2025). Not every late payment triggers automatic forfeiture. Loss of arbitration rights follows when the nonpayment is willful, fraudulent, or grossly negligent. Good-faith mistakes generally do not cost the employer its arbitration clause. Strategic or repeated late payment still does.
When a Waiver Won’t Hold Up
Putting it together, a class action waiver signed in California is likely enforceable for ordinary contract disputes and most individual statutory claims. The realistic exits are:
- The agreement is unconscionable, most often because it caps remedies, restricts discovery, or shifts arbitrator costs onto the employee or consumer.
- An employment agreement fails one of the five Armendariz requirements.
- The claim is a PAGA claim. The individual portion may go to arbitration, but representative claims on behalf of other workers can proceed in court.
- The claim seeks public injunctive relief under California consumer protection law. Under McGill, that request cannot be waived or forced into individual arbitration.
- The company willfully or grossly negligently misses the 30-day arbitration fee deadline, letting the employee or consumer walk out of arbitration and into court.
Whether any given waiver will actually hold up depends on how the agreement is drafted, which claims are involved, and whether the company follows through on its own arbitration obligations. If you are looking at a waiver in a specific dispute, those three questions are where an attorney will start.