When a large group of consumers, employees, or other parties asserts claims against a company or organization, mass arbitration can provide a structured path toward resolution. By coordinating the filing of many individual claims, mass arbitration can make it more practical for claimants to pursue disputes involving common issues. In this article, we’ll explore how mass arbitration works, the rules governing the process, and how costs are managed across large volumes of cases.
What is Mass Arbitration?
In mass arbitration, many individuals or other claimants file similar arbitration demands against the same entity, with the claimants represented by the same law firm or by firms working together. Arbitration is a form of alternative dispute resolution (ADR) in which a neutral arbitrator reviews the parties’ claims and evidence and issues a binding award. Arbitration typically arises from an arbitration agreement, such as one included in a consumer or employment contract. Mass arbitrations are typically administered by an established administering organization, such as the American Arbitration Association® (AAA®).
According to 2025 AAA data, consumer cases are generally the most common type of mass arbitration. Of consumer mass arbitration claims, gaming/entertainment and retail were the two industries with the highest number of claimants for cases filed in 2025.
Mass Arbitration vs Class Action Lawsuits
Mass arbitration claims and class action lawsuits share some similarities but are distinct legal processes. A class action lawsuit is filed in court by one or a few lead plaintiffs on behalf of a larger group who allegedly suffered similar harm. Class action lawsuits are typically filed against companies or organizations, but can sometimes be filed against government entities, individuals, or groups. If the court certifies the class, the resulting judgment or approved settlement generally applies to participating class members, subject to applicable opt-out rights and other limitations.
Mass arbitration often arises where an arbitration agreement requires disputes to proceed in arbitration on an individual basis and may also contain a waiver of class or collective proceedings. In mass arbitration, rather than proceeding as one representative case, numerous claimants file separate arbitration demands involving similar allegations. Each person’s case is evaluated and decided individually, and award outcomes may differ from case to case.
Mass Arbitration Rules
Mass arbitrations are governed by applicable federal and state law, the arbitration agreement between the parties, and the administering organization’s relevant rules. At the AAA, the Mass Arbitration Supplementary Rules establish procedures for coordinating and administering a large volume of related individual cases. The applicable practice area rules, such as the Consumer, Employment/Workplace, Commercial, or Construction Arbitration Rules, then govern the administration of and procedures for the individual arbitrations.
The AAA maintains separate mass arbitration fee schedules and resources for consumer mass arbitration, employment/workplace mass arbitration, and other applicable practice areas. Visit the AAA Mass Arbitration Services page for a general overview of mass arbitration rules and procedures.
How Mass Arbitration Works
How Do Parties Initiate Mass Arbitration?
For consumer and employment/workplace mass arbitration, individual claimants may initiate coordinated filings through counsel. In other practice areas, such as B2B or construction, businesses or other parties may initiate a mass arbitration by filing coordinated demands through legal counsel, depending on the underlying disputes and the scope of the applicable arbitration agreement. To initiate a mass arbitration with the AAA, the filing party must satisfy the filing requirements under the applicable arbitration rules as well as the additional requirements set out in the AAA’s Mass Arbitration Supplementary Rules.
At the AAA, consumer or employment/workplace cases qualify as mass arbitration if 25 or more similar arbitration demands with coordinated representation are filed against the same party or related parties. For other applicable practice areas, a case qualifies as mass arbitration if 100 or more similar arbitration demands with coordinated representation are filed against the same party or related parties.
Administrative Review & Case Organization
Early in the administration of a mass arbitration, the AAA may appoint a process arbitrator to address procedural and other non-merits issues that arise across the cases. Because mass arbitration involves many individual claims, this distinct role helps to oversee filing compliance, address procedural issues affecting groups of claims, and handle fee disputes. The process arbitrator serves a separate function from the merits arbitrator(s), who issue a binding award for each case. The AAA case management team also provides administrative support to the process arbitrator, helping coordinate the efficient administration of a large volume of cases.
How Individual Cases Move Forward
As the mass arbitration progresses, merits arbitrators are appointed to the individual cases. Depending on the number of individual claimants and the administering organization’s procedures or rules, multiple merits arbitrators may be required to decide all the cases efficiently.
At the AAA, individual cases proceed under the arbitration rules of the applicable practice area and the Mass Arbitration Supplementary Rules. Each case is heard and decided on its own merits. When necessary, individual cases may involve a formal hearing in which the parties present evidence and the merits arbitrator hears each side of the dispute. Mass arbitration hearings are often conducted virtually but may be held in person. In some cases, the merits arbitrator may decide the dispute based on written submissions and evidence without holding a hearing.
For each case that proceeds to decision, the merits arbitrator generally issues a final and binding award. In practice, many individual cases are settled before an award is issued. For AAA consumer mass arbitration merits cases that were closed in 2025, 72% were settled before award.
How Are Costs Managed in Mass Arbitration?
Typically, for consumer and employment/workplace mass arbitration cases, AAA administrative fees are capped for individual consumers or employees. These costs are limited to allow arbitration to remain accessible to individual claimants. In certain cases, individual claimants may pay no fees at all. According to 2025 AAA data, consumers paid zero fees in 17% of closed merits cases. For employment cases, employees paid zero fees in 35% of closed merits cases.
Due to the large volume of cases, administrative fees and arbitrator compensation can lead to substantial costs for the company or organization defending against a consumer or employment mass arbitration. For all types of mass arbitration, the AAA has established fee schedules and procedures designed to manage costs as the cases progress. This structure allows the parties to incur applicable fees and arbitrator compensation as cases advance.
Why the Arbitration Administrator Matters
The organization administering mass arbitration claims plays a central role in managing how the proceedings move forward. An established administrator can provide a neutral and accessible framework, with rules and procedures designed to support fair and orderly proceedings. At the AAA, streamlined rules and procedures help manage large-scale filings, while process arbitrators and case managers address procedural, administrative, and organizational needs. As a not-for-profit, public-service organization, the AAA has rules in place to manage costs and provide a fair and efficient process for navigating complex mass arbitration proceedings.
Whether a mass arbitration case involves dozens or thousands of claimants, the AAA is well-prepared to manage the entire process from filing to resolution. The AAA also offers access to arbitrators with extensive industry-specific knowledge and experience, including arbitrators who specialize in consumer cases, employment/workplace cases, and other applicable practice areas. Learn more about AAA mass arbitration filing procedures, our expert neutrals, and applicable rules by practice area: