What is the difference between a class action and a mass tort?
A class action consolidates many similar claims into a single lawsuit with one or a few representative plaintiffs and one class-wide resolution binding on everyone included, while a mass tort keeps each plaintiff's claim legally distinct even when the cases are coordinated together for efficiency, such as through consolidated pretrial proceedings. Mass tort plaintiffs generally still need individualized proof of their own harm and typically receive individually negotiated or litigated outcomes, unlike the single collective resolution in a class action.
How a Class Action Resolves Claims
In a class action, a single case proceeds on behalf of an entire defined class, and a court certifies who exactly is included based on shared characteristics of the claim.
One judgment or settlement ultimately binds every member of the certified class, and individualized proof of each person's specific harm is generally not required at the class-wide stage of the case.
How a Mass Tort Keeps Claims Separate
In a mass tort, each plaintiff typically files their own individual claim, and those claims are often consolidated for pretrial purposes, such as shared discovery and coordinated bellwether trials that help gauge how similar cases might play out.
Even though the cases are handled together for efficiency, each plaintiff's claim remains legally distinct, meaning individual proof of causation and harm is still required for each person's case.
Why the Distinction Affects Outcomes
A class action outcome applies collectively to the entire class, generally through a shared settlement fund or a single judgment that covers everyone included.
A mass tort's outcomes, by contrast, can vary significantly from plaintiff to plaintiff, since each individual's specific facts, degree of harm, and evidence are evaluated and resolved largely on their own.
When Each Approach Is Typically Used
Class actions tend to fit situations involving relatively uniform harm, such as a shared contract term or a standardized practice affecting a large group of people in essentially the same way.
Mass torts are more common where the underlying harm and causation vary significantly from person to person, such as in some product liability and personal injury contexts, making claims unsuitable for the kind of common, class-wide treatment a class action requires.
- Do I get an individual payout in a class action the way I might in a mass tort?
- In a class action, payouts typically come from a shared settlement fund distributed according to a common allocation plan, while in a mass tort, individual plaintiffs more often negotiate or litigate their own damages based on their specific circumstances.
- Can a case start as a mass tort and become a class action, or vice versa?
- The two are different procedural vehicles, and whether a group of claims can proceed as a class action depends on whether they meet class certification requirements. Some mass tort claims are found unsuitable for class treatment precisely because individual facts vary too much.
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