Tyson Foods, Inc. v. Bouaphakeo
The Supreme Court ruled that a class of Tyson Foods meatpacking workers could use a statistical time-and-motion study to prove their overtime claims as a group, even though not every worker donned and doffed protective gear for exactly the same amount of time.
The Court declined to adopt any broad rule about statistical evidence in class actions, holding only that this kind of representative sample is allowed when each worker could have used the same study to prove an individual claim on his or her own.
How it got here: A federal district court certified the class and collective action and a jury awarded damages; the Eighth Circuit affirmed, and Tyson asked the Supreme Court to review the certification.
The Case in Depth
What happened
Workers at a Tyson Foods pork plant in Iowa had to wear protective gear before certain tasks, but Tyson didn't pay for all the time spent putting on and taking off that gear, and kept no records of it. The workers sued for unpaid overtime under federal and Iowa wage law, relying on an expert's study estimating average donning-and-doffing time to fill the evidentiary gap left by Tyson's missing records.
The question before the Court
When a company doesn't track workers' time, can employees use an expert's average time-study to prove the whole group's overtime claims as a class?
The Court's answer
Yes — the Court ruled that the workers could rely on the expert's averaged time study to prove their claims as a group. The key test is whether each worker could have used that same study to prove hours worked if he or she had sued individually; if so, using it classwide doesn't give the class any special advantage it wouldn't otherwise have.
Because Tyson kept no records of donning-and-doffing time, every worker would have needed to rely on the same study in a solo lawsuit, so allowing it in the class case was proper. The Court refused to lay down any broader rule about statistical evidence in all class actions, saying that question depends on the specific claim and evidence involved.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Workers in industries where employers fail to keep accurate time records gain a clearer path to group lawsuits: they can rely on expert sampling instead of person-by-person proof. Employers face continued exposure to class and collective actions over unpaid overtime, though the decision leaves open how to keep uninjured class members from sharing in a damages award.
What changes now
The case goes back to the district court, which must figure out how to distribute the $2.9 million award. Tyson can raise its argument that some class members weren't actually injured and shouldn't receive money once a distribution plan is proposed. The Chief Justice's concurrence expressed doubt that the district court will be able to separate injured from uninjured workers given how the jury reached its verdict.
What this does not decide
The Court did not decide whether a class can be certified, or a damages award can stand, when it includes members who were not actually injured. It also declined to set any general rule for using statistical or representative evidence in class actions beyond this specific FLSA record-keeping context.
Concurrences and dissents
Concurrence — Justice Roberts
Chief Justice Roberts joined the majority in full but wrote separately to stress that the study only worked because it met the ordinary standard of proof, not some relaxed FLSA-specific rule. He expressed serious doubt that the district court will actually be able to figure out which class members were truly injured, since the jury's lump-sum verdict gives no way to know how much donning-and-doffing time it credited in each department.
Dissent — Justice Thomas
Justice Thomas argued the district court never properly analyzed whether the variation in workers' donning-and-doffing times was too individualized for classwide proof, and that the expert study actually confirmed wide variation rather than uniformity. He contended the majority misread Mt. Clemens to create an unwarranted special evidentiary rule for FLSA cases and would have reversed the certification.
How the Court got there
The legal reasoning, step by step
- The Court applied Rule 23(b)(3)'s predominance requirement, which asks whether legal or factual questions shared by the whole class outweigh questions that would need individual proof for each person.
- Drawing on Anderson v. Mt. Clemens Pottery Co., a 1946 case addressing employers who fail to keep required work-time records, the Court explained that when a company's record-keeping failure creates an evidentiary gap, workers may fill that gap with a reasonable estimate rather than precise individual proof.
- The Court set out a test for when a statistical sample is a fair substitute for individual proof in a class case: the sample is permissible if each class member could have used it to prove his or her own claim in a standalone lawsuit.
- Applying that test, the Court found that because Tyson kept no donning-and-doffing records, every worker would have had to rely on the same expert study even suing alone, so using it classwide gave the class no unfair advantage.
- The Court distinguished Wal-Mart Stores, Inc. v. Dukes, where individual Wal-Mart employees could not have used a small sample of anecdotes to prove discrimination by their own particular manager, because those workers were not similarly situated the way the Tyson plant workers were.
- The Court declined to reach Tyson's separate argument that some class members were uninjured, ruling that question was not yet ripe because the damages award had not been distributed and the record didn't show how distribution would work.
Doctrinal impact
Cases affected by this decision
Reaffirms Anderson v. Mt. Clemens Pottery Co. (328 U. S. 680)
The Court relies on this 1946 case as still-good law allowing reasonable-inference proof when employers fail to keep time records.
Distinguishes Wal-Mart Stores, Inc. v. Dukes (564 U. S. 338)
The Court says Wal-Mart doesn't bar representative evidence here because those employees, unlike Tyson's, weren't similarly situated.