Certification & Sampling

One claim, or a class of them

The misclassification analysis to this point has been about a single manager: the duties, the salary, the working-manager problem. Certification asks whether that analysis can be run once, for an entire population of managers, or must be run manager by manager. The stakes of the answer are enormous. A single assistant manager's overtime claim is a bounded matter; a certified class of every assistant manager who held the same role under the same classification is the aggregated exposure the category overview describes — the back overtime, premiums, wage-statement penalties, and waiting-time penalties, multiplied across the class and metered through PAGA. Certification is therefore the event that converts the per-employee exposure into the matter that commands serious settlement attention, and contesting it is among the highest-value defense activities in the case.

California decides certification under Code of Civil Procedure section 382, which the courts read to require an ascertainable class and a well-defined community of interest — predominant common questions of law or fact, class representatives whose claims are typical, and representatives who can adequately represent the class. The contested element in misclassification cases is almost always the first: whether common questions predominate over the individualized questions the exemption inquiry seems to invite. The two cases that govern the answer are Sav-On, on whether the misclassification question is common, and Duran, on how a certified class may be proved.

The blanket classification is itself a common question

Sav-On Drug Stores v. Superior Court is the foundational California authority, and it cuts against the employer. The plaintiffs were several hundred to over a thousand current and former assistant and operating managers who alleged they had been misclassified as exempt because they spent more than half their time on nonexempt work. The trial court certified the class; the Court of Appeal ordered decertification on the ground that individual issues predominated; and the California Supreme Court reversed, holding that the trial court had not abused its discretion in certifying. The Court reasoned that common questions could predominate where the employer had applied a uniform exempt classification to a standardized role — that whether such a classification policy existed, and whether it was put into practice under standardized operating conditions, are themselves common questions, and that a court could conclude misclassification was "the rule rather than the exception" provable on a classwide basis.

The decision rejected the employer's central objection — that its right to litigate the exemption defense as to each individual manager necessarily made the case unsuitable for class treatment. The Court held that the existence of individualized damage questions, and even some individual variation, does not by itself defeat predominance if the liability theory is amenable to common proof. The uncomfortable lesson for employers is that the blanket classification which is administratively efficient — designating every assistant manager exempt, without an individualized duties assessment — is precisely the practice that supplies the common question supporting certification. The very uniformity that simplifies payroll is the uniformity a plaintiff invokes to certify.

The blanket exempt classification is convenient to administer and dangerous to defend: the uniformity that simplifies payroll is the common question that certifies the class.

Where the defense to certification lives

Sav-On does not make every misclassification class certifiable; it makes certification turn on a distinction the defense has to work — between the classification policy and the classification practice. The policy is common almost by definition: the employer classified the role as exempt across the board. But misclassification liability does not turn on the policy alone; it turns on whether the managers were in fact primarily engaged in nonexempt work, which is a question about practice — what each manager actually did. Where the practice was itself uniform, because standardized operations and a centralized labor model made line work a consistent feature of the role, the practice is common too, and certification follows. Where the practice genuinely varied — some managers spent most of the day on exempt work and others did not, depending on store, volume, staffing, and individual approach — the question of misclassification becomes individualized, and the defense can argue that those numerous and substantial individual questions predominate over the common classification policy.

This is the analytic seam the defense must open. It is not enough to point to the abstract possibility of individual variation, which Sav-On holds does not defeat predominance; the defense has to show, with evidence, that the variation is real and material — that establishing liability would in fact require a separate, fact-intensive inquiry into each manager because there is no common pattern of practice. That evidentiary showing is what distinguishes a certifiable case from an uncertifiable one, and it is why the same documentary record that supports the merits defense on the duties — duty logs, time studies, location-level staffing data — does double work at certification, where it demonstrates that practice was heterogeneous and the case cannot fairly be tried in one trial.

A certified class still has to be tried within due process

Certification is not the end of the defense, because even a certified misclassification class must be tried, and Duran v. U.S. Bank fixes the constitutional limit on how. A class of hundreds of managers cannot realistically be proved one by one, so plaintiffs turn to representative testimony and statistical sampling — establishing the exempt/nonexempt split for a sample and extrapolating to the class. Duran holds that this method has a hard boundary: representative or statistical proof may not be used in a manner that deprives the employer of the opportunity to litigate its affirmative defenses, and the trial plan and the sample must be rigorous enough to preserve that opportunity. In Duran itself, the trial court had extrapolated classwide liability and damages from a small, flawed sample while refusing to let the employer present evidence that some class members were properly classified; the Supreme Court reversed, holding the plan violated due process.

For the defense, Duran converts the post-certification fight into a contest over the soundness of the plaintiff's representative method — the same kind of contest the manageability analysis describes in the PAGA setting. The arguments are directed at the sample's size and selection, its representativeness, the margin of error, and, above all, whether the plan leaves the employer a genuine opportunity to prove that particular managers were correctly classified. A misclassification class that cannot be tried without burying the exemption defense in an extrapolation is a class whose trial plan fails Duran — which can force a narrower plan, a smaller class, or a recognition that the claim is not provable representatively. Certification and the trial plan are thus two successive defenses, and a class that survives the first can still founder on the second.

When common questions predominate — and when they do not

Predominance turns on the facts of the role and the proof proposed. Select a pattern to see how it bears on certification and the trial plan, and on what authority:

Fig. 1. Predominance across recurring patterns. Sav-On (2004) 34 Cal.4th 319; Duran (2014) 59 Cal.4th 1; Code Civ. Proc. § 382. Certification is reviewed for abuse of discretion and is intensely fact-specific; these are tendencies, not outcomes, and the trial plan must independently satisfy Duran even where common questions predominate.

Two successive defenses, and a structural tension to manage

The defense posture follows from the two cases. First, contest certification on the policy-versus-practice line — marshal evidence that the managers' actual time allocation varied materially, so that misclassification cannot be established without individualized inquiry and individual questions predominate. Second, if the class is certified, attack the trial plan under Duran — challenge any sampling that would foreclose the exemption defense, and insist on a plan rigorous enough to preserve the employer's right to prove that particular managers were correctly classified. The two are sequential, and a loss on the first does not end the case; a class certified over the defense's objection can still be defeated, narrowed, or made unprovable at the trial-plan stage.

Underlying both is a structural tension the employer should manage before any claim arises. The blanket exempt classification that supports certification is a choice, not a necessity. An employer that classifies managers individually — assessing each role against the duties and the salary, documenting the basis, and reclassifying where the test is not met — both reduces the misclassification on the merits and disrupts the common-policy theory that makes certification straightforward under Sav-On. The same individualized rigor that protects the exemption protects against the class. The strongest position is therefore upstream of litigation entirely: a classification practice that is genuinely individualized, documented, and current, which is the subject the salary-basis and duties analyses develop and which the exposure analysis presupposes when it asks what reclassification will cost.

Contest predominance on practice, then hold the trial plan to Duran