What changed in Rule 702 in December 2023?

Two things: (1) the amendment makes explicit that the proponent must establish admissibility by a preponderance of the evidence — sufficiency of basis and reliability are threshold admissibility questions for the court, not jury questions of weight; (2) the expert's opinion must reflect a reliable application of the principles and methods to the facts of the case.

Did the 2023 amendment change the substance of Rule 702 or just clarify it?

The Advisory Committee framed it as correcting widespread misapplication — many courts had treated reliability challenges as going to weight rather than admissibility. Whether styled as change or clarification, the practical effect is more active judicial gatekeeping and more granular scrutiny of how methods were applied.

How should litigators adapt expert selection to amended Rule 702?

Vet methodology, not just credentials; pressure-test your own expert's reliable application before the other side does; research the opposing expert's exclusion history; and learn the assigned judge's Daubert tendencies from the public record before briefing.

Rule 702 hub · Updated July 2026

The 2023 Rule 702 Amendment, Explained for Litigators

By SwornIn · Informational only — not legal advice.

On December 1, 2023, Federal Rule of Evidence 702 received its most consequential amendment in nearly a quarter century. If your practice touches expert testimony — and almost every serious case does — the amendment reset the ground rules for how experts are selected, challenged, and defended. Here is what changed, why, and what to do about it.

What the amended rule says

Two revisions matter. First, the rule now states explicitly that expert testimony is admissible only if the proponent demonstrates "to the court that it is more likely than not" that the reliability requirements are met — codifying the preponderance standard for admissibility. Second, subsection (d) now requires that the expert's opinion "reflects a reliable application of the principles and methods to the facts of the case."

Why the committee acted

The Advisory Committee's notes are unusually blunt: many courts had been misapplying the rule. Two habits drew fire:

"Goes to weight, not admissibility." Courts routinely waved reliability problems past the gate on the theory that cross-examination would sort them out. The amendment makes clear that sufficiency of basis and reliability of application are threshold questions for the judge — before a jury ever hears the opinion.
The "liberal admissibility" gloss. Language from older cases had calcified into a presumption of admission. The amendment restores active gatekeeping as the default posture.

What it means in practice

The context that gives the amendment teeth: exclusion was already common. Roughly a third of challenged experts are at least partially excluded, and 46% of Daubert challenges against financial experts have succeeded across 1,500+ published opinions. A higher, more explicit standard raises those stakes further — full data in our 2026 report.

Vet methodology, not résumés. A distinguished CV will not carry an opinion whose method was unreliably applied. Ask for the analysis plan before disclosure, not after the motion.
Pressure-test your own expert first. Run the challenge the other side will run — data sufficiency, method fit, application to these facts.
Research the opposing expert early. Exclusion history, prior qualification fights, and methodological criticism are all in the public record.
Know your judge. Gatekeeping intensity varies dramatically judge to judge. Prior Daubert rulings are discoverable — run the free judge lookup before you brief.
Paper the reliability story from engagement day one. The expert's file should read like an exhibit to your opposition brief.

State-court ripple effects

Most states pattern their evidence rules on the federal model, and several have begun tracking the amendment's language or citing it persuasively. Meanwhile, in the 28 states with affidavit-of-merit requirements, the expert-quality question now arrives twice: at filing, and again at the reliability gate.

Built for the Rule 702 era

SwornIn scores every expert's reliability (ERI), flags Daubert risk, and reveals judge tendencies — so you choose experts who survive the gate. Founding firms get 2 months free.

Find a Rule 702-ready expert → Check your judge