Rule 9(b) particularity: how to win a motion to dismiss fraud claims

Federal Rule of Civil Procedure 9(b) imposes a heightened pleading standard for fraud and mistake. The rule is short, but its consequences are large: a plaintiff who pleads fraud in the bare-bones notice style of Rule 8 is dismissed, often before any discovery. For defendants, that makes 9(b) one of the most efficient ways to end a fraud case at the front door.

This guide walks through what particularity actually requires, how 9(b) interacts with the Twombly and Iqbal plausibility standard, the special rules for securities-fraud claims under the PSLRA, and the brief-writing moves that make a particularity attack land. It also covers the traps that sink otherwise meritorious motions, including the relaxed standard for fraud-by-omission cases and the group-pleading problem.

What Rule 9(b) actually requires

Rule 9(b) states: "In alleging fraud or mistake, a party must state with particularity the circumstances constituting fraud or mistake. Malice, intent, knowledge, and other conditions of a person's mind may be alleged generally."

The clause is deceptively simple. Federal courts have spent decades elaborating what "particularity" means in practice. The widely accepted formulation requires the plaintiff to plead the who, what, when, where, and how of the alleged fraud. See Vess v. Ciba-Geigy Corp. USA, 317 F.3d 1097, 1106 (9th Cir. 2003) ("Averments of fraud must be accompanied by 'the who, what, when, where, and how' of the misconduct charged.").

In practice that means the complaint must identify:

Who made the alleged misrepresentation or omission. A named defendant, not a corporate placeholder.
What the misrepresentation was. The actual words spoken, written, or omitted, or a close paraphrase.
When it was made. A date or, at minimum, a date range narrow enough to give the defendant notice.
Where it was made. The forum, document, communication, or transaction.
How the statement was false or misleading. The plaintiff must explain why the statement was untrue when made, not just that it later turned out to be wrong.

Conditions of mind, including knowledge of falsity and intent to defraud, may be alleged generally. That generality is narrower than it looks: post-Iqbal, conclusory allegations of "knowing" or "intentional" conduct will not survive even under Rule 9(b)'s relaxed scienter clause if there are no factual allegations from which scienter can be inferred.

How Rule 9(b) interacts with Twombly and Iqbal

Rule 9(b) operates on top of, not instead of, the plausibility standard from Bell Atlantic Corp. v. Twombly, 550 U.S. 544 (2007), and Ashcroft v. Iqbal, 556 U.S. 662 (2009). Both standards must be satisfied. A complaint that pleads with particularity but fails plausibility goes out under 12(b)(6). A complaint that is plausible but vague on the particulars of the fraud goes out under 9(b).

The interaction matters most for the scienter element. Rule 9(b) says state of mind may be alleged generally. Iqbal says conclusory allegations are not entitled to the assumption of truth. The dominant reading is that a plaintiff need not plead specific facts proving knowledge or intent, but must plead facts from which a reasonable inference of scienter can be drawn. See Iqbal, 556 U.S. at 686-87. A bare allegation that "Defendant knew the statement was false" is not enough. An allegation that the defendant received internal reports showing the opposite of what was publicly stated is enough.

For defense briefs, this means the particularity attack and the plausibility attack should be framed together. Show that the complaint lacks the who-what-when-where-how detail Rule 9(b) requires, and separately show that the remaining allegations of scienter and reliance are conclusory under Iqbal.

The PSLRA layer for securities fraud

Securities-fraud claims under § 10(b) of the Exchange Act and Rule 10b-5 face a second pleading standard, codified by the Private Securities Litigation Reform Act of 1995 (PSLRA). The PSLRA requires the complaint to:

Specify each statement alleged to be misleading and the reasons it is misleading.
State with particularity facts giving rise to a "strong inference" of scienter.

The Supreme Court interpreted the "strong inference" requirement in Tellabs, Inc. v. Makor Issues & Rights, Ltd., 551 U.S. 308 (2007). The inference of scienter must be "more than merely plausible or reasonable, it must be cogent and at least as compelling as any opposing inference of nonfraudulent intent." Id. at 314. Courts evaluate the complaint holistically, considering plausible nonculpable explanations alongside the plaintiff's culpable inference and asking whether a reasonable person would deem the inference of scienter at least as strong as any innocent alternative. Id. at 324.

That standard is harder for plaintiffs than ordinary Rule 9(b) particularity. Defense briefs in securities cases should always lead with Tellabs: walk the court through the innocent inferences supported by the same facts the plaintiff cites, and explain why the inference of fraud is not "at least as compelling."

The leading circuit cases

Vess v. Ciba-Geigy Corp. USA, 317 F.3d 1097 (9th Cir. 2003), is the most-cited articulation of the 9(b) particularity requirement outside the securities context. The Ninth Circuit held that 9(b) applies not only to claims labeled as fraud but to any claim that "sounds in fraud" or relies on a "unified course of fraudulent conduct." Id. at 1103-04. That sweep matters because plaintiffs often plead consumer-protection, false-advertising, RICO, and unfair-competition claims that depend factually on fraudulent conduct. Vess says those claims, even though they are not labeled fraud, must meet 9(b).

The Vess court also clarified what to do when a complaint contains both fraud-based and non-fraud-based allegations: the fraud-based portions must be pleaded with particularity, and a failure to meet 9(b) means those portions (not necessarily the entire claim) are stricken. Id. at 1104-05.

Other widely cited authorities for the contours of 9(b) include DiLeo v. Ernst & Young, 901 F.2d 624, 627 (7th Cir. 1990) (the "first paragraph of any newspaper story" formulation of particularity), and United States ex rel. Clausen v. Lab. Corp. of Am., 290 F.3d 1301, 1310 (11th Cir. 2002) (False Claims Act qui tam complaints must allege the specific false claims submitted).

The relaxed standard for fraud by omission

Particularity rules are harder to apply when the alleged fraud is an omission rather than an affirmative misstatement. A plaintiff who claims the defendant failed to disclose something cannot, by definition, identify the time, place, or contents of the missing statement.

Federal courts have responded with a relaxed standard for omissions. The plaintiff must still plead what was omitted, the speaker's duty to disclose it, the context in which disclosure was required, and how the omission misled the plaintiff. But the who-what-when-where-how rubric is applied with common sense: the "when" is the period during which disclosure was owed, not a specific date a sentence was withheld.

Defense briefs facing an omission theory should not concede that 9(b) is satisfied just because the plaintiff invokes the omission label. Two questions still matter. First, has the plaintiff identified a duty to disclose? Absent fiduciary duty, statutory duty, or a partial disclosure that made silence misleading, there is no actionable omission. Second, has the plaintiff identified the specific information the defendant was obligated to disclose? Vague allegations that the defendant "concealed material facts" do not satisfy 9(b) even under the relaxed standard.

The group-pleading problem

A recurring failure mode in fraud complaints is group pleading: the complaint refers to "Defendants" collectively without identifying which defendant made which statement. Rule 9(b) generally does not permit this. Each defendant is entitled to particularized allegations of its own conduct. See Swartz v. KPMG LLP, 476 F.3d 756, 764-65 (9th Cir. 2007) (Rule 9(b) does not allow a complaint to lump multiple defendants together; plaintiff must inform each defendant of its specific role in the alleged fraud).

The defense brief should isolate every paragraph that uses collective terms ("Defendants represented," "Defendants knew") and demand that the plaintiff specify which defendant said or knew what. If the complaint cannot do that for any given defendant, dismissal as to that defendant is appropriate.

There is a narrow exception for officers and directors of a closely held corporation, where courts sometimes allow inferences of joint participation. The PSLRA partially abrogated the "group pleading" presumption in securities cases by requiring plaintiff to specify the role of each individual defendant. Outside that narrow context, defendants should not be left guessing which alleged misrepresentation is attributed to them.

How to brief the motion

A clean Rule 9(b) motion follows a tight structure.

Introduction

State plainly that the complaint alleges fraud (or claims that sound in fraud), that Rule 9(b) applies, and that the complaint does not satisfy it. One paragraph. The judge should know what is coming.

Legal standard

Two short sections. First, the 9(b) particularity standard: lead with Vess or the leading authority in your circuit, and cite Tellabs if a securities claim is involved. Second, the interaction with Twombly and Iqbal: explain that the plausibility floor applies even to conditions of mind alleged generally.

Argument

Organize by claim, not by defendant. For each fraud-based claim:

Quote the elements that depend on fraudulent conduct.
Identify what the complaint must allege with particularity to satisfy each element.
Walk paragraph by paragraph through the complaint's fraud allegations, marking what is missing from the who-what-when-where-how rubric.
Address scienter separately. If the complaint relies on conclusory allegations of knowledge or intent, say so and cite Iqbal.

If the case involves group pleading, dedicate a subsection to it. Pull the offending paragraphs into the brief and ask the court to require the plaintiff to specify which defendant did what.

Conclusion

Ask for dismissal. Whether dismissal should be with or without leave to amend depends on context. Particularity failures are often curable, and the prevailing rule under Foman v. Davis, 371 U.S. 178 (1962), is that leave to amend is freely given. A first 9(b) dismissal is almost always without prejudice. A second is a better candidate for finality.

What sinks a 9(b) motion

Three common failures.

Overreach. Defendants who argue that every allegation in the complaint fails particularity invite the court to read the complaint sympathetically and find at least some allegations that pass. Lead with the strongest deficiencies. Concede the obvious in service of credibility.

Ignoring the relaxed omission standard. If any portion of the alleged fraud is an omission, the brief must address the relaxed standard rather than apply the affirmative-misstatement rubric. A motion that argues "the complaint does not specify the words spoken" against an omission claim is a wasted motion.

Treating Rule 9(b) as a substitute for Rule 12(b)(6). Rule 9(b) is a pleading standard, not a merits test. Defendants who try to argue that the alleged misrepresentation was not actually false, or that the plaintiff cannot prove reliance, are litigating the wrong motion. Save merits arguments for summary [judgment](/insights/glossary/judgment).

The bottom line

Rule 9(b) is a strong dismissal tool when the complaint lumps defendants together, alleges fraud in vague conclusory terms, or relies on scienter language without supporting facts. It is less useful against carefully drafted complaints that have actually done the work of identifying speakers, statements, dates, and reasons for falsity. The motion succeeds when the brief: identifies the right particularity standard (9(b) alone for ordinary fraud, 9(b) plus the PSLRA for securities cases), walks the court through the complaint's specific deficiencies element by element, and addresses scienter under the Iqbal gloss rather than treating it as automatically satisfied by generalities.

For plaintiffs facing a 9(b) motion, the response should do the opposite: produce a paragraph-by-paragraph chart that maps each who-what-when-where-how requirement to a specific allegation, distinguish affirmative misrepresentations from omissions, and ask for leave to amend if any element is deficient. Rule 9(b) is rarely the end of a case at the first motion. It is almost always the end of the lazy complaint.