Rule 12(b)(1) Motion to Dismiss: Facial vs. Factual Attacks on Subject-Matter Jurisdiction

A Rule 12(b)(1) motion to dismiss asks a federal court to dismiss a case because it lacks subject-matter jurisdiction: no federal question, no complete diversity, no standing, or some other defect in the court's power to hear the dispute. The motion comes in two forms, facial and factual, and the form decides what the judge may look at and whether the complaint's allegations are presumed true.

This guide covers federal court only. For the general mechanics, start with our motion to dismiss overview.

What FRCP 12(b)(1) says, and when to raise it

Federal Rule of Civil Procedure 12(b)(1) lets a party raise "lack of subject-matter jurisdiction" by motion rather than in the answer, and Rule 12(b) provides that "a motion asserting any of these defenses must be made before pleading if a responsive pleading is allowed." The usual deadline is therefore 21 days after service of the summons and complaint, the answer's clock under Rule 12(a)(1)(A)(i). Our guide to answering a complaint covers it and the waiver table.

Missing that deadline does not forfeit this defense. Rule 12(h)(3) says: "If the court determines at any time that it lacks subject-matter jurisdiction, the court must dismiss the action." The defenses in Rule 12(b)(2) through (5) are waived if a party omits them from a first Rule 12 motion or from the answer. This one is not. In a removed case, 28 U.S.C. § 1447(c) says the same thing in remand form: "If at any time before final judgment it appears that the district court lacks subject matter jurisdiction, the case shall be remanded."

The Supreme Court states the principle flatly: "subject-matter jurisdiction, because it involves a court's power to hear a case, can never be forfeited or waived." Arbaugh v. Y & H Corp., 546 U.S. 500, 514 (2006) (quoting United States v. Cotton, 535 U.S. 625, 630 (2002)). Consent from the other side does not cure a jurisdictional defect.

Who carries the burden

The burden falls on the party invoking federal jurisdiction, and the presumption runs against jurisdiction. "Federal courts are courts of limited jurisdiction. They possess only that power authorized by Constitution and statute." And: "It is to be presumed that a cause lies outside this limited jurisdiction, and the burden of establishing the contrary rests upon the party asserting jurisdiction." Kokkonen v. Guardian Life Insurance Co. of America, 511 U.S. 375, 377 (1994) (citations omitted).

That reverses the Rule 12(b)(6) posture, where the movant must show the complaint fails. In a removed case, the removing defendant is the party invoking federal jurisdiction and carries the burden.

Standing is the clearest example. A plaintiff must show injury in fact, a causal connection to the challenged conduct, and likely redressability. "The party invoking federal jurisdiction bears the burden of establishing these elements," and each element "must be supported in the same way as any other matter on which the plaintiff bears the burden of proof, i.e., with the manner and degree of evidence required at the successive stages of the litigation." Lujan v. Defenders of Wildlife, 504 U.S. 555, 560-61 (1992). At the pleading stage, general factual allegations of injury can be enough. At summary judgment, or once a factual challenge puts evidence in the record, they are not.

Facial attacks: the complaint on its face

A facial attack accepts the plaintiff's allegations as true and argues they "are insufficient on their face to invoke federal jurisdiction." Safe Air for Everyone v. Meyer, 373 F.3d 1035, 1039 (9th Cir. 2004). The movant files no evidence. The question is whether the pleading alleges a basis for jurisdiction.

Courts review a facial attack much like a Rule 12(b)(6) motion. In the Ninth Circuit, the court accepts the allegations as true, draws reasonable inferences for the plaintiff, and determines whether the allegations "are sufficient as a legal matter to invoke the court's jurisdiction." Leite v. Crane Co., 749 F.3d 1117, 1121 (9th Cir. 2014).

Plausibility still matters on a facial attack. Leite says a plaintiff "must allege facts, not mere legal conclusions, in compliance with the pleading standards established by" Twombly and Iqbal. The Seventh Circuit went further and held that "when evaluating a facial challenge to subject matter jurisdiction under Rule 12(b)(1), a court should use Twombly-Iqbal's 'plausibility' requirement, which is the same standard used to evaluate facial challenges to claims under Rule 12(b)(6)," noting that it was joining "many of our sister circuits." Silha v. ACT, Inc., 807 F.3d 169, 174 (7th Cir. 2015).

So a complaint that says "this court has jurisdiction under 28 U.S.C. § 1331" with no facts showing a federal claim can lose on a facial attack. Confirm that your circuit follows Silha before relying on it; binding vs. persuasive authority explains how much weight another circuit's rule carries.

Factual attacks: the evidence comes in

In a factual attack, the challenger "disputes the truth of the allegations that, by themselves, would otherwise invoke federal jurisdiction." Safe Air, 373 F.3d at 1039. The movant files declarations, exhibits, or deposition excerpts, and the ground rules shift.

The Ninth Circuit's statement of the rule is widely quoted: the court "may review evidence beyond the complaint without converting the motion to dismiss into a motion for summary judgment," it "need not presume the truthfulness of the plaintiff's allegations," and once the movant presents evidence "the party opposing the motion must furnish affidavits or other evidence necessary to satisfy its burden of establishing subject matter jurisdiction." Safe Air, 373 F.3d at 1039 (citations omitted). Leite adds that the plaintiff must then support the jurisdictional allegations with "competent proof" under the same evidentiary standard that governs at summary judgment.

The Seventh Circuit agrees: on a factual challenge, "the court may look beyond the pleadings and view any evidence submitted to determine if subject matter jurisdiction exists." Silha, 807 F.3d at 173.

Contrast Rule 12(d): on a Rule 12(b)(6) motion, matters outside the pleadings that the court does not exclude convert the motion to one for summary judgment, and all parties must get a reasonable opportunity to present pertinent material. A factual attack has no conversion step because the court is deciding its own power to hear the case, not the merits.

The exception: jurisdiction intertwined with the merits

Factual attacks have a limit when jurisdiction and the merits turn on the same facts. The Ninth Circuit held that a "[j]urisdictional finding of genuinely disputed facts is inappropriate when 'the jurisdictional issue and substantive issues are so intertwined that the question of jurisdiction is dependent on the resolution of factual issues going to the merits' of an action." Safe Air, 373 F.3d at 1039 (citation omitted). The issues are intertwined where "a statute provides the basis for both the subject matter jurisdiction of the federal court and the plaintiff's substantive claim for relief." Id. Leite repeats the caveat: the court must leave resolution of material factual disputes to the trier of fact when jurisdiction is intertwined with an element of the merits.

In practice the court then treats the motion under the Rule 12(b)(6) or Rule 56 standard. A plaintiff facing a factual attack should look for this argument: the "jurisdictional" fact the defendant disputes is really an element of the claim. Other circuits phrase the exception differently, so cite your own court's formulation.

Jurisdictional limit or just an element?

Not every statutory requirement is jurisdictional, and the label moves a defense out of Rule 12(b)(6) and into 12(b)(1), with consequences for waiver and timing. The Supreme Court drew the line in Arbaugh: "when Congress does not rank a statutory limitation on coverage as jurisdictional, courts should treat the restriction as nonjurisdictional in character." 546 U.S. at 516. There, Title VII's 15-employee threshold was "an element of a plaintiff's claim for relief, not a jurisdictional issue."

The practical test: does the statute speak in terms of the court's power, or does it define who can win? If it is the second, the defense is waivable and belongs in a Rule 12(b)(6) motion or an answer. A movant who mislabels the defense invites the court to recharacterize or deny the motion. A respondent can use Arbaugh to pull the dispute into a framework where the allegations are accepted as true.

Common jurisdiction defects

Two cautions. First, a corporation is "deemed to be a citizen of every State and foreign state by which it has been incorporated and of the State or foreign state where it has its principal place of business" (§ 1332(c)(1)). Diversity attacks tend to be factual because the key facts are not in the complaint.

Second, sovereign immunity does not fit neatly. The Supreme Court has said the Eleventh Amendment "does not automatically destroy original jurisdiction. Rather, the Eleventh Amendment grants the State a legal power to assert a sovereign immunity defense should it choose to do so. The State can waive the defense." Wisconsin Department of Corrections v. Schacht, 524 U.S. 381, 389 (1998). Courts have not all agreed on whether immunity is properly raised under Rule 12(b)(1) or Rule 12(b)(6), so check how your circuit treats it before choosing the vehicle.

Responding to a Rule 12(b)(1) motion to dismiss

If you are the plaintiff, first identify the kind of attack. A motion with no exhibits or declarations is facial, so answer it on the pleading: point to the facts that support jurisdiction and, if needed, seek leave to amend. The strategy in our guide to responding to a motion to dismiss applies, with one shift: you carry the burden, so you cannot simply say the motion fails to show a defect.

If it is factual, you must "furnish affidavits or other evidence," so a bare brief will not do. Put declarations on the jurisdictional facts: citizenship, the amount in controversy, the facts supporting each standing element. If the facts you need are in the defendant's hands, ask for limited jurisdictional discovery and say what you expect it to show. Then make the intertwined argument if it fits.

If you are the defendant, decide early whether to attack facially or factually. A facial attack is cheap but takes the plaintiff's allegations as true. A factual attack needs evidence you can authenticate and invites a counter-record. Do not bury a jurisdictional defect in a long Rule 12(b)(6) motion or hold one back for tactics. Under Rule 12(h)(3) it can surface later, after the money is spent.

Pro se plaintiffs see this motion often, because standing and sovereign-immunity defenses are common in suits against government defendants. The same rules apply. A clear declaration on the facts is worth more than another page of argument.

Finding authority in your circuit

Facial-versus-factual law is circuit law. The standards above come from the Ninth and Seventh Circuits; yours may differ in wording or in how it handles plausibility and the intertwined exception. Start with finding controlling authority in your circuit and district, then confirm each case is still good law with a citing-case check. CaseRead searches federal and state law and your matter's documents in one query, and its citing-case screen shows later treatment. The matter's deadlines calendar can hold the responsive-pleading date a 12(b)(1) motion has to beat.

Frequently asked questions

What is a Rule 12(b)(1) motion to dismiss?

It is a motion asking a federal court to dismiss a case because the court lacks subject-matter jurisdiction, meaning the power to hear that kind of case. The defect is typically that no federal question or complete diversity exists, the plaintiff lacks Article III standing, or the claim is moot or barred by sovereign immunity.

What is the difference between a facial and a factual attack under Rule 12(b)(1)?

A facial attack says the complaint, taken as true, does not allege a basis for jurisdiction, so the court looks only at the pleading. A factual attack disputes the truth of the jurisdictional allegations with evidence, and the court may weigh that evidence without presuming the plaintiff's allegations are true.

Who has the burden of proof on a 12(b)(1) motion?

The party invoking federal jurisdiction, which is usually the plaintiff. Federal courts are presumed to lack jurisdiction until the party asserting it shows otherwise. For standing, each element must be supported with the manner and degree of evidence required at the successive stages of the litigation.

Can a 12(b)(1) motion be filed after the answer?

In effect, yes. Rule 12(h)(3) provides that if the court determines at any time that it lacks subject-matter jurisdiction, it must dismiss the action. Unlike the defenses in Rule 12(b)(2) through (5), this one is not waived by omitting it from an earlier motion or from the answer, and either a party or the court can raise it later.

Can the parties consent to federal jurisdiction?

No. Subject-matter jurisdiction concerns the court's power to hear a case, so the Supreme Court says it can never be forfeited or waived. Agreement or silence from the parties does not create it, and a court that notices a defect must act on it whether or not anyone has moved.

Before you file or oppose

A 12(b)(1) brief rests on a few circuit cases, and a citation to one that does not exist gives the court a second problem. Run the draft through the Hallucination Shield before filing. It is free, needs no signup, and checks up to 50 citations per run, flagging any it cannot verify. Quotations and pin cites still need a read against the opinion itself.

This article is for general information and is not legal advice. For guidance on a specific case, consult a licensed attorney in your jurisdiction.