Rule 12(b)(2) Motion to Dismiss: Personal Jurisdiction in Federal Court

A Rule 12(b)(2) motion to dismiss asks a federal court to throw out a case because it has no personal jurisdiction over the defendant. The court decides two questions: whether the forum state's long-arm reach covers the defendant under Rule 4(k), and whether exercising that reach is consistent with due process. The plaintiff carries the burden.

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

Personal vs. subject-matter jurisdiction

Subject-matter jurisdiction asks whether this kind of court may hear this kind of case. Personal jurisdiction asks whether this court has power over this defendant. The first cannot be waived or conferred by consent, and the second can. That is why Rule 12(b)(1) can be raised at any time while 12(b)(2) is lost if you do not raise it in time. They often share a motion but run on separate tracks.

The defense itself is four words: FRCP 12(b)(2) lists "lack of personal jurisdiction." Everything else comes from Rule 4 and the Constitution. For the full menu of Rule 12 defenses, see our motion to dismiss guide.

Step one: Rule 4(k) decides whose long-arm statute applies

The first question is statutory, not constitutional. Rule 4(k)(1) says that serving a summons or filing a waiver of service "establishes personal jurisdiction over a defendant" in three situations:

In an ordinary diversity case, 4(k)(1)(A) does the work. The federal court borrows the reach of the forum state's courts, which means the state's long-arm statute and the Fourteenth Amendment limit on it. Many state statutes reach as far as due process allows, so the two inquiries collapse into one. Some do not, and there you must satisfy the statute and then the Constitution.

Rule 4(k)(2) is the exception for federal claims. It applies when the claim "arises under federal law," the defendant "is not subject to jurisdiction in any state's courts of general jurisdiction," and "exercising jurisdiction is consistent with the United States Constitution and laws." It matters most for foreign defendants with enough contacts with the United States as a whole but not with any single state.

A 2025 Supreme Court decision belongs to the 4(k)(1)(C) lane, where Congress supplies the jurisdiction. In Fuld v. Palestine Liberation Organization, No. 24-20 (U.S. June 20, 2025), the Court unanimously upheld a federal statute's jurisdiction provision against a Fifth Amendment due process challenge. It does not change the analysis for a typical state-law claim against an out-of-state company.

Step two: general jurisdiction asks where the defendant is at home

The constitutional test starts with International Shoe: a defendant outside the forum must "have certain minimum contacts with it such that the maintenance of the suit does not offend 'traditional notions of fair play and substantial justice.'" International Shoe Co. v. Washington, 326 U.S. 310, 316 (1945).

Courts since then have split the analysis into general vs. specific jurisdiction. General jurisdiction lets a court hear any claim against the defendant, related to the forum or not. The Court narrowed it sharply in Daimler AG v. Bauman, 571 U.S. 117 (2014). A corporation is subject to general jurisdiction where its affiliations with the state are "so 'continuous and systematic' as to render [it] essentially at home," and "the place of incorporation and principal place of business are 'paradig[m] . . . bases for general jurisdiction.'" Id. at 127, 137. Daimler left open the "exceptional case" in which a corporation's operations elsewhere are so substantial that it is at home there too. Id. at 139 n.19.

The practical result: doing a lot of business in a state no longer makes a company answerable there for anything. A plaintiff suing a national retailer in a state where it merely has stores should expect to argue specific jurisdiction instead.

Consent by registration after Mallory

A second route to general jurisdiction does not depend on being at home. In Mallory v. Norfolk Southern Railway Co., 600 U.S. 122 (2023), the Court held that a state law requiring out-of-state corporations to consent to personal jurisdiction as a condition of registering to do business does not violate the Due Process Clause when the corporation has complied with the requirement. Justice Gorsuch wrote the lead opinion for a 5-4 Court. Justice Alito, concurring, flagged that such a statute might still face a dormant Commerce Clause challenge.

Mallory did not say every registration statute works. It rested on a state law that treated registration as consent. Whether a given state's statute does that, and whether its courts read it that way, is a state-law question to research. Neither side should assume the answer.

Step three: specific jurisdiction asks about the claim

Specific jurisdiction is the ordinary route. The Ninth Circuit's formulation is representative: the defendant must have purposefully directed activities at the forum or purposefully availed itself of the privilege of conducting activities there; the claim must arise out of or relate to those forum-related activities; and exercising jurisdiction must be reasonable. Dole Food Co. v. Watts, 303 F.3d 1104, 1111 (9th Cir. 2002). Other circuits phrase it differently, so confirm your circuit's wording.

Two Supreme Court decisions define the edges.

The defendant's contacts must be its own. Walden v. Fiore held that "the relationship must arise out of contacts that the 'defendant himself' creates with the forum State," and that "the plaintiff cannot be the only link between the defendant and the forum." Walden v. Fiore, 571 U.S. 277, 284-85 (2014). Knowing where the plaintiff lives is not enough.

The claim need not be caused by the contacts. The "arise out of or relate to" phrase has two halves. In Ford Motor Co. v. Montana Eighth Judicial District Court, 592 U.S. 351 (2021), the Court explained: "The first half of that standard asks about causation; but the back half, after the 'or,' contemplates that some relationships will support jurisdiction without a causal showing." Ford had systematically served the Montana and Minnesota markets for the vehicles at issue, so those states could hear product claims about cars that were originally sold elsewhere.

Plaintiffs reach for Ford when the defendant's forum business is real but the particular product or transaction came through another door. It does not erase the requirement of a real, related connection.

How courts decide a Rule 12(b)(2) motion to dismiss

The jurisdictional facts are rarely all in the complaint, so the motion is argued on declarations. The defendant files one describing where it is organized, where it keeps offices and employees, and what it does in the forum. The plaintiff answers with its own.

Attaching evidence does not convert a 12(b)(2) motion into one for summary judgment. Rule 12(d) applies only to motions "under Rule 12(b)(6) or 12(c)." The court may consider affidavits directly, and under Rule 12(i), a party can ask that the defense be decided before trial.

The plaintiff's burden turns on the procedure the court chooses.

The Ninth Circuit states the first row this way: where the motion "is based on written materials rather than an evidentiary hearing, 'the plaintiff need only make a prima facie showing of jurisdictional facts.'" Dole Food, 303 F.3d at 1108. The Second Circuit lays out both rows in Ball v. Metallurgie Hoboken-Overpelt, S.A., 902 F.2d 194, 197 (2d Cir. 1990). If the defendant only challenges the sufficiency of the allegations, the plaintiff "need persuade the court only that its factual allegations constitute a prima facie showing"; if the defendant contests the facts, "a hearing is required, at which the plaintiff must prove the existence of jurisdiction by a preponderance of the evidence." Circuits differ on details, such as how much weight to give the defendant's contrary evidence before a hearing, so your own circuit's case law governs.

Jurisdictional discovery

When the facts about the defendant's forum activity are disputed or sit in the defendant's files, the plaintiff can ask for targeted discovery before the ruling. Courts have discretion here, and a plaintiff who offers only a hunch usually loses. Ask for specific categories, say why the declaration leaves them open, and propose a short window.

Discovery cuts both ways. In Insurance Corp. of Ireland v. Compagnie des Bauxites de Guinee, the defendant repeatedly failed to comply with court-ordered discovery on jurisdictional facts. The Court upheld treating jurisdiction as established, reasoning that "the requirement of personal jurisdiction represents first of all an individual right" that "can, like other such rights, be waived." Insurance Corp. of Ireland, 456 U.S. 694, 703 (1982).

Waiver, in one paragraph

Rule 12(h)(1) provides that "A party waives any defense listed in Rule 12(b)(2)–(5)" by omitting it from a Rule 12 motion in the circumstances Rule 12(g)(2) describes, or by failing to make it by motion or include it in a responsive pleading or an amendment allowed as of course. So the defense belongs in your first Rule 12 motion or your answer. Insurance Corp. of Ireland adds that litigation conduct alone can forfeit it. Our guides to answering a complaint and the motion to dismiss cover the waiver mechanics in full.

For the plaintiff: building the record before the motion

1. Plead the jurisdictional facts. State where the defendant is organized and headquartered, and what it did in the forum that gave rise to your claim. Conclusions do not count as facts.
2. Match the facts to the long-arm statute. Cite the subsection you rely on, not just the statute.
3. Prepare the opposition declaration early. Put in contracts, shipments, advertising aimed at the forum, registrations and employees, with exhibits, from someone with personal knowledge.
4. Request jurisdictional discovery in the alternative. Put it in the brief, with specifics, not in a footnote.
5. Check the registration statute. After Mallory, a defendant that registered to do business may have consented to general jurisdiction.

For the defendant, the mirror image: raise the defense in the first filing and support it with an accurate declaration from someone with personal knowledge. An incomplete declaration can cost the credibility the motion depends on.

Research the circuit, then check the cases

The doctrine is national but the details are local: your state's long-arm statute, your circuit's phrasing of the specific-jurisdiction test, and its rule on the prima facie standard. Start with controlling authority in your circuit, then confirm each case is still good law. Personal jurisdiction law moved quickly between 2014 and 2023, and pre-Daimler opinions can state rules that no longer hold.

CaseRead searches the public law and your firm's own files in one matter-scoped query, so the circuit's authority on the prima facie standard and the facts in your client's declaration come back together, each cited to its source. If you are responding to a motion to dismiss, check every case the defendant cites the same way.

Frequently asked questions

What is a Rule 12(b)(2) motion to dismiss?

It is a motion asking a federal court to dismiss a case because the court lacks personal jurisdiction over the defendant. The defendant argues that serving it did not bring it within the court's power, either because the forum state's long-arm reach does not extend that far or because the Due Process Clause forbids it. The defendant usually supports the motion with a declaration about its contacts.

Who has the burden on a 12(b)(2) motion?

The plaintiff. Courts consistently place the burden of showing jurisdiction on the party invoking it. How much the plaintiff must show depends on the stage: a prima facie showing is enough when the court decides the motion on the papers, while a disputed fact decided at an evidentiary hearing or trial must be proved by a preponderance of the evidence.

What is the difference between general and specific jurisdiction?

General jurisdiction lets a court hear any claim against a defendant because the defendant is essentially at home in the forum; for a corporation that is ordinarily its place of incorporation and principal place of business. Specific jurisdiction is narrower. It covers only claims that arise out of or relate to the defendant's own contacts with the forum state.

Can the court allow discovery before ruling on personal jurisdiction?

Yes. Courts have discretion to permit jurisdictional discovery when the facts are disputed or peculiarly within the defendant's knowledge. Plaintiffs generally have to ask for it and explain what they expect to find, since a bare hope of finding contacts rarely persuades. A defendant who ignores court-ordered jurisdictional discovery can have jurisdiction treated as established.

Can a defendant lose the personal jurisdiction defense without filing the motion?

Yes. Rule 12(h)(1) waives the defense if the defendant omits it from its first Rule 12 motion or leaves it out of its answer. Litigation conduct can forfeit it as well, since the personal jurisdiction requirement protects an individual right that, like other such rights, can be waived. A defendant who wants the defense should raise it first and promptly.

Before you file the brief

Personal jurisdiction briefs are citation-dense, and the leading cases are famous enough that a bad cite stands out. Run the draft through the Hallucination Shield before it goes out. It is free, needs no signup, checks up to 50 citations per run and flags any it cannot verify. A wrong reporter cite for Ford or an invented circuit case is the kind of error opposing counsel will happily point out.

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