A defendant’s motion to dismiss template needs four working parts: a caption identifying the court and case, a clear statement of which Rule 12(b) ground you’re invoking, a legal argument explaining why the complaint fails under that ground, and a signed request for the specific relief you want. Get those right, file within the deadline, and serve the opposing party properly, and the document will do its job.
File Within 21 Days of Service
In federal court, you have 21 days after being served with the summons and complaint to respond. That response can be an answer or a motion to dismiss, but if you’re moving to dismiss, the motion goes first and pauses the deadline for your answer. If the court denies the motion, you get 14 days from that ruling to file your answer.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections
Some grounds disappear if you don’t raise them the first time you respond. Personal jurisdiction, improper venue, insufficient process, and insufficient service of process are all waived if omitted from your first motion or answer.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections Subject matter jurisdiction is the exception; it can be raised at any point. State courts follow similar structures, with the specific number of days varying by jurisdiction.
Pick the Right Rule 12(b) Ground First
Before drafting, decide which ground your motion rests on. Everything else in the document is built around this choice. Rule 12(b) lists seven:
- Lack of subject matter jurisdiction. The court has no legal authority to hear this type of case. A state court cannot decide a patent dispute; a federal court needs a federal question or diversity of citizenship.
- Lack of personal jurisdiction. You don’t have enough connection to the state where the suit was filed, based on residency, business activity, or actions directed at that state.
- Improper venue. The case was filed in the wrong district or county under the applicable venue rules, even if the court itself has jurisdiction.
- Insufficient process. The summons or complaint has a defect, such as a wrong name or missing required information.
- Insufficient service of process. The papers weren’t delivered according to the rules, whether by an unauthorized server or at the wrong address.
- Failure to state a claim. Even taking every fact alleged as true, the complaint doesn’t describe conduct that violates any law or entitles the plaintiff to a remedy. This is the ground raised most often.
- Failure to join a required party. Someone who needs to be part of the suit for fair resolution hasn’t been included.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections
Two common defenses ride inside these grounds rather than standing alone. A statute of limitations argument is raised through failure to state a claim when the complaint’s own dates show the filing deadline passed. A standing argument is raised as a challenge to subject matter jurisdiction.
The Plausibility Standard for 12(b)(6)
Because failure to state a claim is the most frequently used ground, the standard your argument has to meet is worth understanding before you write. The Supreme Court set that standard in Bell Atlantic v. Twombly and Ashcroft v. Iqbal. A complaint must contain enough factual matter, accepted as true, to state a claim to relief that is plausible on its face. A claim is facially plausible when the pleaded facts let the court draw a reasonable inference that the defendant is liable.2Justia Law. Ashcroft v. Iqbal, 556 U.S. 662 (2009)
You are not arguing the plaintiff’s facts are wrong. You’re arguing that even if every allegation is true, the complaint still fails, either because the facts describe no recognized legal wrong, or because they’re too vague and conclusory to support a reasonable inference of liability. In the argument section of your motion, walk the court through the specific elements the plaintiff must plead, then identify which ones the complaint doesn’t address. Vague assertions that the complaint is “insufficient” accomplish nothing. Point to the gap between what the law requires and what the plaintiff actually wrote.
Standard Sections of the Document
Every motion must be in writing, spell out the specific reasons for the request, and identify the relief sought.3Legal Information Institute. Federal Rules of Civil Procedure Rule 7 – Pleadings Allowed; Form of Motions and Other Papers In practice, a defendant’s motion to dismiss follows the same structure regardless of the ground.
Caption and Title
Open with a caption listing the court’s name, the parties’ names, and the case number.4Legal Information Institute. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings Title the document clearly, for example, “Defendant’s Motion to Dismiss Pursuant to Federal Rule of Civil Procedure 12(b)(6).” A short opening paragraph identifies who you are, which complaint you’re responding to, and which ground you’re invoking. Judges read dozens of these; they want the ask up front.
Legal Argument
The argument is the substance of the motion. Many courts require it in a separate document, often called a memorandum of law or brief in support, rather than inside the motion itself. Check your court’s local rules before drafting. Some want a combined document; others want a short motion filed alongside a supporting brief. Local rules also set page limits, font size, margins, and line spacing. Ignoring these can get the filing rejected at the clerk’s office before a judge sees it.
Whether combined or separate, the argument opens with the applicable legal standard, lists the elements the plaintiff must plead, and then explains point by point why the complaint falls short. Cite case law from your jurisdiction wherever possible. A 12(b)(6) argument built only on statutory text is weaker than one showing how courts in your district have already rejected similar allegations. For a jurisdictional defense, attach supporting evidence, such as an affidavit about your lack of contacts with the forum state.
Conclusion and Request for Relief
End with a clear request. Ask the court to dismiss the complaint, and state whether you’re seeking dismissal with or without prejudice. If you’re challenging only certain claims, identify which ones. A dismissal with prejudice ends the matter permanently; a dismissal without prejudice lets the plaintiff refile after fixing the problem.
Signature Block
The motion must be signed by an attorney of record or, if you’re unrepresented, by you personally. The signature block includes name, address, email, and phone number.5Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions A court must strike any unsigned paper unless the omission is promptly corrected once flagged.
Filing and Serving the Motion
File the completed motion with the court clerk’s office. Most federal courts require electronic filing through CM/ECF, which automatically serves registered attorneys. If the opposing party is not a registered e-filer, which is common when the plaintiff is self-represented, serve them separately by mail, hand delivery, or another method the rules permit.6Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers
E-filing needs no separate certificate of service. For every other method, file a certificate of service with the court, either with the motion or within a reasonable time afterward.6Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers The certificate is a brief statement saying when and how you delivered the papers. Improper service can lead the court to disregard the motion entirely.
What Your Signature Certifies
The signature is not just a formality. By signing, you certify that the legal arguments are supported by existing law or by a reasonable argument for changing it, and that the motion isn’t being filed to harass, delay, or drive up costs.5Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions
If the court finds a violation, it can impose sanctions: non-monetary directives, penalties paid to the court, or an order reimbursing the opposing party’s attorney’s fees caused by the violation. A law firm can be held jointly responsible for its attorney’s violation.5Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions The rule includes a safety valve: when an opposing party serves a sanctions motion on you, you have 21 days to withdraw or correct the filing before the motion goes to the court. A debatable legal theory that loses is not frivolous. Sanctions are reserved for filings that no reasonable attorney could have believed were warranted.
If You’re Filing Without an Attorney
Courts hold pro se motions to a somewhat more lenient standard on technical form, but the deadlines, service requirements, and substantive law apply the same way. A judge will likely rule from your papers alone, so the writing has to carry the whole argument.
Write in plain language. You don’t need to imitate legal jargon; clarity beats formality. When you cite a case, explain why it applies to your situation instead of just dropping the citation. Focus on the elements of the plaintiff’s claim and identify what the complaint is missing. Check your court’s website for pro se resources and sample forms; many federal district courts and state courts publish handbooks that cover filing procedures and common pitfalls. The clerk’s office can answer questions about deadlines and formatting, but staff cannot advise you on what arguments to make.