Motion to Dismiss: Grounds, Filing Process, and What Happens Next

A motion to dismiss is a defendant's pretrial request asking the court to throw out a civil case without ever reaching the merits. Filed under Federal Rule of Civil Procedure 12(b) (or its state-court equivalent), the motion argues that even if every fact in the complaint were true, the plaintiff still has no legal right to relief, the wrong court was chosen, the wrong defendant was served, or some other gateway defect bars the lawsuit. If granted, the case ends, often within sixty to ninety days of filing the complaint, before any discovery, depositions, or trial costs are incurred.

This guide covers every Rule 12(b) ground, the procedural mechanics of filing and opposing the motion, the realistic odds of success in federal and state courts, the difference between dismissal with and without prejudice, and how a motion to dismiss fits beside related procedures like summary judgment vs motion to dismiss, demurrers, and Rule 12(b)(6) failure-to-state-a-claim challenges. The article assumes you are a defendant or pro se litigant evaluating whether dismissal is realistic, not a plaintiff trying to defeat one, though the same rules apply in reverse.

The Seven Rule 12(b) Grounds for Dismissal

Federal Rule 12(b) Lists seven enumerated defenses that may be raised by motion before answering the complaint. Each ground attacks a different threshold requirement, and most state procedural codes mirror these categories with minor renumbering.

Rule	Ground	What It Attacks	Waiver If Not Raised
12(b)(1)	Lack of subject-matter jurisdiction	Court has no power to hear this type of dispute	Never waived
12(b)(2)	Lack of personal jurisdiction	Court has no authority over this defendant	Waived if not raised in first motion
12(b)(3)	Improper venue	Wrong geographic court within the system	Waived if not raised in first motion
12(b)(4)	Insufficient process	Summons or complaint defective on its face	Waived if not raised in first motion
12(b)(5)	Insufficient service of process	Defendant was not properly served	Waived if not raised in first motion
12(b)(6)	Failure to state a claim upon which relief can be granted	Allegations don't add up to a recognized cause of action	Preserved through trial
12(b)(7)	Failure to join a party under Rule 19	Indispensable party missing from the case	Preserved through trial

The two most commonly invoked grounds are 12(b)(6) failure to state a claim and 12(b)(2) lack of personal jurisdiction. The least commonly granted is 12(b)(7), because joinder defects are usually curable. Subject-matter jurisdiction (12(b)(1)) is unique because federal courts have an independent duty to police it, and the issue can be raised at any point in the litigation, even on appeal after a verdict.

Why the Motion Exists: Gatekeeping Function

Civil litigation in federal court can cost a defendant $200,000 to $2 million in legal fees through trial, and even $25,000 to $80,000 simply to reach the close of discovery. The motion to dismiss exists to end frivolous or legally defective lawsuits before either side incurs those costs. The Supreme Court formalized the gatekeeping standard in Bell Atlantic Corp. V. Twombly, 550 U.S. 544 (2007) and Ashcroft v. Iqbal, 556 U.S. 662 (2009), which together require that a complaint allege "enough facts to state a claim to relief that is plausible on its face." Conclusory recitals of legal elements without supporting facts do not survive.

The plausibility standard transformed federal pleading practice. Before 2007, the controlling standard from Conley v. Gibson, 355 U.S. 41 (1957) was that a complaint should not be dismissed unless "no set of facts" could support relief, a forgiving test that defeated almost every motion. Twombly And Iqbal Raised the bar substantially, and grant rates for 12(b)(6) motions roughly doubled in the years after.

Procedural Mechanics: When and How to File

Under FRCP 12(a)(1)(A)(i), a defendant has twenty-one days after service of the summons and complaint to either answer or file a motion to dismiss. If a defendant timely waives service under Rule 4(d), the deadline extends to sixty days from the date the waiver request was sent. Filing a motion to dismiss tolls (pauses) the answer deadline, and the defendant gets fourteen days from the court's ruling to file an answer if the motion is denied.

The motion itself consists of three documents: the motion (a one-page request stating the rule and grounds), a supporting memorandum of law (the substantive brief, typically ten to twenty-five pages), and a proposed order. Local rules in most federal districts cap the brief at twenty-five pages absent leave of court, and many districts require a separate concise statement of issues. Exhibits are limited; attaching extrinsic evidence converts the motion to one for summary judgment under Rule 12(d), which requires giving the plaintiff "a reasonable opportunity to present all the material that is pertinent to the motion."

The Standard the Court Applies

On a 12(b)(6) motion, the court accepts every well-pleaded factual allegation as true, draws all reasonable inferences in the plaintiff's favor, and asks whether the complaint plausibly states a claim. Legal conclusions, threadbare recitals of elements, and conclusory statements are not entitled to the assumption of truth. The court may consider the complaint, documents attached to or incorporated by reference in the complaint, matters of public record, and judicially noticeable facts, but nothing else.

Realistic Grant Rates

Despite the elevated Twombly/Iqbal Standard, courts grant complete dismissals in a minority of cases. Federal Judicial Center studies report that 12(b)(6) motions are granted in full in roughly 30 to 40 percent of cases, granted in part in another 15 to 20 percent, and denied outright in the remaining 40 to 55 percent. Grant rates vary substantially by case type: securities fraud and antitrust cases dismiss at higher rates because the heightened pleading standards under the PSLRA and Twombly Apply, while employment discrimination cases survive at higher rates because circumstantial evidence of intent is hard to plead with specificity.

If even one fact in the complaint is genuinely disputed and material to a claim, the court will deny the motion and let discovery proceed. This is why complete dismissals at the pleading stage are uncommon: judges err on the side of letting cases proceed rather than cutting off potentially meritorious claims.

Dismissal With Prejudice vs. Without Prejudice

When a court grants a motion to dismiss, it must also decide whether the dismissal is with or without prejudice. Dismissal with prejudice Ends the case permanently and bars the plaintiff from refiling the same claim. Dismissal without prejudice ends the current case but allows the plaintiff to refile, usually after fixing the defect that caused the dismissal. Most 12(b)(6) dismissals are without prejudice and grant leave to amend, on the rationale that pleading defects are often curable.

Dismissal with prejudice is appropriate when amendment would be futile, when the plaintiff has already been given multiple chances to amend, when the statute of limitations has run, or when the defect is jurisdictional. Plaintiffs whose cases are dismissed without prejudice typically have a defined window (often thirty days) to file an amended complaint or face conversion to dismissal with prejudice.

Strategic Considerations Before Filing

A motion to dismiss is not always the right play. Filing one telegraphs your defenses, gives the plaintiff a roadmap to amend around them, and may force the court to issue a written opinion that becomes precedent or law of the case. Some defendants prefer to answer, raise the same defenses, take limited discovery, and then move for summary judgment under Rule 56 with a fully developed record. The tradeoff is cost: discovery is expensive, and a meritless case might extract settlement value before reaching summary judgment.

The strongest cases for filing a 12(b)(6) motion are: complaints that omit an essential element of every claim, complaints that contain only conclusory allegations without factual support, complaints that affirmatively plead facts establishing an absolute defense (such as a statute of limitations bar visible on the face of the complaint), and complaints whose theory of liability is contrary to controlling law.

Filing in State Court vs. Federal Court

State courts use varying procedural vehicles. California uses a demurrer Rather than a Rule 12(b)(6) motion, with similar standards but different procedural rules around amendment and reply briefs. New York uses CPLR 3211 motions to dismiss, which include grounds beyond the FRCP 12(b) list (such as documentary evidence under 3211(a)(1) and statute of limitations under 3211(a)(5)). Texas allows special exceptions and Rule 91a motions, the latter of which mirrors federal practice. State-court grant rates tend to be lower than federal rates, partly because state pleading standards remain closer to the pre-Twombly Notice-pleading regime.

What Happens After the Court Rules

If the motion is denied, the defendant has fourteen days under Rule 12(a)(4)(A) to file an answer, and the case proceeds to a Rule 26(f) scheduling conference and discovery. If the motion is granted in full with prejudice, the case is over and the defendant is the prevailing party for purposes of any prevailing-party fee provisions. If granted without prejudice, the plaintiff usually receives a deadline to file an amended complaint, and the defendant may file a renewed motion to dismiss if the amendment fails to cure the defect.

Granted-in-part rulings are common: the court may dismiss two of five claims and allow the remaining three to proceed. The defendant must then answer the surviving claims while preserving any waivable defenses (like personal jurisdiction or improper venue) by raising them again in the answer if the court did not address them.

Common Mistakes That Doom Motions to Dismiss

• Attaching exhibits not incorporated in the complaint. This converts the motion to summary judgment, which is rarely the defendant's intent at the pleading stage.
• Arguing factual disputes. The court accepts plaintiff's facts as true. Arguments that "the plaintiff's version is wrong" belong to recap, judgment or trial, not a motion to dismiss.
• Failing to address every claim. If the motion ignores a claim, that claim survives by default.
• Filing after answering. Most 12(b) defenses must be raised before or with the answer. Personal jurisdiction, venue, and service defenses are waived if filed late.
• Boilerplate briefs. Generic recitations of Twombly Without applying the standard to specific allegations rarely persuade a court.

When to Hire an Attorney to Draft the Motion

A motion to dismiss is one of the highest-use filings in civil litigation. A well-drafted 12(b)(6) motion can end a $500,000 lawsuit for the price of a $2,500 to $7,500 brief. A poorly drafted one waives defenses, telegraphs strategy, and produces a written opinion that hardens the case against you. Pro se litigants and small-firm general practitioners file dismissal motions all the time, but the success rate jumps substantially when the brief is written by counsel who specializes in civil litigation and has read the controlling appellate decisions in the relevant jurisdiction.

Legal Tank's attorney-drafted motion to dismiss service Produces a fully briefed motion with citations to the controlling Rule 12(b) standard and recent jurisdiction-specific case law, ready for filing. For lower-stakes cases or pro se litigants who want a strong starting template, the motion to dismiss template Is free to download.

Frequently Asked Questions

Is a motion to dismiss a good thing?

For the defendant, yes, a motion to dismiss is one of the strongest pretrial tools available. After being served with the complaint, a defendant can either file an answer or file a motion to dismiss. The motion is useful because if it is granted, the case is over for the dismissed defendant at a very early stage, before discovery, depositions, or trial expenses. For the plaintiff, a granted motion to dismiss is the worst possible early-stage outcome short of sanctions.

What comes after a motion to dismiss?

If the motion is granted, the plaintiff's case is dismissed and the defendant is no longer required to respond to the complaint. However, the plaintiff may have the opportunity to file an amended complaint to address the deficiencies identified in the motion, particularly if the dismissal was without prejudice. If the motion is denied, the defendant must file an answer within fourteen days and the case proceeds to a Rule 26(f) scheduling conference and discovery.

Are motions to dismiss usually granted?

It is uncommon for courts to grant these motions in their entirety. If there is even one disputed fact that is material to a claim, the court will likely allow the case, or at least part of the case, to proceed. Federal grant rates for 12(b)(6) motions hover around 30 to 40 percent for full dismissals and another 15 to 20 percent for partial dismissals. Securities and antitrust cases dismiss at higher rates because of heightened pleading standards.

What types of motion to dismiss are there?

Federal Rule 12(b) lists seven grounds: (b)(1) lack of subject-matter jurisdiction, (b)(2) lack of personal jurisdiction, (b)(3) improper venue, (b)(4) insufficient process, (b)(5) insufficient service of process, (b)(6) failure to state a claim upon which relief can be granted, and (b)(7) failure to join a party under Rule 19. State courts may also recognize motions on grounds like documentary evidence (NY), statute of limitations (NY), or special exceptions (TX) that go beyond the federal list.