What Is a Motion to Dismiss?
A motion to dismiss under Federal Rule of Civil Procedure 12(b)(6) asks the court to throw out your complaint because it fails to state a claim upon which relief can be granted — even if everything you alleged is true. It is one of the most common early attacks on a pro se complaint, and one of the most important motions to respond to correctly.
Other common grounds for dismissal under Rule 12(b) include:
- Rule 12(b)(1): Lack of subject matter jurisdiction
- Rule 12(b)(2): Lack of personal jurisdiction over the defendant
- Rule 12(b)(4)/(5): Insufficient process or service of process
- Rule 12(b)(6): Failure to state a claim
This guide focuses on Rule 12(b)(6) — the most frequently used ground — but the response strategy applies broadly.
The Legal Standard: Twombly and Iqbal
To survive a Rule 12(b)(6) motion, your complaint must allege facts that are "plausible on their face." This standard comes from two landmark Supreme Court decisions:
- Bell Atlantic Corp. v. Twombly, 550 U.S. 544 (2007): Replaced the old "no set of facts" standard with the plausibility requirement
- Ashcroft v. Iqbal, 556 U.S. 662 (2009): Applied Twombly to all civil cases and established a two-step analysis
Under the Iqbal two-step analysis, courts: (1) identify and disregard conclusory allegations that are not entitled to the presumption of truth, then (2) determine whether the remaining factual allegations plausibly suggest an entitlement to relief.
Importantly, on a Rule 12(b)(6) motion, the court must accept all well-pleaded factual allegations as true and draw all reasonable inferences in your favor. Ashcroft v. Iqbal, 556 U.S. at 678.
Step 1: Read the Motion Carefully
Before writing a single word of your response, read the defendant's motion carefully and identify every argument they are making. Common arguments in motions to dismiss include:
- Your complaint is too vague or conclusory (fails Iqbal/Twombly)
- You have not alleged all elements of your cause of action
- Your claim is barred by the statute of limitations
- The defendant has immunity (qualified immunity, sovereign immunity, etc.)
- You lack standing to bring this claim
- The court lacks subject matter or personal jurisdiction
For each argument, you need a specific counter-argument supported by the facts in your complaint and applicable law.
Step 2: Check Your Local Rules for the Deadline
Under FRCP Rule 12, you typically have 21 days to respond to a motion to dismiss after service. However, many district courts have local rules that modify this deadline — some give you 14 days, others 28 days. Check your court's local rules immediately. Missing the response deadline can result in the motion being granted as unopposed.
Step 3: Structure Your Response
A well-organized opposition to a motion to dismiss typically includes:
- Introduction: A brief statement of why the motion should be denied
- Legal Standard: Recite the Rule 12(b)(6) standard, including the obligation to accept your allegations as true
- Argument: Address each of the defendant's arguments in turn, explaining why your complaint survives
- Request for Leave to Amend: If there are any weaknesses in your complaint, request leave to amend under FRCP Rule 15(a) if the motion is granted
- Conclusion: A clear request that the court deny the motion
Step 4: Address Each Argument with Specific Facts and Law
The most common mistake pro se litigants make in responding to a motion to dismiss is writing a general narrative about why they believe they were wronged. That is not what the court needs. The court needs to know:
- Which specific paragraphs of your complaint allege each element of your claim
- Which legal authority supports your theory of liability
- Why the defendant's legal arguments are wrong
For example, if the defendant argues your § 1983 claim fails because you did not allege a constitutional violation, point to the specific paragraphs where you alleged the violation, cite the constitutional provision, and cite cases that support your theory.
Step 5: Always Request Leave to Amend
Under FRCP Rule 15(a)(2), courts should "freely give leave [to amend] when justice so requires." Even if the court finds deficiencies in your complaint, you are generally entitled to at least one opportunity to correct them. Always include a sentence at the end of your opposition requesting leave to file an amended complaint if the court grants the motion.
Key Cases to Know
- Bell Atlantic Corp. v. Twombly, 550 U.S. 544 (2007) — plausibility standard
- Ashcroft v. Iqbal, 556 U.S. 662 (2009) — two-step analysis, accept facts as true
- Haines v. Kerner, 404 U.S. 519 (1972) — liberal construction of pro se pleadings
- Erickson v. Pardus, 551 U.S. 89 (2007) — reaffirming liberal construction post-Twombly
The Bottom Line
A motion to dismiss is not the end of your case — it is an opportunity to demonstrate that your complaint is legally sufficient. Respond specifically to each argument, cite the legal standard, point to your factual allegations, and always request leave to amend. The Pro Se Course covers motion practice in depth, including how to draft opposition briefs, reply briefs, and how to prepare for oral argument on motions.