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Motion to Dismiss vs. Summary Judgment

The Legal Storyboard · Updated 2026-09-05 · 7 min read
Motion to Dismiss vs. Summary Judgment
AbstractIn U.S. federal civil practice, a Rule 12 motion to dismiss often tests whether a complaint can proceed as pleaded or raises a threshold defense. A Rule 56 summary-judgment motion tests whether the evidentiary record leaves a genuine dispute of material fact for trial and whether the movant is entitled to judgment as a matter of law. State and local procedures differ; actual motions need prompt review by a licensed lawyer in the relevant jurisdiction.
Contents

The core difference

In U.S. federal civil practice, a motion to dismiss under Rule 12 often tests whether the complaint can proceed as pleaded or raises another threshold defense. A motion for summary judgment under Rule 56 tests whether the record shows a genuine dispute of material fact requiring trial and whether the moving party is entitled to judgment as a matter of law. The first is commonly an early pleadings-stage motion; the second commonly relies on evidence developed through discovery.

Those are general federal distinctions. State courts, specialized courts and individual federal districts may use different rules, labels, standards and procedures. A motion in an actual case can affect rights immediately. Take the motion, docket, court orders and all stated response dates promptly to a licensed attorney in the relevant jurisdiction.

What does a motion to dismiss ask the court to decide?

“Motion to dismiss” is a broad label. Rule 12(b) of the Federal Rules of Civil Procedure lists seven defenses that may be raised by motion:

  1. lack of subject-matter jurisdiction
  2. lack of personal jurisdiction
  3. improper venue
  4. insufficient process
  5. insufficient service of process
  6. failure to state a claim upon which relief can be granted
  7. failure to join a required party under Rule 19

These grounds do not all ask the same question. A jurisdiction motion asks whether the court has authority over the subject or party. A service motion challenges how legal papers were delivered. A Rule 12(b)(6) motion, the form most often meant in a comparison with summary judgment, challenges the legal sufficiency of a claim as pleaded.

A Rule 12(b)(6) motion is not ordinarily a trial on whose factual story is more persuasive. The governing pleading standard comes from the federal rules and binding case law, and the materials a court may consider can depend on the claim and circuit. It is therefore too simple to say the judge “assumes everything in the complaint is true.” Courts distinguish factual allegations from legal conclusions and apply controlling law to the pleading.

The plaintiff may have an opportunity to amend, or the court may dismiss a claim with or without permission to try again. That result depends on the ground, the order, governing law and procedural history. “Dismissed” alone does not tell you whether the dispute is permanently over.

What does summary judgment ask the court to decide?

Rule 56 states that a court shall grant summary judgment when the moving party shows no genuine dispute as to any material fact and entitlement to judgment as a matter of law. A material fact is one that matters to the result under the substantive law. A dispute is genuine when the evidence permits the issue to be resolved by a factfinder rather than as a matter of law.

Summary judgment can address an entire case, one claim, one defense or part of a claim or defense. Either a plaintiff or defendant may move under Rule 56. A complete grant can eliminate the need for a trial; a partial grant can narrow what remains for trial.

Unlike a typical pleadings-stage dismissal motion, summary judgment uses materials in the case record. Rule 56 identifies depositions, documents, electronically stored information, affidavits or declarations, stipulations, admissions and interrogatory answers among the materials that may support or dispute factual positions.

That does not mean the judge conducts a paper trial and chooses which witness is more believable. The question is whether a trial is needed to resolve a material factual dispute, applying the governing standard and viewing the record as controlling law requires.

How do the two motions compare?

Question Motion to dismiss, commonly Rule 12(b)(6) Summary judgment under Rule 56
Usual stage Early, directed to a pleading Often after some or all discovery
Main focus Whether the claim can proceed as pleaded Whether the evidentiary record leaves a genuine dispute of material fact
Typical materials Complaint and materials the court may properly consider at that stage Cited record materials such as documents, testimony, admissions and declarations
Who commonly moves A defendant, although “dismissal” can arise through other rules and routes Plaintiff or defendant
Possible scope One or more claims, parties or the action Whole case, claim, defense or part of one
What denial means The challenged claim survives that motion The challenged issue remains unresolved by summary judgment

The table is a map, not a filing guide. Jurisdictional motions can involve evidence outside the complaint. Some matters treated as part of the pleading can be considered without conversion under applicable doctrine. Local rules can require specific statements, notices or formats. The motion's title does not decide the court's analysis.

When can a dismissal motion become summary judgment?

Federal Rule 12(d) supplies an important bridge. If matters outside the pleadings are presented on a Rule 12(b)(6) or Rule 12(c) motion and the court does not exclude them, the motion must be treated as one for summary judgment under Rule 56. All parties must receive a reasonable opportunity to present material pertinent to the converted motion.

Conversion matters because a Rule 56 motion calls for a record-based response. A party may need to cite admissible evidence, identify a genuine dispute or explain why essential facts are not yet available. Rule 56(d) authorizes specified responses when a nonmoving party shows by affidavit or declaration that it cannot yet present facts essential to its opposition.

Whether a particular exhibit is “outside the pleadings,” whether the court will exclude it and what notice is sufficient depend on governing law and the case. Do not infer conversion—or its absence—from the fact that documents were attached. A licensed attorney in the relevant jurisdiction should review the motion and docket promptly.

Does either motion decide the burden of proof at trial?

Not in the same way as a verdict after trial. The burden of proof in civil and criminal cases explains the distinction between standards such as preponderance of the evidence and proof beyond a reasonable doubt.

A Rule 12(b)(6) motion asks whether the pleaded claim clears the applicable legal threshold; it does not ordinarily decide whether the plaintiff has proved that claim at trial. At summary judgment, however, the substantive law and the allocation of the trial burden help determine which facts are material and what showing the parties must make on the record.

That is why “there is some disagreement” does not automatically defeat summary judgment. The dispute must concern a fact that could affect the legal outcome, and it must be supported in the form Rule 56 and the applicable court rules require.

What happens when a motion is granted or denied?

The order controls. Possible results include:

A denial is not a finding that the opposing party will win at trial. It means the movant did not obtain the requested ruling on that motion under the applicable standard. A grant can also leave other claims, remedies or parties in the case.

Terms such as with prejudice, without prejudice, final judgment and interlocutory order have consequences for amendment and appeal that cannot be inferred safely from a headline or docket label. The wording of the order, the claims resolved and governing appellate rules matter.

Why do local rules and court orders matter?

The national Federal Rules are only part of federal motion practice. District courts publish local rules, individual judges may issue standing orders, and a case has its own scheduling orders. These can govern formatting, record citations, conferences, page limits, filing method and response procedure.

Do not rely on a deadline quoted in a general article. The controlling time may come from a national rule, local rule, judge's order, docket entry or service event, and the calculation can depend on facts not visible in the motion itself. Missing a response or failing to address a properly supported factual assertion can have serious consequences. Rule 56 lists several actions a court may take when a party fails to support or address a fact properly, including treating the fact as undisputed for the motion.

For any received motion, preserve the papers and attachments, check the official docket, and promptly consult a licensed attorney who practices in that jurisdiction. Court clerk staff can provide procedural information but do not act as a party's lawyer.

Where do settlement and other dispute processes fit?

Motion practice and settlement can proceed on related tracks. A pending motion does not automatically create an agreement, and negotiation does not automatically pause a court obligation. Only a court order, controlling rule or valid agreement with the required effect can change what a party must do.

Mediation and arbitration are also different from a court's decision on a Rule 12 or Rule 56 motion. A mediator does not rule on the motion. An arbitrator operates under the arbitration agreement, governing law and applicable arbitral rules, not automatically under the Federal Rules of Civil Procedure.

For more process definitions, browse Court Basics. General education can clarify the vocabulary; it cannot determine what response is due or what argument fits a specific record.

Sources

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FAQ

Is a motion to dismiss the same as summary judgment?

No. A typical Rule 12(b)(6) motion focuses on whether a claim can proceed as pleaded. Rule 56 summary judgment uses the record to ask whether a genuine dispute of material fact requires trial and whether the movant is entitled to judgment as a matter of law.

Can a motion to dismiss use evidence?

The answer depends on the dismissal ground and materials. Under federal Rule 12(d), a Rule 12(b)(6) or 12(c) motion must be treated as summary judgment if outside matters are presented and not excluded, with a reasonable opportunity for the parties to respond.

Can summary judgment decide only part of a case?

Yes. Federal Rule 56 permits a motion directed to a claim, defense or part of one. A partial ruling can narrow the issues or facts remaining without ending the entire action.

Does denial of a motion to dismiss mean the plaintiff wins?

No. It means the movant did not obtain dismissal under the standard applied to that motion. The claim may continue through discovery, later motions, settlement or trial, and no final merits result follows from denial alone.

Does denial of summary judgment guarantee a trial?

No. It means the requested summary ruling was not granted in that form. Other claims or motions may remain, the parties may settle, and later orders may change the issues. The court's order determines what remains.

How long do I have to respond to either motion?

There is no safe universal answer. The controlling time may come from national and local rules, a judge's order, the docket and service facts. Take the motion and all stated dates promptly to a licensed attorney in the relevant jurisdiction.