Common Federal Court Motions and Their Purposes

Federal court motions are formal written requests asking a judge to take a specific action in a pending case. They appear at every stage of litigation — before trial, during trial, and after judgment — and their strategic use can determine whether a case proceeds, settles, or terminates early. The Federal Rules of Civil Procedure (Fed. R. Civ. P.) and the Federal Rules of Criminal Procedure (Fed. R. Crim. P.) govern how motions are filed, opposed, and decided in U.S. district courts. Understanding these mechanisms is essential background for anyone navigating the federal civil procedure overview or tracking how federal litigation unfolds from filing through appeal.

Definition and scope

A motion is a procedural device by which a party formally requests a court ruling on a defined legal question. In federal practice, motions are governed at the threshold level by Fed. R. Civ. P. 7(b), which requires that a motion state the grounds for relief and the order sought, and that it be made in writing unless it is raised during a hearing or trial. Local district court rules — which all 94 U.S. district courts publish — layer additional requirements on top of the federal rules, including page limits, briefing schedules, and formatting standards.

Motions fall into two broad categories: dispositive and non-dispositive. Dispositive motions, if granted, can resolve all or part of a case without trial. Non-dispositive motions address procedural or evidentiary matters without resolving the underlying dispute on the merits. This distinction matters because, under 28 U.S.C. § 636(b)(1), federal magistrate judges may rule on non-dispositive motions outright but may only issue recommendations on dispositive motions, which a district judge must then review. The federal magistrate judges page covers that referral framework in detail.

How it works

When a party files a motion, the opposing party generally has a set period — typically 14 to 21 days under local rules or court order — to file a written opposition. The moving party may then file a reply. The judge may rule on the written submissions alone or schedule oral argument. Some district courts resolve the majority of motions without oral argument; the Southern District of New York, for example, issues standing orders specifying which motion categories receive argument by default.

The procedural sequence for a contested dispositive motion typically runs as follows:

1. Moving party files the motion with supporting brief and exhibits.
2. Non-moving party files an opposition brief within the deadline set by local rule or court order.
3. Moving party may file a reply brief, typically within 7 to 14 days.
4. Court may schedule oral argument or take the motion under submission on the papers.
5. Judge issues a written opinion and order granting, denying, or partially granting the motion.
6. Losing party may seek interlocutory appeal (where permitted) or preserve the issue for appeal after final judgment.

Common scenarios

The motions encountered most frequently in federal litigation include the following.

Motion to Dismiss (Fed. R. Civ. P. 12(b)) — A defendant may move to dismiss on grounds including lack of subject-matter jurisdiction (Rule 12(b)(1)), lack of personal jurisdiction (Rule 12(b)(2)), or failure to state a claim upon which relief can be granted (Rule 12(b)(6)). The Rule 12(b)(6) motion is the workhorse of early federal civil litigation; under the standard articulated by the U.S. Supreme Court in Bell Atlantic Corp. v. Twombly, 550 U.S. 544 (2007), a complaint must allege facts sufficient to state a claim that is "plausible on its face."

Motion for Summary Judgment (Fed. R. Civ. P. 56) — Either party may move for summary judgment after the close of discovery, arguing that no genuine dispute of material fact exists and the movant is entitled to judgment as a matter of law. This is the most consequential non-trial mechanism for terminating civil litigation; the Federal Judicial Center has documented that summary judgment disposes of a substantial share of civil cases before they reach trial.

Motion in Limine — Filed before trial begins, this motion asks the court to exclude specific evidence or argument from trial. It is governed by the Federal Rules of Evidence rather than the Federal Rules of Civil Procedure and is the primary tool for shaping what a jury hears.

Motion to Suppress (Fed. R. Crim. P. 12(b)(3)(C)) — In federal criminal cases, a defendant may move to suppress evidence obtained in violation of the Fourth Amendment. If granted, the government loses use of the suppressed evidence at trial, which can be dispositive in prosecutions built on physical or digital evidence.

Motion for Judgment as a Matter of Law (Fed. R. Civ. P. 50) — Formerly called a directed verdict, this motion is raised during or after trial when the moving party argues that a reasonable jury could not find for the opposing side on the evidence presented. A post-verdict version is the Renewed Motion for Judgment as a Matter of Law under Rule 50(b).

Motion for New Trial (Fed. R. Civ. P. 59) — Filed within 28 days of judgment, this motion asks the court to set aside the verdict due to prejudicial error, newly discovered evidence, or a verdict that is against the great weight of the evidence.

Decision boundaries

Not all motions are treated equally. Courts apply different legal standards depending on the motion type, and those standards determine how difficult it is to win.

• A Rule 12(b)(6) motion is evaluated on the face of the complaint, with all well-pleaded facts accepted as true and all reasonable inferences drawn in the plaintiff's favor.
• A summary judgment motion requires the court to view evidence in the light most favorable to the non-moving party; the movant bears the initial burden of demonstrating the absence of a genuine dispute.
• A motion to suppress requires the defendant to establish a Fourth Amendment violation by a preponderance of the evidence in most circuits, at which point the burden may shift to the government.
• A motion in limine is evaluated under the Federal Rules of Evidence — primarily relevance (Fed. R. Evid. 401–403) — and the trial court has broad discretion.

The contrast between 12(b)(6) and summary judgment is particularly important: a 12(b)(6) dismissal is decided on pleadings alone and occurs before discovery, while summary judgment is decided on evidence developed through federal court discovery and occurs after the factual record is built. A case that survives a motion to dismiss may still be terminated at summary judgment if discovery fails to produce evidence supporting the plaintiff's claims.

Appeals from dispositive rulings — including denials of qualified immunity, which constitute one of the few immediately appealable interlocutory orders — proceed through the U.S. Courts of Appeals under the framework described on the federal appeals process page. The threshold rules governing which courts have authority to hear specific disputes are explained in the federal court jurisdiction explained and subject-matter jurisdiction pages. For a broader orientation to the federal judiciary's structure, the home page provides a starting framework for all topic areas covered across the site.