To file an interlocutory appeal in federal court, you first identify which of four pathways fits the district court order you want reviewed, then file either a notice of appeal with the district court clerk or a petition for permission with the court of appeals, within a deadline that can be as short as 10 days. Federal courts strongly prefer to hear appeals only after final judgment, so mid-case review is available only through narrow routes, each with its own requirements.
Which Pathway Fits Your Order
The pathway determines your deadline, what you file, and where you file it. Pick wrong and you can lose the appeal on procedure alone.
Injunctions and Receiverships
Under 28 U.S.C. § 1292(a), you can appeal as of right when a district court grants, denies, modifies, or dissolves an injunction, or when it appoints a receiver or refuses to end a receivership.1Office of the Law Revision Counsel. 28 U.S. Code 1292 – Interlocutory Decisions No certification from the district court is required. You file a notice of appeal and the court of appeals must hear it.
Certified Questions Under Section 1292(b)
When the order does not involve an injunction or receivership, you can still seek interlocutory review if the district judge certifies in writing that the order involves a controlling question of law where there is substantial ground for difference of opinion and where an immediate appeal could materially advance the ultimate termination of the litigation.1Office of the Law Revision Counsel. 28 U.S. Code 1292 – Interlocutory Decisions Even after certification, the court of appeals has discretion to refuse the appeal. The statute says the appellate court “may” permit it, not that it must.
The Collateral Order Doctrine
Some orders count as effectively final even though the underlying case continues. Under the collateral order doctrine, you can appeal without certification if the order conclusively decides an issue, the issue is completely separate from the merits, and it would be impossible to obtain meaningful review after final judgment. Courts read these requirements narrowly. Classic examples include orders denying qualified immunity to a government official or refusing to enforce an arbitration agreement.
Rule 54(b) Certification
In cases with multiple claims or multiple parties, the district court can enter a final judgment on one or more claims while the rest of the case continues. Rule 54(b) of the Federal Rules of Civil Procedure allows this only if the court expressly finds there is no just reason for delay.2Legal Information Institute. Federal Rules of Civil Procedure Rule 54 – Judgment; Costs Once that partial final judgment is entered, you appeal it the same way you would appeal any final judgment.
The Deadline You’re Working Against
Deadlines here are short and unforgiving. Miss them and the right to appeal is almost certainly gone.
- Section 1292(b) certified questions: file a petition for permission to appeal in the court of appeals within 10 days after the district court enters the order containing the certification. That is 10 calendar days.1Office of the Law Revision Counsel. 28 U.S. Code 1292 – Interlocutory Decisions
- Injunction orders and Rule 54(b) judgments: file a notice of appeal with the district court clerk within 30 days after entry of the order or judgment.3Legal Information Institute. Federal Rules of Appellate Procedure Rule 4
- Collateral order appeals: same 30-day window as other appeals of right.
The 10-day window trips people up. If you are asking the district court to certify an order under § 1292(b), have your appellate petition substantially drafted before the certification comes through.
What You File and Where
What you actually file depends on the pathway.
Petition for Permission to Appeal (Section 1292(b))
A petition under Federal Rule of Appellate Procedure 5 goes directly to the clerk of the court of appeals. It must contain the facts needed to understand the question, the legal question itself, the relief sought, and the reasons the appeal should be allowed. Attach the district court’s order, any accompanying opinion or memorandum, and the order containing the certification.4Legal Information Institute. Federal Rules of Appellate Procedure Rule 5 – Appeal by Permission
The petition cannot exceed 5,200 words if prepared on a computer, or 20 pages if handwritten or typewritten.4Legal Information Institute. Federal Rules of Appellate Procedure Rule 5 – Appeal by Permission This is a persuasion document. You are asking the court of appeals to use its discretion in your favor, so the petition needs to explain why the legal question matters enough to justify interrupting the district court proceedings.
Notice of Appeal (Injunctions, Collateral Orders, Rule 54(b))
For appeals that do not require the appellate court’s permission, you file a notice of appeal with the clerk of the district court that issued the order. The notice identifies the order being appealed, the court to which the appeal is directed, and the parties taking the appeal.
Corporate Disclosure Statement
Any nongovernmental corporate party must file a disclosure statement identifying any parent corporation and any publicly held corporation owning 10% or more of its stock. File it with the first document you submit to the court of appeals, and place it before the table of contents in the principal brief.5Legal Information Institute. Federal Rules of Appellate Procedure Rule 26.1 – Corporate Disclosure Statement
Fees, Service, and Bond
Both types of filings are submitted electronically through the federal courts’ CM/ECF system.6United States Courts. Electronic Filing (CM/ECF) The filing fee for docketing a case in a federal court of appeals is $600.7United States Courts. Court of Appeals Miscellaneous Fee Schedule If you cannot afford the fee, file a motion to proceed in forma pauperis in the district court with an affidavit showing your inability to pay, a statement that the appeal has merit, and the issues you intend to raise.8Legal Information Institute. Federal Rules of Appellate Procedure Rule 24 – Proceeding in Forma Pauperis
After filing, serve the notice or petition on all other parties. The district court may also require you to post a bond to secure costs on appeal. There is no fixed amount; the court sets the bond based on likely actual costs.9Legal Information Institute. Federal Rules of Appellate Procedure Rule 7 – Bond for Costs on Appeal in a Civil Case
Does the District Court Case Pause?
Filing a § 1292(b) petition does not automatically stop proceedings below. The statute is explicit: the appeal “shall not stay proceedings in the district court unless the district judge or the Court of Appeals or a judge thereof shall so order.”1Office of the Law Revision Counsel. 28 U.S. Code 1292 – Interlocutory Decisions Unless you obtain a stay order, discovery, motion practice, and trial preparation continue while the appellate court considers your petition.
To get a stay, you ordinarily first ask the district court under Federal Rule of Appellate Procedure 8. If the district court denies the stay or if approaching the district court is impracticable, move for a stay in the court of appeals. That motion must explain why a stay is warranted and include relevant portions of the record.10Legal Information Institute. Federal Rules of Appellate Procedure Rule 8 – Stay or Injunction Pending Appeal
Appeals from injunction orders under § 1292(a) work differently. Because those are appeals as of right, they can divest the district court of jurisdiction over the issues on appeal, though the district court keeps authority over matters not directly affected by the appealed order.
What Happens After You File
For a § 1292(b) petition, the opposing party has 10 days after service to file an answer opposing the petition or a cross-petition.4Legal Information Institute. Federal Rules of Appellate Procedure Rule 5 – Appeal by Permission The court of appeals then decides whether to grant permission. If it denies the petition, the case returns to the district court with no appellate review of the order.
If the appeal moves forward, the court of appeals sets a briefing schedule. The appellant files an opening brief, the appellee responds, and the appellant may file a reply. The appellant also prepares an appendix containing the relevant docket entries, the order being appealed, key portions of the pleadings, and any other parts of the record the parties want the court to review.11Legal Information Institute. Federal Rules of Appellate Procedure Rule 30 – Appendix to the Briefs
The court may schedule oral argument, particularly for novel or complex legal questions, though many interlocutory appeals are resolved on the briefs alone. The court then issues a written opinion or order that affirms, reverses, or modifies the district court’s ruling, and that decision guides the remaining proceedings below.
Sanctions for Frivolous Appeals
Filing an interlocutory appeal as a delay tactic or without a reasonable legal basis carries real financial risk. Under Federal Rule of Appellate Procedure 38, the court of appeals can award damages to the opposing party, including attorney’s fees and costs, and can impose single or double costs as a penalty if it determines the appeal is frivolous.12Legal Information Institute. Federal Rules of Appellate Procedure Rule 38 – Frivolous Appeal; Damages and Costs The court must give the appellant notice and a reasonable opportunity to respond before imposing sanctions. Appellate judges have little patience for appeals designed to slow litigation rather than resolve a genuine dispute.
When Mandamus Might Be an Option
If none of the four pathways fit your situation, one further avenue exists: a petition for a writ of mandamus. Under the All Writs Act, federal courts of appeals can issue writs “necessary or appropriate in aid of their respective jurisdictions.”13Office of the Law Revision Counsel. 28 U.S. Code 1651 – Writs A mandamus petition asks the appellate court to order the district court to take or stop a specific action.
Mandamus is an extraordinary remedy, not a substitute for a regular appeal. To succeed, you must show that your right to relief is clear and undeniable, that you have no other adequate way to get it, and that the district court’s error is so serious that it amounts to a usurpation of judicial power or a clear abuse of discretion. Courts grant mandamus rarely, and only when waiting until after a final judgment would cause harm that cannot be undone.