A writ of certiorari is an order from the U.S. Supreme Court directing a lower court to send up the record of a case so the Justices can review it. The Court uses this writ to control its own docket: of the more than 4,000 petitions filed in the 2022 Term, roughly 60 were granted, an acceptance rate below 2 percent. Understanding how certiorari works means understanding why the Court says no almost every time.
What Certiorari Is and Where It Reaches
The Latin phrase behind the term means “to be more fully informed.” The practical effect is simpler: if the Court issues the writ, it takes the case. If it refuses, the lower court’s decision stands as the final word for the parties.
The Court can issue the writ to two kinds of courts. Federal law lets it review any civil or criminal case from a federal court of appeals, whether before or after that court enters judgment.1Office of the Law Revision Counsel. 28 U.S. Code 1254 – Courts of Appeals; Certiorari; Certified Questions For state cases, the Court may grant certiorari when a state’s highest court has decided a question of federal law.2Office of the Law Revision Counsel. 28 U.S.C. 1257 – State Courts; Certiorari A purely state-law question decided by a state supreme court is beyond the Court’s reach through certiorari.
How Certiorari Differs From an Appeal
In most courts, a losing party has a right to appeal. The appellate court must consider the case. Supreme Court review works the opposite way. Since the Judiciary Act of 1925, Congress has given the Court broad authority to pick which cases it hears, replacing most of the mandatory appellate jurisdiction that had previously flooded its docket.3Federal Judicial Center. Landmark Legislation: The Judges’ Bill The Court functions less as an error-corrector and more as the body that resolves the most important legal conflicts in the federal system.
That orientation shapes everything about certiorari. The Justices are not asking whether a particular litigant was treated fairly below. They are asking whether the legal rule needs fixing for the country.
What Makes the Court Grant Certiorari
Supreme Court Rule 10 lists the main reasons the Court considers a “compelling” basis for review. A serious petition maps its argument to at least one of them.4Legal Information Institute. Rule 10 – Considerations Governing Review on Writ of Certiorari
- A circuit split, meaning two or more federal courts of appeals have reached conflicting conclusions on the same federal question, or a federal court of appeals has disagreed with a state supreme court on an important issue.
- A lower court decision that directly conflicts with existing Supreme Court precedent.
- An important question of federal law that the Supreme Court has never addressed.
- A serious procedural departure by a lower court that calls for the Supreme Court’s supervisory power.
Rule 10 says explicitly that certiorari is “rarely granted” when the only complaint is that the lower court got the facts wrong or misapplied a settled legal rule.4Legal Information Institute. Rule 10 – Considerations Governing Review on Writ of Certiorari Garden-variety mistakes stay with the court that made them.
Circuit Splits in Practice
Circuit splits are the single most reliable path to a grant, because they create an absurd situation: the meaning of federal law depends on where you live. In Nichols v. United States (2016), the Court took up a sex-offender registration question after the circuits divided on whether a person who moved abroad had to update a registration. The Court noted that the outcome for a defendant could turn on which side of a state line the person happened to live on. That kind of geographic lottery in federal rights is exactly what certiorari exists to fix.
What a Denial Means
Most petitions are denied, and denial carries no legal meaning beyond leaving the lower court’s decision intact. The Court is not endorsing the reasoning below. It is declining to spend its limited time on that question. In Carter v. United States (cert denied February 2025), the petitioner asked the Court to reconsider the long-criticized Feres doctrine, which shields the federal government from liability for injuries to military service members. The Court refused, and the doctrine survived untouched. In Consumers’ Research v. Consumer Product Safety Commission (cert denied October 2024), the Court left standing a Fifth Circuit ruling on the structure of an independent federal agency, sidestepping a separation-of-powers question for the time being.
Occasionally a Justice writes a dissent from the denial of certiorari, signaling the issue is ripe and inviting future petitions. These dissents are worth watching, because they sometimes preview where the Court is headed.
How a Certiorari Petition Is Filed
A petition must be filed with the Clerk of the Supreme Court within 90 days after the lower court enters its final judgment. For state cases where the losing party first sought discretionary review from the state’s highest court, the 90-day clock starts when that court denies review.5Legal Information Institute. Rule 13 – Review on Certiorari: Time for Petitioning Miss the deadline and the petition is dead.
The petition itself is a tightly structured document. The Questions Presented come first, framing the exact legal issue in one or two sentences; the Court will consider only what is raised there, so poor framing can sink an otherwise strong case. A jurisdictional statement follows, along with a concise summary of the facts and proceedings below. The core argument appears under the heading “Reasons for Granting the Writ,” where the petitioner shows the case meets a Rule 10 criterion. An appendix must include all opinions and orders from the lower courts. In standard booklet format, the entire petition cannot exceed 9,000 words.6Legal Information Institute. Rule 33 – Document Preparation: Booklet Format; 8 1/2- by 11-Inch Paper Format
Filing requires 40 printed copies in booklet format plus one unbound copy.6Legal Information Institute. Rule 33 – Document Preparation: Booklet Format; 8 1/2- by 11-Inch Paper Format Paper remains the official form of filing, but parties with attorneys must also submit electronically through the Court’s e-filing system.7Supreme Court of the United States. Electronic Filing The docket fee is $300.8Legal Information Institute. Rule 38 – Fees
Filing Without Paying
Petitioners who cannot afford the fee and printing costs can move to proceed in forma pauperis. The motion requires an affidavit or declaration showing financial need. If granted, the petitioner files just the original and 10 copies rather than 40, and the documents can be prepared on standard letter-size paper instead of in booklet format.9Legal Information Institute. Rule 39 – Proceedings In Forma Pauperis An incarcerated person without an attorney need file only the original. In forma pauperis filings make up the majority of petitions the Court receives, though they are granted at far lower rates than paid petitions.
Stopping a Lower Court Judgment While You Wait
Filing a cert petition does not pause the lower court’s judgment. If a petitioner needs enforcement halted while the Court considers the petition, they must separately apply for a stay from an individual Justice. The application must explain why a stay is justified and must show the petitioner already sought a stay from the courts below and was denied.10Legal Information Institute. Rule 23 – Stays Without that showing, the Court will not entertain the application except in extraordinary circumstances.
Opposition and Amicus Support
Once a petition is docketed, the other side has 30 days to file a brief in opposition, or it can file a waiver that speeds the petition to the Justices’ desks.11Legal Information Institute. Rule 15 – Briefs in Opposition; Reply Briefs; Supplemental Briefs The petitioner may then file a reply addressing new points.
Outside parties can file amicus curiae briefs urging a grant or denial. A brief supporting the petitioner is due within 30 days after the case is docketed or after the Court calls for a response, whichever is later. A brief supporting the respondent is due within the time allowed for the opposition brief.12Supreme Court of the United States. Rules of the Supreme Court of the United States – Rule 37 Government actors such as the U.S. Solicitor General, state attorneys general, and authorized agency representatives can file without anyone’s permission. Research consistently shows that petitions attracting amicus attention are more likely to be granted, whether those briefs support or oppose review.
How the Justices Decide
With thousands of petitions a term, no Justice reads each one. Most Justices participate in the cert pool, where incoming petitions are divided among participating Justices’ law clerks. A single clerk reads the petition, the opposition, and any amicus filings, then writes a pool memo summarizing the case and recommending grant or deny. The memo circulates to all participating chambers, where each Justice’s own clerks may flag disagreements.
The Chief Justice compiles a “discuss list” of petitions that at least one Justice wants to talk about in conference. Any petition not placed on the discuss list is denied automatically. At the private conference, the Justices vote under the longstanding Rule of Four: if at least four of the nine vote to hear a case, certiorari is granted. The threshold is lower than a majority, so a determined minority can place a case on the docket over the objections of five colleagues.
After the Court Grants or Denies
A grant changes the case. Both sides shift from arguing whether the Court should hear it to arguing who should win. The petitioner files a brief on the merits within 45 days of the order granting certiorari, and the respondent has 30 days after that to file its own.13Legal Information Institute. Rule 25 – Briefs on the Merits: Number of Copies and Time to File High-profile cases attract dozens of merits-stage amicus briefs from agencies, trade groups, academics, and advocacy organizations. Oral argument follows, typically with 30 minutes per side.14Legal Information Institute. Rule 28 – Oral Argument Opinions are usually released by late June or early July, when the Court recesses for summer.15United States Courts. Supreme Court Procedures
A denial leaves the lower court’s judgment as the final resolution between the parties, but it establishes no legal rule. Other litigants with similar issues are free to petition again, and the legal question remains open.
Asking the Court to Reconsider
A petitioner whose case is denied can file a petition for rehearing, but the window is tight and the grounds are narrow. The petition must be filed within 25 days of the denial order, and that deadline cannot be extended. The petitioner can only raise intervening developments of substantial importance or significant grounds not presented in the original petition. Counsel must certify that the petition is filed in good faith and not for delay.16Legal Information Institute. Rule 44 – Rehearing No oral argument is permitted. The rehearing fee is $200.8Legal Information Institute. Rule 38 – Fees
Special Paths to the Court
In rare cases, the Court can grant certiorari to review a case still pending in a federal court of appeals, before that court has issued a decision. This shortcut is reserved for matters of “imperative public importance” that justify skipping the normal appellate process entirely.17Legal Information Institute. Rule 11 – Certiorari to a United States Court of Appeals Before Judgment The standard is deliberately steep, and the path remains one of the rarest forms of Supreme Court review.
A narrow category of cases reaches the Court without certiorari at all. When a three-judge district court panel grants or denies an injunction in a case Congress has required to be heard by such a panel, any party may appeal directly to the Supreme Court as of right.18Office of the Law Revision Counsel. 28 U.S. Code 1253 – Direct Appeals From Decisions of Three-Judge Courts These mandatory appeals typically involve challenges to legislative redistricting plans and certain other matters Congress has flagged for expedited review. The Court has no discretion to refuse them, though in practice they are a tiny fraction of the docket.