A case gets to the Supreme Court of the United States almost always by petition for a writ of certiorari, a formal request asking the justices to review a decision from a lower court after all other appeals have been exhausted. The Court receives roughly 5,000 to 6,000 of these petitions each year and grants only about 1 to 2 percent, making it one of the most selective courts in the world. To have any chance, a case has to reach the top of its lower-court system, present a legal question the justices consider important, and clear a filing process governed by strict deadlines and formatting rules. At least four justices then have to agree the case is worth their time.
Climbing the Lower Courts First
Nearly every case the Supreme Court hears has already been decided at least twice. There are two pipelines, and each has to be exhausted before the justices will consider stepping in.
The Federal Route
A federal case begins in one of the 94 U.S. District Courts, the trial courts where evidence is presented and a judge or jury decides the outcome.1United States Courts. About U.S. District Courts The losing side can appeal to the appropriate U.S. Court of Appeals. Thirteen of these appellate courts exist: 12 regional circuits and the Federal Circuit, which handles specialized matters like patent cases nationwide.2United States Courts. About the U.S. Courts of Appeals The appeals court reviews the trial record for legal errors without hearing new evidence. For most federal cases, its ruling is the end of the road.
The State Route
A case in the state system starts in a state trial court, works through an intermediate appellate court where one exists, and can eventually reach the state’s highest court. For the Supreme Court to have jurisdiction over a state case, federal law requires the case to involve a challenge to a federal statute or treaty, a claim that a state law violates the U.S. Constitution, or a right claimed under federal law.3GovInfo. 28 U.S.C. 1257 – State Courts; Certiorari The petitioner also has to have exhausted every available appeal within the state system.
One boundary catches many state litigants off guard. Even when a federal issue is present, the Supreme Court will decline review if the state court’s judgment rests on an independent state-law ground that fully supports the outcome on its own. This is the adequate and independent state grounds doctrine. If a state court clearly bases its decision on its own constitution or statutes, and that reasoning alone sustains the result, the federal question becomes beside the point.
Filing a Petition for Certiorari
The formal vehicle for asking the Court to take a case is the petition for a writ of certiorari. The Latin term means roughly “to be more fully informed,” and the petition asks the Court to order the lower court to send up the record. Filing one is a request, not a right. The Court has complete discretion to say no, and it uses that discretion aggressively.
The 90-Day Deadline
The petition has to be filed within 90 days after the lower court enters its judgment. Miss the window, and the case is over regardless of its merits. For good cause, a single justice can extend the deadline by up to 60 additional days, but extensions are not routine and require a real reason.4Legal Information Institute. Rule 13 – Review on Certiorari: Time for Petitioning
Format and Cost
A cert petition is limited to 9,000 words and printed in a specific booklet format with a white cover.5Legal Information Institute. Rule 33 – Document Preparation: Booklet Format; 8 1/2- by 11-Inch Paper Format Filing requires a $300 docket fee and 40 printed copies.6Supreme Court of the United States. Rules of the Supreme Court of the United States (2026) Between the fee, printing, and attorney time, the practical cost runs well into the thousands of dollars for most litigants.
People who cannot afford those costs can file in forma pauperis. Instead of the booklet format and 40 copies, an indigent petitioner can file a single original copy on regular paper with no docket fee. The petitioner submits an affidavit demonstrating financial hardship, though the affidavit is not required if the lower court already appointed counsel.7Legal Information Institute. Rule 39 – Proceedings In Forma Pauperis These petitions make up the Court’s “miscellaneous docket,” which accounts for most petitions filed each year but has a far lower grant rate than paid petitions.
The opposing party has 30 days after the case is docketed to file a brief in opposition explaining why the Court should decline review.8Legal Information Institute. Rule 15 – Briefs in Opposition; Reply Briefs; Supplemental Briefs
How the Justices Pick Cases
The selection process is more ruthless than most people realize. Of the thousands of petitions filed each term, the justices never even discuss the vast majority.
The Discuss List
Before each private conference, the Chief Justice circulates a “discuss list” of petitions considered worth the justices’ time. Any associate justice can add a case. Every petition not placed on the discuss list is automatically denied with no recorded vote or group discussion. This preliminary filter eliminates roughly 97 percent of all petitions before the justices collectively consider a single one.
The Rule of Four
For petitions that make the discuss list, the justices meet in a closed conference with no clerks, staff, or outsiders present. They discuss and vote. The governing principle is the Rule of Four: at least four of the nine justices must vote to hear a case for certiorari to be granted. This longstanding custom lets a minority of the Court compel the full bench to take up a case, preventing a five-justice majority from controlling the docket entirely.
Sometimes a petition is neither granted nor denied but “relisted,” meaning the justices will reconsider it at their next conference. Relisting can signal genuine interest or simply reflect the need for more time.
What a Denial Actually Means
A denial of certiorari is not an endorsement of the lower court’s reasoning. It means only that fewer than four justices thought the case warranted the Court’s attention at that moment. The lower court’s decision stands as a practical matter, but it carries no additional weight as precedent because the Supreme Court passed on it. Arguments that “the Supreme Court effectively agreed with the lower court by denying cert” overstate what happened.
In some situations, instead of full review, the Court issues a GVR order: it grants certiorari, vacates the lower court’s decision, and remands the case for reconsideration. This usually happens when the Court has recently issued a new ruling that might change the outcome, so the case goes back for the lower court to apply the new precedent. A GVR is not a decision on the merits.
What the Court Looks For
The Court’s own rules state that certiorari “is not a matter of right, but of judicial discretion,” and it “will be granted only for compelling reasons.”9Legal Information Institute. Rule 10 – Considerations Governing Review on Writ of Certiorari The justices are not there to correct every wrong answer. They are looking for legal questions that affect the country.
Circuit Splits
The most powerful argument for certiorari is a conflict between federal appeals courts. When two circuits interpret the same federal law differently, people in one part of the country live under a different rule than people in another. The Court’s rules specifically identify this conflict as a reason to grant review, and circuit splits account for a large share of the cases the Court actually takes.9Legal Information Institute. Rule 10 – Considerations Governing Review on Writ of Certiorari The same logic applies when a federal circuit and a state supreme court reach opposite conclusions on the same federal question.
Important Unsettled Federal Questions
The Court also grants review when a lower court has decided a significant federal question the Supreme Court has never addressed. That might involve interpreting a recently enacted statute, applying a constitutional principle to new technology, or resolving a legal issue with broad impact on government operations or individual rights.9Legal Information Institute. Rule 10 – Considerations Governing Review on Writ of Certiorari
Departures From Supreme Court Precedent
When a lower court strikes down a federal statute as unconstitutional or openly departs from established Supreme Court precedent, the justices are more likely to step in. Those cases implicate the Court’s authority directly, and leaving them uncorrected would undermine the uniformity of federal law.
What Almost Never Works
The Court’s rules explicitly note that petitions are “rarely granted when the asserted error consists of erroneous factual findings or the misapplication of a properly stated rule of law.” A petition framed as “the lower court got the facts wrong” almost never succeeds.9Legal Information Institute. Rule 10 – Considerations Governing Review on Writ of Certiorari
The Solicitor General
The Solicitor General, the federal government’s top advocate before the Supreme Court, shapes the docket in a way no private lawyer can. When the government is a party, the SG decides whether to petition for certiorari. In cases where the government is not involved, the Court sometimes asks for the SG’s views before deciding whether to grant review. Research covering multiple terms has found that the Court follows the Solicitor General’s recommendation on certiorari roughly 70 to 80 percent of the time.
After the Court Agrees to Hear a Case
Winning certiorari is the starting line. The case then moves through a structured sequence of briefing, outside input, oral argument, and deliberation that typically stretches several months.
Merits Briefing
Once certiorari is granted, the petitioner has 45 days to file a brief on the merits, a full-length written argument for why the lower court’s decision should be reversed. The respondent then has 30 days after receiving that brief to file its own.10Legal Information Institute. Rule 25 – Briefs on the Merits: Number of Copies and Time to File The petitioner can file a reply brief within 30 more days, though it has to reach the Clerk’s office no later than ten days before oral argument.
Amicus Curiae Briefs
At this stage, outside parties who are not litigants but have a stake in the outcome can file amicus curiae (“friend of the court”) briefs. In high-profile cases the Court can receive dozens of amicus briefs from advocacy groups, trade associations, former government officials, and academics. The Court’s rules state that an amicus brief is welcome when it raises relevant points the parties have not already covered, but one that simply duplicates the parties’ arguments “burdens the Court, and its filing is not favored.”11Supreme Court of the United States. Rules of the Supreme Court of the United States – Rule 37
Oral Argument
Each side gets 30 minutes for oral argument unless the Court directs otherwise, and requests for additional time are rarely granted.12Legal Information Institute. Rule 28 – Oral Argument Only one attorney argues per side unless the Court grants special permission. The argument is less a prepared speech than an extended interrogation, with justices interrupting frequently to test the limits of each side’s position. Arguments are scheduled on select Mondays, Tuesdays, and Wednesdays from the first Monday in October through roughly April.
The Decision
After oral argument, the justices meet in a private conference to take a preliminary vote. The Chief Justice, if in the majority, assigns the writing of the majority opinion; if the Chief Justice is in the minority, the most senior justice in the majority makes the assignment. The opinion circulates internally for weeks or months as justices draft concurrences and dissents and occasionally change their votes. Most decisions are handed down by the end of June, when the term wraps up, with the most contentious cases often arriving last.
A final decision can include a majority opinion, which establishes binding law; concurring opinions from justices who agree with the result but want to add or clarify reasoning; and dissenting opinions from justices who disagree. Occasionally no single opinion commands a majority, producing a plurality opinion in which the narrowest reasoning that five justices can agree on controls.
Emergency Applications and the Shadow Docket
Not every matter follows the slow path of certiorari, briefing, and oral argument. The Court also handles emergency requests on what is commonly called the “shadow docket,” a term covering all non-merits orders the Court issues.13Congress.gov. The Interim Docket or Shadow Docket: Non-Merits Matters at the Supreme Court
Emergency applications typically involve requests to stay a lower court order or block enforcement of a law while litigation continues. These requests are initially directed to the individual justice assigned to the relevant circuit. That circuit justice can act alone or refer the matter to the full Court.14Supreme Court of the United States. A Reporter’s Guide to Applications Pending Before the Supreme Court If a justice denies an application, the applicant can take it to another justice, and in practice renewed applications are usually referred to the full Court.
To win an emergency stay, an applicant generally has to show a reasonable probability that four justices would grant certiorari, a fair chance that a majority would find the lower court wrong, that irreparable harm would result without the stay, and that the balance of harms and public interest favors relief.14Supreme Court of the United States. A Reporter’s Guide to Applications Pending Before the Supreme Court
Shadow docket orders have grown more controversial in recent years because they can have sweeping practical effects while receiving less scrutiny than merits cases. Briefs are shorter, timelines tight, and factual records limited. The Court often resolves these matters through summary orders that state the result without explaining the legal reasoning, and those orders can arrive at any time.13Congress.gov. The Interim Docket or Shadow Docket: Non-Merits Matters at the Supreme Court
The One Path That Skips the Lower Courts
A small number of cases never touch a lower court at all. The Constitution gives the Supreme Court original jurisdiction, meaning authority to hear a case for the first time, in disputes involving ambassadors, foreign diplomats, and cases where a state is a party.15Legal Information Institute. U.S. Constitution Article III The most common modern use of this power is lawsuits between two or more states, which no other court has authority to resolve.
These disputes typically involve boundary lines, water rights, or similar conflicts where one state’s claim directly affects another. When the Court takes an original jurisdiction case, it operates more like a trial court. Because the justices are not set up to conduct trials themselves, the Court usually appoints a special master to gather evidence, hold hearings, and issue a report with recommended findings.16Legal Information Institute. Federal Rules of Civil Procedure Rule 53 The justices then review the report, hear argument from the states, and issue a final decision. Original jurisdiction cases are rare, but they are the one route to the Supreme Court that does not require a prior decision from any lower court.