A court opinion is a judge’s written explanation of why a case was decided the way it was: the facts, the legal question, the reasoning, and the result. The part that carries legal weight is narrower than most people assume. Only the holding of a majority opinion binds future courts. Everything else — concurrences, dissents, hypothetical examples, commentary — is either persuasive at best or has no force at all.
Understanding which parts of an opinion matter, and which are commentary, is what separates reading a case from relying on one.
The Types of Opinions a Case Can Produce
Most published opinions come from appellate courts, where several judges hear a case together. That setup produces different kinds of writing from the bench.
A majority opinion represents the view of more than half the judges on the panel. It becomes binding law within that court’s jurisdiction. When lawyers refer to “the opinion” in a case, they almost always mean this one. Every lower court has to follow its reasoning when similar facts arise.
A concurring opinion comes from a judge who agrees with the outcome but not the reasoning. Maybe the majority relied on a constitutional argument and the concurring judge thinks a statutory reading reaches the same place more simply. Concurrences do not create binding law, but they can flag where a court might go in a future case, especially when they expose a weakness in the majority’s logic.
A dissenting opinion is written by a judge who disagrees with the result. Dissents have no legal force when issued. Over time, some of the most consequential shifts in American law began as dissents that a later court eventually adopted.
A per curiam opinion is issued by the court collectively, with no individual author named. These are often short and apply settled law, though notable exceptions exist. Bush v. Gore was technically per curiam.
Plurality Opinions
Sometimes a majority of judges agree on who wins but not on why. The opinion that attracts the most votes without reaching a true majority is a plurality. Because no single rationale commands majority support, the precedential value gets complicated. The Supreme Court addressed this in Marks v. United States, holding that when no majority rationale exists, the binding rule is “that position taken by those Members who concurred in the judgments on the narrowest grounds.”1United States Courts. Glossary – US v Alvarez Lower courts frequently struggle to work out what the “narrowest grounds” actually require, which is why plurality decisions generate more confusion than clean majorities.
Published vs. Unpublished Opinions
Not every decision gets formally published, and the difference affects whether the opinion sets precedent.
All Supreme Court decisions are published. At the intermediate appellate level, both federal and state courts choose which opinions to publish based on internal rules. An opinion typically earns publication when it establishes a new legal rule, resolves a conflict between lower courts, or addresses a question of first impression. Routine cases applying settled law often produce unpublished opinions.
An unpublished opinion still resolves the dispute between the parties, but it does not create mandatory precedent. You can spot one by the notice at the top: “not for publication” or “non-precedential.” Under the federal rules, courts cannot prohibit parties from citing unpublished opinions issued on or after January 1, 2007, but the weight those citations carry is limited.2Legal Information Institute. Federal Rules of Appellate Procedure Rule 32.1 – Citing Judicial Dispositions Treat unpublished opinions as persuasive at best. A court might find the reasoning helpful; nobody is obligated to follow it.
What the Different Parts of an Opinion Do
Opinions follow a predictable structure, which makes them easier to navigate once you know what you are looking at.
The caption sits at the top and identifies the parties, the court, the docket number, and the date. Researchers and clerks use it to track and locate the filing.
In Supreme Court cases, a syllabus appears next: a short summary of the facts and conclusions. First-time readers rely on it heavily, but it is not written by the justices. The Reporter of Decisions prepares it for convenience, and it is not part of the official opinion. If the syllabus and the opinion text conflict, the opinion controls.
The statement of facts lays out what happened: the events behind the lawsuit, the path the case took through lower courts, and how it landed in front of this court. The legal analysis only makes sense in light of these specific facts, so read this section carefully.
The analysis, sometimes called the discussion, is where the court does its work. Judges examine the relevant statutes and prior rulings, weigh the arguments, and explain step by step how they reached the result. This is usually the longest and densest part of the opinion.
The holding is the court’s bottom-line answer to the legal question. In a published majority opinion, it becomes the rule that governs future cases with similar facts. Everything else exists to support and explain it.
When the Decision Actually Takes Effect
An appellate opinion does not take effect the moment it is filed. The court retains jurisdiction over the case until it issues a mandate, a formal document that closes the appeal and transfers authority back to the lower court. Under the federal rules, the mandate typically issues seven days after the deadline for seeking rehearing has passed.3Office of the Law Revision Counsel. Federal Rules of Appellate Procedure Rule 41 – Mandate: Contents, Issuance and Effective Date, Stay If the losing party files for rehearing or petitions the Supreme Court, the mandate can be delayed for months. Until it issues, the lower court cannot act on the appellate decision.
Holding vs. Dicta: The Distinction That Matters Most
This is where non-lawyers get tripped up the most. Not every sentence in a judicial opinion carries the force of law. Only the holding does.
The holding, sometimes called the ratio decidendi, is the legal conclusion the court had to reach to resolve the case in front of it. It is the part that binds lower courts. If a court decides a particular search violated the Fourth Amendment and that conclusion was necessary to reach the result, that is the holding.
Dicta (short for obiter dicta, meaning “said in passing”) covers everything else: hypothetical examples, commentary on issues the court did not need to resolve, observations about how the law might apply in different circumstances. Judges include dicta constantly, sometimes to signal views on related questions and sometimes because they find the issue interesting. None of it is binding, though well-reasoned dicta from a high court can carry real persuasive weight.
A useful test: if you removed the statement from the opinion, would the result change? If not, it is dicta. Courts sometimes dress dicta up to look like holdings, and parties regularly argue about which category a passage falls into. When someone cites a case for a broad proposition, check whether the passage they are relying on was actually necessary to the decision.
How Opinions Become Precedent
Opinions do not just resolve the case at hand. They create rules that govern future disputes through stare decisis, Latin for “to stand by things decided.”4Constitution Annotated. Historical Background on Stare Decisis Doctrine The idea is predictability: when a court has resolved a legal question, other courts facing the same question should reach the same answer. People and businesses need to know what the law requires before they act.
Mandatory vs. Persuasive Authority
Precedent operates on two levels. Mandatory authority, also called binding authority, flows downward through the court hierarchy. A federal appellate court’s published opinion binds every district court within its circuit. A state supreme court’s opinion binds every lower court in that state. Supreme Court opinions bind the entire federal system.4Constitution Annotated. Historical Background on Stare Decisis Doctrine Lower courts do not get to disagree, even if they think the higher court got it wrong.
Persuasive authority is everything else: opinions from other jurisdictions, lower court rulings, dissents, concurrences, and dicta from any level. A federal court in Texas is not bound by a Ninth Circuit opinion, but it might find the reasoning useful when no binding precedent addresses the issue.
When Courts Overrule Their Own Precedent
Stare decisis is a strong presumption, not an absolute rule. The Supreme Court has identified several factors it weighs before abandoning a precedent: how sound the original reasoning was, whether the rule has proven unworkable, whether later decisions have already undermined it, and whether people have built significant reliance on the existing rule.5Constitution Annotated. Stare Decisis Factors
At the circuit court level, a standard three-judge panel generally cannot overrule a prior published decision from the same circuit. That requires the full court to rehear the case en banc, a proceeding where all active judges participate. En banc rehearings are rare precisely because they represent a serious step. The court is reconsidering and potentially undoing its own prior law.
Where to Read Opinions for Free
You do not need a law library or an expensive subscription. Several free tools put the full text of most decisions at your fingertips.
PACER (Public Access to Court Electronic Records) is the federal judiciary’s official system. Most PACER documents cost $0.10 per page, but court opinions are always free.6PACER: Federal Court Records. PACER Pricing: How Fees Work Registration is free. Users who accumulate $30 or less in fees during a quarter are not charged at all.7PACER. Pricing Frequently Asked Questions
Google Scholar has a case law search most people do not know about. It covers the U.S. Supreme Court, federal appellate and district courts, and state appellate courts.8Library of Congress. Google Scholar – How To Find Free Case Law Online Select “Case law” on the Scholar homepage, then search by keyword, party name, or citation. Results link directly to the full opinion and show which later cases cited the decision, a feature that usually costs hundreds a month on commercial platforms.
CourtListener, run by the nonprofit Free Law Project, hosts millions of federal and state opinions with no paywall. It also operates the RECAP Archive, which collects federal court documents that PACER users have accessed and makes them freely available.
Most state court systems also maintain their own websites with searchable databases of recent appellate opinions. Coverage varies: some states provide decisions going back decades, others only the last few years. For older decisions, university law libraries often give public access to commercial research tools and physical case reporters, and many are open to anyone who walks in.