Binding vs Persuasive Authority: Which Courts Bind Which

Binding authority (also called mandatory authority) is law a court must follow: constitutions, statutes, regulations, and the decisions of higher courts in its own jurisdiction. Persuasive authority is law a court may consider and is free to reject: other jurisdictions' decisions, coordinate and lower courts, dicta, secondary sources. Which bucket a case falls into turns on exactly two questions. What law governs the issue, and which court are you in?

The definitions take one sentence, and most explanations stop there. The map is where briefs go wrong. "Higher courts bind lower courts in the same jurisdiction" is true and unhelpful at the exact seams where the question comes up: a state court reading a federal circuit case, a federal court deciding a state-law claim, a circuit split, an unpublished opinion that says exactly what you need. Each has a definite answer, and the stakes are not stylistic. The label you hang on a case is a statement about the court's own duty, and clerks check it.

What is binding authority?

Binding authority is any source of law a court is obligated to apply. Cornell's Legal Information Institute defines mandatory authority as the constitutions, legislation, and judicial decisions that bind a given court, under the general rule that lower courts must follow the precedents of higher courts in the same jurisdiction. The engine behind the rule is stare decisis, and its two directions do different work: vertical stare decisis, the duty a lower court owes a higher one, is what makes authority binding; horizontal stare decisis, a court's respect for its own prior decisions, is strong practice rather than strict obligation.

The definitions hide the operative fact: binding is a relationship, not a property of the case. The same Ninth Circuit opinion is binding in the Central District of California and merely persuasive in a California Superior Court three blocks away. Georgetown Law's Writing Center handout reduces the classification to two steps: decide whether the issue is governed by state or federal law, then identify the court you are in. Only then does the label attach.

What is persuasive authority?

Persuasive authority is everything a court may follow but need not: decisions from other states and other circuits, lower and coordinate courts, dicta, most unpublished opinions, and every secondary source. Treatises, restatements, and law review articles are always persuasive, never binding, which is one practical stake in the primary versus secondary source distinction.

Persuasive does not mean weak. On an issue of first impression there is no binding authority, and the case will be decided entirely on persuasive material. The label tells you what the court owes the authority, not what the authority is worth.

Which courts bind which?

Here is the map, condensed from the Georgetown handout. Find your row by the court you are in and the law that governs the issue.

Read the third row carefully: "any federal court" includes the Supreme Court, which is exactly as bound as a magistrate judge on the meaning of a state's law.

Knowing the table is not the same as knowing which case controls your motion. Finding the controlling case for a live issue, and confirming nothing has displaced it, is a research process of its own; our guide to how to find controlling authority walks that process step by step.

The five rules the quick answers fumble

Federal courts do not bind state courts (except the Supreme Court)

Geography feels like hierarchy, and it is not. The Ninth Circuit does not bind California state courts on anything, including federal law, even though California sits inside the Ninth Circuit. On federal questions, state courts owe obedience to the U.S. Supreme Court and to the higher courts of their own state, and to nothing else. The Georgetown handout states the rule flatly: with the exception of the U.S. Supreme Court, federal courts bind only other federal courts. Cite a circuit case to a state judge for its reasoning, openly, as persuasive. Pitch it as controlling and you have misstated the court's own duty to its face; every other citation in the brief reads through that error afterward.

On state law, the state's highest court binds federal courts

Run the same seam the other direction and the deference flips. Under the Erie doctrine, a federal court sitting in diversity applies state substantive law and federal procedural law. On what the state's law means, the state's highest court has the final word, and its interpretation binds every federal court, the Supreme Court included. Where the high court has not spoken, the federal court predicts how it would rule, and the state's intermediate appellate courts do most of the predicting: a considered intermediate ruling "is a datum for ascertaining state law which is not to be disregarded by a federal court unless it is convinced by other persuasive data that the highest court of the state would decide otherwise." West v. American Telephone & Telegraph Co., 311 U.S. 223, 237 (1940). Datum, not command. And the prediction never becomes state law: a federal court's reading of Texas law is persuasive, not binding, in a Texas state courtroom.

Sister circuits are persuasive; a circuit binds itself

No federal circuit binds another. When circuits split, each side is merely persuasive everywhere else, which is why splits persist until the Supreme Court resolves them. Within a circuit, the "law of the circuit" rule applies: a published decision by a three-judge panel binds later panels of the same court until the en banc court or the Supreme Court overrules it, and nearly every circuit follows some version of the rule. A published Fifth Circuit panel opinion is therefore binding in the Fifth Circuit and its district courts, and persuasive everywhere else.

District court decisions bind no one

Not other districts, not their own district, not even their own author. The Supreme Court endorsed the blunt version in Camreta v. Greene, 563 U.S. 692, 709 n.7 (2011), quoting the Moore's Federal Practice treatise: "A decision of a federal district court judge is not binding precedent in either a different judicial district, the same judicial district, or even upon the same judge in a different case." A thorough published district court opinion can still be the most useful thing you cite, particularly on questions appellate courts rarely reach, but it must be argued as persuasive, never presented as controlling.

Unpublished opinions are citable, not binding

Courts dispose of a large share of their docket in unpublished or non-precedential opinions and designate them as binding on no one, sometimes excepting the same parties under law of the case. Federal Rule of Appellate Procedure 32.1 settled the citation half of the question: no federal court of appeals may prohibit or restrict citation of unpublished federal dispositions issued on or after January 1, 2007. It deliberately left the precedent half alone. The committee note says the rule takes no position on "what effect a court must give" an unpublished opinion, so citable and binding remain different things, and the weight such an opinion carries still varies circuit to circuit under local rules. State practice varies more, and some states still restrict citation. Check the local rule before an unpublished case goes in your brief.

How do you argue persuasive weight?

Binding authority argues itself: show the court it is bound and that the case is on point. Persuasive authority has no weight until you give it some. The UCLA Law Library's guide states the duty plainly: cite a case that is merely persuasive and you owe the court an explanation of why it should follow the precedent. The reasons the guide lists are the ones that move judges:

• Every other court to reach the question has come out the same way. "Nine circuits have reached this question, and all nine hold..." does more work than any single citation, and a lone outlier cuts the other way.
• The other jurisdiction construed identical statutory language or weighed the same public policy. The strongest card in statutory cases.
• The facts are materially like yours, rather than the same doctrine at high altitude.
• The decision is the most recent authority on the point.

None of that excuses you from the analysis. A persuasive case earns adoption by its reasoning, so walk the court through the reasoning, not just the result.

Two drafting disciplines follow. First, never dress persuasive authority as binding; judges notice, and your binding citations pay the credibility tax. Flag it and argue its weight openly. Second, separate holding from dicta before relying on anything, because only the holding binds even within a jurisdiction; our guide to reading a court opinion covers how to make that cut. Building the consensus picture is ordinary case law research pointed across jurisdictions instead of at one. That sweep is where CaseRead earns its keep: it searches public law across every US jurisdiction and your firm's own files together, so the survey behind a "nine circuits agree" sentence, and the prior brief where your firm already made it, come back in one pass, citing only sources it actually retrieved.

The two-question habit

Every binding-versus-persuasive call reduces to the same two questions: what law governs this issue, and what court am I in? Ask them before evaluating any case, and the table does the rest. The expensive mistakes are rarely definitional. They are map errors: circuit authority pitched as controlling in state court, an Erie prediction treated as the last word on state law, an unpublished opinion cited where the local rule forbids it.

The error a court forgives least sits one level down: a citation that does not say what the brief claims, or does not exist at all. Before anything you file leaves your desk, paste it into CaseRead's free Hallucination Shield. It extracts the citations and checks each one (up to 25 per run) against real court data, no signup required. And if you want verification built into the research itself instead of bolted on before filing, that is the rest of CaseRead.

Frequently asked questions

Is dicta binding authority? No. Only a court's holding, the ruling necessary to resolve the case, carries binding force. Dicta are observations a judge makes along the way that the outcome does not depend on. Dicta from a higher court can still be strong persuasive authority, and lower courts often follow considered dicta from their supreme court, but no court is required to.

Are unpublished opinions binding precedent? Generally no. Courts designate unpublished or non-precedential opinions as binding on no one, sometimes excepting the same parties under law of the case. Federal Rule of Appellate Procedure 32.1 bars the federal courts of appeals from prohibiting or restricting citation of unpublished federal opinions issued on or after January 1, 2007, but it says nothing about their precedential effect, and the weight they carry still varies court to court under local rules. Check the issuing court's rule before relying on one.

Is the U.S. Supreme Court binding on state courts? Yes, on questions of federal law. Every court in the country, state or federal, must follow U.S. Supreme Court holdings on the U.S. Constitution and other federal law. On questions of state law the arrangement flips: the state's own highest court has the final word, and its interpretation of that state's law binds every court, including the U.S. Supreme Court.

Are federal district court decisions binding on anyone? No. As the Supreme Court noted in Camreta v. Greene, quoting the Moore's Federal Practice treatise, a district court decision is not binding precedent in a different judicial district, the same judicial district, or even on the same judge in a different case. District court opinions are persuasive authority only, though a well-reasoned published one can carry real weight, especially where appellate authority is thin.

What are examples of persuasive authority? Decisions from other states' courts; federal court of appeals and district court decisions cited in state court; sister-circuit decisions cited in federal court; district court opinions anywhere; dicta from any court; most unpublished opinions; and all secondary sources, including treatises, restatements, and law review articles. A court may adopt the reasoning of any of these, but nothing requires it to.