In law, dicta refers to statements in a court’s opinion that weren’t necessary to decide the case. The term is short for the Latin obiter dictum, meaning “said in passing.” The dicta meaning in law matters because these statements do not bind future courts the way a holding does, yet judges and lawyers still rely on them all the time as persuasive authority, and the line between the two is not always clean.
How Dicta Differs From the Holding
Every judicial opinion contains two kinds of statements doing different work. The first is the ratio decidendi, roughly “the reason for the decision.” That’s the reasoning tied to the specific facts that produces the rule resolving the dispute. Lower courts in the same jurisdiction have to follow it. When lawyers say a case “holds” something, this is what they mean.
Everything else is dicta. Observations, hypotheticals, policy commentary, asides about how a rule might apply to facts not before the court. A judge might speculate about a question the parties never briefed, or sketch a broader principle that reaches past what the case actually requires.
There’s a practical test. If you could delete the statement from the opinion without changing who wins, it’s probably dicta. That test is rough, and courts sometimes disagree about which side of the line a particular passage falls on, but it captures the core distinction.
The consequences are concrete. Citing binding precedent compels a court to follow the rule. Citing dicta invites the court to consider a perspective. Same words on the page, very different weight.
Types of Dicta
Not every dictum carries the same weight. Two categories are usually distinguished, and the difference matters when a later court decides how seriously to take the statement.
Obiter Dicta
Obiter dicta are the classic form: passing remarks, hypotheticals, or general observations that play no role in deciding the case. Because they typically weren’t argued by the parties or tested through the adversarial process, courts treat them as interesting but not particularly reliable signals of how the law would actually develop.
In United States v. Lopez (1995), the Supreme Court struck down a federal law banning guns near schools, holding that gun possession near a school is not economic activity that substantially affects interstate commerce. The opinion also included broader commentary about federalism and preserving state authority as a laboratory for experimentation. Those observations reached beyond what was needed to resolve the Commerce Clause question and are considered obiter dicta.1Justia U.S. Supreme Court Center. United States v. Lopez, 514 U.S. 549 (1995)
Judicial Dicta
Judicial dicta sit higher. The court deliberately addresses a legal point, the parties argued it, and the discussion reflects careful reasoning rather than an offhand remark. The statement still isn’t necessary to the outcome, but the court plainly intended it as guidance. Some courts treat judicial dicta as nearly binding on lower courts, especially when the higher court appears to be signaling how it would rule if the question came up squarely.
Planned Parenthood v. Casey (1992) illustrates the concept. The core holding addressed specific Pennsylvania abortion restrictions. But the joint opinion also included an extended discussion of stare decisis and personal liberty under the Fourteenth Amendment, reaffirming what the Court described as the “essential holding” of Roe v. Wade.2Justia U.S. Supreme Court Center. Planned Parenthood of Southeastern Pa. v. Casey, 505 U.S. 833 (1992) Much of that broader reasoning went beyond what was strictly needed to evaluate the Pennsylvania provisions, but it was argued extensively and stated with obvious deliberateness, giving it substantial persuasive force in later cases.3Library of Congress. Planned Parenthood of Southeastern Pennsylvania v. Casey
Concurrences and Dissents
A common question is whether concurring and dissenting opinions count as dicta. Technically, yes. A dissent by definition disagrees with the outcome, so it plays no part in deciding the case; remove it and the judgment stands. A concurrence agrees with the result but adds something extra, and that extra doesn’t drive the outcome either.
Treating those opinions as legally inert would still be a mistake. A dissent can reshape the law decades later. Justice Oliver Wendell Holmes Jr.’s dissent in Lochner v. New York (1905) had no legal force when he wrote it. The majority struck down a state law capping bakery workers’ hours, and Holmes objected that the Court was reading its own economic preferences into the Constitution.4Justia U.S. Supreme Court Center. Lochner v. New York, 198 U.S. 45 (1905) His reasoning eventually became the mainstream view, and his dissent is now cited far more often than the majority opinion it challenged.
When Dicta Becomes Law
The most striking feature of dicta is that it doesn’t always stay dicta. A remark made in passing in one case can be adopted as a binding rule in a later one, and when that happens the original statement effectively becomes law.
The paradigm example is Footnote 4 in United States v. Carolene Products Co. (1938). The case itself was unremarkable: the Court upheld a federal ban on “filled milk” under a rational basis standard. Justice Harlan Fiske Stone’s footnote suggested that courts should apply stricter review when legislation targets “discrete and insular minorities” or restricts political processes that would normally allow the democratic system to correct itself.5Justia U.S. Supreme Court Center. United States v. Carolene Products Co., 304 U.S. 144 (1938) The footnote had nothing to do with filled milk. It was pure dicta. Yet the idea took root, and over the following decades courts developed the framework into what is now known as strict scrutiny, one of the central doctrines of constitutional law.
The same trajectory shows up in more recent constitutional history. When the Supreme Court struck down a Texas law criminalizing same-sex sexual conduct in Lawrence v. Texas (2003), the formal holding rested on the Due Process Clause. But the opinion’s language swept much wider, declaring that “liberty presumes an autonomy of self that includes freedom of thought, belief, expression, and certain intimate conduct.”6Justia U.S. Supreme Court Center. Lawrence v. Texas, 539 U.S. 558 (2003) Twelve years later, Obergefell v. Hodges (2015) drew on that broader reasoning about autonomy and intimate choice in recognizing same-sex marriage as a constitutional right.7Justia U.S. Supreme Court Center. Obergefell v. Hodges, 576 U.S. 644 (2015)
The line between dicta and holding, then, is not a wall. It’s closer to a fence courts can move. A lower court that ignores persuasive dicta from the Supreme Court isn’t technically wrong, but it may be reversed when the higher court gets a chance to convert that dicta into a holding. Experienced practitioners read stray paragraphs in majority opinions carefully for that reason. They often signal where the law is headed before it arrives.
What This Means for Citing Dicta
The central risk for a lawyer citing dicta is misrepresenting it. Presenting a non-binding statement as if it were binding precedent is more than a strategic error. Under the Model Rules of Professional Conduct, lawyers owe a duty of candor to the tribunal, which includes accurately representing the state of the law. Citing dicta without acknowledging its status risks misleading the court about the strength of the position.
Ignoring relevant dicta carries its own cost. If a higher court has clearly signaled its thinking through non-binding language, failing to address that language hands the opposing side an easy argument. The workable approach is to cite dicta for what it is: persuasive authority that reflects the court’s reasoning, not a rule the court must follow. Transparency about the distinction tends to build credibility rather than undermine it.
Courts themselves are not uniform. Some judges give heavy weight to considered dicta from the Supreme Court, treating it as effectively binding until the Supreme Court says otherwise. Others are more willing to chart their own course when the statement was clearly made in passing. The persuasive value of any particular passage depends on which court is hearing the case and how deliberately the original statement was made.