Majority Opinion vs. Concurring Opinion: What's the Difference?

An opinion is the majority opinion only if more than half of the judges participating in the decision join the opinion itself — not merely the result. At the Supreme Court, with all nine sitting, that means five signatures on the opinion. If a Justice recuses, the denominator shrinks: with eight participating, five still join to make a majority, but four-four splits affirm by an equally divided Court with no opinion at all.

Joining the judgment is different from joining the opinion. A Justice who writes "concurring in the judgment" votes for the same winner but refuses to sign the reasoning. Those votes count toward who wins the case; they do not count toward whether an opinion is a majority. That is why a case can be decided 6-3 in outcome and still have no majority opinion — because only four Justices signed the lead opinion.

When the lead opinion falls short of a majority, courts call it a plurality opinion. The judgment still resolves the case and binds the parties, but the precedential rule is contested.

"Concurrence" is a category, not a single thing, and the label in the caption line tells you exactly how much of the majority the judge accepted. Read that line before you read the opinion.

State courts sometimes use their own vocabulary. Several jurisdictions, including Illinois and Texas appellate courts, use "specially concurring" for what federal courts call concurring in the judgment. Check the court's own conventions before you assume the label means what it means at the Supreme Court.

The holding of the majority opinion binds lower courts within the jurisdiction. That includes the reasoning necessary to the result, not just the bottom-line disposition. Dicta in a majority opinion is not binding, though lower courts often follow Supreme Court dicta as a practical matter.

A concurrence binds no one. It is persuasive authority only — the same category as a dissent, a treatise, or an out-of-circuit decision. A district judge who follows a concurrence over the majority is committing reversible error, and a brief that quotes a concurrence as though it were the Court's holding will get you punished by opposing counsel or a professor.

In the courts of appeals, the same logic runs through the law-of-the-circuit rule: a published panel majority binds later panels of that circuit until overruled en banc or by the Supreme Court. A concurring panel judge's view has no such force.

Under Marks v. United States, 430 U.S. 188, 193 (1977), when a fragmented Court decides a case and no rationale commands a majority, the holding is "the position taken by those Members who concurred in the judgments on the narrowest grounds." That is how a concurrence can become the controlling rule.

The classic illustration is Justice Powell's opinion in Regents of the University of California v. Bakke, 438 U.S. 265 (1978). No other Justice joined his diversity rationale in full, but lower courts treated it as controlling for twenty-five years, and the Court effectively ratified it in Grutter v. Bollinger, 539 U.S. 306 (2003).

Marks is easier to state than to apply. Courts disagree about whether "narrowest" means the opinion that is a logical subset of the others, the one that decides the fewest cases, or the one closest to the median vote. Circuits have split on the method, the Supreme Court granted certiorari on the question in Hughes v. United States (2018) and then resolved the case on other grounds, and some circuits hold that when no opinion is a logical subset of another, Marks yields nothing and only the judgment survives. If your problem turns on a fractured decision, say so explicitly and argue the method, not just the result.

Bluebook Rule 10.6.1 requires a weight-of-authority parenthetical whenever you cite something other than the majority. Put it after the date parenthetical, and use the judge's last name plus the correct title abbreviation.

Two mechanical points. First, the pin cite goes to the page in the separate opinion, not to the majority's page — separate opinions start deeper in the volume. Second, if you cite the majority of a case and then a concurrence in the same case, do not use "id." carelessly; the reader must be able to tell which opinion you are quoting. Spell it out.

Because a striking number of them later became the law. Justice Harlan's concurrence in Katz supplied the two-part "reasonable expectation of privacy" test that the Court adopted as its own in Smith v. Maryland, 442 U.S. 735 (1979) — you will be tested on Harlan's words, not the Katz majority's. Justice Jackson's three-category framework for presidential power in Youngstown was a lone concurrence in 1952; the Court applied it as the governing analysis in Dames & Moore v. Regan, 453 U.S. 654 (1981), and again in Medellín v. Texas, 552 U.S. 491 (2008). Justice Brandeis's concurrence in Ashwander v. TVA, 297 U.S. 288 (1936), is the standard source for the constitutional-avoidance canons.

Concurrences also function as roadmaps. A Justice writing separately to say the Court "does not decide" some question is telling litigants where the next case is. Concurrences that flag doctrines ripe for reconsideration frequently precede a grant of certiorari on exactly that issue.

Finally, they tell you how narrow the majority really is. If a fifth vote concurs to say the holding should be read narrowly, opposing counsel will cite that concurrence to cabin the case — and courts listen, because the majority would evaporate without that vote.

In your case brief, take the holding and the rule statement exclusively from the majority. Add a separate line for each concurrence with three things: what the judge agreed with, what the judge rejected, and the alternative rule proposed. If a later case adopted that alternative rule, note it — that is the fact pattern professors reward.

On an exam, lead with the majority rule and apply it. Then, if the facts sit at the edge of the doctrine, use the concurrence as your counterargument engine: "Under Justice X's approach, which the Ninth Circuit has followed, the result would be different because...." That signals you understand the difference between binding and persuasive authority. Do not open with a concurrence, and never write "the Court held" when you mean a concurring Justice said.

In practice, cite a concurrence when there is no majority holding on your point, when you are arguing to a court not bound by the majority's jurisdiction, when you are asking for a change in the law, or when a fifth-vote concurrence limits the holding your opponent relies on. Otherwise, lead with the majority — a judge who catches you dressing up a concurrence as a holding will discount everything else in your brief.