Key takeaways
- On March 25, 2026, the U.S. Supreme Court decided Cox Communications, Inc. v. Sony Music Entertainment, No. 24-171, in a unanimous (9-0) opinion by Justice Clarence Thomas.
- The Court reversed the U.S. Court of Appeals for the Fourth Circuit and remanded, holding that a service provider is contributorily liable only if it induced infringement or supplied a service tailored for infringement.
- Because internet access has substantial lawful uses, continuing to serve subscribers known to infringe — without more — is not enough to establish contributory liability.
- The ruling unwinds the basis for a $1 billion jury verdict against Cox and sharply limits the theory record labels have used against internet service providers.
The Decision
On March 25, 2026, the United States Supreme Court issued a unanimous decision in Cox Communications, Inc. v. Sony Music Entertainment, No. 24-171. Justice Clarence Thomas wrote for the Court; Justice Sonia Sotomayor filed an opinion concurring in the judgment, joined by Justice Ketanji Brown Jackson. The case was argued on December 1, 2025.
The Court reversed the judgment of the U.S. Court of Appeals for the Fourth Circuit and remanded the case for further proceedings. The decision resolves how far secondary copyright liability extends to internet service providers whose subscribers use a general-purpose internet connection to infringe.
What the Court Held
The Court held that a service provider is contributorily liable for a user's direct infringement only when it (1) intentionally induced or encouraged the infringing conduct, or (2) provided a service that was tailored to — that is, primarily designed for — infringement. Simply continuing to provide a general-purpose service that has substantial lawful uses, even to subscribers the provider knows have infringed, does not by itself create contributory liability.
Applying that standard, the Court concluded that Cox — whose service is internet access, a tool with overwhelmingly lawful uses — neither encouraged infringement nor offered a product designed for it. The Fourth Circuit had therefore applied too broad a standard when it affirmed contributory liability, and its judgment on that question could not stand.
Background
Sony Music Entertainment and other major record labels sued Cox Communications, an internet service provider serving millions of subscribers. A copyright-monitoring firm had sent Cox more than 160,000 notices identifying subscriber IP addresses allegedly tied to illegal music file-sharing. The labels argued that Cox knew specific subscribers were repeat infringers yet failed to terminate their accounts.
A federal jury in the Eastern District of Virginia found Cox liable for willful contributory and vicarious copyright infringement and awarded the labels $1 billion in statutory damages — one of the largest copyright awards on record. On appeal, the Fourth Circuit affirmed the contributory-infringement finding but vacated the vicarious-liability finding and the $1 billion award, remanding for a new trial on damages. Cox sought review in the Supreme Court on the contributory-liability question, and the Court granted certiorari.
Why It Matters
For years, record labels have pressed secondary-liability theories against internet service providers, arguing that providers who keep known infringers connected become responsible for the resulting piracy. The Supreme Court's decision rejects the broadest version of that theory. By requiring either inducement or a service designed for infringement, the Court draws a hard line that protects providers of general-purpose services — internet access, cloud storage, and similar tools — from liability based solely on subscriber misconduct.
The practical effect is significant: the decision removes the legal foundation for the $1 billion verdict and constrains the standard the labels can rely on when the case returns to the lower courts. It also supplies a nationwide rule that other internet service providers, technology platforms, and rightsholders will apply going forward.
Who Should Care
For lawyers
Intellectual property litigators and technology counsel should recalibrate secondary-liability assessments around the Court's two-part standard: inducement or a service tailored for infringement. Plaintiffs' theories built on a provider's mere knowledge and failure to terminate are now far weaker. Counsel for service providers should revisit repeat-infringer policies, DMCA safe-harbor compliance, and litigation-risk models in light of the narrowed standard, while plaintiff-side counsel will need evidence of active encouragement or purpose-built infringement tools.
For internet service providers and consumers
Internet service providers gain meaningful protection from billion-dollar exposure based on subscriber conduct they did not encourage. For consumers, the decision reduces pressure on providers to aggressively disconnect households accused of infringement — a practice that can cut off internet access for an entire home based on contested allegations. The balance the Court struck preserves open access to a general-purpose service while leaving rightsholders their direct-infringement remedies against the people who actually infringe.
What's Next
On remand, the lower courts must reassess the labels' claims under the Supreme Court's narrower standard, which makes a renewed finding of contributory liability substantially harder to sustain on the existing record. Separately, some copyright stakeholders have urged a legislative response: Register of Copyrights Shira Perlmutter has suggested that Congress may need to act, and commentators have floated a statutory "site-blocking" regime that would require providers to block access to piracy-dedicated websites. Any such proposal would face significant debate over free-speech and internet-infrastructure concerns, and none has been enacted.
Contributory Liability: Before and After Cox v. Sony
| Question | Fourth Circuit standard (reversed) | Supreme Court standard (Cox v. Sony) |
|---|---|---|
| What triggers liability? | Knowledge of infringement plus continued service | Inducement, or a service tailored for infringement |
| Does a general-purpose service qualify? | Could support liability if the provider knew of infringement | No — substantial lawful uses defeat liability absent inducement |
| Effect on the $1B verdict | Contributory liability affirmed; damages remanded | Contributory-liability basis reversed and remanded |
Plain-English Callout
What is "contributory" copyright infringement? Contributory infringement is a way to hold one party responsible for someone else's copyright violation. After Cox v. Sony, it applies only when a company actively encourages the infringement or offers a product built for infringing — not when it simply provides a normal service, like internet access, that some customers happen to misuse. Copyright owners can still sue the people who actually pirated their work; what they generally cannot do is collect from the internet provider just because it kept those customers connected.
This article is general legal information and commentary about legal developments. It is not legal advice, does not address your specific situation, and is not a substitute for advice from a licensed attorney. Reading this article and contacting us through this website do not create an attorney-client relationship.
Sources & authorities
- Cox Communications, Inc. v. Sony Music Entertainment, No. 24-171 (U.S. Mar. 25, 2026) — slip opinion — supremecourt.gov
- Cox Communications, Inc. v. Sony Music Entertainment, 607 U.S. ___ (2026) — full opinion and syllabus — Justia
Further reading
Additional perspectives (a link is not an endorsement):