Judicial branch · Landmark case
National Federation of Independent Business v. Sebelius
567 U.S. 519 (2012) · Opinion of the Court
What you should know
This page explains the Court’s holding in plain language, where the official text lives, and what to check next.
Supreme Court findings are not news summaries. The controlling document is the Court’s opinion, plus any concurrences or dissents. Use this profile to understand the holding, then verify language, syllabus, and docket history on official sources before relying on a secondary account. This case involves multiple separate votes on different questions — a genuinely unusual structure worth reading carefully rather than compressing into a single yes/no.
The Court held the Affordable Care Act’s individual mandate could not be justified under the Commerce Clause, but upheld it anyway as a valid exercise of Congress’s power to tax, since the penalty for not carrying insurance functioned like a tax. Separately, the Court held Congress went too far by threatening to cut off a state’s existing Medicaid funding entirely if it declined the ACA’s Medicaid expansion — a level of coercion the Spending Clause doesn’t permit.
Background
The Affordable Care Act of 2010 required most Americans to carry health insurance or pay a penalty (the “individual mandate”), and gave states federal funding to expand Medicaid eligibility — but threatened to revoke a state’s entire existing Medicaid funding, not just the new expansion money, if it refused. Twenty-six states, the National Federation of Independent Business, and individual plaintiffs sued, arguing Congress had no constitutional power to force people to buy a commercial product, and that the Medicaid funding threat was unconstitutionally coercive.
The case produced no single majority opinion on every question. Chief Justice Roberts wrote the controlling opinion, but different five-justice coalitions agreed with different parts of his reasoning — one bloc joined him in rejecting the Commerce Clause justification, a different bloc joined him in upholding the mandate as a tax.
The Court drew a real, enforceable line under both the Commerce Clause and the Spending Clause in the same case.
This is one of the only modern cases where the Court found a genuine limit on Congress’s commerce power (echoing Lopez) and, separately, a genuine limit on how much pressure Congress can put on states through conditional federal funding — two distinct federalism boundaries in one ruling.
Vote and authorship
| On the mandate (tax power) | Roberts, C.J., joined by Ginsburg, Breyer, Sotomayor, Kagan — 5–4 |
|---|---|
| On the mandate (Commerce Clause) | Roberts, joined by Scalia, Kennedy, Thomas, Alito, rejected Commerce Clause as a basis |
| On Medicaid coercion | Roberts, Breyer, Kagan, joined by Scalia, Kennedy, Thomas, Alito — 7–2 |
| Dissent | Scalia, Kennedy, Thomas, Alito (jointly authored, would have struck down the whole law); Ginsburg (in part) |
The Framers created a Federal Government of limited powers, and assigned to this Court the duty of enforcing those limits. The Court does so today.
Chief Justice Roberts · NFIB v. Sebelius
How it fits in government
Legislative branch
The ruling forces Congress to consider whether a mandate-style policy can be structured as a tax if the Commerce Clause won’t support it — a real drafting constraint for future legislation.
Judicial branch
A genuinely fractured opinion, with the controlling reasoning drawn from parts of several separate writings rather than one clear majority.
State & local government
States gained real leverage from this ruling: the federal government can offer funding conditions, but can’t threaten to pull funding a state already relies on as punishment for declining new conditions.
Official records visitors may need
SupremeCourt.gov
Opinions, docket search, rules, and Court information.
Oyez
Case abstract, oral argument audio, and justice votes.
Opinion text (LII)
Readable public text of the case.
GovInfo · U.S. Courts
Official publications and related federal court materials.
Related research paths
Wickard v. Filburn
The broad reading of Commerce Clause power this case found a real limit to.
Spending Clause
How Congress attaches conditions to federal funding, and where coercion becomes unconstitutional.
Federal Budget
How Medicaid and other federal-state funding programs actually work.
Landmark cases guide
Other holdings that define structural powers across the three branches.