Hibbs v. Winn
The Supreme Court ruled that a federal law protecting state tax collection from court interference does not block a lawsuit by Arizona taxpayers challenging a state tax credit for donations funding private-school scholarships.
Because the taxpayers were not trying to avoid paying their own taxes or reduce the state's tax revenue, the Court found their Establishment Clause challenge could proceed in federal court despite the tax-related law's usual hands-off rule.
“Plaintiffs-respondents do not contest their own tax liability. Nor do they seek to impede Arizona's receipt of tax revenues. Their suit, we hold, is not the kind § 1341 proscribes.”
The Court's core reasoning for why the tax-related jurisdictional bar does not apply to this suit.
How it got here: A federal trial court dismissed the suit under the Tax Injunction Act; the Ninth Circuit reversed; the state tax official asked the Supreme Court to review that reversal.
The Case in Depth
What happened
Arizona gives taxpayers a credit for donations to organizations that award private-school scholarships. Some of those organizations can fund religious schools. Arizona taxpayers sued in federal court, arguing the tax-credit program violates the Establishment Clause by funneling state tax money to religious schools, and asked a court to stop the credit from being used for that purpose.
The question before the Court
Does a federal law barring courts from blocking state tax collection also stop taxpayers from suing in federal court to challenge a state tax credit they say violates the Constitution?
Why it matters
The ruling lets people who object to state tax breaks on constitutional grounds bring their challenges in federal court, rather than being forced into state court or blocked entirely. It also matters directly to the Arizona program funding private-school scholarships through tax credits, which will now be tested on the merits in federal court.
What changes now
The case returns to the lower federal courts for the underlying Establishment Clause challenge to Arizona's tax-credit program to proceed on the merits, since the Supreme Court only decided that the tax-related jurisdictional bar does not block the suit. This is a final decision on the jurisdictional question, not a ruling on whether the tax credit itself is constitutional.
What this does not decide
The Court did not decide whether Arizona's tax-credit program actually violates the Establishment Clause. It only decided that the federal law barring interference with state tax collection does not prevent taxpayers from bringing that constitutional claim in federal court in the first place.
Concurrences and dissents
Concurrence — Justice Stevens
Justice Stevens agreed fully with the majority but wrote separately to stress that long-standing, unchallenged interpretations of a statute deserve strong deference from courts even without formal precedent squarely addressing the point. He argued that when Congress stays silent for decades after a settled practice develops, that silence itself supports keeping things as they are, and that this respect for established practice outweighs relying strictly on dictionary definitions.
Dissent — Justice Kennedy
“In this case, the Court shows great skepticism for the state courts' ability to vindicate constitutional wrongs.”The dissent's central objection that the majority disrespects state courts' role in resolving constitutional claims.
Justice Kennedy argued the majority's reading contradicts the plain text of the statute, which broadly bars courts from restraining any state tax assessment, and that recording a taxpayer's liability under the challenged tax-credit law is itself a form of assessment. He contended the law's purpose was not limited to protecting state revenue but also to protect states' authority over their own tax administration and their courts' role interpreting state tax law. He would have held the suit barred and let it proceed only in state court.
How the Court got there
The legal reasoning, step by step
- The Court examined the meaning of 'assessment' as used in the Tax Injunction Act, concluding that in tax law an assessment is a specific bookkeeping step — the official recording of a taxpayer's liability that triggers collection efforts — not a synonym for the entire tax system.
- Reading the word in context rather than isolation, the Court reasoned that if 'assessment' alone covered the whole tax scheme, the statute's additional words 'levy' and 'collection' would be unnecessary surplus language, which courts try to avoid when interpreting statutes.
- The Court traced the law's history to an 1867 federal statute barring similar suits against federal tax collection, noting that courts applying that older law had long allowed third-party challenges to tax benefits when the challengers were not trying to avoid their own taxes or shrink government revenue.
- Reviewing the law's legislative history, the Court found Congress was concerned specifically with taxpayers dodging their own bills or bleeding state treasuries dry through injunctions, not with barring outsiders' constitutional challenges to how tax benefits are structured.
- Applying that understanding to the facts, the Court noted the taxpayers here did not contest their own liability and that success in their suit would, if anything, increase money flowing to the state treasury rather than decrease it.
- The Court concluded that this kind of suit falls outside what the statute was designed to block, since it does not touch the state's ability to assess, levy, or collect revenue from anyone.