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No. 19-930October Term 2019Decided May 17, 2021Updated Sep 3, 2026

Docket 19-930October Term 2019 (2019–2020)

CIC Servs. v. IRS

CIC Servs., LLC v. IRS

The Anti-Injunction Act does not prevent a lawsuit challenging an IRS reporting rule merely because noncompliance can trigger a tax penalty.

Case status

Decided 9-0 · May 17, 2021 · Opinion by Justice Kagan

Read the opinion (PDF)
Current stage
Decided
Latest event
Decision released May 17, 2021
Case Accepted
Arguments
Decision ReleasedMay 17, 2021
What it's about

In a unanimous decision, the Supreme Court ruled that the Anti-Injunction Act does not prevent lawsuits challenging IRS regulatory mandates, such as reporting requirements, even if failing to comply results in a tax penalty. The Court determined that a suit contesting the legality of a regulation is not the same as a suit seeking to stop the collection of a tax.

Question presented

Whether the Anti-Injunction Act’s bar on lawsuits “for the purpose of restraining the assessment or collection of any tax,” 26 U.S.C. § 7421(a), precludes challenges to IRS reporting requirements backed by tax penalties.

Case path

United States Court of Appeals for the Sixth Circuit / Decision released May 17, 2021

Area

Business and Regulation

Decision

Decision record

What the Court decided

The Anti-Injunction Act does not prevent a lawsuit challenging an IRS reporting rule merely because noncompliance can trigger a tax penalty.

Impact

Businesses and other taxpayers can challenge IRS reporting mandates without first violating the rule and paying a penalty. For example, a company facing a reporting requirement may bring a lawsuit over the rule itself.

Not official Court text.

Vote

Vote split
9-0
Majority author
Elena Kagan

Opinion documents

Briefing

What it's about

The Supreme Court unanimously decided that the Anti-Injunction Act does not block lawsuits challenging IRS reporting requirements backed by tax penalties. It said challenging a regulation is different from seeking to stop tax collection.

Vote

Justice Kagan wrote the 9–0 opinion, joined by Chief Justice Roberts and Justices Thomas, Breyer, Alito, Gorsuch, and Barrett; Justices Sotomayor and Kavanaugh concurred.

The Court decided the case unanimously. No opinion author, concurrences, or dissents are identified here.

Impact

Businesses and other taxpayers can challenge IRS reporting mandates without first violating the rule and paying a penalty. For example, a company facing a reporting requirement may bring a lawsuit over the rule itself.

What's next

The Court has finished its action in this case. Taxpayers challenging similar IRS regulatory mandates may seek to bring their claims without first paying a related penalty.

What did the Supreme Court rule in CIC Services v. IRS?

The Court said the Anti-Injunction Act does not bar lawsuits challenging IRS reporting requirements backed by tax penalties.

Who is affected by the CIC Services decision?

Businesses and taxpayers subject to IRS reporting mandates may challenge those rules without first violating them and paying a penalty.

What happens next in CIC Services v. IRS?

The Supreme Court has completed the case. Similar challenges to IRS regulatory requirements can proceed under the Court's interpretation.

Timing

Decided May 17, 2021

The Court released its decision on May 17, 2021 without hearing oral argument.

Activity

Docket activity5
  • AI analysis generated: Case Briefing

    Sep 3, 2026 | Generated

  • Brief added: Questions Presented

    Mar 8, 2026 | Court records

  • Opinion added: opinion

    May 17, 2021 | Court records

  • Brief added: Petition

    Jan 17, 2020 | Court records

  • Court Order added: Lower Court Orders/Opinions

    Oct 21, 2019 | Court records