125 F.4th 245
D.C. Cir.2025Background
- Michael Lissack provided information to the IRS suggesting that a condominium development group underreported taxes related to golf-club membership deposits, leading the IRS to investigate.
- The IRS's investigation, based on Lissack's tip, found no wrongdoing regarding membership deposits but did uncover an unrelated improper $60 million bad-debt deduction, resulting in a tax adjustment.
- The IRS denied Lissack a whistleblower award, stating his information did not relate to the actual issue that yielded collected proceeds.
- Lissack challenged the IRS regulation (Whistleblower Definitions Rule) interpreting what counts as an "administrative action," "proceeds based on," and "related actions" under the whistleblower statute, arguing for a broader reading.
- The Tax Court granted summary judgment to the IRS, finding Lissack's information did not "substantially contribute" to the IRS's recovery, and the D.C. Circuit affirmed; the Supreme Court then vacated and remanded for reconsideration without Chevron deference following Loper Bright.
- On remand, the D.C. Circuit again affirmed the Tax Court, holding the IRS regulation a correct interpretation of the statute under de novo review.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether the Tax Court had jurisdiction | Tax Court has jurisdiction over any IRS whistleblower award determination, including denials like his. | Jurisdiction is limited; denial not reviewable if IRS's award is not based on the whistleblower's information. | Tax Court had jurisdiction; denial letter was a reviewable determination. |
| Validity of the Whistleblower Definitions Rule ("administrative action," "proceeds based on," "related actions") | The regulation is too narrow; statute requires broader but-for causation; should get award if any recovery followed from his tip. | Regulation is consistent with statute: awards only if information substantially contributed to the specific recovery. | The IRS's interpretation is correct; awards only for substantial contributions to the IRS recovery attributable to the whistleblower's information. |
| Whether the bad-debt adjustment constituted a "related action" under the statute | Any recovery from same taxpayer should be related if original tip led to investigation. | "Related action" means action against another person or separate underpayment, not an unrelated issue for the same taxpayer. | The bad-debt issue was unrelated; not a related action under the rule or statute. |
| Whether summary judgment was appropriate and if more discovery was required | Disputed whether agent relied on his information; record incomplete; wants broader discovery. | No material factual dispute; Lissack failed to timely seek supplementing the record. | Record was sufficient; no material factual dispute; summary judgment proper. |
Key Cases Cited
- Chevron, U.S.A., Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837 (1984) (court's prior standard for agency deference, now overruled)
- Loper Bright Enterprises v. Raimondo, 144 S. Ct. 2244 (2024) (overruling Chevron; courts must exercise independent judgment about agency authority)
- Heckler v. Chaney, 470 U.S. 821 (1985) (agency enforcement discretion generally not judicially reviewable)
- CSX Transp., Inc. v. Ala. Dep’t of Revenue, 562 U.S. 277 (2011) (statutory interpretation begins with statutory text)
- Anderson v. Liberty Lobby, Inc., 477 U.S. 242 (1986) (summary judgment standard – genuine dispute of material fact needed to go to trial)
- Skidmore v. Swift & Co., 323 U.S. 134 (1944) (agency interpretations may have persuasive value depending on reasoning and consistency)