§ 1402(a)(13) “Limited Partner” Means a Partner Who Plays No Significant Managerial Role (Fifth Circuit)

1. Introduction

In K Alain v. CIR (formerly operating under the name Sirius Solutions, L.L.L.P.), the United States Court of Appeals for the Fifth Circuit revisited the meaning of “limited partner” in 26 U.S.C. § 1402(a)(13), the provision that excludes certain limited-partner distributive shares from “net earnings from self-employment” and therefore from Social Security and Medicare self-employment tax.

The partnership allocated all ordinary business income to its limited partners and reported $0 net earnings from self-employment for 2014–2016, invoking § 1402(a)(13). The Commissioner issued FPAAs asserting that none of the limited partners qualified as “limited partners” for this federal tax purpose, thereby increasing net earnings from self-employment to reflect partnership income. The Tax Court upheld the Commissioner based on Soroban Capital Partners LP v. Commissioner, which treated § 1402(a)(13) as limited to “passive investors.”

On rehearing, the Fifth Circuit withdrew its prior panel opinion (Sirius Solutions, L.L.L.P. v. Commissioner of Internal Revenue, 165 F.4th 374 (5th Cir. 2026)) and substituted a new interpretation: the original public meaning of “limited partner” in 1977 is a partner who plays no significant role in managing or running the business. The court vacated and remanded for application of that standard.

2. Summary of the Opinion

The Fifth Circuit held that because § 1402(a)(13) does not define “limited partner,” the court must apply its ordinary public meaning at the time of enactment (1977). Drawing on contemporaneous legal dictionaries, uniform-law background, treatises, and contextual legal understanding, the court concluded:

  • “Limited partner” in § 1402(a)(13) means a partner who plays no significant role in managing or running the business.
  • This meaning is federal (tax law is federal law), not controlled by state labels once state-law interests are identified.
  • The Tax Court’s rule in Soroban Capital Partners LP v. Commissioner—that “limited partner” refers only to “passive investors”—was rejected as insufficiently grounded in the statutory text’s original public meaning.
  • The judgment was VACATED and REMANDED so the Commissioner may determine whether the partners at issue meet the Fifth Circuit’s “no significant managerial role” meaning.

A dissent would have affirmed the Tax Court, concluding the statutory phrase and structure limit the exclusion to partners functioning as passive investors.

3. Analysis

3.1. Precedents Cited

Federal meaning vs. state law labels

  • United States v. Bess, 357 U.S. 51 (1958) and Burnet v. Harmel, 287 U.S. 103 (1932): The majority invoked these to frame the analysis as a federal question—state law may create interests, but federal law determines how federal tax consequences attach once those interests exist. This supported treating “limited partner” as a federal statutory term, not a term whose scope is dictated by Delaware’s entity classifications alone.

Original public meaning methodology

  • Wis. Cent. Ltd. v. United States, 585 U.S. 274 (2018) (quoting Perrin v. United States, 444 U.S. 37 (1979)): The majority used these to justify a textualist approach—undefined statutory words should be read in accordance with their ordinary meaning at enactment.
  • Belt v. EmCare, Inc., 444 F.3d 403 (5th Cir. 2006): Cited for the routine use of dictionaries to ascertain ordinary meaning. This underwrote the court’s reliance on the 1968 and 1979 editions of Black’s Law Dictionary.

Backdrop authority on “limited partners” and control

  • Plasteel Prods. Corp. v. Helman, 271 F.2d 354 (1st Cir. 1959) (citing Rathke v. Griffith, 218 P.2d 757 (Wash. 1950)): The majority treated Plasteel as part of the historical legal “backdrop” suggesting that the limited-partner concept was keyed to control—and that limited partners could have some involvement so long as they did not exercise controlling managerial power. The dissent strongly disputed this reading, arguing Plasteel does not endorse any permissible “lesser control” threshold and is inapposite state-law debt-liability litigation.

Judicial role vs. agency interpretations

  • Loper Bright Enters. v. Raimondo, 603 U.S. 369 (2024): The majority invoked this in rejecting the notion that Tax Court interpretations can displace the court’s independent duty to decide questions of law.
  • Buenrostro-Mendez v. Bondi, 166 F.4th 494 (5th Cir. 2026): Used to emphasize that long administrative practice cannot override statutory text. Here, the majority used it to rebut reliance on settled practice where that practice is inconsistent with “plain text” (as understood through original meaning).

Textualism over policy consequences

  • BP P.L.C. v. Mayor & City Council of Balt., 593 U.S. 230 (2021) (quoting Lewis v. Chicago, 560 U.S. 205 (2010)): Cited to reject the dissent’s policy-based “parade of horribles” and to insist the court’s task is applying statutory meaning, not minimizing perceived mischief.

Other “limited partner” usage in non-tax contexts (raised in the dissent; addressed by the majority)

  • Masel v. Villarreal, 924 F.3d 734 (5th Cir. 2019); Marin TV Servs. Partners, Ltd. v. FCC, 993 F.2d 261 (D.C. Cir. 1993); Steinhardt Grp. Inc. v. Citicorp, 126 F.3d 144 (3d Cir. 1997): The dissent cited these (and others) to argue “limited partner” is commonly equated with “passive investor” across federal case law. The majority responded that such out-of-context authorities interpreting other statutes (e.g., securities law) cannot override the original meaning of § 1402(a)(13), and noted that some of those cases themselves recognize limited partners can have nominal or limited responsibilities without losing “limited” character.

Tax Court precedents central to the dispute

  • Soroban Capital Partners LP v. Commissioner, 161 T.C. 310 (2023): This was the Tax Court’s controlling basis for rejecting the exclusion here. The Fifth Circuit explicitly rejected Soroban’s “passive investor” approach as insufficiently rooted in contemporaneous textual authority and as too strict in its apparent intolerance even for minor non-managerial involvement.
  • Renkemeyer, Campbell & Weaver v. Commissioner, 136 T.C. 137 (2011): Discussed prominently in the dissent as part of a line of Tax Court cases applying a functional analysis focused on whether distributive shares reflect returns on investment vs. compensation for services. The majority declined to engage those additional Tax Court precedents because it resolved the appeal by determining the statutory meaning and rejecting Soroban.
  • Denham Capital Management LP v. Commissioner, T.C.M. 2024-114: Cited in the dissent as reaffirming Soroban’s functional approach; not addressed by the majority as necessary to its holding.
  • Green v. C.I.R., 507 F.3d 857 (5th Cir. 2007): Cited in the dissent for standards of appellate review of Tax Court decisions.

3.2. Legal Reasoning

(a) The statutory architecture: what is taxed and what is excluded

The majority’s reasoning begins with the self-employment tax framework: § 1401 imposes Social Security and Medicare tax on “net earnings from self-employment,” and § 1402(a) generally includes a partner’s distributive share from a partnership trade or business. Section 1402(a)(13) then carves out a limited-partner exclusion for distributive shares, while still taxing guaranteed payments for “services actually rendered.”

(b) The interpretive pivot: defining “limited partner” as of 1977

Because § 1402(a)(13) does not define “limited partner,” the court framed the interpretive task as identifying the term’s ordinary public meaning in 1977. It relied chiefly on:

  • Contemporaneous legal dictionaries (notably Black’s Law Dictionary 1968/1979), which describe limited partners as contributing capital and sharing profits but taking no part in running the business—supporting a management-role-based distinction.
  • Uniform Limited Partnership Act (1916) and the Uniform Limited Partnership Act (1976), both emphasizing that taking part in “control of the business” jeopardizes limited status—reinforcing control/management as the conceptual dividing line.
  • Treatises describing limited partners as typically not participating in management and explaining the rationale for limited-liability protection as tied to refraining from control.

Synthesizing these sources, the majority adopted a functional meaning: a limited partner is one who plays no significant role in managing or running the business—signaling a threshold concept rather than an absolute bar on any involvement.

(c) Rejection of Soroban’s “passive investor” formulation

The Fifth Circuit faulted Soroban for selecting a “passive investor” rule without grounding it in the original public meaning of the statutory text and for implying that even “minor” involvement defeats limited-partner status. In the Fifth Circuit’s view, the historically rooted distinction is between managerial (control) and non-managerial roles, not between “active” and “passive” in the broadest sense.

(d) Administrative guidance: helpful but not controlling

The majority highlighted decades of IRS instructions that described “limited partner” largely in terms of limited liability. But it framed that guidance as unable to change statutory meaning without Congress and, in any event, required to comport with the meaning enacted in 1977. This created a notable tension: the court rejected the Tax Court’s restrictive “passive investor” approach, but also declined to accept a liability-only approach as dispositive of the statutory term’s meaning.

(e) Remedy: vacatur and remand

Rather than decide whether Sirius’s partners qualify under the court’s meaning, the Fifth Circuit vacated and remanded for the Commissioner to consider whether the partners “fall within that meaning of § 1402(a)(13).” The remand posture is consequential: it preserves factual and administrative evaluation of what counts as “significant” managerial participation in the specific partnership’s operations.

3.3. Impact

Immediate doctrinal effect in the Fifth Circuit

  • The decision establishes a circuit precedent that § 1402(a)(13) turns on whether the partner plays no significant managerial role, rather than Soroban’s more categorical “passive investor” requirement.
  • The ruling is poised to generate litigation over the boundary between “significant” and “insignificant” managerial involvement—especially for modern entities (LLLPs, LLCs taxed as partnerships) whose governance often blurs traditional limited/general roles.

Institutional and administrative consequences

  • The court’s critique of the IRS’s long-standing “limited liability” instructional definition suggests future disputes over how much deference (if any) such sub-regulatory materials deserve, and whether the IRS must revise instructions or issue clearer guidance consistent with the court’s historical meaning.
  • By rejecting the Tax Court’s approach in Soroban, the decision heightens the possibility of a circuit split if other circuits adhere to Soroban-like “passive investor” framing.

Practical tax planning implications

  • Partnerships may increasingly litigate (or document) the managerial roles of limited partners—committee seats, voting rights, approval rights, authority over personnel/operations—because the “significance” of involvement becomes the pivotal criterion.
  • Guaranteed payments remain taxable under § 1402(a)(13)’s express carve-out, but disputes may intensify over whether distributive shares (as opposed to guaranteed payments) are shielded when partners provide services while allegedly staying outside “significant” management.

4. Complex Concepts Simplified

  • Self-employment tax (Social Security and Medicare tax): A federal tax on earnings from working for yourself, including certain partnership income.
  • Distributive share: A partner’s allocated share of partnership income or loss, whether or not actually distributed in cash.
  • Guaranteed payments (26 U.S.C. § 707(c)): Payments to a partner for services (or use of capital) determined without regard to partnership income—similar to compensation; § 1402(a)(13) keeps these taxable even for qualifying limited partners.
  • FPAA (Final Partnership Administrative Adjustment): The IRS’s partnership-level adjustment notice under the partnership audit regime applicable to the years at issue; it is the predicate for Tax Court litigation.
  • Original public meaning: A method of interpretation focusing on how a reasonable reader at the time of enactment would have understood the statutory terms.
  • “No significant role in managing or running a business”: The Fifth Circuit’s operative test; it focuses on whether the partner meaningfully participates in management/control, not merely on state-law labels or a strict “passive investor” characterization.

5. Conclusion

K Alain v. CIR establishes that, for purposes of the limited-partner exclusion in 26 U.S.C. § 1402(a)(13), the term “limited partner” carries its 1977 ordinary public meaning: a partner who plays no significant role in managing or running the business. By rejecting Soroban Capital Partners LP v. Commissioner and remanding for application of a management-role-based definition, the Fifth Circuit reframes a high-stakes self-employment tax question around historical meaning and managerial control rather than a categorical “passive investor” label or a liability-only administrative shorthand.