The Tax Times: Fifth Circuit Shields Limited Partners From Self‑Employment Tax in Sirius Solutions v. Commissioner

Sirius Solutions, L.L.L.P. v. Commissioner, No. 24-60240 (5th Cir. Jan. 16, 2026), is a major taxpayer win that adopts a bright-line, liability-based definition of “limited partner” for the Section 1402(a)(13) self-employment tax exception. It rejects the Tax Court’s functional analysis and holds that partners in a state-law limited partnership (including an LLLP) who have limited liability qualify for the limited partner exception on their distributive shares, even if they materially participate, with self-employment tax generally limited to their guaranteed payments.

What the Fifth Circuit Held

· A “limited partner” under Section 1402(a)(13) means a partner in a limited partnership who has limited liability under applicable state law.

· The phrase “as such” in Section 1402(a)(13) means that the exception applies to income earned in the partner’s legal capacity as a limited partner, not to compensation for services (e.g., guaranteed payments).

· The court expressly rejected the Tax Court’s “functional analysis,” which had disqualified Sirius’s limited partners because they were actively involved in the consulting business.

· The decision vacates the Tax Court and remands, but there is little left to resolve other than mechanics given the court’s construction of “limited partner.”

Facts and Procedural Background

· Sirius Solutions operated as a Texas limited liability limited partnership (LLLP), with a corporate general partner (Sirius GP, LLC) holding a very small percentage interest and multiple limited partners.

· The limited partners all had limited liability under Texas law but also provided substantial services to the consulting firm.

· Sirius treated the limited partners’ distributive shares (other than guaranteed payments) as exempt from self-employment tax under Section 1402(a)(13).

· The IRS recharacterized a large portion of those amounts as subject to SE tax, and the Tax Court sided with the IRS using a multi-factor functional test focused on participation and “passive investor” status.

· On appeal, the Fifth Circuit reversed, finding the Tax Court’s functional interpretation inconsistent with the statutory text and historical usage of “limited partner.”

The Court’s Reasoning

· Text and ordinary meaning: The court looked to dictionaries and contemporaneous usage at the time Section 1402(a)(13) was enacted and concluded that “limited partner” was universally understood as a partner whose liability is limited by state limited partnership statutes.

· Administrative materials: The opinion relied on historic SSA and IRS guidance that tied “limited partner” status to limited liability, not to a passive-investor or non-service test.

· Structure of Section 1402: The court noted that where Congress wanted to condition SE tax treatment on the provision of services, it knew how to do so expressly (e.g., in nearby Section 1402(a)(10)), and it did not add such language to Section 1402(a)(13).

· “As such” language: The court read “as such” as limiting the exclusion to the partner’s capacity as a limited partner but not as importing a separate “passivity” or “no services” requirement.

· Rejection of Soroban and similar views: The panel explicitly disapproved the Second Circuit’s Soroban Capital Partners decision and other authorities reading a “passive investor” gloss into “limited partner.”

Practical Implications for Limited Partners and Fund Managers

· Planning clarity in the Fifth Circuit: Within the Fifth Circuit (Texas, Louisiana, Mississippi), partners with limited liability in a state-law limited partnership or LLLP can generally treat their distributive shares as excluded from SE tax, regardless of their level of services, subject to SE tax on guaranteed payments.

· Entity choice for managers: Fund and asset management structures using limited partnerships with LLLP features gain significant comfort that GP and LP interests with limited liability can be planned to minimize SE tax, so long as the state-law limited partnership form and liability protections are respected.

· Guaranteed payments remain exposed: The opinion repeatedly notes that guaranteed payments for services (and any other clearly service-based compensation streams) remain subject to self-employment tax.

· Open questions: Commentators highlight unresolved issues, including whether owners of the general partner entity in an LLLP might themselves be treated as “limited partners” for purposes of the exception and how other circuits (notably the First and Second, which have pending cases) will respond to Sirius.

· Golsen and Tax Court cases: For taxpayers in the Fifth Circuit, the Tax Court will be bound by Sirius under Golsen, while outside circuits the IRS is likely to continue litigating for a functional or Soroban-like approach until the conflict is resolved or guidance is updated.

Illustration: Simple Example

Assume a Texas LLLP with:

· GP entity with a small interest and limited liability,

· Several individual limited partners with limited liability under Texas law, each providing substantial services,

· Distributive shares of partnership income and separate guaranteed payments for services.

Under Sirius in the Fifth Circuit, the distributive shares allocable to the limited partners (and arguably some or all of the GP interest if treated as a limited partner under state law) should qualify for the Section 1402(a)(13) exclusion from SE tax, while guaranteed payments remain subject to SE tax.

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