The Fifth Circuit Just Changed the Self-Employment Tax Game for Texas Limited Partners

On January 16, 2026, the Fifth Circuit handed down its decision in Sirius Solutions, L.L.L.P. v. Commissioner, and if you're a business owner in Texas, Louisiana, or Mississippi operating through a limited partnership, this case could save you a significant amount of money. The court rejected the IRS's position that a "limited partner" must be a passive investor to qualify for the self-employment tax exemption under IRC Section 1402(a)(13) and instead held that a limited partner is simply a partner in a limited partnership who has limited liability under state law. Full stop. No activity test. No functional analysis. If you're a limited partner under your state's partnership statute and your liability is limited, your distributive share of partnership income is excluded from self-employment tax.

To understand why this matters, you need to understand the tax at stake. Self-employment tax under SECA is the combined Social Security and Medicare tax that self-employed individuals pay on their net earnings from self-employment. For 2026, the rate is 15.3 percent on the first $168,600 of earnings (12.4 percent for Social Security plus 2.9 percent for Medicare), and 2.9 percent on everything above that threshold, plus an additional 0.9 percent Medicare surtax for high earners above $200,000 (single) or $250,000 (married filing jointly). For a limited partner receiving $500,000 in distributive share income, the difference between being subject to self-employment tax and being exempt from it can easily exceed $30,000 per year. Over a decade, that's $300,000 in tax savings from a single structural decision.

The statute itself is deceptively simple. Section 1402(a)(13) excludes from self-employment tax "the distributive share of any item of income or loss of a limited partner, as such, other than guaranteed payments described in section 707(c)." Congress never defined the term "limited partner" in the statute, and the IRS never finalized regulations defining it either — Treasury proposed regulations in 1997, but Congress imposed a moratorium preventing Treasury from finalizing them, and that moratorium has been renewed repeatedly. The result was a statutory term with no regulatory definition, which is exactly the kind of ambiguity the IRS exploited.

Starting with Soroban Capital Partners LP v. Commissioner in 2023, the Tax Court adopted a "functional analysis" test that looked beyond the partner's state-law status to examine whether the partner behaved like a passive investor. Under Soroban, a limited partner who actively participated in the business — managing investments, making business decisions, meeting with clients — wasn't really a "limited partner, as such" for purposes of the exemption, regardless of what the state partnership statute said. The Tax Court applied this same functional analysis in Denham Capital Management and in Sirius Solutions itself at the trial level. The IRS loved this approach because it allowed them to deny the exemption to virtually any limited partner who did meaningful work for the partnership.

The Fifth Circuit flatly rejected this reasoning. The majority opinion focused on the plain text of the statute and the dictionary definitions of "limited partner" at the time Congress enacted Section 1402(a)(13) in 1977. Every contemporaneous definition the court examined — dictionaries, state statutes, the IRS's own Form 1065 instructions for 40 years — defined "limited partner" by reference to limited liability, not by reference to the partner's activity level. The court also interpreted the phrase "as such" to address the situation where the same person holds both a general partner interest and a limited partner interest in the same partnership: income earned in the capacity of a limited partner is exempt, while income earned in the capacity of a general partner (and all guaranteed payments for services) remains subject to self-employment tax.

The court specifically noted that the Tax Court's functional analysis approach was "unworkable in practice" because limited partners couldn't determine their own tax liability without extensive professional analysis of subjective factors. This echoes Congress's own concern in 1997 when it blocked Treasury's proposed regulations — Congress recognized that a functional definition would create exactly this kind of uncertainty.

So what does this mean practically for Texas business owners? Several things.

First, if you already operate as a state-law limited partnership in Texas, Louisiana, or Mississippi, your limited partners now have a clear basis for excluding their distributive share from self-employment tax. This applies even if those limited partners are actively involved in managing the business — the Fifth Circuit's holding is that activity level is irrelevant. Guaranteed payments for services remain subject to SECA, but the distributive share is exempt.

Second, if you're currently operating as an LLC or an S-corp and you're paying significant self-employment or employment taxes, it may be worth evaluating whether converting to a limited partnership structure makes sense. The Fifth Circuit expressly declined to address whether members of LLCs or LLPs qualify for the limited partner exception — that question remains open. But the court made clear that state-law limited partners in a limited partnership do qualify. For a business with both active and passive owners, a limited partnership structure where the active owners hold both GP and LP interests (with the GP interest receiving guaranteed payments for services and the LP interest receiving exempt distributions) could produce substantial tax savings.

Third, if you previously paid self-employment tax on limited partner distributions — because the IRS asserted you were too active to qualify, or because your CPA took a conservative position after Soroban — you should evaluate whether refund claims are available. The applicable statute of limitations is generally three years from the date the return was filed or two years from the date the tax was paid, whichever is later. For returns filed in 2023 or later, there may still be time, but the window is closing.

An important wrinkle that most commentary hasn't addressed: Sirius Solutions was specifically a limited liability limited partnership, or LLLP, under Delaware law. In an LLLP, even the general partner has limited liability. The Fifth Circuit's opinion defines "limited partner" by limited liability status. This raises an open question about whether the owners of the general partner entity in an LLLP — who themselves have limited liability — might also qualify for the limited partner exception. The court didn't decide this issue, but the logic of the opinion at least opens the door.

The Sirius Solutions decision is binding in the Fifth Circuit, and under the Golsen rule, the Tax Court is now required to follow it for taxpayers whose appeals would lie in the Fifth Circuit — which means Texas, Louisiana, and Mississippi taxpayers. But the story isn't over nationally. The First Circuit heard arguments in Denham Capital Management on February 5, 2026, and Soroban Capital Partners is pending in the Second Circuit. If either of those circuits adopts the Tax Court's functional analysis test, a circuit split would exist, making Supreme Court review significantly more likely.

For Texas practitioners and business owners, the practical takeaway is clear: the Fifth Circuit has given you a bright-line rule that is far more favorable than what existed before. If your entity structure supports it, the self-employment tax savings are real and significant. But guaranteed payments remain exposed, the LLC/LLP question is unanswered, and the national landscape is still developing. Now is the time to review your structure with a tax advisor who understands both the case law and the entity-level planning that makes the exemption work.

It's also worth noting the interplay between this decision and the S-corp reasonable compensation debate. Many small business owners chose S-corp status specifically to split income between salary (subject to employment tax) and distributions (exempt from employment tax). The reasonable compensation doctrine — the subject of ongoing IRS enforcement and cases like Watson v. United States in the Eighth Circuit — creates friction because there's no bright-line salary threshold. Sirius Solutions offers a different path for the right business: a limited partnership structure where the limited partner exemption is now grounded in a clear, liability-based test rather than the subjective reasonable compensation analysis. For a multi-owner service business where one or more owners are active in the business, the LP structure after Sirius may produce a more predictable and defensible result than S-corp reasonable compensation.

The government's deadline to petition for rehearing en banc by the full Fifth Circuit was March 2, 2026. Whether the IRS seeks certiorari to the Supreme Court remains to be seen. In the meantime, if you're in the Fifth Circuit, the law is on your side — and the Tax Court is bound to follow it under Golsen. Don't leave money on the table while you wait for the national picture to clarify.