For years, business owners and tax professionals have relied on a specific provision in the federal tax code to protect certain income from self-employment taxes. By designating an owner as a “limited partner,” many assumed they had built an impenetrable shield against these additional tax liabilities. Today, however, that shield is showing significant cracks as the regulatory landscape shifts.
Recent legal developments have dramatically complicated what was once considered a straightforward tax planning strategy. Rulings from the U.S. Tax Court and the Fifth Circuit Court of Appeals have introduced contrasting interpretations regarding when a limited partner’s distributive share of income should be subject to self-employment tax. For partnerships, limited liability companies (LLCs), and other flow-through entities—particularly those where owners play an active role in business operations—this lack of consensus creates a challenging environment of tax uncertainty.
Under general tax rules, a partner's distributive share of partnership income is included in their net earnings from self-employment. However, Internal Revenue Code (IRC) Section 1402(a)(13) provides a crucial exclusion. It states that the distributive share of any item of income or loss of a “limited partner, as such,” is excluded from self-employment tax. The only statutory exception to this exclusion is for guaranteed payments made to the partner in exchange for services actually performed for the partnership.
This exclusion represents substantial financial stakes for business owners. Self-employment tax is generally levied at a rate of 15.3% up to the Social Security wage base, plus Medicare tax and, where applicable, the additional Medicare surtax. For high-earning service providers, successfully claiming limited partner status can lead to dramatic tax savings. Consequently, the central question has become highly contentious: under what precise circumstances is an individual considered a true “limited partner” for self-employment tax purposes?
The conflict over this definition has culminated in two distinct and contrasting judicial approaches, leaving taxpayers caught in the middle of a shifting legal landscape.
In the landmark Soroban Capital Partners case, the U.S. Tax Court took a functional, facts-and-circumstances approach to the issue. The court concluded that the exclusion under Section 1402(a)(13) was originally intended to benefit passive investors rather than active service providers. Rather than accepting the “limited partner” label at face value as written in a partnership agreement, the Tax Court looked directly at the partner’s actual day-to-day activities within the business operations. Under this standard, even if a person is legally classified as a limited partner under state law, they can still face self-employment tax if their participation in the business is substantial and meaningful.
Conversely, the Fifth Circuit Court of Appeals initially took a very different path. In its January 16, 2026, decision in the Sirius Solutions case, the court determined that a limited partner for self-employment tax purposes is defined strictly by state law. Under this initial ruling, if an individual is a state-law limited partner enjoying limited liability, they qualified for the exclusion. This state-law and managerial-role approach explicitly rejected the Tax Court's theory that the exclusion applies strictly to passive investors.
However, the judicial landscape shifted again just seven months later. In the K Alen case, the Fifth Circuit withdrew and restated its January 2026 Sirius Solutions opinion. The court pivoted to a middle-ground standard that examines whether the partner exercises a significant managerial role in operating the business. Under this restated standard, providing services to the entity does not automatically trigger self-employment tax, but engaging in significant managerial and administrative activities can disqualify the partner from the tax code's self-employment tax exception.

Given the current state of legal uncertainty, business owners in Phoenix, Mesa, and across the country cannot rely solely on the “limited partner” label. To assess whether distributive shares are vulnerable to IRS challenges, several practical factors must be evaluated:
Although Section 1402(a)(13) specifically refers to “limited partners,” modern businesses frequently operate as Limited Liability Companies (LLCs), Limited Liability Partnerships (LLPs), or Limited Liability Limited Partnerships (LLLPs) instead of traditional limited partnerships. This structural mismatch complicates the analysis.
While members of these modern entities who function purely as passive investors and avoid management participation are generally exempt from self-employment tax, those who actively provide services face different rules. Members who provide services are typically subject to self-employment tax on both their distributive share income and their guaranteed payments. Consequently, business owners using modern, nontraditional entity structures must exercise extreme caution. The entity’s label does not automatically resolve the self-employment tax question.

The split between judicial jurisdictions means that the rules are applied differently depending on where your business operates.
For businesses operating within the Fifth Circuit—which covers Texas, Louisiana, and Mississippi—the restated Sirius Solutions / K Alain decision serves as the governing precedent. While this standard is more favorable to taxpayers than the Tax Court's strict passive-investor test, it still requires a detailed examination of the partner's actual managerial activities.
Outside of the Fifth Circuit, including here in Arizona and other Western states, the Tax Court’s Soroban approach represents the primary baseline utilized by the IRS during audits. This means taxpayers outside the Fifth Circuit are far more likely to face aggressive challenges from the IRS, which argues that active service providers are ineligible for the Section 1402(a)(13) self-employment tax exclusion.
Because different courts maintain opposing views, taxpayers facing identical situations can experience vastly different tax outcomes based solely on geography. This classic circuit split increases the probability that the United States Supreme Court will eventually have to step in and resolve the issue once and for all.
Until there is uniform national clarity or a definitive Supreme Court ruling, the safest course of action is to assume the IRS will scrutinize any limited partner classification where the owner displays substantial operational activity.
To mitigate this risk, a conservative tax strategy should involve the following proactive steps:
Ultimately, if a partner is actively involved in running the business, the most prudent tax planning assumption is that self-employment tax may apply.
The recent rulings make one thing abundantly clear: “limited partner” is no longer a simple, label-based designation that automatically shields you from self-employment taxes. The Tax Court's intense focus on whether a partner is genuinely passive means that facts, roles, and actual behaviors will always override formal titles.
At New Beginnings One Stop Tax Help in Phoenix and Mesa, AZ, our team—led by Channika Daniels and Vernon C Daniels Jr (Tax Accountant, IRS Enrolled Agent, and Certified Tax Resolution Specialist)—helps self-employed individuals and business owners navigate these complex, evolving rules. Before you treat partnership distributive shares as exempt from self-employment tax, let us help you conduct a thorough, facts-first review of your entity structure, operating agreements, and partner roles to protect your business from costly IRS challenges. Contact our office today to schedule a personalized tax planning consultation.
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