For many years, business owners and their tax advisors have relied on a specific exception in the Internal Revenue Code to shield business income from self-employment taxes. By utilizing a "limited partner" designation, many believed they had a secure barrier against these extra tax liabilities. However, that once-clear strategy has become significantly more complex and uncertain in today's regulatory environment.
Recent judicial decisions from both the Tax Court and the Fifth Circuit Court of Appeals have introduced highly contrasting views on when a limited partner's distributive share of income should actually be subject to self-employment tax. This evolving legal landscape has created a wave of uncertainty for partnerships, limited liability companies (LLCs), and other flow-through entities—particularly those where the owners actively perform services for the business.
To understand the gravity of these recent legal developments, we must look at how partnership income is normally taxed. As a general rule, a partner's distributive share of partnership income is included in their net earnings from self-employment. This means the income is subject to self-employment tax, which typically applies at a 15.3% rate up to the Social Security wage base, plus Medicare tax and potentially an additional Medicare surtax. For any business owner, this represents a substantial financial obligation.
However, Internal Revenue Code Section 1402(a)(13) provides a crucial carve-out. It excludes "the distributive share of any item of income or loss of a limited partner, as such" from self-employment taxes. The only exception written into this statute is for guaranteed payments made to the partner for services they actually perform. For decades, this exclusion has been a cornerstone of tax planning, delivering significant tax savings to those structured as limited partners.
The current controversy centers on a deceptively simple question: Who actually qualifies as a "limited partner" for self-employment tax purposes? While the term seems straightforward, the courts have recently struggled to define it, leading to two entirely different legal tests.

The current confusion is driven by a stark split in how different courts analyze the definition of a limited partner.
In the landmark Soroban Capital Partners case, the Tax Court adopted a functional approach to the issue. The court concluded that the exception under Section 1402(a)(13) was originally intended to protect passive investors, not individuals who are actively providing services to the business. Under this functional analysis, the court looks entirely past the state-law label on the partnership agreement. Instead, it examines what the partner actually does on a day-to-day basis. If the facts show that a partner participates meaningfully in the operations of the business, they will be subject to self-employment tax on their distributive share, regardless of their official "limited partner" title.
The Fifth Circuit Court of Appeals initially took an entirely different path. In its decision on January 16, 2026, in the Sirius Solutions case, the court held that a limited partner for self-employment tax purposes is strictly defined by state law. If an individual is a limited partner under state law and enjoys limited liability, they should qualify for the exception. This ruling flatly rejected the Tax Court's passive-investor-only theory, offering a sigh of relief to many taxpayers.
However, that relief was short-lived. Just seven months later, in the K Alen case, the Fifth Circuit withdrew and restated its January 2026 opinion. In this revised stance, the court shifted to a middle-ground standard. Rather than focusing solely on state-law status or adopting the Tax Court's strict active-vs-passive test, the Fifth Circuit's new standard looks closely at whether the partner plays a significant managerial role in running the business. Under this middle-ground approach, simply performing services does not automatically trigger self-employment tax, but holding significant management authority can disqualify a partner from the self-employment tax exception.
With the legal landscape in flux, business owners can no longer rely on labels alone. To assess your actual tax exposure, you must look closely at the operational and structural facts of your business. Several specific factors are now highly critical:

While the language of Section 1402(a)(13) specifically refers to "limited partners," modern businesses frequently utilize alternative structures such as Limited Liability Companies (LLCs), Limited Liability Partnerships (LLPs), and Limited Liability Limited Partnerships (LLLPs). This creates an extra layer of complexity.
In these modern entities, members who function purely as passive investors and have no role in management are generally exempt from self-employment taxes. However, members who actively provide services to the business are typically subject to self-employment tax on both their distributive share of income and any guaranteed payments. Because of this, small business owners utilizing LLCs and other non-traditional partnership structures must exercise extreme caution. You cannot assume that your entity's structure automatically grants you the self-employment tax exclusion.
Because different courts have issued conflicting rulings, where your business is located now plays a major role in your tax positioning.
Until there is uniform nationwide clarity on this issue, taking a proactive and conservative approach is the safest way to safeguard your business. We recommend that business owners take several concrete steps:
Ultimately, if a partner is actively involved in running the business, the safest and most prudent assumption is that self-employment tax may apply to their share of the earnings.
The era of relying on the "limited partner" label as an automatic shield against self-employment tax is over. The courts and the IRS have shifted their focus from formal titles to operational realities—analyzing whether a partner is a truly passive investor or an active participant in the business.
For business owners, navigating this fragmented tax environment requires a careful, facts-first review of your roles, authority, and overall compensation structures. At Christiansen Accounting, our team of seven dedicated professionals is here to help you evaluate your structures, mitigate audit risks, and implement robust tax planning strategies. Contact our California office today to schedule a consultation and ensure your business remains compliant and protected.
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