The U.S. Court of Appeals for the Fifth Circuit just handed taxpayers a major win in the ongoing battle over self-employment taxes for limited partners – and the implications could be substantial for partnerships across multiple industries.

In Sirius Solutions, the Fifth Circuit rejected the Tax Court’s approach to determining who qualifies for the limited partner exception from self-employment tax. For years, the Tax Court had required partners to be “passive investors” to claim the exemption under Section 1402(a)(13). The Fifth Circuit disagreed, holding that if you’re a partner in a limited partnership with limited liability under state law, you qualify. No need to analyze your day-to-day involvement in the business.

This is the first appellate court decision on this issue, and it directly contradicts several recent Tax Court rulings.

Why It Matters

Self-employment tax runs 15.3% on earnings up to the Social Security wage base, plus additional Medicare taxes beyond that. For limited partners receiving distributive share allocations (other than guaranteed payments) in profitable firms, this decision could eliminate or dramatically reduce annual tax obligations of the partners. While the decision involved a consulting firm, the court’s reasoning appears to apply broadly to other businesses organized as limited partnerships, including investment managers and professional services firms.

The court also noted – without deciding – that its focus on limited liability rather than legal labels could have implications for LLCs and LLPs, though those structures have historically been denied the exception.

What to Consider

This decision is binding in the Fifth Circuit (Texas, Louisiana, Mississippi) but creates uncertainty elsewhere. Two similar cases are pending in the First and Second Circuits; how those courts rule will shape the national landscape.

  • If you operate in the Fifth Circuit: partnerships currently treating limited partners as subject to self-employment tax may want to reassess that position.
  • If you’re outside the Fifth Circuit: protective refund claims could preserve future benefits if other appellate courts follow this reasoning.
  • For LLCs and LLPs: this decision suggests new arguments worth exploring, even though the court didn’t rule directly on these entity types.

The tax treatment of partnership income is evolving quickly. If you’d like to discuss how this ruling might affect your situation, reach out to your WilliamsMarston advisor.

This alert is for general information only and does not constitute tax advice