Fifth Circuit reverses ruling on limited partner tax exception

The U.S. Court of Appeals for the Fifth Circuit has reversed its previous stance regarding the self-employment tax exception for limited partners. In a substitute opinion issued on August 12, 2026, in the case K Alain LLLP v. Commissioner, the court withdrew its January 2026 ruling in Sirius Solutions L.L.L.P. v. Commissioner.

The previous January decision had held that state-law limited liability status was sufficient for a partner to qualify for the self-employment tax exclusion under IRC §1402(a)(13). The new ruling abandons this broad state-law approach in favor of a management-based standard. Under the substitute opinion, a limited partner is defined as someone who plays “no significant role in managing or running a business.”

This shift means that state-law status alone no longer guarantees the tax exclusion; instead, courts must evaluate the partner’s actual involvement. While the court did not fully adopt the Tax Court’s passive-investor test, it established a new distinction based on managerial versus non-managerial activity. This change creates new factual questions regarding when a partner’s participation becomes a “significant” role in business management.