The UK Supreme Court has ruled against BlueCrest Capital Management (UK) LLP, confirming that members of a Limited Liability Partnership (LLP) must possess legally enforceable rights to “significant influence” to avoid being taxed as employees. In HMRC v. BlueCrest Capital Management (UK) LLP [2026] UKSC 18, the court clarified that day-to-day operational duties—even those involving high-value investment decisions—do not satisfy the “significant influence” test required to bypass salaried member tax rules.
How does the Supreme Court define “significant influence”?
According to the Supreme Court’s unanimous judgment, “significant influence” under Condition B requires high-level or strategic decision-making authority over the LLP’s affairs as a whole. The court rejected the notion that influence can be purely de facto; instead, it must be rooted in the formal rights and duties set out in the LLP agreement. While the court allowed that such authority can be delegated through a governance framework or implied by common law, the source of that power must be traceable back to the LLP agreement itself. Mere operational responsibility, regardless of the financial scale of the trades, is insufficient to meet this threshold.
Why did the court reject BlueCrest’s argument on “disguised salary”?
The Supreme Court found that most members’ remuneration met the criteria for “disguised salary” under Condition A. BlueCrest had argued that because their discretionary allocations were subject to an overall profit cap, the payments were linked to the LLP’s financial performance. The court dismissed this, noting that the allocations were primarily driven by individual portfolio performance rather than the firm’s collective success. This ruling establishes that for remuneration to fall outside the “disguised salary” definition, there must be a genuine, substantial connection between a member’s pay and the overall profitability of the partnership.
What does this mean for current LLP governance?
LLPs now face a mandatory reassessment of their members’ tax status. Because the Supreme Court emphasized the importance of the LLP agreement, firms must verify that the roles and responsibilities of their members are clearly defined and legally supported. If an LLP seeks to amend its governance to clarify these roles, it must remain mindful of the Targeted Anti-Avoidance Rule (TAAR). HMRC is expected to provide updated guidance following this decision, particularly regarding how Condition B applies to modern investment structures.
Frequently Asked Questions
Does managing high-value portfolios count as significant influence?
No. The Supreme Court specifically stated that day-to-day operational responsibilities, even those involving significant financial assets, do not constitute “significant influence” unless they involve high-level strategic control of the LLP.
Can influence be implied if it is not explicitly written in the LLP agreement?
Yes, but with strict limits. The court clarified that influence can be derived from terms implied into the agreement under common law or equitable principles, or via delegated authority, provided that the source of that power can be traced back to the LLP agreement.
What should LLPs do immediately after this judgment?
Firms should review their current LLP agreements and remuneration structures. Specifically, they must document the legal basis for why any member is treated as a partner rather than an employee, ensuring that the “significant influence” criteria are clearly supported by the governance documents.
Are you concerned about how the BlueCrest ruling affects your firm’s tax standing? Contact our tax advisory team to discuss your LLP governance arrangements or subscribe to our newsletter for ongoing updates on HMRC regulatory changes.
