BlueCrest Supreme Court judgment — what LLPs need to know about the salaried member rules

The UK Supreme Court's landmark judgment in *HMRC v BlueCrest Capital Management (UK) LLP* [2026] UKSC 18 has significantly clarified the application of the "salaried member rules" for Limited Liability Partnerships (LLPs). The Court dismissed BlueCrest's appeal, endorsing a narrow interpretation of the "significant influence" test under Condition B of the rules. This decision confirms that influence must derive from legally enforceable rights and duties within the LLP's governance framework, rather than informal or de facto commercial importance. Practitioners must now critically review LLP agreements and member roles to ensure compliance, as the ruling tightens the criteria for members to be treated as self-employed for tax purposes, with substantial implications for employer National Insurance Contributions.

The landscape for Limited Liability Partnerships (LLPs) in the United Kingdom has been significantly reshaped by the Supreme Court's recent decision in *HMRC v BlueCrest Capital Management (UK) LLP* [2026] UKSC 18. This long-awaited judgment provides crucial clarity on the contentious "salaried member rules," which determine whether an LLP member is taxed as a self-employed partner or, instead, reclassified as an employee. The ruling is particularly impactful for professional services firms and investment management LLPs, where the distinction carries substantial financial consequences, primarily concerning employer National Insurance Contributions (NICs).

At the heart of the *BlueCrest* case was the interpretation of Condition B of the salaried member rules, specifically what constitutes "significant influence over the affairs of the partnership." The Supreme Court's unanimous dismissal of BlueCrest's appeal has affirmed a narrower, more legalistic approach to this test than previously applied by lower tribunals. This article will delve into the statutory framework, analyse the Supreme Court's reasoning, and outline the critical implications for LLPs and their members, guiding practitioners on necessary adjustments to their governance and remuneration structures.

Limited Liability Partnerships, introduced by the Limited Liability Partnerships Act 2000, are hybrid business vehicles that combine features of traditional partnerships and limited companies. An LLP possesses a separate legal personality from its members, offering its members limited liability akin to shareholders in a company. However, for tax purposes, LLP members are generally treated as self-employed partners, meaning the LLP itself does not pay tax, but profits are apportioned to members who then pay tax on their shares.

This advantageous tax treatment, particularly the avoidance of employer NICs, led to concerns by HM Revenue & Customs (HMRC) regarding "disguised employment" relationships. To address this, the "salaried member rules" were introduced in 2014 through the Finance Act 2014, inserting sections 863A to 863G into the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005). These anti-avoidance rules stipulate that an individual member of an LLP will be treated as an employee for tax purposes if all three of the following conditions are met:

* **Condition A:** It is reasonable to expect that at least 80% of the individual's total remuneration is "disguised salary" (i.e., fixed, or variable without reference to the LLP's overall profits or losses, or not in practice affected by them). * **Condition B:** The mutual rights and duties of the members of the LLP do not give the individual significant influence over the affairs of the partnership. * **Condition C:** The individual's capital contribution to the LLP is less than 25% of their expected "disguised salary" for the tax year.

If any one of these conditions is not met, the member remains taxed as self-employed. The *BlueCrest* litigation primarily focused on Conditions A and B, with Condition B being the central point of contention at the Supreme Court.

The Supreme Court's decision in *HMRC v BlueCrest Capital Management (UK) LLP* [2026] UKSC 18 delivered a definitive, albeit narrow, interpretation of Condition B, which states that the mutual rights and duties of the members must not give the individual significant influence over the affairs of the partnership. Prior to the Court of Appeal's intervention, lower tribunals, and even HMRC's initial guidance, had often considered "de facto" influence – influence arising from a member's commercial importance, expertise, or operational responsibilities – as sufficient to satisfy the "significant influence" test.

However, the Supreme Court, affirming the Court of Appeal's stance, unequivocally rejected this broader interpretation. It held that for influence to be "significant" under Condition B, it must derive from, and be traceable back to, the *legally enforceable mutual rights and duties* of the members as conferred by the statutory and contractual framework governing the LLP's operation, primarily the LLP agreement. This means that informal influence, however substantial in practice, or influence arising from a member's performance or client relationships, will not, by itself, be enough to prevent Condition B from being met.

Furthermore, the Court clarified that "significant influence" must be over the *affairs of the LLP as a whole*, rather than merely over a specific part of the business, even if that part is crucial to the LLP's success. This implies a focus on strategic, top-level decision-making and governance, rather than day-to-day operational responsibilities or high-value investment decisions within a specific desk or portfolio. The Supreme Court observed that influence does not equate to control, and a member can have qualifying influence even if subject to veto rights or reserved powers.

Regarding Condition A, which concerns "disguised salary," the Supreme Court also dismissed BlueCrest's appeal. It confirmed that remuneration primarily linked to an individual's own performance can constitute "disguised salary," even if the total amount available for allocation is theoretically subject to an overall LLP profits cap that was never reached in practice. The case has now been remitted back to the First-tier Tribunal to apply the clarified legal tests to the specific facts of BlueCrest's members. This judgment effectively narrows the scope for LLPs to argue that their members are not salaried members by failing Condition B, aligning with HMRC's longstanding, albeit previously challenged, view.

The Supreme Court's judgment in *BlueCrest* represents a pivotal moment for UK LLPs, particularly those in the investment management and professional services sectors. The narrow interpretation of "significant influence" under Condition B means that LLPs can no longer rely on informal or de facto influence, however commercially vital, to demonstrate that a member is not a salaried member for tax purposes. The influence must be clearly rooted in the legally enforceable rights and duties outlined in the LLP agreement and must pertain to the strategic affairs of the LLP as a whole.

Practitioners advising LLPs must urgently review their existing LLP agreements and governance structures. It is crucial to ensure that any member intended to be treated as self-employed for tax purposes genuinely satisfies at least one of the three conditions, with particular scrutiny now required for Condition B. This may necessitate amendments to LLP agreements to explicitly grant strategic influence to members, or a re-evaluation of remuneration structures to ensure Condition A is not met, or capital contributions to satisfy Condition C. Failure to comply could result in significant retrospective tax liabilities, including substantial employer NICs, which currently stand at 15%. The *BlueCrest* decision underscores the importance of robust, legally sound arrangements that reflect the true nature of member relationships within an LLP.