What the BlueCrest ruling means for the LLP salaried member rules

The ruling, and why it lands hard

On 1 July 2026 the Supreme Court handed down its decision in HMRC v BlueCrest Capital Management (UK) LLP [2026] UKSC 18. The Court unanimously dismissed BlueCrest's appeal, ruled for HMRC, and affirmed the narrow interpretation of the salaried member rules that the Court of Appeal had reached. It then remitted the case to the First-tier Tribunal to apply the clarified tests to the individual members' facts.

The decision is the fullest judicial guidance to date on rules that decide whether a member of a limited liability partnership is taxed as a self-employed partner or as an employee. That distinction is not academic. Where the rules bite, the member is treated as an employee for income tax and National Insurance, the LLP owes Pay As You Earn and employer National Insurance on the remuneration, and the exposure runs backwards over the open years with interest. For the investment management, private equity and professional services firms that built their partner structures on the assumption that senior earners sit outside the rules, this is the moment to test that assumption rather than defend it later.

The salaried member rules, in three conditions

The rules live in sections 863A to 863G of the Income Tax (Trading and Other Income) Act 2005, inserted by the Finance Act 2014 to stop firms taxing what were, in substance, employees as though they were partners. A member is treated as a salaried member, and so as an employee, only where all three of the following conditions are met. Fail any single one and the member is taxed as a partner.

• Condition A, disguised salary. At least 80% of the member's expected reward for their services is disguised salary: an amount that is fixed, or varied without reference to the overall profits or losses of the LLP, or in practice not affected by them.
• Condition B, significant influence. The member does not have significant influence over the affairs of the LLP.
• Condition C, capital contribution. The member's capital contribution is less than 25% of their disguised salary.

In BlueCrest, Condition C was common ground and met for the UK LLP members, so the appeal turned on Conditions A and B. That is why the judgment matters so widely: it is precisely those two conditions that most firms have leaned on to argue their partners are genuine partners.

Condition B: significant influence is a legal test, not a commercial one

The heart of the case is Condition B, and the heart of Condition B is the meaning of significant influence. BlueCrest's portfolio managers ran substantial books and were plainly important to the firm's profitability. The argument was that this commercial weight gave them significant influence, taking them outside the rules.

The Supreme Court rejected that reasoning. It held that the influence which matters must be over the affairs of the LLP as a whole, and must derive from the legally enforceable rights and duties of the members and the LLP, rather than from commercial importance or reputation. The enquiry is first whether the influence comes from those legal rights and duties, and only then whether that legally grounded influence is significant. Operational responsibility for part of the business, however large and however profitable, is not the same as influence over the strategic affairs of the firm, and it does not satisfy the condition.

The practical effect is blunt. The star trader who runs the biggest desk, but who has no legally enforceable say in how the firm as a whole is run, does not have significant influence for these purposes. The commonest informal defence to the rules has been narrowed to the point of failure.

Condition A: disguised salary and the profit cap

Condition A ran the same way. The test asks whether at least 80% of the member's expected remuneration is disguised salary, meaning fixed, or varied without reference to the LLP's overall profits, or not in practice affected by them. The Court was content that BlueCrest's members received disguised salary on the facts as found.

The point worth carrying away is about profit dependence that is more apparent than real. A remuneration arrangement that is framed as a profit share, but that is subject to a firm-wide cap that is not realistically reached, or that is not in practice moved by the overall results of the LLP, can still be disguised salary. Labelling a fixed reward as variable does not make it variable. If the intention is to fail Condition A, the profit dependence has to be genuine and has to bite.

The condition that still works: capital

Against two conditions that the courts have now tightened, Condition C stands out as the one that remains mechanical and within a firm's control. A member whose capital contribution is at least 25% of their disguised salary fails Condition C, and so falls outside the rules regardless of the analysis under A and B.

This is why, in practice, the capital route is the most reliable lever for firms that want certainty. It is arithmetic rather than argument. It carries its own commercial and regulatory considerations, the contribution has to be real and at risk, and it should never be treated as a paper exercise, but it does not depend on persuading a tribunal about the texture of a member's influence.

What this changes for LLPs now

Read together, BlueCrest removes the comfortable middle ground. The position that a highly paid member is safe because they are commercially important, or because their remuneration is loosely tied to performance, no longer holds. Three routes out of the rules survive, and each has to be built deliberately:

• Genuine profit dependence under Condition A. Remuneration that is materially and actually affected by the overall profits and losses of the LLP, not a fixed sum wearing the language of a profit share.
• Real legal influence under Condition B. Influence over the affairs of the LLP as a whole, grounded in the members' legally enforceable rights and duties, such as a genuine seat and vote in the firm's strategic governance, not a job title.
• Capital under Condition C. A capital contribution of at least 25% of disguised salary, real and at risk.

For an internationally mobile member the classification interacts with residence, and the analysis of where the member is taxed at all runs through the UK Statutory Residence Test before the salaried member question is even reached. But for a UK-resident member of a UK LLP, the BlueCrest tests apply on their own terms.

What to do now

The work is a governance and documentation exercise, and it is better done before an enquiry than during one. The sensible sequence is to read the LLP deed and the remuneration arrangements against the clarified tests, member by member, and to record the basis on which each member is treated as a partner.

Firms should identify which members are currently relied upon to fail Condition B through influence, and test whether that influence is legal or merely commercial. Where it is merely commercial, the classification needs a different footing, whether through genuine profit dependence, a real governance role, or capital. The documentation matters as much as the substance, because the member's status has to be defensible on the arrangements as they actually operate, not as they are described.

The salaried member rules were always a test of substance over labels. BlueCrest has confirmed which labels no longer work, and has left the firms that relied on them holding a classification they can no longer assume.

Frequently asked questions

What did the Supreme Court decide in BlueCrest?

On 1 July 2026 the Supreme Court unanimously dismissed BlueCrest's appeal in HMRC v BlueCrest Capital Management (UK) LLP [2026] UKSC 18, ruling for HMRC and affirming a narrow interpretation of the significant influence test in the salaried member rules. It clarified the law and remitted the case to the First-tier Tribunal to apply the tests to the members' facts.

What are the salaried member rules?

The salaried member rules in sections 863A to 863G ITTOIA 2005, introduced by the Finance Act 2014, treat a member of an LLP as an employee for income tax and National Insurance where three conditions are all met. Where they apply, the LLP must operate Pay As You Earn and pay employer National Insurance on the member's remuneration.

What is Condition B, the significant influence test?

Condition B is met, so a member is potentially a salaried member, where the member does not have significant influence over the affairs of the LLP. BlueCrest confirmed that this influence must be over the LLP as a whole and must derive from the members' legally enforceable rights and duties, not from commercial importance.

Does running a profitable desk give a member significant influence?

No. The Supreme Court held that operational responsibility for part of the business, however large or profitable, is not significant influence for these purposes. Influence must come from legally enforceable rights over the strategic affairs of the LLP as a whole, so a star earner without such rights does not satisfy the test on that basis.

What is Condition A, the disguised salary test?

Condition A is met where at least 80% of a member's expected remuneration is disguised salary, meaning it is fixed, varied without reference to the overall profits or losses of the LLP, or not in practice affected by them. A profit share subject to a firm-wide cap that is not realistically reached can still be disguised salary.

How can an LLP member stay outside the salaried member rules?

A member falls outside the rules by failing any one of the three conditions: by having genuine profit-dependent remuneration under Condition A, by having real legal influence over the LLP as a whole under Condition B, or by making a capital contribution of at least 25% of disguised salary under Condition C. After BlueCrest, the capital route is the most mechanical and certain.

What are the consequences if a member is a salaried member?

A salaried member is taxed as an employee, so the LLP must operate Pay As You Earn on their remuneration and account for employer National Insurance, and the members are brought within the employment-related securities rules. Where past treatment was wrong, the exposure runs back over the open years with interest.

What should LLPs do after the BlueCrest ruling?

LLPs should review their deed and remuneration arrangements against the clarified tests, member by member, and document the basis on which each member is treated as a partner. Where a member's partner status rested on commercial influence, that footing needs to change to genuine profit dependence, a real governance role, or capital, and the position must be defensible on how the arrangements actually operate.