Reviewed against the Supreme Court’s judgment of 1 July 2026

The Supreme Court’s landmark BlueCrest judgment has put the tax treatment of LLP members firmly back in the spotlight. With another Budget approaching, professional services firms should be asking whether their LLP structures and partner arrangements would stand up to scrutiny.

For more than two decades, the limited liability partnership (LLP) has been a familiar structure for professional services firms. Law firms, accountancy practices, consultants, investment managers and other professional businesses have adopted LLP structures because they combine the flexibility of partnership with the benefit of limited liability.

But the tax treatment of LLP members has been under increasing scrutiny. That scrutiny intensified on 1 July 2026, when the Supreme Court unanimously dismissed BlueCrest Capital Management’s appeal against HMRC, in a case that has been working its way through the tribunals since 2022. Although BlueCrest is an investment management business, the decision is expected to affect a large number of the roughly 50,000 LLPs operating across the professional services and investment sectors, and provides important clarification on when an LLP member should be treated as a self-employed partner and when they should instead be treated as an employee for tax purposes.

For professional services firms, it raises a straightforward but important question: is your LLP partner really a partner for tax purposes? In our work advising LLPs on partner and member arrangements, this is a question we’re increasingly being asked to help firms answer with confidence, rather than assumption.

What is the BlueCrest case about?

When LLPs were introduced in 2000, members were generally treated as partners for tax purposes. This meant that an LLP could provide the limited liability associated with a company while retaining partnership-style tax treatment.

However, the Government became concerned that LLPs could be used to give individuals who were effectively employees the more favourable tax treatment associated with self-employed partners. Following a 2013 consultation, the result was the salaried members rules, introduced in the Finance Act 2014.

These rules determine whether an LLP member should be treated as an employee for income tax and National Insurance purposes. BlueCrest has been the test case for how they apply in practice: the First-tier Tribunal ruled on the case in 2022, the Upper Tribunal upheld that decision in 2023, the Court of Appeal gave further guidance in January 2025, and the Supreme Court has now given the fullest judicial guidance to date. Notably, the Supreme Court has sent the case back to the First-tier Tribunal to reconsider which individual BlueCrest members meet the correct legal test – so this is a clarification of the rules, not a final verdict on every member’s status.

When is an LLP member treated as an employee?

The salaried members rules contain three conditions. An LLP member is treated as a salaried member – and therefore as an employee for tax purposes – if all three conditions are satisfied.

Condition A – disguised salary.

This condition looks at whether at least 80% of a member’s expected remuneration is, in substance, similar to a salary: fixed, varied without reference to the LLP’s overall profits or losses, or not in practice affected by them. The Supreme Court’s judgment considered this condition in detail and rejected BlueCrest’s argument that a discretionary cap linked to overall profits was enough to bring its members’ pay outside Condition A. The point for professional services firms is that simply describing someone as a partner, or paying them through the LLP, does not by itself determine their tax status – the substance of the remuneration arrangement matters.

Condition B – significant influence.

This was the central issue in BlueCrest, and the area where the Supreme Court gave the most significant clarification. HMRC’s own Partnership Manual explains that this condition is intended to reflect the difference between a genuine partner and someone who simply works for the business, and that the starting point is the rights set out in the LLP agreement. The Supreme Court confirmed that influence must be traceable to an identifiable contractual, statutory or other legal source rather than to informal or de facto influence arising from seniority, expertise, reputation or day-to-day operational control. The assessment also has to focus on influence over the LLP as a whole, generally at a strategic rather than operational level, not simply whether someone is senior or important within their own department or client base. A partner with substantial autonomy over their own clients or practice area may not, on this test, have significant influence over the LLP itself.

Condition C – capital contribution.

The third condition looks at whether the member’s capital contribution is less than 25% of their expected disguised salary for the tax year. This was common ground in BlueCrest – the LLP accepted Condition C was met – but capital arrangements remain a live part of the analysis for other firms. HMRC’s guidance confirms it will apply anti-avoidance rules to arrangements under which members increase their capital contributions periodically simply to stay outside this threshold.

A worked example

The interaction between the three conditions is easiest to see side by side.

Sarah is a director at a mid-sized professional services LLP. She’s paid £120,000 a year, agreed at the start of each year and unaffected by whether the firm has a good year or a bad one – so more than 80% of her pay is fixed (Condition A met). She has no vote on firm strategy, budgets or partner appointments; her input is limited to decisions within her own department (Condition B met). Her capital contribution is £10,000, well below 25% of her expected pay (Condition C met). All three conditions are satisfied, so Sarah would be treated as a salaried member – an employee for tax purposes – regardless of the “director” title on her door.

Tom is an equity partner at the same firm. His profit share moves up and down with the firm’s overall results and can fall to nil in a bad year (Condition A not met – his pay isn’t disguised salary). He sits on the management board with a contractual right to vote on strategy, budget approval and partner admissions, set out in the LLP agreement (Condition B not met – his influence has an identifiable legal source and operates at firm-wide level). Because Conditions A and B both fail, Tom is a genuine partner for tax purposes even though his own capital contribution is modest.

Priya is the harder case. As a fixed-share partner and head of the tax department, she has considerable authority over her own team – hiring, client work, internal pricing – and is well known and respected across the firm. But she has no seat on the management board and no contractual voting rights over the LLP’s affairs as a whole. Under the Supreme Court’s narrower reading of Condition B, her operational authority within her department doesn’t count as “significant influence” – that requires influence over the LLP as a whole, traceable to something documented, not informal seniority or reputation. If her pay is also largely fixed, she could be caught by the rules despite her seniority and title – which is close to the scenario BlueCrest was really about. The difference between Tom and Priya isn’t how senior they are; it’s whether their influence is legally documented at LLP level, or exercised only in practice within their own patch.

Why does BlueCrest matter to law and accountancy firms?

It would be easy to dismiss BlueCrest as a dispute involving a large investment management business and a very substantial tax bill. That would be a mistake. The Supreme Court’s decision concerns the application of rules that apply to LLPs generally, and Reuters reported that HMRC said it welcomed the decision and would consider whether its industry guidance needed updating in light of the judgment – a signal that scrutiny of LLP structures more broadly is likely to continue.

That means the judgment should be of interest to accountancy practices, law firms, consultancy businesses, investment management firms, financial services businesses, and other professional services businesses operating through LLPs.

The question for these firms is not necessarily whether they need to change their structure. It is whether their existing arrangements accurately reflect the economic and governance reality of the business.

Partner in name does not necessarily mean partner for tax purposes

Professional services firms have increasingly adopted different categories of partnership: equity partners, fixed-share partners, salaried partners, members, directors, practice heads and department heads. The terminology varies considerably from one firm to another, but tax legislation does not simply follow the label attached to an individual’s position. An individual may be called a partner while having relatively little exposure to the firm’s financial performance and limited involvement in strategic decision-making – precisely the distinction the salaried members rules are concerned with.

BlueCrest should therefore encourage LLPs to look beyond their partnership agreements and consider what actually happens in practice, as the Sarah, Tom and Priya examples above illustrate.

Does your remuneration structure tell the same story as your partnership agreement?

One area firms may wish to examine is how partner remuneration is calculated:

  • Is remuneration genuinely linked to the LLP’s overall profits?
  • Is an individual’s reward effectively fixed?
  • How much discretion does the LLP have over individual remuneration?
  • Does an individual participate meaningfully in profits, including when profits fall?
  • Are drawings simply an advance against an individual’s expected profit share?
  • Are different categories of member treated differently?

There is no single remuneration model that automatically makes someone a genuine partner for tax purposes – the issue is the overall position, as with Sarah and Tom above.

And what about significant influence?

The BlueCrest judgment makes this an especially important area to review, given how narrowly the Supreme Court has defined it. Professional services firms should consider who actually has influence over the LLP’s affairs, and – critically – where that influence comes from:

  • Who makes strategic decisions, and under what legal authority?
  • Who determines budgets and investment?
  • Who has voting rights, and are they set out in the LLP agreement?
  • Who influences recruitment and remuneration at LLP level, not just within a team?
  • Who participates in decisions affecting the direction of the LLP as a whole?

Because the Supreme Court has ruled that only influence with an identifiable legal source counts, firms that rely on a member having significant influence should be able to point to where that influence is documented – not just describe how things work in practice, as the contrast between Tom and Priya shows. HMRC’s own manual notes that it looks at both the written agreement and how the LLP operates in practice, so maintaining clear, contemporaneous records of how decisions are actually made and who holds voting or governance rights is likely to be increasingly important if this position is ever challenged.

The financial consequences can be significant

This is not simply a question of terminology. If an LLP member is caught by the salaried members rules, the consequences can include PAYE and National Insurance obligations, potentially backdated. In BlueCrest, HMRC pursued assessments of around £142 million in income tax and £55 million in National Insurance contributions, taking the total dispute close to £200 million. BlueCrest has since argued publicly that the ruling undermines business certainty in the UK, while HMRC has welcomed the decision as confirming how the rules should be applied. For a professional services firm with dozens or hundreds of members, even a relatively small number of members being reclassified could have significant financial implications – a single Sarah-type reclassification across a whole grade of directors, not just one individual, is where the exposure adds up.

Is another LLP tax raid coming?

There is another reason why LLPs should be paying attention. The BlueCrest judgment comes less than a year after widespread speculation that the Government was considering changes to the tax treatment of LLP members. Ahead of the November 2025 Budget, there was considerable reporting that the Treasury was considering extending employer National Insurance to LLP members – a proposal reportedly aimed at raising substantial additional revenue from professional partnerships, particularly law firms, accountancy practices and investment managers. The Law Society confirmed at the time that it understood the measure was under consideration and campaigned against it. The proposal ultimately did not appear in the 2025 Budget, and the Law Society subsequently confirmed it had been dropped, a decision ICAEW also welcomed.

So is the issue dead? Not necessarily. The next UK Budget is scheduled for 28 October 2026, and there is already speculation about further tax increases and reforms. At present, there is no confirmed Government announcement that a new LLP tax or employer NIC charge on LLP members will be introduced. That distinction is important. But the subject has not disappeared from the tax debate: the 2025 proposal demonstrated that the Treasury was prepared to consider changing the tax treatment of LLP members, and BlueCrest has now highlighted the existing mechanisms through which members can already be treated as employees. The underlying political argument i.e. whether individuals operating through partnerships and LLPs should bear a similar employment tax burden to employees doing economically similar work remains relevant, and the debate is likely to remain one worth watching.

For professional services firms, the sensible response is not to restructure on the basis of Budget speculation. It is to understand the tax position of the existing structure and consider what the impact would be if the rules changed.

The wider question: are LLPs losing their tax advantage?

LLPs were created to provide a combination of limited liability and partnership taxation. But governments have increasingly intervened where they believe LLP structures are being used to obtain tax treatment that does not reflect the economic reality of an individual’s role. The salaried members rules were the first major example, and BlueCrest demonstrates that HMRC is prepared to pursue substantial cases under them. The 2025 Budget speculation showed the Treasury has at least considered going further by changing the NIC treatment of LLP members too.

The LLP itself remains a perfectly legitimate and widely used structure. But firms should not assume that “we are an LLP, therefore our members are self-employed partners” is the end of the tax analysis.

What should professional services firms do now?

There is no need for firms to panic or restructure simply because of BlueCrest. But it would be sensible for LLPs to consider a review of their arrangements.

  1. Review your members. Identify which members could potentially fall within the salaried members rules. Don’t assume the answer is obvious from job title or seniority – as Priya’s case shows, seniority and significant influence are not the same thing.
  2. Review remuneration. Consider how each category of member is rewarded and whether remuneration is genuinely connected to the LLP’s profits.
  3. Review capital. Check members’ capital contributions against their remuneration and the 25% threshold in Condition C.
  4. Review governance. Consider who actually has significant influence over the affairs of the LLP as a whole, and whether that influence is grounded in the LLP agreement or other legal documentation — not just informal seniority.
  5. Document the position. Where a firm relies on a member satisfying one of the conditions, ensure there is contemporaneous evidence supporting that position.
  6. Model the financial impact. Consider what would happen if particular members were treated as employees for tax purposes. Understanding the potential cost now is considerably easier than dealing with an unexpected PAYE or NIC liability later.
  7. Keep an eye on the Budget. The fact that an LLP tax proposal did not appear in the 2025 Budget does not guarantee the issue will never return. With the 28 October 2026 Budget approaching, professional services firms should keep the tax treatment of partnerships and LLPs on their radar.

A changing landscape for professional services firms

The BlueCrest judgment does not mean that LLPs are under threat, and it does not mean that every fixed-share or salaried partner will suddenly be treated as an employee. What it does mean is that the distinction between a genuine partner and someone who is effectively an employee remains firmly on HMRC’s agenda – and that the Supreme Court has now set a much clearer, and narrower, legal test for where that line sits.

For professional services firms, the lesson is perhaps a simple one: don’t just ask what your partnership agreement says. Ask whether the way your LLP operates in practice – and, crucially, what’s documented – supports the tax treatment you are claiming.

If your firm operates as an LLP, now could be a good time to review your members, remuneration arrangements and governance structure – before HMRC, rather than the firm, asks the questions.

If you’d like to discuss how the salaried members rules apply to your LLP, get in touch with Jordan Haran below.