HMRC’s transfer pricing yield nearly doubled to £3.39 billion in a single year. A once-in-a-generation legislative reform took effect on 1 January 2026. The Court of Justice of the European Union (CJEU) has ordered €14 billion recovery from Apple. If you have cross-border related-party transactions and UK operations, this is the moment to act, not after an enquiry has been opened.
Transfer pricing sits at the intersection of commercial reality and fiscal scrutiny. It governs the prices charged between connected companies for goods, services, finance, and intellectual property across borders. Get it wrong, or fail to document it robustly, and you face not just adjustments and penalties from HMRC, but the prospect of protracted, costly litigation before the First-tier Tribunal, the Upper Tribunal, and beyond.
UK enforcement landscape: HMRC’s intensifying focus
Transfer pricing has been HMRC’s highest-yielding compliance activity for several years, but the latest statistics mark a step change.
According to figures published by HMRC in March 2026, the transfer pricing yield for 2024-25 was £3.387 billion, almost double the £1.786 billion recovered in the prior year. That is not a statistical anomaly. It is the product of sustained investment in specialist resources, increasingly sophisticated data analysis, and a clear policy direction from government to close the international tax gap.
The average time to settle a transfer pricing enquiry is now 41 months, up from 33 months the previous year. Longer enquiries reflect greater complexity and a more assertive HMRC approach: in-depth functional analyses, detailed challenges to intercompany agreements, and sustained scrutiny of financing arrangements and IP ownership.
HMRC has also announced plans to hire 5,000 additional compliance officers, with VAT, employment tax, and transfer pricing as declared priorities.
The picture, in short, is of an authority better-resourced, more technically expert, and more willing to litigate than at any previous point.
The 2026 reform package: the most significant changes since 2004
The Finance (No. 2) Act 2025-26 introduced the most material overhaul of UK transfer pricing rules since 2004. The principal changes took effect for accounting periods commencing on or after 1 January 2026. Businesses need to understand what has changed and, critically, where their existing positions may no longer be defensible.
The combination of a broader participation condition, tighter IP and financing standards, and new mandatory reporting creates significant exposure for groups that have treated transfer pricing as a year-end compliance exercise. The time to review existing structures and documentation is now, before HMRC’s analytical tools identify the gap for you.
The EU dimension: Apple, arm’s length, and state aid
Although the UK has left the European Union, the jurisprudence of the CJEU remains highly instructive, both for UK businesses with EU group structures and for understanding the international direction of arm’s length principal analysis.
The definitive ruling on transfer pricing and state aid
Commission v Ireland and Others (Case C-465/20 P) Apple Case
The Grand Chamber of the CJEU overturned the General Court’s 2020 ruling and confirmed that Ireland’s tax rulings to Apple Sales International and Apple Operations Europe constituted unlawful state aid worth over €13 billion. The Court found that the Irish branches of the two Apple entities performed the functions and assumed the risks associated with Apple’s IP and that the profits derived from those IP rights should therefore have been allocated to Ireland for tax purposes.
The profit allocation methods approved by the Irish tax authorities failed to apply the arm’s length principle and conferred a selective advantage in breach of Article 107(1) TFEU.
The CJEU’s analysis yields several principles of direct relevance to UK transfer pricing disputes:
- Substance is paramount. The allocation of profits must follow the functions actually performed and risks actually assumed not contractual or structural arrangements that diverge from operational reality.
- The OECD Authorised Approach applies. The CJEU accepted the use of the Authorised OECD Approach as a benchmark for assessing whether profit allocations comply with the arm’s length principle, even in the absence of an explicit domestic legislative provision incorporating it.
- Functional analysis must be granular. The comparison must be drawn between the branch and the head office, not between the branch and other group entities. This seemingly technical distinction had multi-billion euro consequences.
- Documentation of decision-making is essential. The case turned in significant part on the absence of adequate evidence that Apple’s head offices exercised genuine control over the IP. Taxpayers must be able to demonstrate, not merely assert, that functions, assets, and risks are located where they claim.
The Apple decision is also likely to embolden the European Commission in pending investigations.
Pillar two: the new global floor
Pillar Two, the OECD global minimum tax, is now in force in the UK. In-scope December year-end groups must make their first UK filings and payments by 30 June 2026. Where transfer pricing adjustments reduce UK taxable profits below the 15% effective rate threshold, top-up taxes will apply. Transfer pricing disputes and Pillar Two compliance are no longer separate matters: an enquiry that results in a downward UK adjustment may simultaneously trigger Pillar Two liability in another jurisdiction, and vice versa. Businesses must model these interactions before adopting a litigation position.
What this means: practical steps for businesses
The combination of record HMRC enforcement activity, a transformed legislative framework, and landmark international jurisprudence makes 2026 the most consequential year for UK transfer pricing compliance in a generation. The following represent the minimum steps any group with UK cross-border activity should take:
- Scope review. Assess whether the 2026 participation condition changes bring previously exempt entities or transactions into scope. The answer may surprise you.
- Documentation audit. Transfer pricing documentation must be complete and available at the time of filing, not assembled in response to an enquiry. HMRC will presume carelessness where it is lacking, extending the limitation period to six years and increasing minimum penalties to 15%.
- Financing and guarantees. UK rules now closely follow OECD guidance on financial transactions. Debt capacity analysis and guarantee fee pricing must be grounded in robust economic evidence.
- IP structures. Post-Apple, any group IP structure must be supportable by contemporaneous evidence of where the relevant functions were actually performed. Contractual arrangements that diverge from operational reality are acutely vulnerable.
- UTPP readiness. Review any historic DPT-risk analysis. The UTPP regime preserves the policy reach of DPT within the corporation tax framework, historical structures do not receive a free pass.
- ICTS preparation. The new International Controlled Transactions Schedule filing requirement takes effect from 1 January 2027. Groups should begin assembling the transactional data now, before it becomes a compliance emergency.
- Pillar Two interaction. Model the interaction between transfer pricing positions and your Pillar Two effective tax rate before committing to a litigation strategy.
If HMRC has opened an enquiry, or you are anticipating one, early engagement of specialist transfer pricing solicitors is essential. The procedural choices made in the early stages of an enquiry, how information requests are responded to, what documents are disclosed, whether to seek an Advance Pricing Agreement or Mutual Agreement Procedure can determine the outcome of any subsequent litigation.
How we can help
W Legal’s tax litigation practice advises businesses, directors, and their advisers on the full range of contentious transfer pricing matters from initial HMRC information requests to Upper Tribunal and Court of Appeal proceedings. Our work encompasses:
- Strategic advice on responding to HMRC transfer pricing enquiries and investigations
- Representation in First-tier and Upper Tribunal proceedings
- Judicial review of HMRC decisions and assessments
- Privilege strategy and document management in complex multi-party disputes
