The Court of Appeal’s judgment in Burlington Loan Management DAC v HMRC [2026] EWCA Civ 461 is one of the most significant international tax decisions of the year. Handed down in April 2026, it clarifies — definitively, for now — when a double tax treaty anti-abuse rule can actually be triggered. HMRC lost. And the implications for CFOs running cross-border structures, managing withholding tax exposures, or operating within PE-backed groups with international debt are substantial.
If your business involves intragroup loans, secondary debt, treasury vehicles in EU or treaty-partner jurisdictions, or you’ve been sitting on structures that HMRC might characterise as “treaty shopping” — this judgment deserves your full attention.
The Case in Brief
The facts arose out of the administration of Lehman Brothers International (Europe) (LBIE). Burlington Loan Management DAC (Burlington), an Irish tax-resident investment company, acquired a debt claim from SICL, a Cayman Islands company in liquidation. The debt was owed by LBIE, a UK-resident entity. Because the principal had already been repaid, Burlington was acquiring the right to receive future interest payments — which, under UK domestic law, would normally be subject to UK withholding tax.
The critical structural point: SICL, as a Cayman resident, had no applicable tax treaty to shelter it from UK withholding tax. Burlington, being Irish-resident, was entitled under Article 12(1) of the UK–Ireland Double Tax Treaty to receive interest beneficially owned by an Irish resident taxed only in Ireland — not in the UK. Burlington factored this treaty benefit into its pricing of the debt acquisition. That was the whole commercial logic.
HMRC’s case was simple: because the transaction was only commercially viable because of the expected treaty relief, one of Burlington’s main purposes must have been “to take advantage of” Article 12(1) — triggering the anti-abuse provision in Article 12(5) of the same treaty and reinstating UK withholding tax.
What the Court Actually Decided
The Court of Appeal dismissed HMRC’s appeal. The central holding is this: “obtaining the benefit of” a treaty provision is not the same as “taking advantage of” it. You can rely on a treaty. You can price a transaction to reflect expected treaty relief. That does not, in itself, make you an abuser of the treaty.
The Court drew a key distinction between motive and purpose:
- Motive concerns the broader commercial reasons why a transaction is attractive — tax outcomes can, entirely legitimately, be part of that.
- Purpose concerns the specific objective the taxpayer seeks to achieve — and that must involve obtaining a benefit contrary to the treaty’s object and purpose for the anti-abuse rule to bite.
The UK–Ireland treaty’s primary objectives include the elimination of double taxation and the promotion of capital movement between contracting states. Burlington — an independent Irish-resident entity that acquired debt on arm’s-length terms — was doing exactly what the treaty was designed to facilitate. Maximising HMRC’s revenue is explicitly not part of a double tax treaty’s object and purpose. The anti-abuse rule did not apply.
For further analysis, Proskauer’s Tax Talks blog has an excellent breakdown, as does Macfarlanes’ commentary on the Lehman litigation.
Why This Matters Beyond the Secondary Debt Market
Burlington arose in the secondary debt market — a somewhat specialist corner of international finance. But the principles it affirms matter across a far wider range of CFO-level situations:
- Intragroup financing structures — treasury companies in Ireland, Luxembourg, the Netherlands, or other treaty-partner jurisdictions regularly benefit from withholding tax exemptions. Burlington confirms this is legitimate, provided the structure reflects genuine commercial activity consistent with the treaty’s aims.
- PE-backed groups — acquisition structures frequently involve holding companies in jurisdictions selected, in part, for their treaty networks. The Court’s clear statement that pricing a deal to reflect treaty benefits is not automatically abusive is reassuring for deal structuring teams.
- Refinancings and debt trading — where creditors in restructurings are trading claims or where banks are offloading distressed debt, Burlington provides comfort that the acquirer’s treaty position can legitimately factor into pricing.
- Cross-border royalty and dividend flows — the reasoning in Burlington applies beyond interest: the same principle governs when anti-abuse provisions in treaty articles covering dividends and royalties can be triggered.
The MLI Complication: Do Not Assume Burlington Covers Your Structure
Here is the critical caveat. The UK–Ireland treaty has since been modified by the OECD Multilateral Instrument (MLI). The “take advantage of” wording in Article 12(5) has been superseded by the MLI’s Principal Purpose Test (PPT), which does not use the same language.
Under the PPT, a treaty benefit can be denied if “it is reasonable to conclude that obtaining that benefit was one of the principal purposes of any arrangement or transaction.” The wording is broader. Burlington’s precise reasoning — centred on the “take advantage” formulation — does not automatically transpose to the PPT. As KPMG’s analysis notes, structures that cleared the old threshold may face renewed scrutiny under the PPT.
For most UK outbound and inbound structures, the relevant question is now whether the PPT applies — and HMRC will continue to argue aggressively in this space. The Burlington principles remain directionally useful (particularly on the distinction between motive and purpose, and the need to assess the treaty’s object and purpose), but they are not a complete answer for MLI-modified treaties.
Ropes & Gray’s commentary and Paul Hastings’ client alert both address this MLI dimension clearly — worth reading if this touches your structure.
HMRC’s Position: Aggressive But Now Bounded
HMRC fought this case through to the Court of Appeal and may yet seek to take it to the Supreme Court. That tells you something: HMRC genuinely believes that where a transaction’s commercial viability depends on treaty relief, the anti-abuse provision should be capable of applying. The Court has now rejected that position — but HMRC will not simply abandon the underlying argument in future cases.
What HMRC can legitimately do — and will continue to do — is examine whether structures are genuine, whether the treaty-resident entity has real substance and beneficial ownership, and whether the arrangements are consistent with the treaties’ objects and purposes. Thin treasury vehicles, back-to-back arrangements, or structures where the only identifiable purpose is withholding tax elimination remain vulnerable. Burlington protects legitimate commercial structures. It does not protect contrivances.
The HMRC Spotlight series on tax avoidance and the GAAR Advisory Panel opinions give a useful sense of the kinds of arrangements HMRC is currently targeting — it is worth checking whether any published opinions are relevant to your sector.
CFO Action Points
- Map your withholding tax exposures now. If your group has intragroup debt, royalty flows, or dividend streams passing through treaty-jurisdiction entities, run a current assessment. Burlington gives comfort, but that comfort needs to be earned by genuine substance in those entities.
- Check which treaty version governs your structure. The MLI has modified most UK treaties. Identify whether the old “take advantage” language or the newer PPT applies to your specific treaty. The legal analysis differs.
- Document beneficial ownership and substance. The Court’s reasoning in Burlington emphasised that Burlington was an independent, Irish-resident entity that acquired debt on arm’s-length terms. If your treasury company is a shelf entity run from elsewhere, do not assume Burlington covers you.
- Review debt acquisition scenarios in PE portfolios. If your PE sponsor is trading debt in or out of group entities — or if refinancing is on the horizon — the Burlington analysis should inform structuring decisions at term sheet stage, not after signing.
- Brief your audit committee. Treaty-based withholding tax positions should be disclosed and supportable. The correct disclosure in your FRS 102 or IFRS tax notes depends on a current, honest assessment of whether those positions would survive HMRC challenge.
The Bigger Picture: Treaty Integrity vs Revenue Maximisation
There is a principled point at the heart of Burlington that CFOs and their tax advisers should understand clearly: double tax treaties exist to allocate taxing rights, not to maximise UK tax revenue. HMRC’s argument — that a transaction shaped by the expectation of treaty relief must be abusive — would, if accepted, have made it impossible to rely on any treaty benefit in cross-border structuring. The Court was right to reject it.
That said, the post-MLI environment is more demanding than it was. The OECD’s BEPS Action 6 guidance on preventing inappropriate treaty benefits underpins the PPT, and HMRC has been clear it will use that tool. The message from Burlington is not “treaty planning is fine, do what you like.” It is “genuine commercial structures with real substance, operated in jurisdictions for real reasons, are not abusive merely because treaty benefits improve the economics.”
That is a defensible position. Make sure yours is too.
Talk to Tanous
If Burlington touches your structures — or if you are not sure whether it does — contact Mark Hendy at Tanous. With three decades of senior finance and tax advisory experience across PE-backed, listed, and privately owned businesses, Tanous helps CFOs navigate exactly these kinds of questions: where does legitimate planning end and where does HMRC risk begin? Let’s make sure your international structures are built to withstand scrutiny.