GAAR and Principal Purpose Test: Tax Anti-Abuse Rules

Where GAAR and PPT Came From

The idea of general anti-avoidance rules predates BEPS itself. Continental systems have long known the doctrine of abuse of rights, and English courts—the Ramsay line, which allowed looking at a transaction as a whole, beyond individual formal steps. Over time, many states enshrined this logic in law as a statutory GAAR. In parallel, the problem of treaty shopping grew: a company would be established in a country with a favorable tax treaty solely to channel dividends, interest, or royalties through it and obtain a reduced withholding rate at source.

The response came in the form of the BEPS project of 2013–2015. Its Action 6 declared the prevention of treaty abuse one of four minimum standards, mandatory for all participants in the Inclusive Framework. The rule was delivered through the MLI—a multilateral instrument that amends multiple bilateral treaties with a single document; it was opened for signature on 31 December 2016, first signed on 7 June 2017 and entered into force on July 1, 2018. This created a two-tier structure: domestic GAAR counteracts tax advantages under national law; a treaty PPT limits benefits under the relevant agreement. The OECD had named the underlying problem long before BEPS: its 1986 report on conduit companies already described shell companies whose sole function was to pass income through themselves and strip withholding tax at source; no systemic response followed at the time.

Concept

BEPS strengthened the international response to treaty abuse, alongside anti-avoidance doctrines and domestic rules that already existed. Formal compliance remains necessary but may not determine the result where the applicable law permits an abuse analysis. This article distinguishes national GAARs, treaty PPT and the EU directive cases used to illustrate related questions.

GAAR: General Rule

GAAR (general anti-avoidance rule) is a national rule for counteracting abusive tax advantages even where individual technical provisions appear to be satisfied. Its purpose threshold, commercial exceptions, abuse requirement and remedies differ by jurisdiction. Article 6 of ATAD establishes a minimum corporate-tax standard for the EU, rather than an identical national GAAR in every Member State. The United Kingdom has its own statutory rule since 2013. A successful GAAR challenge adjusts tax consequences under the applicable law; it does not automatically invalidate the entire transaction.

PPT: Treaty Test

PPT (principal purpose test) concerns treaty benefits. Under MLI Article 7(1), the first question is whether, considering all relevant facts, it is reasonable to conclude that obtaining the benefit was one of the principal purposes of an arrangement or transaction. Even then, the benefit remains available if granting it is established to accord with the object and purpose of the relevant treaty provisions. A tax purpose alone is therefore not the complete test. The MLI entered into force on 1 July 2018; whether its PPT governs a particular payment depends on the treaty pair and applicable dates.

How the MLI Delivers the PPT to Treaties

The MLI operates alongside the bilateral treaty. Both parties must identify the agreement as covered, and the applicable provisions depend on their notifications, reservations and the MLI compatibility clauses. Check entry into force and entry into effect for the relevant tax and period separately. A reservation does not always mean that there is no PPT: an equivalent clause may already appear in the bilateral treaty or a protocol. Matching is a legal reconciliation of those instruments, not a requirement that every notification be identical.

Coverage is wide but not universal: more than a hundred jurisdictions have signed the convention and roughly two thousand bilateral treaties have been notified under it, with the first effects running from 1 January 2019. Both counters move with each ratification, so the status of a particular pair of countries is checked not against a figure but in the OECD matching database.

The Action 6 minimum standard is not closed by the PPT alone. A treaty must carry a preamble statement that it is not intended to create opportunities for non-taxation, plus one of the protective mechanisms. LOB (limitation on benefits) is the objective test: the benefit is available only to qualified persons under formal criteria — sufficient connection to the state of residence, public listing, a real active trade or business, sometimes derivative benefits. The MLI offers a simplified version (simplified LOB), while the detailed LOB is traditionally embedded in US treaties. Three combinations satisfy the standard: the PPT alone; the PPT together with a simplified LOB; or a detailed LOB plus a separate mechanism against conduit structures. Most countries chose the PPT as the shortest route to compliance; US treaties traditionally rely on LOB.

Substance Over Form

Both instruments require attention to the actual arrangement, but neither imposes a universal minimum number of employees, a dedicated office or a fixed spending ratio. Functions, decision-making, control of income and economic risk are evidence whose relevance depends on the rule and activity concerned. A passive holding company and an operating finance business need different factual explanations. Burlington concerns a specific UK–Ireland treaty clause: its treatment of an independent debt purchase is not a general safe harbour from PPT for unrelated parties.

Application

A typical dispute involves a holding company claiming reduced withholding tax without independent decisions or control over the income. These facts invite scrutiny; lack of employees by itself does not establish PPT abuse. Work through the benefit, purposes and treaty object-and-purpose proviso, and assess any domestic GAAR separately. A defensible file records actual functions and risks, the reasons for the structure, who decides and whether implementation matches those reasons.

The same issue arises for financing and licensing entities. A company that receives interest or royalties and is legally or factually obliged to pass the income onward may fail an applicable beneficial-owner condition. That is distinct from PPT: control of the income does not by itself settle the purpose test, and a rapid onward payment does not by itself establish abuse. Examine the loan or licence terms, discretion over the income, actual functions and commercial rationale. Further reading: holding structures.

Regulation: Lines of Defense Against Abuse

In the EU, Article 6 of ATAD, adopted on 12 July 2016 and applicable from 1 January 2019, establishes a minimum corporate-tax anti-abuse rule. It targets arrangements that pursue a tax advantage contrary to the purpose of the applicable law and are non-genuine because they lack valid commercial reasons reflecting economic reality. Article 3 permits a higher level of protection under national or treaty provisions. The Parent-Subsidiary Directive has its own anti-abuse clause; its cases below should not be treated as decisions on every domestic GAAR or treaty PPT. Further reading: Council Directive (EU) 2016/1164, EU ATAD and CFC.

National procedure also differs. The British GAAR has applied since 17 July 2013 and uses a double-reasonableness test. Its safeguards include GAAR Advisory Panel opinions and notification procedures. The current procedure can also use opinions on equivalent arrangements and binding notices, so a separate new Panel referral is not an invariable prerequisite for every assessment. HMRC explains these routes in its current GAAR factsheet. Further reading: GAAR (Finance Act 2013).

Comparing Domestic GAAR and Treaty PPT

This comparison covers six useful legal frameworks as at 26 September 2026. The EU row describes a minimum standard, not one national tax system. The treaty column identifies the boundary of the analysis; it does not certify that a PPT applies to every treaty of the jurisdiction. For each actual payment, first confirm the treaty, tax, benefit and effective date.

Consequences and Evidence

The evidence column is a practical way to organise a file, not a statutory checklist or a guarantee of relief.

Beneficial Owner and the Danish Cases

How far the substance principle extends was shown by the EU Court in the Danish cases of 2019—concerning dividends and interest leaving the EU through transit companies. The Court applied the general EU-law prohibition of abuse: a benefit under the directives must be denied in the case of an artificial structure, even when there is no specific provision in national law, and a transit link that does not control the received income is not recognized as its beneficial owner. A detailed analysis of the requirements and conclusions of these cases can be found in the section below; how the chain of ownership is built and who is recognized as the beneficial owner is explained in the article on beneficial ownership and nominee.

The CJEU Danish Cases: Conduits Under the General Principle of EU Law

On February 26, 2019, the Grand Chamber of the Court of Justice of the EU delivered two judgments covering six Danish disputes. The first concerned interest: the joined cases N Luxembourg 1 (C-115/16), X Denmark (C-118/16), C Danmark I (C-119/16), and Z Denmark (C-299/16), decided under the Interest & Royalties Directive. The second concerned dividends: T Danmark (C-116/16) and Y Denmark (C-117/16), under the Parent-Subsidiary Directive.

The schemes followed one pattern. A Danish company paid interest or dividends to a parent structure in Luxembourg or Cyprus—inside the EU, where the directives remove withholding tax at source. The intermediary passed the money on almost immediately: to private equity funds and parent companies outside the Union, where the directives' relief no longer reaches. The intermediate link had no functions of its own—receive and forward.

The Court said two things, and each changed practice. First: the prohibition of abuse of rights is a general principle of EU law that operates on its own. National authorities and courts must refuse a directive benefit "even if there are no domestic or agreement-based provisions providing for such a refusal"—that is, even where no such rule exists in national law, in the tax treaty, or in the directive itself. Invoking a domestic GAAR is no longer necessary: the abuse of law doctrine is built into the Union legal order.

Second: the Court described how to identify a conduit. The money moves on very soon after receipt; the recipient has no real economic activity—no staff, premises, equipment, or independent management; it has no right to dispose of the income, meaning it lacks the power to use and enjoy what it received. The concept of beneficial owner is read not formally but in light of the commentaries on the OECD Model Tax Convention, including versions adopted after the directives: the beneficial owner is the one who economically receives the income and freely decides its fate. It matters separately that the tax authority need not identify the actual beneficial owner—it is enough to show that the claimant was a transit link. The Court required refusal where abuse is established; applying that test to the individual disputes remained for the national courts. Beneficial ownership is an express condition of the Interest & Royalties Directive; the dividend cases must also be read through the separate prohibition of abuse.

What follows for practice. The intermediary's substance has stopped being decoration: people, premises, and decisions actually taken on-site are tested on the facts, not on the charter. The right to dispose of income weighs more than title—if the money is committed onward by contract or by the design of the transaction itself, the link is not a beneficial owner, however many shares it holds. And the business purpose must be recorded in advance: why the link appeared, what functions it carries, who takes decisions and where. The model the Court described in 2019 was a conduit model: it looked for a link without functions sitting between the source and the ultimate recipient. The case law of 2025–2026 has moved beyond that frame. How dividend flows inside a holding are arranged is examined in the article on dividend distribution in a holding.

Nordcurrent: Anti-Abuse Beyond the Conduit

On 3 April 2025 the Court of Justice of the EU decided C-228/24 (Nordcurrent group), and the judgment widened the frame set by the Danish cases. The dispute concerned the application of the anti-abuse rule of the Parent-Subsidiary Directive — Article 1(2)–(3) of Directive 2011/96/EU — to a subsidiary that carried on its own activity and was not a transit link.

The first holding: the rule is not confined to conduit arrangements. A subsidiary with functions of its own also falls within the test, and the status of "not a shell" does not by itself shield it.

The second holding concerns time. The Court required consideration of all relevant circumstances, including formation and subsequent steps. An initially genuine arrangement may become non-genuine after circumstances change, but a change of functions is not an automatic finding of abuse. Nor may the administration assess the arrangement solely by conditions at the payment date. These qualifications appear in Nordcurrent, paragraphs 32–43.

The third holding protects the taxpayer against an incomplete analysis. Under Nordcurrent, non-genuineness alone does not justify refusal: the arrangement must also pursue, as a main purpose or one of its main purposes, an advantage contrary to the Directive’s object or purpose. Both elements must be established.

A practical response is to review the business rationale when functions or circumstances change and record the governing body’s actual decisions. An annual review may help organise this work, but Nordcurrent does not mandate that interval, guarantee relief for a complete file or require liquidation after a transfer of functions. The file must address both non-genuineness and the purpose of obtaining an advantage contrary to the Directive. Further reading: economic substance, the economic presence file.

C-⁠203/25: The Advocate General's Opinion

On 21 May 2026 Advocate General Kokott delivered her Opinion in C-203/25, Neo Group. As at 26 September 2026 the official case file lists the Opinion and no published judgment. It is a proposed interpretation, not binding case law; the Court may reach a different conclusion.

The facts are unusual in that the tax authority disputed neither the beneficial owner status of the direct recipient of the dividends nor the reality of its activity. The objection rested elsewhere: the arrangement as a whole was treated as non-genuine in the interest of the ultimate beneficiary.

The Advocate General proposes that a genuine beneficial owner should normally receive the Directive benefit where its conditions are met. Exceptionally, abuse elsewhere in the overall arrangement may justify refusal if there is a purposive connection between that abusive element and the EU-law advantage. This is a proposed exception, not a new rule already adopted by the Court.

In that genuine-recipient setting, the Opinion treats mere matching amounts and close timing of onward dividends as neither an indication nor a condition of abuse. It also distinguishes abuse of another Member State’s domestic tax rules from abuse of the Directive: the former normally belongs to that State’s own response, though intended tax evasion by the ultimate beneficiary may matter. The stated facts did not appear to establish such evasion, subject to the national court’s checks. The purpose analysis considers the knowledge of the person deciding the arrangement, usually the controlling shareholder, together with objective circumstances (paragraphs 65–98).

Alta Energy: Where the Line Runs on Choosing a Jurisdiction

The Canadian story shows the same problem from the other side. Luxembourg-based Alta Energy Luxembourg S.A.R.L. held shares in a Canadian oil and gas subsidiary and sold them, realizing a capital gain of more than $380 million. It paid no Canadian tax, relying on Article 13(4) of the Canada-Luxembourg treaty: the provision exempts gains on shares deriving their value from immovable property where a business is carried on in that property. The CRA attacked the transaction under Canada's GAAR, calling it classic treaty shopping.

In Canada v Alta Energy, 2021 SCC 49, the Supreme Court sided with the taxpayer six to three; Justice Côté wrote the majority judgment. Residence under Article 4 depended on liability to tax through a recognised connecting factor; Luxembourg law accepted legal seat or central management. The majority declined to add an unstated substantive-economic-connection requirement and found that the exemption served the treaty’s investment purpose. It did not hold that formal incorporation overrides every anti-abuse rule.

Chief Justice Wagner and Justices Rowe and Martin dissented. They considered the same treaty benefit abusive under the existing Canadian GAAR, reading the allocation of taxing rights through economic allegiance and rejecting the use of a conduit with no genuine connection. Their disagreement concerned the purpose of the existing provisions and its frustration; it was not a finding that courts lacked any rule permitting a purpose analysis.

The case concerned the treaty and GAAR applicable to a 2013 disposal. For a later transaction, establish the treaty text and dates first, including whether an MLI PPT is effective, and apply the current domestic GAAR separately. Under PPT, finding a principal tax purpose opens rather than completes the analysis: the object-and-purpose proviso remains. Alta Energy therefore neither guarantees relief for similar structures today nor proves that the same facts must now lose. Further reading: the Luxembourg SOPARFI.

Alta Energy illustrates why the text, context and purpose of the particular treaty matter. A PPT can change the applicable analysis, but the presence or absence of a PPT is not a universal dividing line between lawful and abusive planning.

Burlington: Where the Bar Sits on the Main Purpose Test

The English story of 2026 calibrates the same logic for transactions between unconnected parties. Ireland-resident Burlington Loan Management DAC bought from Cayman-based SICL a claim in the administration of Lehman Brothers International Europe. Post-administration interest on the claim came to £90.7 million; the administrators withheld 20 percent of it as UK withholding tax — £18.1 million — and paid it over to HMRC. Burlington paid about 92.08 percent of the interest payable to acquire the claim, expecting to reclaim the tax withheld under Article 12(1) of the UK-Ireland treaty. HMRC invoked Article 12(5) of the same treaty: the benefit does not apply where it was the main purpose or one of the main purposes of any person concerned with the creation or assignment of the debt-claim to take advantage of Article 12 by means of that assignment. The formula "main purpose or one of the main purposes" reproduces the drafting proposed in the OECD Commentary, which makes Article 12(5) the closest treaty relative of the PPT.

On 20 April 2026 the Court of Appeal (Burlington, EWCA Civ 461 (2026)) dismissed HMRC’s appeal. It interpreted Article 12(5) of the UK–Ireland treaty applicable to the dispute, not MLI Article 7. Three points follow.

Artificiality is not a separate prerequisite. The 1998 protocol removed the earlier condition concerning absence of bona fide commercial reasons, so a commercially motivated assignment can still fall within Article 12(5). But obtaining a benefit is not the same as taking improper advantage of the treaty. The Court assumed for argument that obtaining the benefit was a main purpose and decided that the transaction did not misuse the provision’s object and purpose (paragraphs 49–59 and 90–104).

The analysis starts from the position after the transaction. HMRC argued that the starting point is the position before the assignment, when interest in the hands of the Cayman seller would have been taxed in full, with the parties sharing the difference at the Exchequer's expense. The Court disagreed: the correct starting point is that by Article 12(1) the UK agreed that a resident of Ireland who is the beneficial owner of the claim should be taxed on the interest only in Ireland. Starting the analysis from an assumption that the very assignment Article 12(5) contemplates did not happen is illogical.

Deliberate pricing is permissible, but on its own it is not enough. A purchaser may factor its own tax attributes into the price; without something more, acquiring a claim in the expectation of the exemption the treaty expressly provides is not abuse. A seller who knows that the market price is being paid by a purchaser with those tax attributes does not thereby acquire a purpose of "taking advantage of" the treaty.

The Court said the assessment may differ for connected parties or an acquisition outside ordinary market conditions. That does not establish an automatic presumption of abuse for connected parties, nor exclude abuse whenever parties are independent. The economic interests retained by the seller and the actual arrangement matter (paragraphs 98 and 105–119).

India: How One Administration Reads the PPT

Of the national guidance on the PPT, the most practical to date is India's. CBDT Circular No. 1/2025 of 21 January 2025 sets out how the Indian administration applies the test across its tax treaties.

The central point is prospectivity. The PPT applies from the date of entry into force of the treaty itself or of an amending protocol and, where the rule arrived through the MLI, from the date the MLI provisions took effect. Specific bilateral grandfathering commitments recorded in the treaties with Mauritius, Singapore and Cyprus fall outside the purview of the PPT, while specific provisions of those treaties — the LOB clause of the India-Singapore treaty, for instance — continue to apply. As supplementary sources of interpretation the circular names the BEPS Action 6 final report and the Commentary on Articles 17 and 29 of the UN Model Tax Convention as updated in 2021, subject to India's reservations.

Where This Is Heading

STTR is a separate Pillar Two treaty rule for specified cross-border intragroup payments taxed below a 9 percent nominal rate in the recipient jurisdiction. The additional taxing right is bounded by the model rule, including its scope, exclusions, thresholds and treatment of existing source taxation; it is not a GAAR or a universal tax charge. The first STTR convention signing ceremony took place on 19 September 2024. As of 26 September 2026 the convention is not yet in force: the OECD announcement of 15 September 2026 says Albania’s ratification, the second instrument of ratification deposited, triggers entry into force on 1 January 2027 for Albania and San Marino. Application to a payment still requires the relevant treaty provisions and effective dates. See the OECD model rule and commentary. Further reading: Pillar Two, economic substance.

Presumptions: What Shifted This Year

The following are factual indicators to investigate, not legal presumptions or independent grounds for refusal. Nordcurrent and Burlington are judgments in their respective legal settings; the 2026 Neo Group Opinion remains non-binding.

Read the chronology as a whole. Formation, later changes and the relevant payment all matter; none automatically displaces the others. Contemporaneous records help establish facts but do not replace the legal conditions for refusal.