The general anti-abuse rule at the heart of modern tax treaties. Introduced through the OECD BEPS project and rolled out worldwide by the Multilateral Instrument, the PPT denies treaty benefits where obtaining them was a principal purpose of an arrangement.
The Principal Purpose Test is a general anti-abuse rule designed to stop “treaty shopping” — the use of intermediate entities inserted into a structure mainly to access the benefits of a tax treaty. It emerged from Action 6 of the OECD/G20 BEPS project, which made anti-abuse provisions a minimum standard, and was implemented across thousands of bilateral treaties through the Multilateral Instrument (MLI).
Unlike the mechanical Limitation on Benefits clause favoured by the United States, the PPT does not sort taxpayers into qualifying categories. It asks a single question about the purpose of an arrangement, and gives tax authorities broad discretion to deny benefits where the answer points to abuse.
The benefit does not have to be the sole or dominant purpose — being one of the principal purposes is enough to bring the rule into play. This is a deliberately low threshold that captures a wide range of arrangements.
Even if a benefit was a principal purpose, it survives where granting it is consistent with why the treaty provision exists. Genuine commercial arrangements with real substance are intended to fall on the right side of this line.
Pin down the specific treaty benefit claimed — a reduced withholding rate, an exemption, relief.
Assess the purposes of the arrangement objectively, on all the facts and circumstances.
Was obtaining the benefit one of the principal purposes? A reasonable-conclusion standard applies.
If so, would granting the benefit still fit the object and purpose of the provision? If yes, it stands.
A group establishes a holding company in an EU state to manage a portfolio of European subsidiaries. It has local directors, offices, staff and makes real decisions. It claims reduced withholding on dividends from those subsidiaries.
Why: the treaty benefit is incidental to a real business purpose — consistent with the object and purpose of the provision.
An investor routes a single dividend flow through a newly created entity in a treaty-favourable state. The entity has no staff, no premises and no function beyond holding the shares for the payment.
Why: obtaining the reduced rate looks like a principal purpose, with no substance to bring it within the safe harbour.
The PPT rewards substance over structure. Two arrangements that look identical on paper can be treated differently — the deciding factor is whether real economic function sits behind them.
| Dimension | PPT | LOB |
|---|---|---|
| Type of rule | Subjective, purpose-based | Objective, mechanical |
| Core question | Was a benefit a principal purpose? | Do you fit a qualifying category? |
| Certainty | Lower — judgement-based | Higher — bright-line tests |
| Flexibility | High — adapts to facts | Low — fixed categories |
| Adopted by | OECD, EU states, via the MLI | Primarily the United States |
| What matters most | Substance & commercial rationale | Ownership, listing, activity |
Structures spanning the US and Europe frequently have to satisfy both regimes at once. See LOB vs PPT: two ways to close the treaty door for how the two interact in transatlantic structures.
Because the PPT turns on purpose and substance rather than form, structures should be built — and documented — to demonstrate genuine economic function. In practice that means:
A holding used purely as a conduit is the paradigm case the PPT is designed to catch. See substance requirements for how this is applied at entity level.
No. The rule applies where obtaining the benefit was one of the principal purposes — it does not need to be the sole or even the dominant one. This is what makes the threshold relatively broad.
In principle a benefit that was a principal purpose is still granted where doing so accords with the object and purpose of the treaty. Genuine commercial arrangements with real substance are intended to qualify for this carve-out.
It applies in the many treaties modified by the MLI and in treaties that incorporate the OECD Model wording. Most EU member states, including the Netherlands, apply the PPT.
LOB is objective and category-based; the PPT is subjective and purpose-based. The US relies on LOB, while the OECD and EU rely on the PPT — and some treaties combine both.
Two ways to close the treaty door — and why US–EU structures face both.
Read the article → GuideThe participation exemption, treaty network and PPT in Dutch practice.
Read the guide → ReferenceWhat real economic function looks like at entity level.
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