A permanent establishment (PE) is a fixed place of business through which an enterprise of one contracting state carries on business in another, triggering that other state’s right to tax the profits attributable to it. The concept originates in Article 5 of the OECD Model Tax Convention, with profit attribution governed by Article 7. Disputes arise both over whether a PE exists at all and, once existence is conceded, over how much profit should be allocated to it. The arm’s length standard applies to internal dealings between a PE and its head office under the Authorised OECD Approach, treating the PE as a hypothetically separate and independent enterprise.

In practice, tax authorities contest the existence or scope of a PE where an enterprise argues it has no taxable presence, or where it accepts a PE but disputes the quantum of profits attributed to it. The representative cases here span both dimensions: in Italy, HSBC’s Milan branch faced assessment on the basis that loan transactions with Parmalat should have generated arm’s length income within the PE; in Uganda, authorities alleged East African Breweries International had a PE through marketing activities when the taxpayer maintained those functions occurred outside Uganda. German cases involving pipeline networks and meat-cutting operations raise attribution questions — specifically how costs and revenues are allocated between the PE and associated entities when services and employees cross borders.

The governing OECD framework is found in Article 5 and Article 7 of the OECD Model Tax Convention, together with the 2010 Report on the Attribution of Profits to Permanent Establishments, which formalised the Authorised OECD Approach. Chapters I through III of the OECD Transfer Pricing Guidelines on the arm’s length standard apply once a PE is identified. The 2017 update to the OECD Model Commentary on Article 5 addressed agency PEs, commissionnaire arrangements, and the preparatory or auxiliary activity exceptions following BEPS Action 7. EU member states are additionally subject to the Anti-Tax Avoidance Directive and domestic implementations thereof. France’s application of Article 57 of the General Tax Code to branches, confirmed in Sodirep Textiles, illustrates how domestic anti-avoidance provisions overlay the treaty framework.

Courts examine whether a fixed place of business is maintained with sufficient permanence, whether personnel with authority to conclude contracts operate there, and whether functions, assets, and risks attributable to the PE support the profits claimed. Evidence of operational control — as in the Dutch operations centre in the Z Pipeline case — and the contractual and functional characterisation of intra-group arrangements are frequently determinative. Burden of proof as to the existence and scope of the PE typically falls on the authority, while rebutting a presumption of profit transfer falls on the taxpayer.

These cases matter because PE disputes sit at the intersection of taxing jurisdiction and profit allocation, making them central to both treaty interpretation and transfer pricing practice for any enterprise operating across borders through branches, subsidiaries, or agency arrangements.