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Insights

Clear thinking on the Spanish tax questions affecting internationally mobile people, private wealth and cross-border business.

Lullius briefings

Our writing focuses on the decisions, risks and procedural moments that matter in practice.

107 insights

Blog, News30/06/2026
01

The Beckham regime for incoming company directors: a close reading of DGT ruling V1209-25

A recent binding ruling sets out, with unusual clarity, the conditions an incoming director must satisfy to elect the special regime for inbound workers, and where the familiar plan of directing and invoicing through one’s own Spanish company is most exposed. A close reading of DGT consulta V1209-25 of 3 July 2025. Most of what

Blog, News24/06/2026
02

Tax Disputes in Spain: A Guide to Tax Controversy and Litigation for International Clients

A comprehensive guide to contesting the Spanish tax authority, for high-net-worth individuals, international families and their advisers, written for readers accustomed to the procedures of HMRC and the IRS. Tax disputes in Spain are also known as tax controversy, tax litigation, and tax dispute resolution; the terms are used interchangeably throughout. Tax disputes in Spain

Blog, News22/06/2026
03

Private Client, Private Wealth & Tax Lawyers in Mallorca and Spain

Lullius is a tax boutique with offices in Palma de Mallorca and Madrid. We advise clients across the whole of Spain, and act for international private clients on the questions that follow wealth across borders: Spanish and cross-border tax, private wealth and succession, and tax controversy. Our clients are individuals and families rather than the

Blog, News19/06/2026
04

The Migrating Company: Permanent Establishment Exposure Arising from the Beckham Law

A note for founders, executives and investors who have established Spanish tax residence while continuing to direct a business incorporated abroad. An individual relocates to Spain and leaves the structure of his affairs ostensibly intact. The operating company remains incorporated where it always was, in Delaware, in London, in Luxembourg; its clients, its banking and

Blog, News18/06/2026
05

Remote work from Spain: when does a home office create a permanent establishment?

The OECD’s November 2025 update to the Commentary on Article 5 sets out, for the first time in nearly a decade, when cross-border remote work creates a permanent establishment. A note on the new framework and how it meets Spain’s traditionally assertive approach. For a foreign company with an employee working from Spain, one question

Blog, News18/06/2026
06

Tax Disputes in Spain: A Guide for the Internationally Mobile Taxpayer

An analysis of the Spanish tax review system and its strategic inflection points, written for advisers and clients accustomed to the procedures of HMRC and the IRS. I. Why international taxpayers in Spain find themselves in dispute The taxpayer who relocates to Spain rarely arrives anticipating a confrontation with its tax authority. Yet the Agencia

Blog, News16/06/2026
07

The Beckham regime and consulting structures: a recurring pitfall

International professionals who move to Spain, elect the special regime for inbound workers, and invoice their consulting services through a Spanish company they direct, often build the structure most exposed to challenge. A note on why, and on what the Spanish authorities now require. A pattern recurs in practice. An international professional plans to move

Blog, News14/06/2026
08

The taxation of trusts in Spain: how the look-through doctrine works in practice

Spain does not recognise the trust, so it taxes through it. A note on the fiscal transparency doctrine of the Dirección General de Tributos, its recent confirmation by the Tribunal Económico-Administrativo Central, and what it means for settlors and beneficiaries who are resident in, or hold assets in, Spain. The trust is one of the

Blog, News13/06/2026
09

Substance over form: the AEAT’s new approach to internationally mobile taxpayers

The shift from documentary review to substance-based enforcement in Spanish tax controversy, and what it now asks of internationally mobile individuals and the structures through which they hold their affairs. For most of the last decade, a Spanish tax inspection of an internationally mobile individual was a documentary exercise. The inspector confirmed that returns had

Blog, News01/06/2026
10

Data-Driven Tax Audits: How Spain’s Tax Authority Selects Risk and What It Means for HNWI

The way in which the Spanish Tax Agency (Agencia Estatal de Administración Tributaria, “AEAT”) decides whom to audit has changed profoundly. The selection of taxpayers no longer rests on manual or isolated criteria but on the mass processing of information, the systematic cross-checking of sources and, increasingly, on artificial intelligence tools that detect inconsistencies and

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