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Tax Litigation and Investigations

In the increasingly complex and international area of tax legislation and practice, Allen & Overy’s global team of experts supports businesses in the full range of high-end cross-border disputes and investigations.

Our advice on all aspects of corporate, commercial, VAT and finance tax is designed to avoid disputes, but we are ideally placed to provide support when, or even after, various issues with revenue authorities arise. 

A&O advises a broad range of clients on tax compliance and tax-related disputes and investigations, with particular experience of advising financial institutions. We handle litigation before national and international courts and specialist tax tribunals, including Corporation Tax and VAT disputes, and we liaise with tax authorities and advise on all issues associated with enforcement proceedings.

What sets us apart is our deep experience in handling cross-border transactions, with tax teams in our international offices enjoying strong relationships with local revenue authorities to support the smooth resolution of disputes for the benefit of all parties. 

News and insights

Aerial view of a circular maze

News: 27 March 2024

Allen & Overy conseille Orano sur le lancement avec Supernova Invest du fonds Orano Venture Fund dédié à la transition industrielle souveraine et durable

Allen & Overy a conseillé Orano, groupe international reconnu dans le domaine des matières nucléaires, dans le cadre du lancement avec Supernova Invest du fonds d’investissement Orano Venture Fund qui…

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News: 15 February 2024

Allen & Overy conseille le syndicat bancaire sur le placement de la première émission d’Obligations Restricted Tier 1 d’AXA d’un montant de 1,5 milliard d’euros

Allen & Overy a conseillé le syndicat bancaire, comprenant notamment Citigroup Global Markets Europe AG et HSBC Continental Europe en qualité de Coordinateurs Globaux et Teneurs de Livres Associés,…

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Exterior of a modern glass and metal building

Publications: 18 September 2023

Directive 1828/2020 sur les actions représentatives et réforme des actions de groupe en France

La directive (UE) 2020/1828 a créé un socle commun pour les actions de groupe au sein de l’Union Européenne, qui devrait conduire le Parlement français à adopter, dans les prochains mois, une réforme…

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Publications: 28 April 2023

New rules for arbitration under Luxembourg law: A modern and flexible framework for dispute resolution

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