“Miguel Durham Agrellos rises in the rankings, with clients endorsing him for his “extraordinary experience and knowledge in the area of tax law as well as efficient management, conduction and definition of the action strategy in the matters, which gives us great comfort.” Another satisfied client states: “He is very rigorous in his work, has lots of knowledge and at the same time demonstrates diplomacy and cordiality.” He is skilled at handling corporate and finance-related tax matters, as well as contentious mandates.”
Chambers Europe 2021

“Miguel Durham Agrellos is one of the most prestigious and experienced lawyers in the market. He is very well known by his capacity to understand the client’s needs and offers solid and trustworthy solutions. He is always one step ahead.”
The Legal 500 2020

“«Excellent tax lawyer» Miguel Durham Agrellos possesses a wealth of experience handling advisory and litigious tax mandates. He comes recommended by market sources, who single him out for his «very strong knowledge of the law, and focus on legislative changes».”
Chambers Europe 2020

“Agrellos advises the owners of significant family businesses on asset structuring and successions. He is also noted for his long-term expertise in Brazil-Portugal cross-border matters, and often advises on international relocations. A client describes Miguel Durham Agrellos as «an insightful, intelligent, empathic lawyer who uses all his knowledge at the service of the best solutions to their clients».”
Chambers HNW 2020

Miguel Durham Agrellos


Miguel Durham Agrellos is founding partner of Durham Agrellos.

Miguel has a law degree from the Catholic University of Portugal (Porto, 1998), a Postgraduate degree in Management from the same University (Porto, 1999) and a Postgraduate degree in Tax Law from the Business & Economics School (Lisbon, 2003).

He has been active in the legal industry in tax advisory for more than 20 years. Miguel is based in Portugal, dividing his time between the two major cities – Lisbon and Porto. He also advises overseas clients on a regular basis.

Before creating Durham Agrellos, for almost 14 years Miguel headed the Oporto Tax and Private Client department of an international law firm. Previously he worked as an Associate with a major Portuguese law firm, Vasconcelos, F. Sá Carneiro, Fontes & Associados and worked as a Tax Consultant to Jerónimo Martins Group, the major and most successful Portuguese retail group with relevant operational activity in Portugal and abroad, namely in Eastern Europe and Central America.

Miguel focuses on wealth management, international tax and inheritance planning, corporate restructuring and tax litigation and arbitration.

Miguel has a wealth of experience in advising family-owned groups, in particular exporting companies, ultra and high-net-worth individuals and families, and banks with private banking operations, family offices and asset managers. He frequently advises multinational groups operating in Portugal.
Miguel is a tax arbitrator of the Portuguese Administrative and Tax Arbitration Centre and lectured at the Porto Business School of the Catholic University of Portugal. He frequently writes articles on tax issues and regularly speaks at conferences.