Laurent Donnay de Casteau

Laurent is a tax specialist acting in all aspects of direct taxes (corporate and personal tax). He has extensive experience both at international and Belgian levels. His extensive practice focuses on corporate structuring/restructuring, the tax aspects of M&A, private equity, investment funds, international mobility of employees and remuneration schemes, and high net worth individuals. He serves publicly-traded and closely held businesses, both at the level of the companies and the ultimate shareholders.

He is recognised as a tax expert. Independant international legal directories (Chambers, Legal500) published recognitions. Clients appreciate that he « is able to be innovative and can think outside the box to find answers » (Chambers, Europe, 2018). He is also described by clients as being « straight to the point, very smart and highly effective » (Chambers, Europe, 2019) and « a client-centric tax practitioner. He combines technical knowledge with clear explanations and valuable solutions » (Legal500, 2020).

Laurent is adjunct professor at the prestigious business school ESCP-Europe (Paris and Luxembourg) in international tax (International mobility, remuneration and stock options). Moreover, he is a member of the International Fiscal Association, and has been a member of the Brussels Bar since 2000. Before founding Advisius, he spent over 20 years working in a top-tier Benelux law firm (Brussels and Paris offices) and an English law firm.

Laurent’s academicals are law (UCL), economics (Leuven Management School – Vlerick), and tax (ESSF Brussels, and Harvard University -J.F. Kennedy School-).



Cell: +32 477 825 779
Tel: +32 2 891 80 51

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