Margaux Cauchie | Fieldfisher
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Professional background

Professional background

I am mainly a tax litigator active in administrative and judicial proceedings. I handle issues that raise questions of principle as well as deep factual analyses.  I also advise on various tax aspects of the sectors; real estate planning, life science, and technology. As a result of my education in both criminal and tax law, I have developed a particular interest in tax crime issues at both national and European/international level, including money laundering, tax fraud and investigations, and corruption.

For two years I was a member of a junior enterprise called LLN Juris Club, active in drafting legal documents and providing legal advice. Before joining Fieldfisher, I did a summer internship there and then also acted as paralegal.

I studied at three different Belgian universities. Firstly, I obtained  a bachelor's degree in law at the Université de Saint-Louis (USLB). I continued my studies  with a master's degree in law with a major in civil and criminal law and a minor in tax law at the Université Catholique de Louvain (UCL). Finally I completed a master's degree specializing in tax law at the University of Brussels (ULB).

I have been  a member of the French Bar Association of Brussels since October 2023.

I am fluent in French and Dutch. I also have a good knowledge of English.

Authored pieces

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An abstract digital illustration featuring interconnected lines and dots. The composition transitions from a pink hue on the left to a blue hue on the right, creating a gradient effect. Peaks and valleys formed by lines resemble a data graph or network connectivity map.
Tax
Insight

Belgian Tax Reform – Second Draft Law Moves Forward

07.08.2025
On 3 July 2025, the federal government submitted to Parliament a second draft Law implementing the next wave of tax measures announced in the so-called "Easter Agreement" (cf. our previous newsflash).The proposal follows the first Program Law, adopted on 17 July 2025 and published on 29 July 2025 in the Belgian Official Gazette (cf. our previous newsflash), which already introduced a first set of measures.
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An abstract digital illustration featuring interconnected lines and dots. The composition transitions from a pink hue on the left to a blue hue on the right, creating a gradient effect. Peaks and valleys formed by lines resemble a data graph or network connectivity map.
Tax
Insight

Belgian Tax Reform – Draft Program Law Implements First Wave of Measures

11.06.2025
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Tax
Insight

"Easter Agreement": Belgian Tax Reforms You Need to Know!

28.04.2025
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Tax
Insight

Leveraged Equity Distributions: Interest Tax Deductibility Confirmed

24.03.2025
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Insight

Payments and asset transfers to tax havens: so-called compliance with European case law

27.03.2024
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