Maître Maximilien Dechamps Tax law specialist · Avocat at the Paris Bar
International tax and tax criminal law
Technical, precise and unforgiving, taxation is a high-level sport. It is also risky, even dangerous, and must be handled by expert hands.
Cabinet Dechamps works across two high-stakes specialisms: international tax, for your transactions, structures and cross-border strategy; tax criminal law, to defend you before the criminal courts. Consultations in Paris or by video call — in French, English and German.
Practice areas
Two high-stakes specialisms, in advisory and in defence, with particular strength on the France–Luxembourg axis.
International tax
Tax treaties, mobility and cross-border structuring, with particular strength on the France–Luxembourg axis.
Learn more →Tax criminal law
Defence before the criminal courts: tax fraud, VAT fraud, money laundering, and anticipation from the audit stage onwards.
Learn more →How your matter is handled
A simple, transparent process — from first contact to the resolution of your case.
You describe your situation
Through the online form, in just a few minutes. Your exchanges are protected by attorney–client privilege.
A reply within 24 hours
The firm gets back to you within one business day and offers a consultation within 48 hours, in Paris or by video call.
Analysis and fee estimate
You leave with a clear analysis of your tax situation and a detailed fee agreement, before any commitment.
Defending your interests
Tax strategy, dealings with the authorities or litigation: you are kept informed at every stage of your matter.
The firm
A graduate of Sciences Po Strasbourg with a Master 2 in public law (top of his class), Maximilien Dechamps practised at the Administrative Court of Strasbourg and the Banque de France, then within leading tax firms (CMS Francis Lefebvre, KPMG Avocats, EY) before joining the Paris Bar. He works in international tax and tax criminal law, in French, English and German.
Frequently asked questions
Why consult a tax lawyer rather than an accountant?
An accountant prepares your filings; a tax lawyer builds the strategy upstream, secures complex operations (sale, transmission, moving abroad) and defends you before the authorities. Exchanges with a lawyer are also covered by absolute professional privilege, including vis-à-vis the tax authorities.
Does the firm handle Franco-Luxembourg matters?
Yes — this is one of the firm’s core areas of development: commuter taxation, application of the tax treaty of 20 March 2018, structures involving Luxembourg entities. For questions governed strictly by Luxembourg law, the firm works in a network with colleagues admitted to the Luxembourg Bar.
How much does a tax consultation cost?
The first consultation is offered at a fixed fee, communicated before any commitment. Following that consultation, a written fee agreement details the cost of the engagement, on a fixed-fee or time-spent basis depending on the nature of the matter.
What should I do if I receive a reassessment proposal from the tax authorities?
You generally have 30 days to respond, extendable by a further 30 days on request. Do not respond alone: a poorly framed answer can lock the file. Contact a tax lawyer as soon as you receive it, to protect your rights and build the response strategy.
Do you work remotely?
Yes. Consultations take place at the Paris office or by video call, which makes it possible to assist clients across France and abroad. The firm works in French, English and German.