Guillaume Massé



Wealth management
Management package
Managing relations with tax authorities
Tax litigation
Taxation of New Information and Communication Technologies (NICT)
Real estate structuring for residential or business premises
International mobility


• Business Law Institut (IDA) – Paris II Panthéon-Assas University
• DESS in International Taxation – Paris XII Créteil University
• DEA in Contract Law – Paris XI Sceaux University
• Member of the Paris Bar

Languages: French | English

As a tax lawyer, Guillaume provides advice and litigation support to companies and investors of all sizes.

He is a regular speaker on the taxation of new technologies, in particular the research tax credit (crédit d’impôt recherche – CIR) and young innovative companies (jeunes entreprises innovantes – JEI)..

He can advise you on regulated incentives via management packages, and in the structuring of your equity transactions and company acquisitions. He can help you structure your equity capital transactions and company acquisitions.

He also assists you in your dealings with the authorities, during tax audits and when applying for approval.

Whether you’re an executive or an employee, he can help you manage tax issues associated with international mobility.

If you are a private investor, Guillaume can help you with real estate structuring, international probate, Dutreil pacts or family holding companies.

Guillaume is a member of the Institut des Avocats Conseils Fiscaux (IACF).