Althéia Avocat

Stéphanie Jouanin

Tax Law Programme of Excellence

Stéphanie Jouanin

A journey of excellence

A member of the Paris Bar since 2014 and founder of the law firm Althéia Avocat, Stéphanie Jouanin practises tax law, providing both advisory and litigation services.

Stéphanie Jouanin assists individuals and legal entities (both public and private) with the implementation of their tax planning projects, regardless of their sector of activity. She also supports her clients in ensuring the success of their projects.

Thanks to her experience (working for law firms representing clients before the Court of Cassation and the Council of State, and the Constitutional Council), Stéphanie Jouanin has also developed expertise in litigation. She therefore assists her clients with matters ranging from tax audits to bringing cases before the courts.

Before setting up her own practice, Stéphanie Jouanin worked at several Parisian firms, where she was able to acquire and develop expertise in all areas of taxation.

Stéphanie Jouanin teaches tax law at university (University of Paris I – Panthéon-Sorbonne, University of Paris 8).

Stéphanie Jouanin is a member of the Institute of Tax Lawyers and Advisers (IACF) and the Institute of Criminal Tax and Financial Law (IDP2F).

As a holder of the ‘specialisation in tax law’ certification, Stéphanie Jouanin has recognised expertise in tax matters. This specialisation involves a panel of professionals (judges, university lecturers and lawyers) assessing and recognising the lawyer’s competence in the relevant field of practice.

Training & assessment

2025 Spécialisation en droit fiscal
2014 Certificat d’Aptitude à la Profession d’Avocat, EFB Paris
2013 Master 2 Droit fiscal, Université Paris I – Panthéon-Sorbonne
2012 Master 1 Droit fiscal, Université Paris I – Panthéon-Sorbonne
2012 Master 2 Droit européen, Université Paris I – Panthéon-Sorbonne
2011 Master 1 Droit européen, Université Paris I – Panthéon-Sorbonne

Our values

Transparency

Each stage of your application is clearly explained.

Rigour

We analyse every detail to ensure the best possible solutions.

Proximity

A customer relationship based on trust and listening.

Specific commitments

  • We keep a close eye on tax reforms to anticipate your needs.
  • A proactive strategy designed to minimise your risks and maximise your financial opportunities.

Find out more about our expertise or contact us today to discuss your requirements.