Tax attorney


Tax attorney

Olivier Thévoz

Founding partner – Attorney-at-law
Admitted to the bar in the canton of Vaud
Foreign Legal Consultant in Texas
Master of law, summa cum laude (Lausanne, 2011)
Swiss certified accountant (expert fiduciaire diplômé, 2006)

Contact Olivier Thévoz

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Areas of focus

  • Tax optimization of Swiss and international groups of companies
  • Tax advice on the restructuring of Swiss and international groups of companies
  • Advice in tax treaty dispute resolution (MAP and arbitration)
  • Assistance and representation in tax litigation before administrative and judicial authorities in Switzerland
  • Administrative assistance and information exchange
  • Tax due diligence with a view to the acquisition of Swiss companies
  • Tax assistance on the sale of Swiss companies
  • Negotiating and obtaining special tax status for companies in Switzerland
  • Tax and estate planning for individuals resident in Switzerland
  • Assistance to individuals residing in Switzerland intending to move abroad for tax purposes

Professional experience

Olivier Thevoz, founding partner of THEVOZ Attorneys Group, practices in the field of international tax law. He advises and defends the interests of international groups. Furthermore, he is also active in the academical field; he is writing a thesis on international tax law regarding tax treaty shopping.

Olivier Thévoz launched his first entrepreneurial activity when he was 19. At the age of 23, he passed his Swiss federal certificate as a fiduciary with flying colors. He then came to manage the Morges branch of the accounting and tax consultancy service provider Fidexaudit SA and obtained his Swiss federal diploma as a certified fiduciary in 2006. He took up studying at the University of Lausanne whilst continuing to perform professionally, in particular in a law firm specialized in tax law. He obtained his Bachelor’s degree in Law – magna cum laude – in 2009, followed by his Master’s degree – summa cum laude – in 2011 and was awarded the Ecublens Prize for Outstanding Achievement. He subsequently prepared the Bar exam (stage d’avocat) at the law firm of Mr. Robert Fox in Lausanne and joined the law firm Heim Paschoud Thévoz Weniger as a partner.

In 2015, he decided to found an international law firm specialized in business law; the Groupe THEVOZ Attorneys was born.

For many years, Olivier Thévoz has been appointed as Director of several financial companies and acts as expert during the examinations for the certifications of Swiss federal fiduciary agent (brevet fédéral d’agent fiduciaire) and Swiss federal fiduciary expert (diplôme fédéral d’expert fiduciaire). He has also given courses at AKAD Banking and Finance and the Swiss Chamber of Certified Accounts and Tax Experts (Chambre fiduciaire).


  • Règles professionnelles applicables aux activités atypiques,
    Translation: “Professional regulations on atypical activities ”, in Revue de l’Avocat FSA (Swiss Bar Association) 10/18, p. 450 ss
  • Transparence des personnes morales et publicité des participations. Conséquences pratiques liées aux obligations d’annonce des actionnaires,
    Translation: “Transparency of legal entities and publicity of shareholdings. Practical consequences of shareholder reporting obligations”, in Expert Focus 2016/8, p. 574 ss, Read the Article


  • June 11, 2018 : Lector and oranizer of the seminar at Espace CDPQ, Montreal (CAN)
    La Suisse : Championne mondiale de l’innovation et de la compétitivité
  • May 8, 2017 : Lector and organizer of the seminar at Hôtel Métropole, in Geneva (CH)
    Effects of the Tax Treaty between the U.S. and Switzerland
  • April 6, 2017 : Lector and organizer of the seminar at the Swiss General Consulate, in Montreal (CAN)
    “La Suisse, une fiscalité attractive ? Quels sont les grands pièges à éviter ? Comment créer sa société en Suisse ?”
    Translation: “Switzerland, an attractive tax system? What are the big pitfalls to avoid? How to create your company in Switzerland?
  • December 2, 2016 : Lector of the seminar at Hôtel Aquatis, in Lausanne (CH)
    “Responsabilité pénale des mandataires. Les nouvelles obligations d’annonce pour les actionnaires et associés de sociétés suisses”
    Translation: “Criminal liability of agents. The new announcement obligations for shareholders and partners of Swiss companies
  • October, 4 2016 : Lector of the seminar at Beau-Rivage Palace, in Lausanne (CH)
    “Impôts sur les successions et donations dans le canton de Vaud”
    Translation: “Inheritance and gift taxes in the canton of Vaud
  • June 3, 2016 : Lector and co-organizer of the seminar at Hôtel de la Paix, in Lausanne (CH)
    June 2, 2016 : Lector and co-organizer of the seminar at Hôtel Mandarin Oriental, in Geneva (CH)
    “Le client, votre meilleur ennemi : comment pallier les risques de responsabilité ?”
    Translation: “The client, your best enemy: how to mitigate liability risks?
  • April 28, 2016 : Lector and co-organizer of the seminar at Hôtel de la Paix, in Lausanne (CH)
    April 27, 2017 : Lector and co-organizer of the seminar at Swissôtel Métropole, in Genève (CH)
    “Responsabilité pénale fiscale des mandataires et des administrateurs des sociétés offshore”
    Translation: “Criminal tax liability of the professional consultants and the directors of offshore companies
  • Novembre 12, 2015 : Lector and co-organizer of the seminar at Swisshôtel Métropole, in Geneva (CH)
    November 10, 2015 : Lector and co-organizer of the seminar at Hôtel de la Paix, in Lausanne (CH)
    Secret bancaire et échange automatique d’information”
    Translation: “Banking secrecy and automatic exchange of information
  • October 6, 2015 : Lector of the seminar in Aubonne (CH)
    Fiscalité – L’imposition des prestations de retraite”
    Translation: “Taxation of pension benefits
  • October 2, 2014 : Lector and co-organizer of the seminar at Hôtel Beau-Rivage Palace, in Lausanne (CH)
    Nouveautés dans les relations fiscales franco-suisses”
    Translation: “Developments in Franco-Swiss tax relations
  • May 13, 2009 : Lector and organizer of the seminar in Lausanne (CH)
    “La nouvelle loi fédérale sur la simplification du rappel d’impôt en cas de succession et sur l’introduction de la dénonciation spontanée non punissable ; La nouvelle loi portant modification de la procédure de rappel d’impôt et de la procédure pénale sur la soustraction d’impôt d’imposition directe ; L’évolution de la jurisprudence en matière de soustraction fiscale. ”
    Translation: “The new federal law on the simplification of the additional tax assessments for inheritance and on the introduction of non-punishable spontaneous denunciation; The new law amending the tax assessments procedure and the criminal procedure on the direct tax evasion; The evolution of the jurisprudence on tax evasion.
  • April 23, 2008 : Lector and co-organizer of the seminar at Casino de Morges, in Morges (CH)
    “La nouvelle loi sur la réforme de l’imposition des entreprises II et ses implications pratiques”
    Translation: “The new law on corporate tax reform II and its practical implications
  • January 18, 2007 : Lector of the seminar at Centre Patronal, in Paudex (CH)
    “Présentation de l’art. 321 code pénal et du nouveau droit de la Sàrl”
    Translation: “Presentation of the art. 321 of the criminal law and the new law of the LLC
  • October 4, 2016 : Lector of the seminar at Refuge de Bussigny, in Bussigny (CH)
    “Le réviseur et ses obligations s’il constate des violations de la loi lors de ses travaux d’audit et les moyens de pressions par la justice sur les réviseurs”
    Translation: “The auditor and his duties if he finds violations of the law during his audit work and the ways to pressure justice on the auditors
  • January 18, 2006 : Lector of the seminar at Centre de formation du Domaine de Greybin, in Molondin (CH)
    “LFus – nouveautés”
    Translation: “Mergers Act – development


  • 2018 à ce jour : Membre de l’Amercian Bar Association
  • 2017 à ce jour : Membre de la Swiss-American Chamber of Commerce
  • 2013 à ce jour : Membre de l’Ordre des avocats du canton de Vaud (OAV)
  • 2013 à ce jour : Membre de la Fédération Suisse des Avocats
  • 2011 à ce jour : Membre de l’International Fiscal Association – IFA