Altorfer Duss & Beilstein


Walchestrasse 15
CH-8006 Zurich

+41 44 267 63 00

Key contacts:

Partner: Jürg Altorfer
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Partner: Fabian Duss
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Partner: Andreas Helbing
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Partner: Pascal Taddei
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Partner: Urs Zeltner
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Quick facts:

Number of advisers: 17
Network memberships: Nexia International
Languages: English, German, French, Italian, Spanish

Founded in 1954, ADB Altorfer Duss & Beilstein AG is one of the leading independent tax law firms in Switzerland offering expert advice in all areas of domestic and international tax law.


Compliance management:

  • Business model optimisation

Corporate tax matters:

  • Restructuring
  • M&A
  • APAs
  • Financial services
  • Cryptocurrency

Dispute resolution:

  • Litigation
  • Audit defence
  • Audit support
  • Dispute resolution
  • Pre-Litigation

Tax advisory:

  • Tax consulting
  • International tax advisory

Indirect tax:

  • VAT
  • Customs
  • Supply chains


  • Legal services
  • Transfer pricing
  • Real estate
  • Capital markets