Firm Profile > ADB Altorfer Duss & Beilstein > Zurich, Switzerland

ADB Altorfer Duss & Beilstein

Tax Tier 3

ADB Altorfer Duss & Beilstein is a boutique firm specialised in handling tax matters for institutions from the financial services, chemical, manufacturing and engineering as well as private clients. The team has comprehensive experience in tax law, litigation and VAT, among others. Pascal Taddei is a key contact for the tax-related aspects of restructuring, M&A and relocation, while Fabian Duss has a focus on tax-efficient supply chain management and transfer pricing. Other prominent practitioners are Jürg AltorferAndreas Helbing and Marco Greter.

Practice head(s):

Fabian Duss; Pascal Taddei; Andreas Helbing; Jürg Altdorfer; Marco Greter; Urs Zeltner


The team is very implementation-oriented and pragmatic on a very high level. The different special fields are directly linked. Thus complex questions can be easily discussed and solved.

Pascal Thaddei combines strong experience in the M&A field with a good network.’

Jürg Altorfer has a great deal of expertise in various fields as well as experience.

Key clients

G+E GETEC Holding GmbH

Twenty14 Holdings Ltd.

Castle Alternative Invest (CAI) and Castle Private Equity (CPE)

The firm: Founded in 1954, ADB Altorfer Duss & Beilstein AG is one of the leading tax law firms in Switzerland, offering expert advice in all areas of domestic and international tax law. Located in Zurich, the firm specialises in providing a wide range of tax services in all areas of corporate tax, individual tax, VAT, transfer pricing and tax litigation.

The ADB team has decades of professional experience and comprises five partners, two counsels and ten highly qualified tax experts. Clients include national and international public-listed and privately run businesses in various sectors, in addition to Swiss and international high-net-worth individuals and institutional investors. The firm provides a comprehensive consultancy service focused on Swiss and international tax law and bordering areas of Swiss business law.

Moreover, ADB has been contributing significantly to various publications in the area of Swiss and international tax law which includes tax commentaries on some of the most important sections of tax law.

As a result of the firm’s longevity, ADB has formed well-established relationships with a large number of small and mid-sized Swiss law firms. Its tax expertise is also respected and utilised by a large number of banks, asset managers, family offices as well as accounting and fiduciary firms.

Areas of practice: Tax: ADB provides personal and individually tailored advice in relation to all aspects of life with tax implications and all business decisions: from high net worth individuals to institutional investors; from the SME to the listed company; from incorporation through to succession planning; from the concept through to implementation and its reproduction in tax returns and tax assessments.

Moreover, ADB advises clients, which originate from various sectors, regarding national and international corporate tax law (corporate income and capital taxes, withholding tax, issuance stamp tax and securities transfer tax). Their services include advice in relation to value-added tax and customs duties.

At last ADB advises private individuals in all areas of tax law, the law on social security contributions and legal issues arising in the context of tax planning.

Department Name Email Telephone
M&A Pascal Taddei
M&A Jürg Altorfer
Capital markets and financial products Fabian Duss
Cross-border structuring Andreas Helbing
Cross-border structuring Pascal Taddei
Transfer pricing Marc Dietschi
Transfer pricing Fabian Duss
Tax litigation Marco Greter
Tax litigation Andreas Helbing
VAT and customs Britta Rehfisch
Legal services Urs Zeltner
Private clients Jürg Altorfer
Private clients Andreas Helbing
Real estate Mathias Häni
Real estate Marco Greter
Intra-group restructuring Fabian Streule
Intra-group restructuring Pascal Taddei
Photo Name Position Profile
Mr Jürg Altorfer  photo Mr Jürg Altorfer
Mr Marc Dietschi  photo Mr Marc Dietschi
Mr Fabian Duss  photo Mr Fabian Duss
Dr Marco Greter  photo Dr Marco Greter
Mr Mathias Häni  photo Mr Mathias Häni
Mr Andreas Helbing  photo Mr Andreas Helbing
Ms Britta Rehfisch  photo Ms Britta Rehfisch
Mr Fabian Streule  photo Mr Fabian Streule
 Pascal Taddei photo Pascal Taddei Partner
Mr Urs Zeltner  photo Mr Urs Zeltner
Number of lawyers : 18
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