About us

ADB stands for Altorfer Duss & Beilstein and is based in Zurich. It was founded as a partnership in 1954 and transformed into a corporation in 2005. ADB is one of the leading tax law firms in Switzerland.



We follow an inter-disciplinary approach and promote individual solution-oriented services offering you legal certainty and sustainability. ADB will act as your partner in all areas of tax law and in bordering issues of business law.


The ADB Team

The ADB team is made up of five partners and around twelve tax experts. The partners will advise you personally. The broad expertise of our team will enable you to pursue your interests in all areas of tax law.



In addition to our everyday work, we are also active as judges in tax courts, lecturers, speakers, chairmen of seminars or specialist authors. We thus each provide our own additional contribution to the development of tax law and ensure at all times that our know-how is up to date.