Trusted for over 35 years

Seiler Treuhand AG looks after the affairs of more than 250 national and international firms and private individuals throughout Switzerland. Our staff attend regular training events and workshops to keep abreast of the latest innovations and changes. So they will give you the correct, expert advice that suits your requirements.

Milestones in our journey

1988 Foundation

Paul Seiler, a Swiss certified auditor and tax expert, starts his one-man business, Seiler Treuhand.
He becomes a member of ExpertSuisse, the Swiss Expert Association for Audit, Tax and Fiduciary, and Treuhand Suisse, the Swiss Fiduciary Association.

1993 conversion into a corporation

The sole-proprietorship Seiler Treuhand is reborn as a company limited by shares, Seiler Treuhand AG.

2007 Certification

The company receives its expert audit licence from the Federal Audit Oversight Authority (FAOA).

2013 The Next Generation Takes Over

René Seiler leads the family firm into a new generation.

2023 «35 Years of Seiler Treuhand»

We celebrate our thirty-fifth year in business.

Can we support you?
Arrange a non-binding consultation appointment.