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Fiduco AG comprises a number of bilingual accountants and has operated from the same Biel premises for over 50 years. It is an expert audit firm registered with Federal Audit Oversight Authority (registered number 500886).

Its consulting services encompass accountancy/auditing, business consulting and controlling and taxation. Fiduco has also been providing interim management services for several decades, placing competent stand-in CFOs at the disposal of its clients.

Fiduco is a sister company of Adasco AG, which shares its headquarters, and is active mainly in the Bern, Biel-Seeland and Bernese Jura regions.

Fiduco Treuhandgesellschaft für Industrie und Handel AG
Mattenstrasse 135
2503 Biel-Bienne
+41 32 366 50 00




  • Full and limited audits
  • Special audits and investigations
  • Incorporation, liquidation and reviews

Business consulting and controlling

  • Financial planning (gross profit analyses, net earnings)
  • Budgeting, investment appraisal
  • Liquidity planning, succession process, restructuring
  • Assistance with the sale/purchase of companies or part-companies
  • Due diligence, management accounts
  • Contribution margin accounting and introduction of cost centre accounting




  • Support and representation of clients in all taxation matters
  • Completion of tax returns for individuals and legal entities
  • Project appraisal, tax optimisation, medium- and long-term tax planning
  • Real estate gains tax, VAT, stamp duties
  • Inheritance and gift tax

Interim Management

  • Competent deputation for your CEO