Fiduciary Offices

Bucher Tax AG 

Lucerne · Since 2015

The core activity of Bucher Tax AG is tax consulting for companies and private individuals, including international tax issues, succession planning, mergers and acquisitions, relocations and other tax-related matters.

Bühler Treuhand 

Zug · Since 1999

Bühler Treuhand provides fiduciary services including financial accounting for sole proprietorships and legal entities, payroll administration (using Abacus), tax preparation, VAT filings and VAT representation for foreign companies. The practice also offers corporate advisory services (company formation, choice of legal form, restructuring, succession planning) and performs limited audits and special examinations.

Bühler Treuhand AG 

Adliswil · Since 1988

Bühler Treuhand AG provides fiduciary and advisory services including financial accounting, payroll administration, tax advice, corporate consulting and audits. Offerings include bookkeeping and financial statements, VAT filings and fiscal representation, payroll processing, company formation and restructuring advice, plus limited and special audits.

Burkhart & Partners AG 

Freienbach · Since 2025

The core activity of Burkhart & Partners is the provision of services in the field of finance and accounting, in particular: Accounting and taxes (e.g. flat-rate mandates, individual orders, annual financial statements); Financial planning and consulting (e.g. strategic financial planning, financial reporting, cash flow management); Process optimization and digitization (e.g. selection and integration of tools and applications); Fiscal representation and domicile services (e.g. representation of foreign companies in Switzerland, domicile addresses in Zurich and Zug); CFO services (e.g. support in the financial management of companies). The company thus offers a wide range of services aimed at supporting companies in their financial and administrative tasks.

Bussmann & Frey AG 

Olten · Since 1999

The core activity of Bussmann & Frey AG encompasses two main areas: 1. **Trust Services**: The company provides trust services, including accounting, financial statement consulting, tax consulting, and general business consulting. 2. **Real Estate**: Bussmann & Frey AG is also active in the real estate sector, offering services such as brokerage and sale of properties, traffic value appraisals, management of rental properties, renting and buying of properties.

cmt wirtschaftsprüfung ag 

Appenzell · Since 2005

The company's core activity is auditing, including trust and tax services, particularly for small and medium-sized enterprises (SMEs). The company offers comprehensive services such as statutory audit, voluntary audits, statutory special audits and consulting in the areas of trust, tax and auditing.

copartner gmbh 

Schönenbuch · Since 1999

copartner gmbh provides audit, business advisory and fiduciary services, including statutory and limited audits, financial and business planning, accounting, tax and payroll services.

Copartner Immobilien GmbH 

Basel · Since 2005

Copartner Revision AG 

Basel · Since 1992

Copartner Revision AG provides audit services, business advisory services, and fiduciary and tax services. The firm's website outlines its offerings in auditing, consulting and fiduciary matters and notes affiliations such as EXPERT Suisse and SRO PolyReg registration for audits under anti-money-laundering rules.

CRC Consult AG 

Aesch Bl · Since 2011

CRC Immobilien + Beratungs AG 

Aesch Bl · Since 1999

CRC Immobilien + Beratungs AG provides fiduciary and real-estate management services and related business advisory services, including tax advice, payroll and personnel administration, accounting and financial reporting, insurance brokerage, and business consulting.

CRC Treuhand AG 

Aesch Bl · Since 1987

CRC Treuhand AG is a fiduciary services firm offering tax advice, financial accounting and payroll/personnel administration. It also provides business consulting, property management and independent insurance brokerage.

DSH Treuhand Hoch 

Basel · Since 2014

The core activity of DSH-Treuhand is the provision of services in the field of accounting and tax consulting. The company offers entrepreneurial action and personal commitment to support clients in achieving their economic goals. The specific services include the preparation of financial reports, tax returns and other tasks in finance and accounting.

Duttweiler Treuhand AG 

Liestal · Since 1975

Duttweiler Treuhand AG provides accounting and financial reporting services, tax advice and fiduciary services, and also performs audits, business consulting, HR and employment-law advisory, as well as estate and pension-planning assistance.

Duttweiler & Partner Wirtschaftsprüfung AG 

Liestal · Since 2007

Duttweiler & Partner Wirtschaftsprüfung AG is an audit firm that performs statutory and other assurance engagements for companies and organisations. Its services include ordinary and limited statutory audits, corporate-law special audits, merger-law audits, pension fund (BVG) audits and mandate-based audits for associations and similar entities.

ENGEL COPERA AG 

Liebefeld · Since 1987

ENGEL COPERA AG is a consulting firm offering fiduciary services, statutory and pension auditing, business consulting and tax advisory. It serves small and medium-sized enterprises, pension funds, municipalities and healthcare organisations, providing services such as pension and financial planning, succession planning and turnaround management.

erich thalmann consulting ag 

Muri Ag · Since 2021

The core activity of the company "erich thalmann consulting ag" is the provision of services in the areas of finance, taxes and real estate, in particular: financial consulting and management, tax consulting and planning, real estate management and administration, real estate valuation and consulting. The company also offers additional services such as accounting, bookkeeping and administration.

FB CONSULT SA 

Cama · Since 2020

The core activity of FB CONSULT SA is the provision of services in the field of economic consulting, particularly in the areas of: * Trust services (fiduciary services) * Accounting and financial consulting * Real estate management and consulting * Business consulting and strategy development * Tax planning and consulting * Company management and administration * Human resources consulting and management * Company relocation * Company liquidation In addition to these services, the company also offers supplementary services such as insurance consulting and brokerage, legal consulting, and IT consulting, in cooperation with external partners.

In Extenso Suisse SA, succursale de Sion 

Sion · Since 2006

FIDEXPERT SA RIVIERA, succursale de Sion provides fiduciary and advisory services in taxation, accounting and business consulting. Services include tax returns, bookkeeping, company formation and administration, and advisory support for SMEs, private clients and expatriates.

Fidexpert Valais SA 

Sion · Since 2020

Fidexpert Valais SA is a fiduciary firm providing tax, accounting and advisory services to SMEs, private clients and expatriates. Services include tax declarations, company formation and management, and support with the Winbiz accounting software.