The core activity of the company "Zumbrunnen Treuhand GmbH" is the provision of services in the areas of trust, accounting and financial management, including: accounting and financial management, annual financial statements and tax consulting, financial accounting and budget planning, cost accounting and personnel administration, payroll accounting and payroll processing, tax returns and value-added tax, auditing and revision, coaching and support for companies in the areas of accounting, personnel and payroll. The company also offers specialized services for specific industries, such as engineering, planning and architecture firms, IT, organizational and financial service providers, as well as service providers for technology, mechanics and construction.