About us

Our Values

Our accreditations

Your Team

About Callens, Pirenne & Theunissen

Callens, Pirenne, Theunissen & C° is an audit and accountancy firm that is occupying a prominent place among the top 10 Belgian firms since 1936 and is renowned for its strong sector-oriented approach.

The firm is highly valued by its clients for its personal approach, integrity and independence. In 2008 Callens, Pirenne, Theunissen & C° joined Crowe Global, one of the 10 largest networks of audit and accountancy firms worldwide.

Our strengths

A sector-oriented approach
Our company works with multidisciplinary teams that are familiar with your sector’s specific features. We have tailor-made solutions appropriate for the financial sector, industry, non-profit organisations and public authorities.

A personal approach
Those who regularly use the services of audit or accountancy firms expect the assigned staff member to have a thorough knowledge of the file and to follow it through from start to finish. Callens, Pirenne, Theunissen & C° attaches great importance to continuity and personal approach.

Integrity and independence
Due to the changes in the regulations and as a result of external pressure for sound Corporate Governance, business people are more than ever looking for service providers other than the “Big Four” to ensure reliable and independent services. Because of its integrity and independence Callens, Pirenne, Theunissen & C° is highly appreciated.

Our network

Each member of Crowe Global takes a leading role within its own region and works with local experts who have an excellent command of local legislation. In this way, the organization offers optimal support for clients planning a joint venture or expansion abroad.

Quality and professional services
Each member of Crowe Global excels by a high level of professionalism (audit, tax, risk management and advisory). Standardized procedures have been developed for international projects.

International strength
The work is co-ordinated by Regional Executives, who are responsible for a specific region (Europe, Middle East and Africa (EMEA), Southeast Asia and the Americas). The so-called Key Economic Centers take a central place in the strategic and operational functioning of the network. As a result also smaller international organizations are professionally and smoothly served within our network.