
Ludwig + Partner Ltd. is a boutique corporate and commercial firm with expertise in tax planning and advisory matters, particularly for small and mid-cap clients in Switzerland and western Europe. The tax team is led by Beatrice Van der Haegen, who advises on the tax optimisation of succession plans and restructuring measures, and Thomas Ziegler, whose practice spans corporate and real estate taxation. Daniel Dillier brings further knowledge of M&A and real estate tax matters, while Karolina Dobry Oesch is noted for her work in inheritance law, as well as estate and succession planning. Hubertus Ludwig advises on both domestic and international tax law, alongside a broad range of general business law matters.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Extensive experience in international tax matters. Not theorists, but very hands-on. A strong understanding of complex issues. Excellent and uncomplicated cooperation with law firms abroad.’
- ‘The employees and partners at Ludwig + Partner are excellently prepared to address current tax and legal issues and challenges in a complex international environment.’
- ‘The people at Ludwig + Partner have an excellent, individually tailored approach to the client.’
- ‘Thomas Ziegler has a high level of expertise, which is reflected in the quality of his work. He values transparency and honesty and communicates clearly and appropriately. He can explain complex matters in a way that even a layperson understands. His enthusiasm for his work makes him a trusted advisor.’
- ‘What I particularly value about this practice is their very personalised approach. I feel genuinely supported and well taken care of. They have a deep understanding of what makes us unique as a tax-exempt institute and consistently serve as excellent advisors in navigating the specific challenges and opportunities that come with our status.’
- ‘Beatrice Van der Haegen provides an excellent service with her tax advice, balancing between what is required to be mentioned and what is suggested to be done.’
Key clients
- Bethesda Hospital and Age Care Group
- Ophardt Hygiene Group
- FBB Frischbeton + Baustoffe Group
- Javad Marandi Family Office
- staBOO Holding AG
- Interspiro Group
- Primeo Energy
- Benedictine Monastery Mariastein
- MIGX AG
- Rieker Shoes
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Practice head
Beatrice Van der Haegen; Thomas Ziegler
Other key lawyers
Daniel Dillier; Karolina Dobry Oesch; Hubertus Ludwig
