Dr Frank Werger

Frank works within Aegis as an Of-Counsel wage tax specialist. He studied Fiscal Economics at Erasmus University Rotterdam and obtained his PhD from the same university in 2011.

He started his career as an all-round (international) wage tax specialist in 2000 at PwC, after which he continued his career at Deloitte in 2015. Since 1 January 2023, he has run his own advisory practice and joined Aegis as Of-Counsel.
In addition to his work as a tax consultant, he has been active as a part-time lecturer/scientist at the Fiscal Economic Institute B.V. of Erasmus University Rotterdam since 1998. In 2011, he obtained his doctorate from Erasmus University Rotterdam on the topic “Wage sum levy”. ┬áHe is also active within the Dutch Association of Tax Advisers and regularly publishes in tax law journals.


  • Fiscal Economics (drs.), Erasmus University Rotterdam;
  • Promotion “Wage sum levy” (PhD), Erasmus University Rotterdam;
  • Training programme of the Dutch Association of Tax Advisers (NOB).


  • Dutch;
  • English;
  • German.

Other professional activities

  • Member of Dutch Association of Tax Advisers (NOB);
  • Programme coordinator post doc programme Human Resource Global Mobility programme (cooperation Erasmus University Rotterdam and Expertise);
  • Board member of the Wage Taxes Section NOB;
  • Board member of the Tax Technology Section NOB;
  • Lecturer of various wage tax / tax technology SOB courses;
  • Regular speaker at seminars and conferences and author/writer of various academic publications in tax law.


Since the beginning of his working life, Frank combines his scientific interests with the day-to-day practice of his clients. In doing so, he not only enjoys solving the day-to-day issues of his clients, but also focuses on the more (socially relevant) complex cases in the field of (international) employee-related taxes. He is also active in advising on employee participations as well as the Merger and Acquisition (M&A) practice.