Prof. Dr. Wilhelm Haarmann focuses his practice on international tax matters and corporate law, drawing on his triple qualification as a lawyer, tax consultant (Steuerberater) and certified accountant. He is seasoned in company law matters having been involved in major transactions and corporate governance questions as a member of supervisory boards. He has advised the IPO of SAP AG/SE in 1988 and was in SAP’s supervisory board for 30 years, heading for many years the investment and finance committee. Wilhelm advises on tax and company law (including governance issues), as well as on corporate transactions (including major mergers and acquisitions), and he is active as an arbitrator in arbitration proceedings. Wilhelm represents clients in all courts, including before German tax tribunals (Finanzgericht and Bundesfinanzhof) and the European Court of Justice, on tax-related disputes.

Show More


  • Advised Vodafone, on its acquisition of Mannesmann*
  • Advised a large software house in Germany on its sale*
  • Advised a German family company on corporate restructuring in the light of changes of Germany’s law on inheritance tax
  • Advised several companies on tax disputes
  • Advised a major German company in a tax audit where several hundred million Euro taxes were at risk

Show More


  • Handelsblatt/Best Lawyers™ in Germany, 2021 and 2022, Leading Lawyer for Tax Law
  • Chambers Europe 2020 and 2021, Germany: Tax
  • JUVE Handbook Tax 2021
  • The Legal 500 EMEA 2021


  • Member of the German Board of IFA (International Fiscal Association)
  • President of the Bavarian Board of IFA (International Fiscal Association)


Honorary Professor for Tax law, University Bamberg, 2000
Certified public accountant, 1983
Certified tax advisor 1981
University of Münster, Dr. jur. (PhD), 1979
Ministry of Justice Düsseldorf, Second State Exam, 1976
Higher Regional Court Hamm, First State Exam, 1973
Universities of Freiburg and Münster, Law and Economics, 1969-1973

Germany since 1977


Prof. Dr. Wilhelm Haarmann

Partner | Frankfurt

Frankfurt a. M.: +49 69 951145 266

Frankfurt a. M.: +49 69 271599 633

Prof. Dr. Wilhelm Haarmann

Insights & Events / Media

F.A.S., Frankfurter Allgemeine Sonntagszeitung / 6. Dezember 2020

Handlesblatt / 1. Oktober 2020

Frankfurter Allgemeine Sonntagszeitung / April 5, 2020

On the Subject / March 26, 2020

Börsen-Zeitung, Ausgabe 59, Seite 6 / March 25, 2020

Frankfurter Allgemeine Zeitung / February 9, 2020

Frankfurt, Germany / McDermott Event / October 15, 2019