Harald Willumsen works with tax law, acquisitions/mergers/demergers and litigation. He is admitted to the Supreme Court.

Mr. Willumsen is ranked as one of Norway's leading experts on tax law in Chambers Europe.

Harald Willumsen "stands out in terms of tax knowledge; he is very pragmatic and finds good solutions", according to clients. He is appreciated by further sources for his "good understanding of not only tax laws, but how tax authorities think about things".

Chambers Europe 2017


  • Mr. Willumsen has worked with tax issues and transactions in most industries, particularly in real estate, trade and industry, banking and shipping/offshore, and has litigated many important issues of principle. He has worked a lot with taxation of Private Equity investors.

Professional Experience

  • Partner, Wiersholm, 1990
  • Lawyer and later Partner, Haga, Wahlstrøm & Co., 1987-1990
  • Consultant/Tax Manager, a major accounting firm, 1983-1987
  • Deputy Judge, the Public Registrar of Oslo, 1981
  • The Ministry of Finance's Tax Department, 1979-1983


  • Admitted to the Supreme Court, 1997
  • Cand. jur., University of Oslo, 1978