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 by Chambers and Partners.

Harald Willumsen advises clients from a range of industries and sectors on contentious and transactional tax matters.

Chambers Europe, 2018


  • 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