Department profile
Advokatfirmaet Thommessen AS

Tax

Europe Guide 2026 : Norway


Advokatfirmaet Thommessen AS

Rankings

About

Provided by Advokatfirmaet Thommessen AS

Thommessen has for a number of years been awarded a top ranking in tax law. Our lawyers assist Norwegian and multinational clients in a broad range of industries on Norwegian and international tax matters and in disputes with the Norwegian authorities.

Tax law is characterised by internationalisation, a changing world economy and technological developments. Norwegian tax law has become more complex and is increasingly affected by international legal developments. An inadequate understanding of applicable regulations may have major repercussions for businesses. We provide clear and practical advice, thereby enabling our clients to attain their commercial objectives in the most effective manner.

With more than 20 lawyers, Thommessen has one of Norway’s very largest and most experienced tax teams. We cover all tax law practice areas, with a focus on transactions, the equity and debt markets, joint ventures, fund establishment, real estate, renewable energy, shipping, as well as oil and gas. We assist a range of clients, from major listed multinationals and international private equity funds to venture capital companies and seed capital companies. Our lawyers assist in disputes with the Norwegian tax authorities and litigate a considerable number of tax matters before the Norwegian courts, including the Supreme Court.

Industries (20)

  • Banks
  • Commercial & Professional Services
  • Construction & Materials
  • Consumer Product Manufacturing
  • Energy
  • Financial Services
  • Food & Drink Producers
  • Forestry & Paper
  • Health Care
  • Insurance
  • Media
  • Pharmaceuticals & Life Sciences
  • Private Clients / Individuals
  • Real Estate Finance
  • Real Estate
  • Retail
  • Software & Computer Services
  • Technology, Hardware & Electronics
  • Telecommunications
  • Transportation

Chambers Review

Provided by Chambers

Tax - Norway

Band 1

Band 1


What the Team is Known For

Advokatfirmaet Thommessen fields a tax group notable for the quality of its work. It handles a broad range of litigation, including contentious transfer pricing, VAT and international tax disputes. The firm is also involved in non-contentious tax matters, including the tax implications of corporate structuring mandates and transaction structuring. Thommessen is further sought out for its expert handling of cross-border issues. The firm acts for major corporates, especially in the shipping and energy spaces, and has additional experience representing the Norwegian Tax Appeal Board.

Strengths

Provided by Chambers

  • Thommessen has shown a very high level of accountability in complicated matters.

    Tax respondentEurope
  • They are exceedingly good at breaking down, understanding and conveying complex and sophisticated matters.

    Tax respondentEurope

Notable Practitioners

Provided by Chambers

  • Band 1Finn Backer-Grøndahl
    Band 1Finn Backer-Grøndahl

    Finn Backer-Grøndahl

    Finn Backer-Grøndahl has extensive experience in complex tax disputes and often acts on behalf of energy sector clients. He assists Norwegian and international clients.

    • Finn is creative and impressive in court cases.

      Tax respondentEurope
  • Band 1Ståle R Kristiansen
    Band 1Ståle R Kristiansen

    Ståle R Kristiansen

    Ståle Kristiansen has experience representing clients in tax disputes before domestic courts, particularly in transfer pricing and allegations of refund abuse.
  • Band 3Bjørn Christian Lilletvedt Tovsen
    Band 3Bjørn Christian Lilletvedt Tovsen

    Bjørn Christian Lilletvedt Tovsen

    Bjørn Christian Lilletvedt Tovsen is head of the firm's indirect tax practice and has notable expertise in VAT matters. He also works on both litigation and restructuring matters, acting for a variety of public and private organisations.

  • Band 4Marius Holm Rynning
    Band 4Marius Holm Rynning

    Marius Holm Rynning

    Marius Holm Rynning heads Thommessen's tax department and its asset management practice. He is frequently engaged by venture capital funds, private equity firms and asset managers on sizeable fundraising, fund formations, mergers and de-mergers.

    • Marius has successfully delivered on several transactions we have executed.

      Tax respondentEurope

Ranked Individuals at Advokatfirmaet Thommessen AS (4)

Norway

Members

Provided by Advokatfirmaet Thommessen AS

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