Janne advises on domestic and international tax matters in corporate and personal income taxation. He specialises in tax issues related to mergers and acquisitions, corporate restructurings, international tax law and tax litigation.
Janne joined Borenius in 2005, and before that he worked as a Tax Manager at the auditing company KPMG. He has also worked for the Ministry of Finance preparing both domestic tax laws and EU tax directives.
Janne holds a Doctor of Laws degree, having written his doctoral thesis on international tax law in 1998. He has also authored books on tax law and published several articles in Finnish and international publications. Janne is co-author of the renowned “Corporate taxation I-II” (Talentum). He also lectures regularly on tax-related issues.
Janne is a member of the board of the Finnish branch of the International Fiscal Association (IFA), and he is an adjunct professor of tax law at the University of Helsinki.
Janne heads the firm’s Tax team.
Chambers Europe | 2018
“One of the best.”
“Very good in tax litigation and gives concrete advice.”
Chambers Europe | 2017
“A leading character in Finnish taxation, with deep knowledge and insights.”
Chambers Europe | 2016
“One of the best tax experts in Finland.”
Chambers Europe | 2015
“A true expert who can also talk about tax in layman’s terms. He is innovative and always looking for solutions.”
Legal 500 | 2017
“One of leading experts in the field.”
Legal 500 | 2015
“The best tax lawyer in Finland; his personal knowledge of tax law is unsurpassed”
International Tax Review
- Tax Controversy Leader
Who’s Who Legal
- Corporate Tax
- Advised Fortum Oyj in a tax controversy.
- Advised Nokian Renkaat Oyj in a tax controversy.
- Advised Paroc Group Oyj and its owners in tax issues related to the sale of shares to CVC.
- Advised Nasdaq Inc. in tax issues.
- Advised Vitruvian Partners in tax issues related to the acquisition of Accountor Holding Oy.
- Advised CapMan and Langholm in tax issues related to the sale of Lumene Oy.
- Advised British Petroleum (BP) construction contract tax matters.
- Partner, Borenius, 2008–
- Attorney, Borenius, 2005–2008
- Tax Manager, KPMG, 2003–2005
- Senior Adviser, Ministry of Finance, taxation department, 1998–2002
- Researcher, University of Helsinki, 1994–1998
- Bar Admission, 2007, Helsinki, Finland
- Docent of Tax Law, 2002, University of Helsinki, Finland
- Doctor of Laws, 1998, University of Helsinki, Finland
- Master of Laws, 1994, University of Helsinki, Finland
- Finnish, English, Swedish