IR Silver Member

Janusz Fiszer

Attorney at law and Tax advisor, Partner GESSEL

Associated Members

Member Details

  • Poland

Exclusive IR Member for:

  • Tax (Law)
ul. Sienna 39 00-121 Warszawa
Warsaw Poland

Committee Member

Janusz is a steering committee member for our Tax Group 2019 and has held the position since 2016.

Please sign in to view members only features


Partner, attorney and certified tax advisor, joined GESSEL in January 2014. Dr Fiszer heads GESSEL's tax law practice. He specializes in international tax law and in tax aspects of M&A transactions.

A graduate of the Faculty of Law and Administration at the University of Warsaw, holds a doctorate in law. Since 1980, a researcher and lecturer at the University of Warsaw, currently an associate professor. Since the early 1990s, associated with the international law firm White & Case, from 1998 through 2011 as partner. In 2012-2013, partner in the Tax & Legal Department of the international advisory firm PricewaterhouseCoopers. In 1990-1991, Dr Fiszer served as an expert to the Polish Parliamentary Commission for Economic Policy, Budget, and Finance, advising on the draft legislative Act regarding Personal Income Tax and the draft VAT Act. In 1991-1993, Dr Fiszer was an advisor to the Minister of Finance, working as co-negotiator of numerous international double taxation treaties.

Dr Fiszer was a co-author of the draft legislative Acts regarding National Investment Funds and their Privatization and regarding commodities exchanges; he also contributed as a consultant to work on the draft legislative Acts regarding investment funds and regarding industrial funds. As part of his legal practice, Dr Fiszer has advised on tax disputes and on a number of high-profile M&A transactions in Poland involving publicly listed as well as privately held companies.

Dr Fiszer is the author of over 1,100 publications on legal, tax, and financial matters published in Polish professional journals (“Finanse"“Państwo i Prawo", “Przegląd Podatkowy", “Monitor Podatkowy") and in international journals ("Tax Notes International", "Tax News Service", “East European Business Law",“European Taxation", “Intertax", “Wirtschaft und Recht in Osteuropa"). He is the co-author of the Commentary on the Law on National Investment Funds and their Privatization. Dr Fiszer is a long-time correspondent of professional tax journals such as “Tax Notes International", “Tax News Service", or "East European Business Law". Dr Janusz Fiszer sits on the editorial board of the monthly professional journal "Monitor Podatkowy" and regularly contributes commentary on tax issues to the "Dziennik Gazeta Prawna" daily.

In 1982-1983, Dr Fiszer was a scholar at the University of Kansas School of Business in Lawrence; in 1988-1989, he was a research scholar of the Deutscher Akademischer Austauschdienst, and in 1990 – of the Fritz Thyssen Stiftung to the International and Foreign Tax Law Center at the University of Munich.

Dr Fiszer was a co-founder and president of the Management Board of the Polish branch of the International Fiscal Association (IFA), of which he is still a member. He also sits on the Supervisory Board of the Polish branch of the International Fiscal Association and belongs to the International Tax Planning Association (ITPA). He has participated in numerous Polish and international conferences and seminars focusing on tax matters. In the early 1990s, at the request of the OECD, Dr Fiszer taught specialized courses concerning international tax law and double taxation treaties organized by the OECD Committee on Fiscal Affairs for senior tax administration officials from Central and Eastern European countries. He was a member of the first and third compositions of the State Examination Board for Tax Advisors, and he is currently a member of the fifth State Examination Board for Tax Advisors. Dr Fiszer was an elected member of the National Board of Tax Advisors (KRDP) during its first and second terms; in this capacity, he contributed to the activities of the Confédération Fiscal Européene (CFE).

Dr Fiszer is consistently listed in international and Polish directories of law firms and lawyers – "Chambers Global", "Chambers Europe", "PLC Which Lawyer?", "World Tax – Ranking of Tax Advisory Firms and Tax Advisors", " Who’s Who Legal – The International Who’s Who of Business Lawyers", "Rzeczpospolita", "Dziennik Gazeta Prawna", and "Forbes".

Dr Fiszer is a lecturer in international tax law at the postgraduate programme of tax and tax law studies at the University of Warsaw and at the postgraduate international tax strategies programme at the Warsaw School of Economics.

Besides his native Polish, Dr Janusz Fiszer is fluent in English and in German.

Firm Description

GESSEL was founded in 1993 and soon established itself as one of the leading law firms in Poland. They have played a significant role in transformation of the Polish economy, assisting with the inflow of foreign investment to Poland and in development of the country’s capital markets.

They offer legal advice in almost all areas of the economy, including the financial sector, construction, real estate, foodstuffs, transport, retail, pharmaceuticals, the mass media, and IT.

Members of the GESSEL legal team are qualified to advise on Polish and German law. 

Their practice is focused on M&A, private equity and venture capital, equity transactions, securities law, company and business law, competition law, intellectual property, employment law, pharmaceutical law, tax law, real estate, arbitration, litigation, and FDI. Their German Desk is dedicated to serving German-speaking clients and entities.

GESSEL as well as individual lawyers from the firm are consistently recognised in a number of Polish and international rankings. 

They also pursue a number of pro publico bono initiatives , supporting a number of educational and cultural associations.