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Joe Duffy is a partner in the tax group at Matheson. Joe has 20 years’ experience in corporate tax law and advises on international restructurings, mergers and acquisitions, tax controversy and transfer pricing. Joe’s clients include many of the leading multinational corporations established in Ireland, primarily in the pharmaceutical, technology, industrial and service sectors.

Joe speaks regularly on international tax matters in Ireland and abroad. He has also written extensively on international tax matters. Joe has been an active contributor to Irish and OECD tax policy directly and through industry bodies for many years and is an officer on the International Bar Association Taxes Committee. Joe is the only Irish tax advisor ranked as a Who’s Who Thought Leader in Tax Controversy for 2019.

Joe is a qualified solicitor, chartered accountant and tax adviser in Ireland, and has qualified as an attorney in New York. Joe previously worked in a Big Four accountancy practice and as in-house tax counsel for a US multinational.

Experience Highlights

Joe has recently advised and assisted clients on the following:

  • Advising US and European multinational pharma groups on establishment of Irish principal IP and sales structure, reorganising existing supply chain and product flows, contractual infrastructure, aligning substance with contracts / transfer pricing.
  • Advising US multinational software groups on establishment of Irish principal IP and sales structure and conversion of European operations from commissionaire and / or full risk distributor to limited risk distributor model.
  • Advising US and European multinationals in pharma, ICT and luxury goods sectors with Irish principal structures on international transfer pricing disputes and defending the Irish tax base.  Negotiating advance pricing agreement with Japan for newly established Irish principal.
  • Advising on pre-tax audit measures available to clients to support Irish operating structure from a transfer pricing perspective.

Joe Duffy is highly regarded in Transfer Pricing
World TP 2022

Joe Duffy is highly regarded for Tax Controversy.
World Tax 2022

"Joe Duffy delivers exceptional service and is a great person to deal with. He has helped us on numerous occasions with to-the-point and swift feedback on tax matters."
Tax: The European Legal 500 2021

Joe Duffy is recommended.
Tax: The European Legal 500 2020

Joe Duffy is named a leading individual.
Tax: The European Legal 500 2020

Joe Duffy is "a smart professional keen to meet with the client’s needs",
Tax: The European Legal 500 2020

Joe Duffy is highly regarded for Tax Controversy.
World Tax 2019

Joe Duffy is highly regarded.
World TP 2019

Joe Duffy is recommended.
Tax: The European Legal 500 2019

Joe Duffy is a very responsive and commercial adviser.
Tax: Chambers Europe 2018

Corporate Tax Expert.
Who's Who Legal 2017

Tax Controversy Leader, Ireland
ITR Tax Controversy Leaders 2017


University College Dublin - Bachelor of Civil Law (BCL)

UCD Smurfit Business School (Postgraduate Diploma in Business Studies, DBS)

Dublin City University Business School (Professional Diploma in Accounting, PDA)