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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 and Education

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.
  • 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)

News and Insights

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Insights
07/01/2025

Tax Controversy and Dispute Resolution Annual Report 2024

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Experience Highlight
05/01/2025

Equinix on its acquisition of BT’s Irish data centres

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Insights
21/10/2024

Legal 500: Tax Comparative Guide

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Insights
03/10/2024

Lexology Panoramic: Tax Controversy 2025

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Insights
09/07/2024

Chambers Transfer Pricing 2024

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Insights
04/03/2024

The Legal 500: Tax Disputes Comparative Guide 2023

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Insights
04/03/2024

The Legal 500: Tax Comparative Guide 2023

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Insights
16/10/2023

Lexology GTDT – Tax Controversy 2024

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Insights
26/09/2023

New EU Proposal for a Transfer Pricing Directive

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Insights
15/08/2023

The Transfer Pricing Law Review, Seventh Edition

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Accolades

Joe Duffy is highly regarded for Tax Controversy.

World Tax

2022

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