William Fry Tax Advisors brings together tax lawyers, accountants and consultants in one highly innovative team. We work with domestic and international corporations, entrepreneurs, family businesses, trusts and high net worth individuals.

We provide the following tax services:

  • Using Ireland as part of a group business strategy
  • Tax due diligence reports
  • Mergers and acquisitions - tax structuring and negotiation
  • Corporate reorganisations
  • Revenue Audit health checks and advice on audits and settlements
  • Transfer pricing reviews and mutual assistance procedures
  • Structured finance including securitisations & financial engineering
  • Indirect Taxation planning and compliance
  • Private client including asset protection & personal tax planning
  • Tax litigation including negotiation, arbitration & settlements
  • Employee benefits and remuneration
  • IP structuring
  • Annual Corporate and Personal Tax Compliance

We work with colleagues in other practice areas and industry sectors, forming multi-disciplinary teams to design and implement creative tax solutions, with particular experience in financial services, retail, technology, communications, construction, leisure & entertainment, personal and trust services.

William Fry Tax Advisors, is, exclusively, Taxand Ireland. With more than 400 tax partners and over 2000 advisors in nearly 50 countries, Taxand is the world’s largest organisation of tax advisors to multinational businesses.

Our experience includes advising:

  • IAG on the Irish aspects of the proposed acquisition of Aer Lingus.
  • EirGen Pharma on its sale to US drugs company OPKO for US$135m.
  • BAML on the acquisition by Medtronic Inc of Covidien plc.
  • Forest on its US$25bn merger with Actavis plc.
  • King Digital Entertainment plc on the company’s reorganisation and redomiciliation to Ireland in connection with its US$7.2bn admission to trading on the New York Stock Exchange in March 2014.DCC plc on the sale of Robert Roberts and Kelkin to Valeo Foods.

Tax Update Concerning Revenue Opinions/Confirmations

Revenue sets maximum validity period of 5 years for opinions/confirmations

Knowledge Development Box Update

Bill to allow small companies avail of the Knowledge Development Box published

Help to Buy Scheme – Obligations for Developers

Developers must meet certain criteria to be included in the Help to Buy Scheme

Tax: Legislation Programme Spring/Summer 2017

Bills currently before the Oireachtas and Bills expected to be published

Investment Funds Update: Finance Bill 2016

Following publication of the Finance Bill 2016 we consider the proposed new tax regime for Irish Real Estate Funds

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  • "The lawyers are technically and commercially the best I have dealt with. I have always been very impressed with their well-thought-out and thorough advice. You can always get through to the partners and their brilliant associates." "This team is fantastic – always available and really responsive." Chambers Europe, 2015
  • "Martin Phelan's controversy practice is at the forefront of domestic contentious tax work and boasts an enviable client list." Who's Who Legal - Corporate Tax 2015 
  • William Fry’s ‘hands-on, straight-talking and practical approach’ finds favour with clients. Legal 500 EMEA, 2015 
  • "One of the most conscientious firms I have dealt with." "The team is knowledgeable and integrates well with other departments, which is very helpful."  Chambers Europe, 2014 
  • Sources say: “What we look for is advice which is quick and to the point, and that's what we get." "The lawyers can handle anything we throw at them.” Chambers Europe, 2013
  • William Fry has ‘comprehensive knowledge of Irish taxation'. Sources say: 'The team is extremely smart and most importantly it is good at recognising a client's objective.' Chambers Europe, 2012


  • Martin Phelan

    • Leading consultant Martin Phelan is praised for "cutting to the chase" and being "technically very good."  Chambers Global, 2015 - Tax
      Martin Phelan is 'extremely efficient and effective'.  Legal 500 EMEA, 2015 - Tax
    • Martin Phelan is widely agreed to be one of the leading tax practitioners in Ireland. Clients appreciate that "he has his eye on the ball. He works with you one-on-one and has an ability to react very quickly." Chambers Global, 2014 - Tax
    • Team head Martin Phelan is ‘charismatic and very good in commercial negotiation’. Legal 500 EMEA, 2014 - Tax
    • Martin Phelan “has a very practical mindset, understands the client's needs very well and offers clever solutions.”  Chambers Global, 2013 - Tax
    • Martin Phelan is a towering force in the local market and enjoys recognition on a global scale. With a special interest in tax aspects of M&A and restructuring, he is described as a 'constructive, creative and compliant adviser.' Chambers Global, 2012 - Tax
  • Sonya Manzor

    • Sonya Manzor is "decisive and proficient, and knows about corporate issues. She also won't back down, but nor will she pick a fight for the sake of it." Chambers Global, 2015 - Tax
    • Sonya Manzor 'provides creative solutions'. Legal 500 EMEA, 2015 - Tax
    • Sonya Manzor "has a very broad depth of knowledge and experience - she is exceptional on corporate transactions." Chambers Europe, 2014 - Tax
    • Sonya Manzor is ‘excellent on technical matters’. Legal 500 EMEA, 2014 - Tax
    • Sonya Manzor has ‘tremendous energy’ and ‘quick understanding’. Legal 500 EMEA, 2013 - Tax
    • Sonya Manzor "finds solutions to all sides of an issue and works seamlessly with her corporate colleagues to solve the problem. She also has an incredible work ethic and is always positive and constructive.”  Chambers Global, 2013 - Tax
    • According to impressed clients, Sonya 'certainly understands the nuances of the Irish tax code, and how it relates to our strategy and objectives.' Chambers Global, 2012 - Tax
  • Brian Duffy

    • Brian Duffy is a strong member of this excellent practice, and continues to impress market commentators with his dynamic and commercial approach. He provides tax advice to a broad range of clients from the hospitality and tourism, telecommunications, media, private equity and insurance sectors.  Chambers Europe, 2012 - Tax
  • Nora Lillis

    • Nora "is very efficient and always on the ball, and gives you straight advice. She isn't afraid to say that she needs to look up an answer - she's a pragmatist, with the ability to say that she'll need to get back to you." Chambers Europe, 2015 - Tax
    • Nora Lillis heads the firm's Private Client group. She has a strong reputation for her work in the area, with sources highlighting her work on trusts. Chambers Europe, 2014 - Tax
    • Nora Lillis "is efficient, proactive and user-friendly". Chambers Global, 2013 - Tax
  • Cliona Donnelly

    • Cliona Donnelly is 'technically excellent'. Legal 500 EMEA, 2015 - Tax
    • Cliona Donnelly is "energetic, creative and good at spotting opportunities," according to clients. She offers expertise in cross-border matters, often involving US law, with particular experience in the tax aspects of international organisations establishing in Ireland.  Chambers Global, 2015 - Tax
    • Cliona Donnelly "finds solutions in a hard-working and customer-focused manner." She was part of the team advising Gordon Brothers on the acquisition of Clery's department store. Chambers Global, 2014 - Tax
    • Promising associate Cliona Donnelly draws on over a decade of experience when advising clients in tax structuring matters covering corporate restructuring, M&A and due diligence. Chambers Global, 2012 - Tax

Key Contacts

Martin Phelan Tax Principal

Sonya Manzor Partner

Brian Duffy Partner

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