Practice area

World Tax Reviews

A&L Goodbody

A&L Goodbody is a leader in the Irish tax market with a practice that provides support for many of the largest M&A transactions. The firm is also known for its activity within the financial sector, including work for investment banks, equity funds, hedge funds and retail banks, as well as representing numerous corporate businesses. Corporate taxation specialist Paul Fahy leads the tax department, with the support of five other partners. Brian Butler is the Head of VAT.

The firm recently represented Barclays Bank on its €4.9 billion acquisition of residential Irish mortgages and the subsequent securitisation of the portfolio. It also acted as the sole Irish advisers to Iterum Therapeutics, an Irish pharmaceutical company, on its Nasdaq IPO.

Arthur Cox

Arthur Cox has long been regarded as one of the leading transactional tax firms in Ireland, with a history of advising on large cross-border and domestic M&A deals, as well as real estate portfolio transactions. The team deals primarily with large multinational companies in tax disputes and in an advisory role. Fitan Clancy is now the head of the tax department, with Caroline Devlin acting as a senior partner in the team. David Kilty was appointed partner in January 2019.

The firm has assisted the Eaton Corporation in the spin-off of its lighting company into a new Irish plc. It also advised eir, the Irish telecommunications and broadband business, when NJJ and Iliad agreed to purchase a majority stake in the company.


Deloitte has a significant presence throughout Ireland with five offices, placing it as the third largest tax group in Ireland. The tax department is capable and experienced in advising in all tax matters including corporate tax, transactional tax, dispute advice and transfer pricing. Larraine Griffin, who specialises in transactional and corporate taxation, leads the tax team. In January 2019, Deloitte hired Caroline O'Driscoll, who had previously spent more than 21 years at KPMG, as partner. She focuses on the TMT and life sciences sectors.

The group has recently been involved in a variety of cases, including acting as advisers to Bookfinders during its Court of Appeal proceedings regarding the VAT treatment of heated food and drinks. It also acted as lead adviser to Macquarie Bank in its share acquisition of more than 100 aircraft.

Maples Group

Maples group focuses its taxation practice on advising internationally-focused investment funds and platforms, working closely with its Luxembourg based teams to assist mainland European clients, and working with its offices in Bermuda, the Cayman Islands and the BVI to assist clients on international tax matters. The firm consists of three partners, including head of tax Andrew Quinn.

The firm recently advised Avestus Capital Partners on the creation of its new Irish residential-focused fund, which was structured as an Irish ICAV.

Mason Hayes & Curran

Mason Hayes & Curran has continued its growth in Ireland, focusing its practice on attracting an international client base, focusing on the technology, real estate and financial services sectors. Corporate tax specialist John Gulliver leads the department. He is supported by Niamh Keogh and Maura Dineen.

The firm has recently concluded work for a major US insurance brokerage, advising on the cost-sharing arrangements relating to its Ireland-based IP innovation centre.


Matheson has the largest tax department of any of the law firms in Ireland. It is recognised for primarily providing Irish tax advice to multinationals and financial institutions, particularly of US and EU origin. John Ryan is the current chair of the tax department, with Turlough Galvin moving to become co-chair of the finance and capital markets department. It recently hired Anne Harvey as a tax principle. Harvey has previously spent time at PwC as a director and time as a partner at William Fry.

The firm is increasingly working for large financial institutions on Brexit planning strategies to ensure financial protection if Britain leaves the EU. This includes advice on STERIS's re-domiciliation to Ireland from the UK. Matheson has also been the first Irish firm to advise on the issuing of Sukuk bonds from an Irish issuer on the Irish Stock Exchange. 

Client feedback  

“Their advice is always clear, timely and comprehensive.”


Walkers has a strong focus on the Irish financial sector, assisting its in-house financial teams on all tax matters, including M&A taxation work, as well as advising on the structures for establishing a variety of investment platforms in Ireland. Corporate and transactional tax specialist Jonathan Sheehan is the head of tax at the firm.

The team recently advised BNP Paribas on the establishment and launch of an Irish SME alternative financing platform. It has also acted as the Irish tax and legal counsel to Tramontana Asset Management in relation to its use of the European Union Allowances regime.

Client feedback

“Practical, clear, consistent advice. Communication is good and focused on solutions and then execution and delivery. Always available and responsive. People you want to work with.”

William Fry

William Fry's tax department, a member of the global Taxand partnership, is credited with being involved in some of the leading corporate transactions to take place in Ireland. It also offers tax litigation advice and representation including numerous High Court cases. Martin Phelan, who has spent nearly 20 years at William Fry, is the head of the tax department. Anne Harvey, who joined the firm in August 2017, left to take up a position at Matheson in late 2018.

The firm was the Irish adviser in the $90 Billion merger between industrial gas suppliers Linde and Praxair. It has also assisted Smurtif Kappa on its recent €600 million bond issuance, as well as litigation support for numerous clients.