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 three other partners. 

The firm recently advised Investec on the sale of its Irish wealth and investment business to Brewin Dolphin. In addition, they advised Ethoca, an Irish incorporated company, on its acquisition by Mastercard, one of the most significant technology deals in the Irish market.

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 heads the tax department. 

Recently, the firm have been heavily involved in some of the largest corporate transactions. Examples include, the firm acting as legal and tax adviser to Praxair, Inc. on its $73bn merger of equals with Linde; advising Allergan on the $63m proposed scheme of arrangement with Abbvie and advising Reverse Morris Trust transaction with Gardner Denver. 

Notable changes to the team include the arrival of associate Dearbhla Ni Fhloinn, who joined in April 2019 from William Fry. Also in January 2020, Nicola Cavey became an associate after finishing her training. In June 2019 associate Clodagh Power departed to OECD, Paris and in November 2019, associate Edel Mullins left to take a career break. 

Client feedback 

Extremely good in all aspects.


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. Lorraine Griffin, who specialises in transactional and corporate taxation, leads the tax team. 

Recently Deloitte have provided advice for several transactional cases which required interaction with foreign advisers and tax authorities. 

There have been a several new arrivals to the firm’s tax department. Notable partner hires include Shane Wallace, Kevin Norton, Vincent McCullagh, Matthew Dolan and Ronan Ferry.

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.


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. 

The firm are providing ongoing Irish corporate and tax counsel to Willis Towers Watson in its all-stock combination with Aon. The pending transaction combines the world’s second and third biggest insurance brokerages in the largest ever deal for the industry. In addition, the firm provided advice to AbbVie in its acquisition of Allergan. The M&A transaction, in terms of size, was extremely significant. 

Changes to the team include the arrival of senior associate Peirce O’Driscoll and associate Aisling Egan who both joined in January 2020 from Mason Hayes Curran further strengthening the indirect tax and finance tax team. Tax principal Anne Harvey departed to Accenture in May 2020 and tax principal John Kelly retired in June 2019. 

Client feedback 

They are a superb team with great technical expertise. They are very adept at coordinating multinational teams on cross-border deals and are responsive when dealing with ad hoc queries. The size of their team means they have a great breadth of expertise.” 

Best-in-class service.


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 heads the tax team. 

The firm were the Irish tax and legal counsel and listing agent for Avia Solutions Group. This was a debut high yield bond issuance for the company. It has also provided legal and tax counsel to a Seoul-based asset management company in the acquisition of another company holding Ireland’s largest building by way of share price. 

Client feedback 

Work was timely, thorough and met the requirements.