Mason Hayes & Curran LLP is a business law firm with over 90 partners.

We are at the forefront of fintech advisory and transactional work, providing cutting-edge advice on the challenges and opportunities in this evolving area. Our highly skilled team brings together financial regulation, data privacy and IT legal experts, offering global expertise coupled with detailed industry insight.

We are regularly called upon to assist fintech clients navigate the interplay between technology, data and financial services regulation. Our clients trust us to solve their complex fintech problems, including in relation to new technologies like blockchain, distributed ledgers, big data analytics, insurtech, smart contracts, and artificial intelligence (AI).

Our diverse roster of clients ranges from some of the world’s best-known financial institutions and data-driven organisations to fast-scaling disruptive fintech businesses and investors.


Barrow Street, Dublin, Ireland

Other Locations

London, New York, San Francisco


Chambers & Partners, 2020

"They take a very multidisciplinary approach to Fintech." and "The standard of work was top quality."

Recent Work

  • Acting for an online payment processing business on all aspects of the roll-out and implementation of its disruptive payment transaction authentication technology.
  • Advising new entrants to the Irish market on PSD2 and e-money licencing and advising industries in other areas of Central Bank of Ireland licencing, such as MiFID II, Solvency II, insurance distribution, banking and investment funds and how new technology can be used to service clients.
  • Advising an Ireland-based financial technology company focusing on payment card services on its EU corporate payment and agency arrangements.
  • Advising a major financial institution on the data protection/GDPR aspects of a €2.1bn non-performing loan portfolio sale.
  • Representing a vendor on the supply of managed international data and communications services to a global credit card company.
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