Chartered Accountants & Tax Advisors

For 80 years, Merry Mullen has guided Irish businesses, family enterprises and international investors through every stage of their journey — from start through growth, succession and exit.

We are an independent, partner-led firm of chartered accountants and tax advisors based in Dublin 2. Our partners and senior team come from Top 10 accountancy firms.

We offer deep technical expertise and the responsiveness and personal attention that only an independent practice can provide.

That approach has kept clients with us for decades and across generations.

TALK TO US

Our Services

Merry Mullen provides comprehensive accountancy, audit, tax and business advisory services tailored to your business and personal circumstances.

For international businesses, we provide global knowledge from a local perspective through our membership of GMNI, an association of independent accountancy firms operating in 49 countries.

WHAT WE DO

“Merry Mullen provide exceptional accounting and advisory support. Their clear guidance, responsiveness and practical insight have been especially valuable during our M&A activities, where their expertise helped us navigate complex decisions with confidence.”
Colm Kelleher, Managing Director, LHK Group
“Declan Merry’s thoughtful, high-level advice has always helped us make good business decisions. Aisling Yates gives us real peace of mind on our day-to-day accounting and compliance. We really value how well they understand the real estate sector. Their advice is always practical, relevant, and easy to put into action.”
Andrew Power, Director, Indigo Real Estate Management
“Merry Mullen have supported us through multiple stages of international expansion, advising on structure, and compliance as we entered new markets.

What really sets them apart is the consistency of their support.”
Johnny Howard, Legs Eleven
“Pat & Merry Mullen have assisted us transition through different family generations and grow from a small regional coffee company into one of the largest coffee roasters on the island of Ireland. Pat has always provided sound, rational and sensible advice that has facilitated our growth.”
Graham Mongey, Managing Director, JJ Darboven
“Since I took over our company 26 years ago, I have always found Merry Mullen to be a very professional company and all the team are a pleasure to deal with. Their knowledge in the accounting and taxation field has been invaluable to me and they always explain it in very clear and concise language.”
Paul Flanagan, CEO, Flanagan Fittings
“Their team is responsive, reliable, and a pleasure to work with. We are very happy with the support they provide and value them as a trusted business partner.”
Juliana Middleton, Director of Corporate Accounting, Interop Technologies
“Switching to Merry Mullen has fundamentally changed our perception of what a professional accounting and audit engagement should be. Their team is exceptionally responsive and clear in all communication. Beyond simply fulfilling the compliance requirements, they provide proactive advice that has genuinely added value to our financial strategy.”
Carl Tano, Head of Operations, MinFarm Tech
“We have employed Merry Mullen as our financial advisors since the time of our start up and the support and service offered has been super – as a young company this support and peace of mind has been very welcome.”
Julian Beatty, Owner/Director, Nova Q Ltd
“As our company grew we needed a more solid accountancy firm.
Declan and his team stood head and shoulders above his competitors.
We’ve been doing business together for many years since.”
Noel Storey, Beacon Studios Ltd

Independent since 1945

Medium Practice of the Year, Irish Accountancy Awards 2025

Chartered Accountants & Tax Advisors

Our Services