BDO UK and BDO Ireland finalise merger to form $1.4bn business

Ellichipuram Umesh

Mon, July 6, 2026 at 2:50 AM PDT 2 min read

BDO's practices in the UK and Ireland have combined to form a single business, BDO LLP, creating one of Europe's largest accountancy and advisory organisations.

The merger took effect on 4 July 2026, aligned with the start of the companies' new financial year. It adds BDO Ireland's bases in Dublin and Limerick to BDO UK's 17 existing offices across its network.

The unified company will have an annual revenue of close to £1.1bn ($1.4bn), with a headcount of approximately 8,500 and around 500 partners.

BDO LLP brings together two practices that have worked together extensively on cross-border mandates, shared talent programmes and joint sector projects over many years.

Mark Shaw will continue as managing partner of the merged entity and Brian McEnery remains regional managing partner for Ireland.

Shaw said: "The accountancy profession is transforming to reflect changing client needs and the desire for closer international working. At the same time, advances in technology and AI are changing the way businesses operate and the expectations they place on their advisers.

"Bringing BDO UK and BDO Ireland together is our response to that shift, creating greater scale, capability and investment capacity for the future. Today marks an important milestone in that journey and the beginning of the next chapter of our growth story."

The company said it will maintain investment in areas including client service, quality, digital tools and people development.

BDO LLP continues as part of BDO International, the global network with revenues of around $11bn. The network covers 169 countries and territories and employs more than 95,000 people in 870 offices.

McEnery said: "This is a merger built on a foundation of shared culture and mutual respect.

"Clients will gain access to a wider network of specialists across the UK and Ireland, while our people will benefit from greater opportunities for collaboration, development and long-term growth.

"Together, we are building a stronger platform for our clients, our colleagues and our future."

"BDO UK and BDO Ireland finalise merger to form $1.4bn business" was originally created and published by International Accounting Bulletin, a GlobalData owned brand.