BDO Ireland and BDO UK have completed a merger effective 4 July 2026, creating an international professional services business with revenues of nearly €1.26 billion, 8,500 staff, and approximately 500 partners, with plans to double the Irish workforce from its current level to more than 1,100 over the next five years.

The Irish Times reported that the merger brings together BDO Ireland's offices in Dublin and Limerick with BDO UK's existing 17 locations across the UK. Mark Shaw continues as UK managing partner in the enlarged organisation, while Brian McEnery continues as regional managing partner in Ireland.

The combined firm also plans to increase the number of partners in Ireland from 43 to 70 over the same five-year period, representing a significant expansion of senior-level headcount in the Irish practice.

McEnery told The Irish Times that the deal gives the Irish business access to a deeper and broader range of service offerings, and will increase technology investment as both the firm and its clients seek to make greater use of AI.

The merged group identified risk advisory, digital transformation consulting, audit in financial services, and global taxation advice as its primary areas of revenue growth opportunity in Ireland.

Scott Knight, head of growth, strategy and international at BDO UK, said the merged group is open to further consolidation with other parts of the BDO international network, which is encouraging regional clustering, though nothing significant is at an advanced stage at present.

BDO Ireland posted revenues of €75.3 million for its latest financial year to the end of February 2026, a decline from €85.3 million the previous year, driven in part by the sale of a digital consulting business at the start of the financial year.

Despite a broader trend among professional services firms globally toward scaling back graduate and entry-level hiring in response to AI, McEnery said BDO Ireland held its graduate intake steady and slightly increased it last year to between 65 and 70.

For HR practitioners, the BDO merger presents a concentrated workforce integration challenge: combining two separately structured organisations with distinct cultures, compensation frameworks, and talent pipelines under a unified operating model, while simultaneously planning to double headcount over five years across a highly competitive Irish professional services talent market.