Professional services firm KPMG said revenues rose by nearly 10 per cent to a record level of €414 million during 2018.
KPMG, which operates as a single entity across both the Republic and Northern Ireland, said a "robust economy" increased demand for its services across all sectors.
"Ireland is one of the world's most attractive locations for international investment. This, combined with Irish companies succeeding in international markets, is driving growth," the firm's managing partner, Shaun Murphy, said.
Having opened new offices in Belfast in 2017 and Galway in 2014, KPMG is moving to new premises in Cork this year. The firm also recently signalled plans to move offices in Dublin given its headcount growth.
Dublin office space
KPMG said it is looking for 350,000sq ft of new office space for its almost 2,500 people located in Dublin.
The firm will continue its graduate hiring programme this autumn with plans to take on over 300 new recruits.
“Demand for our services has grown in all parts of the country whilst the issues and opportunities business leaders have to manage is becoming increasingly complex,” Mr Murphy added.