JOHN MACMAHON & CO. LIMITED

John MacMahon & Co. Limited is a chartered accountancy and audit firm that has been delivering cross-border expertise across the island of Ireland since 1982. With a team of thirty qualified professionals, the practice serves businesses of every size-from local family enterprises to multinational operations-through its offices in Belfast, Newry and Dundalk, covering the Greater Newry and Belfast regions as well as Counties Down, Armagh, Louth and Monaghan.

The firm's core services include full-spectrum accounting and audit, helping clients navigate the entire financial reporting cycle and ensuring robust, compliant audit outcomes. Its tax planning and compliance team specialises in cross-border taxation issues, offering consultancy that rivals larger city-centre practices. In addition, John MacMahon & Co. provides bespoke business advisory, tailoring strategic guidance to the unique needs of each client, with a particular focus on family-run businesses and key sectors throughout the island.

By remaining software-agnostic and maintaining chartered status alongside a registered auditor licence, the firm offers flexible, high-quality solutions to clients north and south of the border, helping them grow and thrive in a complex regulatory environment.