About John MacMahon & Co.

John MacMahon & Co. Chartered Accountants is a cross-border practice which was established in 1982.

Today we have offices in Dundalk, Belfast and Newry and employ over 30 qualified staff to service clients on an all-Ireland basis.  

John MacMahon & Co is a service-orientated firm with a strong client base in South Down, South Armagh, North Louth and Monaghan offering particular expertise in cross-border tax issues. We are committed to providing a service uniquely tailored to your business’ needs – developing and advising on an individual basis.

Our practice provides a range of accountancy services, incorporating specialist taxation services, to a broad client base which includes the construction, transport, agriculture, leisure, retail and food service sectors.

John MacMahon & Co. has extensive experience in nurturing small to medium sized family-owned businesses and is committed to developing and advising on the growth of each business on an individual basis.

John MacMahon & Co.  is registered to carry on work in the UK and Republic of Ireland by the Institute of Chartered Accountants in Ireland. Details about our audit registration can be viewed at www.auditregister.org.uk, under the reference number 222919.