Welcome to John MacMahon & Co Chartered Accountants

Since 1982 we have been providing cross border expertise, offering a range of accountancy and specialist taxation services. Our 30 qualified staff can service our client needs on an all-Ireland basis.

Our Cross Border Practice deals with Tax and Compliance Regimes in the UK and ROI, dealing with client business of all sizes from local to global with a specialism in Family Business and Start-Ups. We have deep industry expertise across all the main sectors on the Island of Ireland.

With offices in Dundalk, Belfast and Newry, our client nucleus encompasses the Greater Newry and Belfast regions, Counties Down, Armagh, Louth and Monaghan but our experience draws clients from across Ireland and the UK.