As the international tax landscape has changed over recent years, so has the approach of the island’s Income Tax Authority, with an increased focus on the economic substance of businesses, breakdown of expenses and use of losses.

We assist a wide range of domestic, international, and financial services client groups local and multi-national enterprises to deal with their tax advisory and compliance needs.

Our Services


Why Grant Thornton?

Our tax team is made up of highly experienced professionals who work with our clients to ensure they are compliant with all aspects of their corporation tax obligations by gaining a deep understanding of the businesses.

Office close to you

3rd Floor
Exchange House
54-62 Athol Street
Isle of Man