Ireland will be asked to explain its tax arrangement with Apple as a new investigation into the deal is launched today.
The European Commission wants details of breaks offered to the technology giant, ahead of the publication of new proposals by the OECD to curb tax avoidance by multi-nationals.
Up to 4,000 people are currently employed at Apple's base in County Cork, but it is officially incorporated in America.
Technology consultant, Damien Mulley, says Apple is depriving the US of revenue by doing business here.
He said: "All worldwide profits go through their facility in Cork and bouncing the profits that they make between a couple of companies, they can end up paying less than the corporate tax in Ireland, which is 12.5%.
"As a result, they are keeping their money out of America and I think the American tax officials and European tax officials want to see more revenue generated from real taxes."