If the USA adopted Ireland&#x27;s tax code then companies would have to pay 12.5% on trading income. The reason Ireland is a good place for American companies is because of a loophole called the Double Irish. Basically Irish based companies pay tax where they are originally registered and in Delaware the code stipulates that taxes get paid where the revenue was generated. That means the US expects the companies to pay the tax in Ireland and the Irish expect the companies to pay the tax in the US. Therefore the potential tax payment ends up in no-mans land and never gets paid whilst remaining all perfectly legal.