 Double Irish arrangement

The Double Irish is a base erosion and profit shifting (BEPS) corporate tax tool used mostly by US multinationals since the late 1980s to avoid corporate taxation on non-U.S. profits.It is the largest tax avoidance tool in history and by 2010 was shielding US$100 billion annually in US multinational foreign profits from taxation, and was the main tool by which US multinationals built up untaxed offshore reserves of US$1 trillion from 2004 to 2018.