$5 trillion in assets worldwide is held "offshore" in tax havens the IRS writes on their website: “It is difficult to quantify the amount of assets being held offshore or the rate at which the industry is growing. But it has been estimated that some $5 trillion in assets worldwide is held "offshore" in tax havens. Presumably transfers from the U.S. Represent a large share of this wealth. One authority has estimated the annual revenue loss to the U.S. At a minimum of $70 billion.”