A U.S. law aimed at curbing tax evasion by citizens using foreign accounts could cost large multinational banks as much as $100 million apiece to implement in one-off systems costs, a top asset manager and a tax lawyer told a conference on Friday. The overall costs of implementing the Foreign Account Tax Compliance Act (FATCA), could approach the more than $8 billion FATCA is due to raise over 10 years, he said. FATCA was introduced after high profile tax evasion cases. “With FATCA there is a cost on us in Europe but benefits in the U.S.. The benefit is $8.5 bln over 10 years … for multinational banks I have seen estimates of $100 million (each, in one-off costs),” said James Broderick, head of Europe, Middle East and Africa for JP Morgan Asset Management.