Under standard provisions in US income tax treaties, a foreign company that is conducting business in the US through a branch is subject to regular US income tax on its US income attributable to a permanent establishment (PE) maintained in the US. Under Treasury Regulation section 1.882-5, in determining the branch's taxable income, interest expense for the US branch is determined by apportioning the taxpayer's worldwide interest expense under a three-step apportionment formula.
March 01 2004