A Foreign Branch is an extension of a U.S. business that operates in a foreign country and is not a separate legal entity.
According to Section 1.367(a)-6T(g)(1), it is a business operation managed by a U.S. entity outside the U.S., functioning as a key part of its overall operations. To qualify, the foreign branch typically needs to maintain separate books, have a fixed office or employees, or meet the criteria for a “permanent establishment” under a U.S. tax treaty. Qualification depends on the specific circumstances of each case.