[U.S. Trade Representative: U.S. to Announce 15% Tariff in the Coming Days] According to Jin10, U.S. Trade Representative Katherine Tai stated that they are studying how to implement the 15% tariff, and the U.S. will announce the 15% tariff. The announcement regarding the 15% tariff will be released in the coming days. It is expected that the EU and the UK will fulfill their commitments under the agreement; tariffs may be raised to 15% 'as circumstances dictate.'