As of 12:01 a.m. ET on June 4, tariffs on most steel and aluminum imports into the United States have officially doubled—from 25% to 50% ad valorem—following a proclamation issued by President Trump.

An exception remains in place for imports from the United Kingdom, which will continue to be subject to the original 25% tariff rate until July 9. After that date, the U.S. Commerce Secretary has the authority to raise the tariffs to 50% if it is determined that the U.K. has not met its commitments under the U.S.-U.K. Economic Prosperity Deal (EPD), signed on May 8, 2025.

Importers and industry stakeholders are advised to closely monitor compliance developments and prepare for potential changes to duty rates in the coming weeks.

CBP Issues Updated Guidance on Steel and Aluminum Tariff Increases – Effective June 4

U.S. Customs and Border Protection (CBP) has released updated guidance in response to the tariff increases on aluminum and steel imports.

The new guidance outlines a revised priority order for processing duties under five key presidential actions, as referenced in Executive Order 14289 (as amended). This priority applies to goods entered for consumption or withdrawn from warehouse for consumption on or after the effective date.

Here is the updated duty priority order:

  1. 232 Auto and Auto Parts – Based on Proclamation 10908 (March 26, 2025), covering adjustments to imports of automobiles and related components.
  2. 232 Aluminum – Under Proclamation 9704 (March 8, 2018), addressing aluminum imports, now amended to reflect the 50% tariff increase.
  3. 232 Steel – Covered by Proclamation 9705 (March 8, 2018), now updated to include the new 50% duty rate.
  4. IEEPA – Canada – From Executive Order 14193 (February 1, 2025), related to duties imposed to combat the trafficking of illicit drugs across the northern border.
  5. IEEPA – Mexico – From Executive Order 14194 (February 1, 2025), focused on duties imposed in response to conditions at the southern border.

Source: NCBFAA