Overview

The United States is one of the UK’s most important export markets, but recent tariff, customs and enforcement changes continue to create uncertainty for manufacturers.

This page should focus on practical implications for exporters: tariff exposure, customs compliance, supply chain due diligence and opportunities under the UK-US Economic Prosperity Deal.

Latest developments

  • Section 232 tariffs: changes continue across steel, aluminium, copper and derivative products.
  • Forced labour tariffs: proposed Section 301 measures could increase scrutiny of supply chains and sourcing.
  • Customs enforcement: US Customs and Border Protection is increasing checks on declarations, origin and importer compliance.
  • Low-value shipments: the suspension of duty-free treatment for many shipments below $800 could increase costs for smaller consignments.
  • Section 122 tariffs: current arrangements include a 10% tariff plus applicable MFN duties, scheduled to run until 24 July 2026.

UK-US Economic Prosperity Deal

The UK-US Economic Prosperity Deal provides a framework for tariff relief and cooperation in strategic sectors, including aerospace, automotive, pharmaceuticals, life sciences, steel and aluminium.

  • Aerospace: covered products benefit from a 0% tariff rate.
  • Automotive: up to 100,000 UK vehicles can enter the US annually at a preferential 10% tariff rate.
  • Pharmaceuticals and life sciences: the deal includes tariff arrangements, supply chain cooperation and protection for some medical technology exports.
  • Steel and aluminium: discussions continue on future arrangements for core steel products.

What businesses should do

  • Review exposure to US tariffs, including Section 232 and Section 122 measures.
  • Check product classifications, origin calculations and supporting documentation.
  • Assess supply chain due diligence processes, particularly where forced labour measures may be relevant.
  • Review contracts to understand who bears tariff and customs costs.
  • Monitor USMCA developments if your supply chain involves Canada or Mexico.

Useful links

•    UK-US Economic Prosperity Deal
•    Exporting to the United States market guide
•    UK-US tariff update
•    Low-value shipment rules