U.S. Resets South Korean Tariffs to 25% on Key Imports — Trade & Transportation Impacts to Watch

President Trump announced on January 26, 2026, that the United States will reinstate 25% tariffs on select imports from South Korea, reversing the previously reduced 15% rate that had been applied under a provisional trade agreement framework.

The tariff increase will impact several major product categories central to U.S.–Korea trade lanes, including:

  • Automobiles and automotive components

  • Lumber, timber, and wood derivative products

  • Pharmaceuticals and related materials

  • Additional goods subject to reciprocal tariff measures

According to the President, the decision follows South Korea’s legislature not yet formally approving the trade agreement reached with the U.S. in July 2025, despite reaffirmations later in the year between U.S. and South Korean leadership.

Until legislative approval is completed, the U.S. has moved forward with restoring higher tariff levels.

Implications for Importers and Supply Chains

The return to a 25% duty rate may immediately affect:

  • Landed cost calculations and contract pricing

  • Budget forecasting and margin planning

  • Sourcing strategies and supplier negotiations

  • Customs entry compliance and classification reviews

Importers relying on South Korean manufacturing and distribution should begin evaluating upcoming shipments and financial exposure under the revised tariff structure.

U.S. Customs and Border Protection (CBP) is expected to release additional guidance outlining implementation procedures, including any new or revised HTS classifications.

Winter Weather May Contribute to Transportation Disruptions

In addition to regulatory changes, last week’s winter storm across several regions of the U.S. has created ongoing challenges for transportation networks. While operations are stabilizing, some ports, terminals, and inland carriers may continue working through congestion and schedule backlogs.

Potential impacts may include:

  • Slower pickup and delivery timelines

  • Delays in linehaul transit

  • Temporary capacity constraints

  • Extended terminal processing times

Importers should anticipate possible residual delays in the near term, particularly for time-sensitive cargo.

How Radius International Is Supporting Customers

Radius International is actively monitoring tariff developments, CBP implementation guidance, and transportation conditions nationwide. Our teams are assisting customers with:

  • Duty exposure reviews and compliance planning

  • Shipment timing and routing strategies

  • Alternative transportation solutions where needed

  • Proactive communication to minimize disruptions

Staying Ahead of Trade & Logistics Changes

As negotiations evolve and operational updates are released, Radius International will continue providing timely information to help customers remain compliant and protect supply chain performance.

For questions regarding tariff impacts, customs planning, or transportation support, our team is available to assist.