South Korea Faces Section 301 Investigation as US Tariffs Climb to 10.3 Percent in 2026

The Trump administration's aggressive trade policies continue reshaping the global economic landscape, and South Korea finds itself navigating an increasingly complex tariff environment alongside major trading partners in Asia and beyond. As of March 2026, the United States has maintained elevated tariff pressure following significant legal and policy shifts. The effective US tariff rate has climbed to 10.3 percent through January 2026, according to Penn Wharton estimates, up dramatically from roughly 2.2 percent at the start of 2025. After the Supreme Court struck down tariffs imposed under the International Emergency Economic Powers Act on February 20, the Trump administration swiftly implemented a new 15 percent global baseline tariff under Section 122 of the Trade Act of 1974, ensuring that trade pressure remained elevated. South Korea faces particular attention as one of 16 economies now subject to sweeping Section 301 investigations launched on March 11. These investigations target structural excess manufacturing capacity across sectors ranging from steel and semiconductors to batteries and robotics. The U.S. Trade Representative is examining whether foreign policies, including those in South Korea, have led to overproduction that displaces American domestic production and undermines U.S. competitiveness. Notably, South Korea has indicated willingness to honor announced investments and trade commitments despite the uncertain tariff landscape. This positions the country differently from some other trading partners grappling with potential reciprocal tariff frameworks. The situation contrasts with recent developments involving India, where the United States announced a framework for an interim trade agreement on February 6, reducing reciprocal tariffs from 25 percent to 18 percent and eliminating an additional 25 percent penalty tariff. The broader context reveals significant strain on American consumers and businesses. Penn Wharton estimates suggest the average household tariff cost in 2026 ranges from 570 to 600 dollars, with projections indicating losses between 770 and 940 dollars per household if Section 122 tariffs become permanent. Specific sectors including groceries, consumer durables, pharmaceuticals, and auto parts face particular vulnerability to additional tariff hikes in the second half of 2026. South Korea's manufacturing-intensive economy, particularly its semiconductor and automotive sectors, remains exposed to these evolving policies. The Section 301 investigations represent a critical development that listeners should monitor closely, as outcomes could significantly impact trade flows and pricing for Korean exports to the United States. Thank you for tuning in to South Korea Tariff News and Tracker. Please subscribe to stay updated on how these developments unfold and what they mean for Korean businesses and the broader economy. This has been a Quiet Please production. For more, check out quietplease.ai. For more ch This content was created in partnership and with the help of Artificial Intelligence AI.