Good afternoon, and welcome back to South Korea Tariff News and Tracker. I'm your host, and we've got significant developments to cover as the U.S. trade landscape shifts dramatically following a major Supreme Court decision.
Just one week ago, on February 20th, the U.S. Supreme Court struck down the administration's use of the International Emergency Economic Powers Act for imposing tariffs. This ruling invalidated the 15 percent reciprocal tariffs that had been in place, but it didn't end the tariff regime entirely. Instead, the Trump administration pivoted quickly to what trade experts are calling "Plan B."
Effective February 24th, a new 10 percent temporary tariff took effect under Section 122 of the Trade Act of 1974. According to trade policy documents, the president has indicated this will increase to 15 percent, the maximum allowed under this authority. This temporary measure is scheduled to remain in place for 150 days, through July 24th, 2026.
For South Korea specifically, the situation is mixed. The good news is that Seoul negotiated a favorable bilateral trade deal with the Trump administration before the Supreme Court ruling. That agreement reduced auto tariffs from 25 percent down to 15 percent, bringing Korea in line with Japan and the European Union. According to trade analysts, this deal is considered relatively solid and is expected to hold despite the legal upheaval.
However, there's a cautionary note. South Korea was threatened with an additional 10 percentage point tariff increase if the country didn't move fast enough on its trade commitments with Washington. The Trump administration has made clear that tariff instability will remain a defining feature of 2026. They're launching new investigations under Section 301 of the Trade Act, examining unfair trading practices in areas including digital services and trade regulations. South Korea, along with Brazil and the European Union, could face scrutiny over strict digital regulations.
What's notable is that the administration plans to maintain tariff "continuity" through various legal authorities. Section 232 tariffs on steel and aluminum remain unchanged, and the new Section 122 surcharge doesn't stack with those existing duties. Korean exporters should monitor how these different tariff layers interact with their bilateral agreement.
According to officials from the U.S. Trade Representative's office, existing trade deals are expected to hold because countries understand that breaking those agreements could trigger even worse tariffs under alternative legal authorities. For South Korean businesses and listeners tracking these developments, the key message is that while the legal landscape has shifted, the fundamental tariff pressure remains.
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