The US has imposed Section 301 forced-labor tariffs on 60 countries, including Korea at 12.5%. Here's the background and what it means for Korean exporters.
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The Section 301 tariff previewed in our earlier posts is now official. On July 23 (local time), the Trump administration announced it is imposing forced-labor tariffs under Section 301 of the Trade Act on 60 countries and territories, including South Korea.
What just took effect
According to Bloomberg, the measure is based on Section 301 of the Trade Act, with tariff rates varying by country between 10% and 12.5%. The tariff took effect at 12:01 a.m. Eastern time on July 24.
The headline number for Korea: the country will be subject to a 12.5% tariff, the same rate applied to Japan — on the higher end of the country-by-country spectrum.
Why this tariff exists
This Section 301 measure is the result of an investigation the US Trade Representative (USTR) has been running since March. USTR's justification centers on the argument that goods produced using forced labor create unfair competition, and it has applied tariffs to countries it judges to have inadequately enforced restrictions on forced-labor imports. A separate Section 301 investigation into industrial overcapacity is also reportedly underway, meaning further tariff adjustments could still be on the table.
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The line Korea has to hold: the 15% cap
South Korea's top priority now is ensuring that this 12.5% tariff — combined with any future Section 301 tariffs — doesn't push its total rate past the 15% cap secured in last year's US-Korea trade negotiations. That cap was won in exchange for a $350 billion commitment to US-bound investment. How close this new 12.5% tariff pushes Korea to that ceiling, and how much room remains for additional tariffs, will be a key story to watch going forward.
Korean markets shrugged it off — for now
Interestingly, this tariff news didn't trigger an immediate shock in Korean markets. As covered in earlier posts, markets had already largely priced in a Section 301 tariff, and other same-day catalysts — Alphabet's expanded AI capex and Intel's earnings surprise — helped offset the impact. Korean markets were expected to open lower on July 24, weighed down by the Alphabet/Tesla selloff, escalating Middle East risk, and rising oil prices and rates — but analysts expect semiconductor stocks in particular to show relative resilience thanks to Intel's strong results.
What exporters should watch
- Real-world cost impact: how much a 12.5% tariff actually eats into margins will vary widely by sector and company
- Whether the 15% cap holds: continued US-Korea negotiations to keep total tariffs within the agreed ceiling
- Relative position versus competitors: since Japan faces the same 12.5% rate, Korea's relative price competitiveness may not shift much
- The pending overcapacity investigation: its conclusion could determine whether additional tariffs are layered on top
Bottom line
With this Section 301 tariff now in effect, one of the trade uncertainties flagged in our earlier coverage has become reality. Markets, having largely priced this in already, took the news in stride — but whether the 15% cap actually holds remains the most important thing to watch from here. In our next post, we'll cover Nestle's sharp selloff in European trading and how Korean markets reacted to today's full slate of news.
This post is based on reporting from Etoday, Bloomberg, and Daum News as of July 24, 2026. This content is for informational purposes only and does not constitute investment advice.
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Nestle Plunges 7%: Europe's Selloff and Korea's Market Reaction (next post)
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