CBAM and South Korea: What POSCO and Korean Steel, Aluminium, and Hydrogen Exporters Must Do
South Korea hosts some of the world's largest single-site CBAM exposures. POSCO's Pohang and Gwangyang integrated steel mills together produce around 40 million tonnes per year, with significant EU export volumes. The Korean Emissions Trading Scheme (K-ETS) has operated since 2015 but has not yet been recognised by the European Commission as equivalent for CBAM Article 9 deduction purposes — meaning Korean exporters face the full EU CBAM rate on top of their domestic K-ETS obligations until equivalence is granted.
South Korea CBAM Exposure by Sector
| Sector | Key companies / installations | EU export volume | Estimated annual CBAM liability |
|---|---|---|---|
| Steel (BF-BOF integrated) | POSCO (Pohang, Gwangyang), Hyundai Steel (Dangjin), Dongkuk Steel | 4,000,000–6,000,000 t/year | EUR 569–855M |
| Steel (downstream rolling, EAF) | POSCO downstream, Sea Hawk Steel, KISCO Holdings | 500,000–1,200,000 t/year | EUR 23–55M |
| Aluminium (downstream + secondary) | Novelis Korea, Daewon Aluminium, Sam-A Aluminium | 100,000–250,000 t/year | EUR 80–203M |
| Hydrogen (planned green exports) | Hyundai/SK Hydrogen JV, POSCO H2 Biz, KOGAS pilots | 0–50,000 t/year (rising 2027+) | EUR 0–17M |
POSCO — the World's Largest Single CBAM Exposure
POSCO's Gwangyang Works alone produces around 21 million tonnes of crude steel per year, making it one of the largest single steel installations on the planet. Its EU export volume isn't a complete commercial secret but reasonable estimates put combined POSCO EU exports (Pohang + Gwangyang + downstream) at 2–4 million tonnes annually. At the 2.18 default value and current EU ETS prices, POSCO's EU CBAM exposure runs into hundreds of millions of euros per year. POSCO has been investing in low-carbon steelmaking — HyREX hydrogen-DRI pilot, increased scrap utilisation, finex process — and documenting actual values is essential to capture the value of those investments. Without verified actuals, POSCO pays default rates on emissions that are demonstrably lower than the default.
K-ETS and the CBAM Article 9 Equivalence Question
The Korean Emissions Trading Scheme has been operational since 2015 and covers approximately 70% of national emissions — including all major CBAM-relevant installations. Korean ETS allowance prices in 2025 averaged around KRW 8,000–12,000 per tonne (approximately EUR 5–8/tCO2), well below current EU ETS prices of around EUR 65/tCO2. Even if K-ETS were granted CBAM Article 9 equivalence today, Korean exporters would only get partial credit reflecting the price differential. The substantive policy debate in 2026–2028 is whether K-ETS prices will rise enough to make full equivalence economically meaningful for Korean exporters. Until then, the rational play for Korean producers is to document actual values and minimise their CBAM certificate purchase obligation regardless of K-ETS status.
Korea's Grid Emission Factor and the Aluminium / Hydrogen Story
Korea's national grid emission factor is approximately 0.46 tCO2/MWh — moderate by global standards, with a high coal share but significant nuclear (about 30%) keeping it below the Asian average. For Korean primary aluminium (small volumes — Korea is mostly a downstream aluminium economy) and for Korean grey hydrogen (currently dominant), this grid factor sets the baseline. Korean green hydrogen production at scale will require dedicated renewable PPAs with hourly matching — a complex but achievable structure given Korea's growing offshore wind pipeline. By 2027–2028, Korean green hydrogen exports to EU buyers (under the EU's 10 Mt/year hydrogen import target) become a real CBAM-advantaged proposition. See the hydrogen calculation guide.
Sector-specific deep dives for South Korea
Frequently Asked Questions
Does South Korea have a carbon price eligible for CBAM deduction?
Not yet. K-ETS has been operational since 2015 but is not currently recognised by the European Commission as eligible for CBAM Article 9 deduction. The equivalence decision depends on alignment of allowance prices, sector coverage, and free allocation rules between K-ETS and EU ETS — none of which are currently aligned tightly enough.
Which Korean companies face the highest CBAM exposure?
POSCO is by far the largest single exposure — its Pohang and Gwangyang integrated steel mills together produce around 40 million tonnes per year. Hyundai Steel (Dangjin) is second. Among aluminium fabricators, Novelis Korea and Sam-A Aluminium have meaningful EU-bound volumes.
What is South Korea's total annual CBAM exposure?
Estimated at EUR 700M–1.1B annually across steel, aluminium, and emerging hydrogen — dominated by steel exports from POSCO and Hyundai Steel.
Does Korean K-ETS reduce my actual CBAM cost?
Not under current rules. The CBAM Article 9 deduction requires the European Commission to formally recognise the third-country carbon price as equivalent. K-ETS does not currently have that recognition. Korean exporters effectively pay both K-ETS domestically and full CBAM rates at EU import.
Where can Korean manufacturers find ISO 14065 accredited CBAM verifiers?
Korean producers typically work with KEITI-accredited verifiers operating to ISO 14065 (KEITI is the Korean accreditation body). For CBAM specifically, many Korean producers also engage international ISO 14065 firms (DAkkS-accredited German verifiers, UKAS-accredited UK firms) given EU buyer preference. See the verifier directory.
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