CBAM and POSCO: Why South Korea's Largest Steel Producer Faces Massive CBAM Exposure
POSCO is the world's sixth-largest steel producer and operates among the largest integrated steel complexes on the planet — Pohang Works and Gwangyang Works in South Korea. Combined capacity is approximately 40 million tonnes per year of crude steel. EU export volumes are substantial — estimates put combined POSCO EU-bound shipments (Pohang + Gwangyang + downstream) at 2–4 million tonnes annually. At the 2.18 EU default value, this 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.
POSCO's CBAM Exposure Profile
POSCO's actual embedded emissions on its integrated BF-BOF lines are approximately 1.95–2.10 tCO2/t — slightly below the 2.18 EU default. The per-tonne CBAM saving from documenting actuals is small (EUR 5–15 at current ETS prices) but at POSCO's scale this accumulates to meaningful annual numbers. More important is the audit trail for ongoing modernisation investments and the long-term competitive positioning as POSCO's HyREX hydrogen-DRI pilot scales toward commercial production.
HyREX and the Long-Term CBAM Trajectory
POSCO's HyREX (Hydrogen Reduction) project is the company's flagship low-carbon steelmaking initiative. The technology uses hydrogen-based fluidised reduction to replace BF-BOF for primary steel production, with theoretical actual embedded emissions of 0.4–0.8 tCO2/t — well below current default. Commercial HyREX production is targeted for 2030+, with pilot operations earlier. As HyREX-route steel comes online, POSCO's CBAM economics shift dramatically — from "small documentation saving on integrated steel" to "substantial saving on hydrogen-DRI steel". The CBAM verification trail being established now is the audit infrastructure for that transition. See the steel calculation guide.
Why K-ETS Doesn't Help Today
K-ETS has been operational since 2015 and covers POSCO's major facilities. K-ETS allowance prices in 2025 averaged KRW 8,000–12,000 per tonne (approximately EUR 5–8/tCO2) — far below current EU ETS prices 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. POSCO pays K-ETS allowance costs domestically AND full CBAM rates at EU import. See the CBAM South Korea overview.
Compare with other steel producers facing CBAM
Frequently Asked Questions
What is POSCO's CBAM exposure on EU steel exports?
Estimated EU-bound exports of 2–4 million tonnes annually × approximately EUR 130–142/tonne CBAM cost at default = EUR 260–570M annual exposure. Actuals are slightly below default, so documented exposure is lower — approximately EUR 235–540M.
Should POSCO document actuals?
Yes. POSCO Pohang and Gwangyang actuals are 1.95–2.10 tCO2/t versus 2.18 default — small per-tonne saving but meaningful at POSCO's scale. More importantly, the documentation infrastructure positions POSCO for the HyREX-route transition where actuals fall dramatically.
Does K-ETS reduce POSCO's CBAM cost?
Not currently. K-ETS is not yet recognised by the EU Commission as eligible for CBAM Article 9 deduction. POSCO pays both K-ETS domestically and full CBAM at EU import.
What is HyREX and how does it affect CBAM?
POSCO's hydrogen-based fluidised reduction process replacing BF-BOF for primary steel. Targets commercial production from 2030+. HyREX-route steel has theoretical actuals of 0.4–0.8 tCO2/t versus 2.18 default — saving of EUR 90–115 per tonne. Pilot facility operating now.
How does POSCO compare to Chinese steel for CBAM?
POSCO's integrated mills are more modern and more efficient than most Chinese integrated mills. POSCO actuals at 1.95–2.10 tCO2/t are below the Chinese coal-grid average of 2.10–2.40 tCO2/t. POSCO also benefits from Korea's lower-carbon grid (~0.46 tCO2/MWh vs Chinese ~0.85 tCO2/MWh) for electricity-intensive downstream operations.
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