CBAM Aluminium Scrap Carbon Cost Divide: Primary vs Secondary Guide 2026

The EU's Carbon Border Adjustment Mechanism is reshaping aluminium markets by creating a permanent cost divide between primary and secondary scrap. Primary aluminium production requires about 14,000 kWh per tonne, emitting roughly 1.5 tonnes of CO2, while secondary remelting uses only 500 to 700 kWh per tonne with near-zero direct emissions. Under CBAM's 2026 rules, primary imports face carbon certificate costs of EUR 1.82 to 3.64 per tonne, while secondary scrap carries just EUR 0.09 to 0.19 per tonne. A key regulatory fault line is the treatment of scrap types. Post-consumer scrap is zero-rated under CBAM, but pre-consumer scrap may be reclassified, potentially closing a loophole that currently gives non-EU remelters a competitive edge over EU-based recyclers. Meanwhile, scrap prices have converged with primary ingot, eroding the traditional cost advantage of secondary production. The strategic logic is shifting from energy cost arbitrage to carbon liability arbitrage, with cumulative CBAM savings for secondary aluminium projected to exceed EUR 200 per tonne by 2035. Procurement teams and investors should monitor the European Commission's proposed revisions on pre-consumer scrap classification. The article provides a clear breakdown of emission factors, CBAM certificate costs, and the thermodynamics driving the gap. It is a practical read for anyone navigating aluminium supply chains under carbon regulation.