How CBAM certificates work
At the heart of CBAM is a certificate-based system that mirrors the EU Emissions Trading System (ETS). These certificates ensure that imported goods face a carbon cost equivalent to that of EU-produced goods.
3.1. What are CBAM certificates?
CBAM certificates represent the carbon emissions embedded in imported goods. Importers of certain carbon-intensive products (like cement, iron and steel, aluminum, fertilizers, electricity, and hydrogen) must purchase these certificates to offset the carbon emissions associated with the production of those goods outside the EU. Each certificate corresponds to 1 ton of CO₂ equivalent.
3.2. How are certificates purchased?
- Importers must be authorized CBAM declarants and registered in the CBAM Registry.
- Certificates will be sold via a central EU platform, with sales starting in February 20274.
- For 2026 imports, the price will likely be calculated as the average quarterly EU ETS price for that year, even though the certificates will only become available for purchase starting 1 February 2027. From 2027 onwards, the price will shift to reflect the average weekly EU ETS price, starting from 1 January of the corresponding year.5
3.3. Why the delay to 2027?
Although the definitive CBAM regime begins in 2026, the sale of certificates is delayed until February 2027. This delay was introduced to:
- Address uncertainties in the first year of full implementation.
- Allow time to finalize the CBAM Registry and central platform.
- Ensure smoother coordination between national authorities and the EU system6.
3.4. The 50% allocation rule
Although the definitive CBAM regime begins in 2026, that year remains a reporting-only period, importers will not yet surrender any CBAM certificates:
- For 2026 imports, certificates will be purchased starting in early 2027, with prices reflecting the average quarterly EU ETS allowance prices corresponding to the relevant quarter of import.
- 2027–2034: The percentage increases annually, in line with the phase-out of free ETS allowances for EU producers.
- By 2034: Importers will need to surrender CBAM certificates for 100% of embedded emissions.
This phased approach ensures a level playing field between EU and non-EU producers during the transition, avoiding sudden cost shocks for importers while supporting EU industry’s decarbonization.
4 Proposal for a regulation of the european parliament and of the council amending regulation (EU) 2023/956 as regards simplifying and strengthening the Carbon Border Adjustment Mechanism page 7, Articles 1(15) and 1(18), Article 1(16)
5,6 Proposal for a regulation of the european parliament and of the councilamending Regulation (EU) 2023/956 as regards simplifying and strengthening the Carbon Border Adjustment Mechanis