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.
- The price of certificates will reflect the average weekly cost of EU ETS allowances during the year of import. For example, certificates for 2026 imports will be priced based on 2026 ETS prices, even though they are purchased in 20275.
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
Starting in 2026, when the definitive CBAM regime begins, importers will only need to surrender CBAM certificates for 50% of the embedded emissions in their imported goods. This is part of a gradual ramp-up:
- 2026: 50% of emissions covered by CBAM certificates.
- 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