How Is CBAM Calculated?
Formula, Examples and Compliance Steps
Learn exactly how CBAM is calculated for EU importers in 2026. This covers the core calculation method importers need to understand for compliance.
CBAM targets embedded emissions in imports of cement, iron & steel, aluminium, fertilisers, electricity, and hydrogen. The definitive regime started 1 January 2026, with first declarations due 2027.
How Is CBAM Calculated?
Official formula from Article 7 of Regulation (EU) 2023/956:
CBAM certificates formula: (Embedded Emissions − Benchmark × CBAM Factor) × (EU Carbon Price − Foreign Carbon Price Paid)
Key components:
- Embedded Emissions: Supplier-provided data (tCO₂e)
- Benchmark × CBAM Factor: Declining EU free allowance adjustment (2.5% in 2026)
- EU Carbon Price: Weekly ETS auction average
- Foreign Carbon Price: Deduction if paid in EU-recognised scheme
What Steps Must Importers Follow?
Follow these steps if you are an importer liable to CBAM (importing above 50 tonnes of CBAM goods per year)
- Confirm Authorised CBAM Declarant statusin CBAM Registry
- Obtain emissions datafrom non-EU operators (per CN code)
- Calculate total embedded emissionsfor all 2026 imports
- Purchase certificates and submit annual declaration
Operators report production emissions per tonne. Importers multiply by import quantities.
How is CBAM Calculated? Steel Import Example
Complete steel import example (1,000 tonnes, 2026):
This shows how the official formula works in practice. The supplier reports embedded emissions. EU benchmarks adjust for domestic production efficiency. The 2.5% CBAM factor reflects remaining free allowances in 2026.
Component | Value | Calculation |
Embedded Emissions | 2.0 tCO₂e/tonne | Supplier data |
Benchmark | 1.8 tCO₂e/tonne, | EU reference |
CBAM Factor | 2.5% | 2026 rate |
ETS Price | €75/tCO₂e | Weekly average |
Certificate Obligation | €3,750 | (2.0 – 1.8 × 0.025) × 1,000 × 75 |
What Are the 2026 CBAM Compliance Requirements?
- Confirm Authorised Declarante CBAM status via CBAM Registry
- Collect verified emissions data from suppliers
- Calculate emissions based on import quantities
- Purchase and surrender CBAM certificates annually
Who is exempt? Importers under 50 tonnes/year across all CBAM goods.
How is CBAM Calculated? Common Mistakes to Avoid
- Using transitional-phase rules (ended 31 Dec 2025)
- Not requesting supplier emissions data early
- Relying on defaults
Key Takeaways
CBAM puts a carbon price on the embedded emissions in your imports.
Importers must:
- Report data collected from suppliers
- Calculate total obligation using the official formula
- Surrender CBAM certificates by annual deadlines
En definitive regime is now live. Ensure compliance before 2027 declaration deadline.
How Can Carbon Complete Help with CBAM?
At Carbon Complete, we handle CBAM calculations, data verification, registry setup, and forecasting for EU importers. Contact us for compliant 2026 declarations and cost optimisation.
