EU CBAM Compliance Services: Emissions Calculation & Declaration Support

The EU Carbon Border Adjustment Mechanism (CBAM) entered its definitive regime on 1 January 2026, shifting from a transitional reporting exercise to a cost-bearing compliance requirement for covered imports. For cement, electricity, fertilisers, iron and steel, aluminium, and hydrogen products within the CBAM scope, EU importers or indirect customs representatives must manage annual CBAM declarations, CBAM certificate purchase, and surrender obligations. Meanwhile, non-EU manufacturers and exporters are expected to provide accurate, traceable, and verifiable embedded emissions data.

REACH24H delivers end-to-end EU CBAM compliance services — from product scope assessment and CN Code / HS Code review, to embedded emissions calculation, default value versus actual data comparison, CBAM cost estimation, tailor-made monitoring plan preparation, verification document preparation, authorised CBAM declarant support, and EU customer communication assistance. Our CBAM services integrate seamlessly with our broader Sustainability Solutions, including Corporate Carbon Accounting and Product Carbon Footprint & Carbon Labeling.

Why CBAM 2026 Compliance Matters

CBAM is no longer only about data reporting. From 2026, it directly affects import cost management, EU customer access, supplier qualification, and long-term competitiveness in carbon-intensive sectors. For manufacturers and exporters supplying CBAM-covered goods to the EU, the practical impact of carbon leakage prevention measures is clear:

• Stricter Data Requests from EU Customers: EU importers need product-level embedded emissions data, production route information, energy consumption records, raw material inputs, and precursor data to meet CBAM obligations.

• Higher Cost Exposure When Using Default Values: Where reliable actual emissions data is unavailable, importers must rely on default values — which are set conservatively and may significantly overstate a supplier's real carbon footprint, leading to higher CBAM certificate costs.

• Potential Cost Pass-Through: Although direct CBAM declaration and certificate surrender obligations rest with EU importers or indirect customs representatives, CBAM-related costs may be reflected in purchasing prices, supplier selection, contractual clauses, and audit requirements.

• Growing Importance of Carbon Data Management: Companies with robust, verifiable, facility-level emissions data will be better positioned to support EU customers and protect their competitiveness in the EU market. This data infrastructure also supports broader sustainability reporting obligations under frameworks such as the EU ESG framework and the Science Based Targets initiative (SBTi).

What Is the EU Carbon Border Adjustment Mechanism?

CBAM is not a conventional customs duty. It operates through a system of annual CBAM declarations, embedded emissions calculation, and CBAM certificate purchase and surrender. Regulation (EU) 2023/956 established the mechanism, and Regulation (EU) 2025/2083 introduced simplification and strengthening measures, including changes to declaration timing, certificate rules, and the single mass-based threshold ^{[1] [2]}.

Which Products Are Covered by EU CBAM?

CBAM currently applies to specific goods in the following six sectors, identified by CN codes: Cement, Electricity, Fertilisers, Iron and Steel, Aluminium, and Hydrogen. The relevant greenhouse gases vary by product category — cement, electricity, iron and steel, and hydrogen are generally associated with carbon dioxide, fertilisers may involve carbon dioxide and nitrous oxide, and aluminium may involve carbon dioxide and perfluorocarbons.

A product should not be assessed solely by its commercial name or general industry category. Companies should confirm CBAM applicability based on the product's CN Code, material composition, production process, customs classification, and EU import documentation. If you are unsure whether your product falls within scope, REACH24H's CBAM Product Scope Assessment service provides a definitive written opinion for internal use and EU customer communication.

Key CBAM Timeline and Compliance Obligations

CBAM implementation is divided into two main phases:

Transitional Period: 1 October 2023 – 31 December 2025

During the transitional period, EU importers or indirect customs representatives were required to submit quarterly CBAM reports for covered goods. No CBAM certificate purchase or surrender was required during this period.

Definitive Regime: From 1 January 2026

From 2026 onwards, CBAM moves into the definitive regime. Authorised CBAM declarants must submit an annual CBAM declaration and surrender the corresponding number of CBAM certificates.

Key Compliance Dates:

Embedded Emissions Calculation: Default Values vs. Actual Data

The core of CBAM compliance is the calculation of embedded emissions in imported goods. This requires companies to collect and evaluate product-level and facility-level data, including production routes, energy consumption, raw materials, direct and indirect emissions, and carbon prices already paid in the country of origin. Companies must strategically choose between relying on EU default values or investing in verified actual emissions data — a decision with significant cost and commercial implications.

To understand the specific default values applicable to your products, read our guide on What Are the Default Values Under the EU CBAM? and utilise our free CBAM Calculator to estimate your potential cost exposure. 

Impact & Actionable Advice for Global Manufacturers and Exporters

For non-EU manufacturers, exporters, and traders, CBAM compliance should be treated as a supply chain data and market access issue — not only as an EU importer obligation. The following seven steps provide a practical compliance roadmap:

1. Confirm product scope early: Review CN Codes, product composition, and EU customs documentation to determine whether the product falls within the CBAM scope.

2. Identify the responsible party in the EU supply chain: Clarify whether the EU importer or an indirect customs representative will act as the authorised CBAM declarant.

3. Build a product-level emissions data system: Collect facility-level production, energy, raw material, and precursor data in a structured and traceable format. 

4. Compare default values with actual emissions data: Evaluate whether actual emissions data can reduce potential CBAM cost exposure and support commercial negotiations with EU customers.

5. Prepare verification-ready documentation: Maintain monitoring plans, calculation records, supporting evidence, and internal data management procedures to respond to customer or verifier requests.

6. Assess potential CBAM cost impact: Estimate certificate cost exposure based on embedded emissions and EU ETS-linked CBAM certificate pricing.

7. Integrate CBAM into contract and customer communication processes: Prepare standard responses, data templates, and technical explanations for EU customer questionnaires and supplier audits. 

How REACH24H Can Help

REACH24H provides modular and one-stop CBAM compliance support for global manufacturers, exporters, traders, EU importers, and indirect customs representatives. Our services integrate with our broader Sustainability Solutions, including Corporate Carbon Accounting and Product Carbon Footprint & Carbon Labeling.

Why Choose REACH24H for EU CBAM Compliance?

REACH24H combines regulatory expertise, carbon data management capability, and supply chain communication experience to help companies manage CBAM requirements in a practical and business-oriented way. As a pioneer in sustainability services, we bring:

• In-depth Regulatory Expertise: Deep understanding of EU climate and trade policies, including CBAM, EUDR, and ESG reporting frameworks.

• Certified Technical Team: Our team includes CCAA-registered Greenhouse Gas Verifiers, Authorised Carbon Label Evaluators, and master's graduates from top global universities.

• Proven Track Record: We have extensive experience in CBAM pilot cases, carbon inventory projects, and complex import/export compliance. We recently empowered a client to secure an EcoVadis Platinum medal, ranking among the global top 1% ^[3].

• Recognised Authority: REACH24H is accredited as an "Authorised Carbon Label Evaluator" and an "AAA Low-Carbon Service Provider," with services spanning Carbon Emissions Research, CDP Questionnaire support, and Environmental Product Declarations (EPD).

We help companies avoid misinterpreting CBAM as a simple tariff, establish reliable data collection processes, and connect CBAM compliance with broader green trade requirements, such as the Science Based Targets initiative (SBTi).

Frequently Asked Questions