CBAM for European Importers: A Practical Guide

What CBAM is and why it exists

The Carbon Border Adjustment Mechanism is an EU climate policy tool introduced under Regulation (EU) 2023/956. Its purpose is to prevent carbon leakage: the risk that companies in the EU relocate production to countries with weaker emissions rules, or that EU importers substitute EU-made goods with imports from lower-regulation origins, thereby undermining the EU Emissions Trading System (EU ETS).

The mechanism works by applying a price on the embedded carbon emissions in certain imported goods that mirrors the price EU producers pay under the EU ETS. If the goods were produced in a country that already charges a meaningful carbon price, that charge can be deducted from the CBAM obligation. If there is no equivalent carbon cost in the country of production, the full EU carbon price applies.

CBAM is not a tariff. It is a certificate obligation. The number of certificates you must surrender is determined by the verified embedded emissions in your imports, not by the value of the goods.

What goods are covered

Coverage is defined by specific CN (Combined Nomenclature) codes listed in Annex I of the Regulation. The sectors currently in scope are:

The list will expand. The European Commission has signalled further sectors (notably organic chemicals and polymers) as candidates for a future phase. If you import materials adjacent to current coverage, monitor the legislative pipeline.

Verifying your CN codes is the first compliance step. Not every product in a covered sector is in scope. A steel importer may have some product lines under CBAM and others outside it. The distinction matters for both compliance and cost modelling.

The two periods: transitional and definitive

Transitional period (October 2023 - December 2025)

During the transitional period, importers with CBAM-covered goods were required to submit quarterly CBAM reports containing embedded-emissions data for their imports. No certificates were required, and no financial obligation applied. The purpose of the transitional period was to build the data infrastructure, test reporting systems, and give supply chains time to collect emissions data from producers.

If you imported covered goods during this period and did not submit reports, you may face scrutiny from competent national authorities. Regulators have indicated that transitional non-compliance is being reviewed.

Definitive period (from 1 January 2026)

The financial obligation applies from the start of 2026. Each year, authorised CBAM declarants must:

• File an annual CBAM declaration by 31 May for the preceding calendar year
• Surrender CBAM certificates equal to the verified embedded emissions in their imports from that year
• Maintain a minimum threshold of certificates in their CBAM registry account throughout the year

Certificates are purchased from national competent authorities at a price derived from the average EU ETS auction price in the previous calendar week. The price fluctuates with the EU carbon market.

What importers must do

Become an authorised CBAM declarant

Only authorised declarants can import CBAM-covered goods and file the required declarations. To obtain authorisation, you must register with the competent national authority in your EU member state of establishment. Authorisation involves demonstrating financial solvency and providing information about your import activity. You can engage a customs representative or specialist intermediary to manage the practical process, but the declarant authorisation must be held by a legal entity established in the EU.

If you are not yet authorised and you are importing covered goods, this is the highest-priority action item. Imports of covered goods without declarant status are not permitted under the definitive regime.

Collect embedded-emissions data from suppliers

The CBAM certificate obligation is calculated from the embedded emissions in your goods. Embedded emissions are the greenhouse gas emissions produced in the manufacturing process, expressed in tonnes of CO₂ equivalent per tonne of goods.

Your supplier must provide this data using the methodology specified in EU implementing regulations. For most covered goods, this means direct emissions from the production process plus, for certain categories, indirect emissions from electricity consumption. The data must be verifiable, either through third-party verification or, during the current transition to full verification requirements, through supplier declarations under specific conditions.

Getting this data from overseas suppliers (particularly smaller manufacturers in Turkey, India, China, or Ukraine) is one of the most operationally challenging aspects of CBAM. Many suppliers have not yet invested in emissions measurement infrastructure. Starting the conversation early, and making emissions data provision a contractual requirement for new supplier agreements, is the most effective approach.

Apply default values when supplier data is unavailable

Where verified embedded-emissions data cannot be obtained, EU default benchmark values apply. These defaults are set at approximately the 95th percentile of emissions intensity for each product in the EU, which in practice means they reflect the emissions profile of the least-efficient EU producers. For efficient producers in countries like Turkey (which has a functioning ETS for steel), the default values will typically overstate actual emissions and therefore overstate CBAM cost.

The financial incentive to collect real data is clear. If your supplier is an efficient producer, verified data reduces your certificate obligation relative to the default. The default should be treated as a ceiling, not as an accurate estimate.

Deduct carbon costs already paid in the country of production

The CBAM obligation is reduced by the effective carbon price already paid at the point of production. If your goods were produced in a country with an emissions trading system or carbon tax, and you can document the carbon cost paid per tonne of CO₂, that amount is deducted from the CBAM certificate cost. This is the mechanism designed to prevent double-charging where equivalent carbon pricing is already in place.

How CBAM adds to landed cost

CBAM is a direct addition to the landed cost of covered goods. The cost per unit depends on three variables: the embedded emissions intensity of the specific goods, the EU carbon price at the time of certificate purchase, and the deduction for carbon costs already paid in the country of production.

For a steel importer purchasing hot-rolled coil, the CBAM cost per tonne will vary depending on whether the steel was produced via the carbon-intensive blast furnace/basic oxygen furnace route (higher embedded emissions) or the lower-emission electric arc furnace route. The difference between these production routes is reflected in the certificate obligation.

The EU carbon price is not fixed. It trades on the EU ETS market and has shown significant volatility. Building a CBAM cost assumption into landed cost models requires a view on the expected carbon price for the period in question, which introduces a pricing risk not present in traditional tariff calculations.

For regular importers of covered goods, CBAM is now a material cost line that must be modelled before sourcing decisions are made, not reconciled after the fact.

Common pitfalls

Assuming CBAM only matters for large importers. The obligation applies to all authorised declarants regardless of import volume. There is no SME exemption in the financial obligation phase.

Using a single emissions value for all imports of a product. Embedded emissions vary by production route, country, and even by specific installation. Using a single average for all steel imports, for example, will either overestimate or underestimate the obligation depending on your actual supply mix.

Failing to model CBAM at the sourcing stage. CBAM cost differences between origins can be significant for carbon-intensive products. A sourcing decision made without CBAM in the model may look different once the full cost is visible.

Treating the transitional period as the permanent reporting standard. The reporting requirements in the definitive period are more demanding than the transitional quarterly reports. Third-party verification of embedded emissions data is being phased in. The data infrastructure you built for transitional reporting may need upgrading.

Ignoring downstream product coverage. Some importers focus on raw material CBAM (slab, billet, ingot) without reviewing whether their downstream product imports (tubes, bars, components) are also in scope. Check every CN code you import against the current Annex I list.