CBAM Carbon Border Adjustment Mechanism: 2026 Guide

The EU’s CBAM carbon border adjustment mechanism became a live financial obligation on 1 January 2026, and the numbers are large enough to reshape procurement decisions across entire industries. Across iron and steel, aluminium, fertiliser, and cement, total CBAM costs could exceed €12 billion in 2026 alone, roughly 15% of the value of these imports. For sustainability teams, procurement directors, and LCA practitioners at manufacturing brands, that figure is not an abstraction. It is a direct signal that product-level carbon data has moved from “nice to have” to a line item in the cost of goods sold. This guide explains how the mechanism works, what the compliance steps look like in practice, and why the quality of your embedded emissions data matters more than any spreadsheet approximation.

Key Takeaways

• The CBAM regulation was formally adopted in April 2023 and became fully operational on 1 January 2026, covering iron and steel, cement, fertilisers, aluminium, electricity, and hydrogen.
• CBAM requires EU importers to buy CBAM certificates to cover the price difference resulting from ETS allowances that producers in the EU must use to cover their CO₂ emissions.
• The Q1 2026 CBAM certificate price was €75.36/tCO₂e; the Q2 2026 price has since been published at €75.28/tCO₂e.
• If companies cannot provide reliable emissions data, regulators may apply standardised default values, which are often higher and result in increased costs.
• In December 2025, the European Commission proposed further measures to strengthen CBAM, including extending its scope to a larger number of downstream products containing significant quantities of iron, steel, or aluminium.

What Is the CBAM Carbon Border Adjustment Mechanism?

CBAM is not a carbon tax, not a tariff, and not a border duty. It is a certificate-based mechanism that equalises the carbon cost between goods produced inside the EU under the EU Emissions Trading System and equivalent goods imported from countries without comparable carbon pricing.

The logic is straightforward. Carbon leakage occurs when EU industries, facing carbon costs under the ETS, lose market share to competitors in countries where production generates equivalent CO₂ but no equivalent price is paid. Before CBAM, the EU’s answer to this problem was to hand out free ETS allowances to exposed industries. The introduction of CBAM changes the EU’s strategy by applying carbon pricing both to domestic production and to foreign producers who sell in the EU, levelling the playing field.

As of October 2023, Regulation 2023/956 introduced the EU’s CBAM with the objective of reducing carbon emissions, putting a fair price on the carbon emitted during the production of carbon-intensive goods imported into the EU, and encouraging cleaner industrial production through a methodology aligned with the Paris Agreement and the EU Fit for 55 package.

The Transition From Reporting to Paying

On 1 January 2026, the EU CBAM entered its compliance phase, bringing the 2023–2025 transitional period to an end. The difference between the two phases is substantial. During the transitional period, the obligations of the importer were limited to reporting obligations only, without paying any financial adjustment. From 2026 onwards, that changes fundamentally. From 1 January 2026, importers began paying for embedded emissions using CBAM certificates, marking a change that impacts both procurement costs and supplier relationships.

Following the adoption of the EU’s Omnibus simplification package, importers bringing 50 tonnes or more of CBAM-covered goods per year into the EU must declare the embedded emissions of their imports and surrender the corresponding number of CBAM certificates the following September, with the first declaration and surrender deadline set at 30 September 2027 for emissions embedded in imports during 2026.

Which Sectors and Products Are Covered?

CBAM puts a fair price on carbon emitted during production of imported carbon-intensive goods in key sectors: iron and steel, cement, fertilisers, aluminium, electricity, and hydrogen. Coverage is determined by the product’s Combined Nomenclature (CN) code. Coverage is based on the CN code of the product being imported, not the end use or the material content. If your imported product has a CN code listed in Annex I, it is a CBAM good.

To prevent circumvention of the rules, CBAM also applies to some finished or semi-finished goods made from CBAM-covered materials. Certain downstream products such as screws, bolts, nuts, washers, and pipe fittings are included, especially when their origin or material composition suggests they are derived from high-emission steel.

One important exemption applies at the small-importer level. A new single mass-based threshold exempts importers that bring in 50 tonnes or less (cumulative net mass) of CBAM-covered goods into the EU per year, meaning roughly 90% of companies are exempt from the CO₂ border adjustment.

An Expanding Scope

The six-sector list is not the end state. In December 2025, the European Commission proposed further measures to strengthen and expand CBAM, including extending its scope to a larger number of downstream products that are not raw materials but contain large quantities of iron, steel, or aluminium. In total, the Commission is proposing to add 180 downstream products, selected because they combine a high risk of carbon leakage with a high share of steel and/or aluminium in their composition, on average 79% by content.

Sectors that would be impacted by the proposed changes include machinery, hardware and fabrications, vehicle components, domestic appliances, and construction equipment. The practical implication: a furniture manufacturer importing steel-framed office products, or a brand sourcing aluminium-intensive components, should already be mapping their exposure to the next wave of coverage.

Consider construction materials. Devera’s ISO 14040/44-compliant benchmarks show that a typical brick carries a median footprint of 0.98 kg CO₂e per kilogram, with manufacturing accounting for 47.8% of that total and transport adding another 26.2%. A seemingly modest number, but multiply it across the tens of millions of bricks imported into the EU annually and the embedded-emissions mass becomes commercially significant under a certificate price sitting above €75 per tonne. Producers who can demonstrate below-benchmark emissions through verified data stand to gain a real cost advantage over those who fall back on default values.

How the Certificate Price Is Set

The methodology ensures that the price of CBAM certificates reflects the average price of EU Emissions Trading System allowances, thereby maintaining consistency between the carbon cost applicable to EU producers and that applied to imports into the EU.

In 2026, the Commission calculates and publishes four quarterly prices, one for each calendar quarter. From 2027 onwards, the Commission will calculate and publish weekly prices. That shift to weekly pricing matters for planning: a certificate bought in February may cost significantly less, or more, than one purchased in August.

The financial exposure is not hypothetical. Every 0.1 tCO₂e per tonne difference in emissions intensity changes cost by approximately €9 per tonne, directly impacting margins. For high-volume importers, that sensitivity makes the quality of your embedded-emissions data a strategic finance issue, not just a compliance checkbox.

Calculating Embedded Emissions: Where LCA Meets Regulation

This is where the CBAM carbon border adjustment mechanism intersects directly with product-level measurement methodology. The CBAM calculation is tied to the production process of the relevant good and to the greenhouse gases defined for that good. The objective is not the plant-wide carbon footprint but the embedded emissions per imported unit of a specific CBAM product.

For CBAM purposes, the calculation focuses on the cradle-to-gate process, specifically examining raw material extraction and manufacturing. This excludes marketing distribution, product usage, or end-of-life disposal. That is a narrower system boundary than a full lifecycle assessment, but the measurement discipline required is the same.

Internationally recognised standards like ISO 14067 (Carbon Footprint of Products) or the GHG Protocol can be used to calculate emissions, providing guidelines for boundary setting, allocation methods, and data requirements. The incentive to use primary data is strong. Emissions data must cover the 2026 period and be verified by a third-party accredited verifier. Without verified data, country-level default values must be used. Default values are typically conservative, meaning they inflate your declared emissions and raise your certificate obligation.

The data-quality gap is also a competitive one. As the financial implications of CBAM affect the prices of imported covered goods, companies need to assess their competitiveness on a new metric: the carbon content of their products. Third-country producers will face greater pressure to lower emissions because importers will favour goods that have a lower carbon content, as it will be less expensive for them.

To understand why granular, phase-level data matters, look at the breakdown for a structurally intensive product. Devera’s benchmarks show that a typical car tyre carries a median footprint of 41.41 kg CO₂e, with raw materials alone responsible for 65.0% of total impact and manufacturing contributing 27.8%. While tyres are not currently in CBAM scope, the carbon distribution pattern illustrates a broader truth: for steel- and aluminium-intensive goods entering the proposed downstream expansion, the vast majority of regulated emissions sit in the upstream production phases that CBAM specifically targets. A manufacturer who knows exactly where in the production chain those emissions arise is in a far stronger position to act on them, and to prove it to their EU importer.

For brands working across both regulated and non-regulated product categories, understanding how to calculate your product carbon footprint using a consistent, auditable methodology is increasingly the foundation for both CBAM compliance and broader sustainability reporting. Our guide to Life Cycle Assessment: The Complete Guide (2026) explains the underlying methodology and how it connects to regulatory frameworks.

The Omnibus Simplifications: What Changed

On 20 October 2025, amendments to the EU CBAM took effect, adopted as part of the EU’s Omnibus simplification package, aiming to reduce the administrative burden for EU importers of CBAM-covered goods and producers in third countries.

The key changes affecting compliance teams are summarised below.

Area	Before Omnibus	After Omnibus (from Oct 2025)
Annual declaration deadline	31 May	30 September
Quarterly certificate holding	80% of embedded emissions	50% of embedded emissions
De minimis threshold	None	50 tonnes per year (net mass)
Default values	Global averages (transitional)	Country- and product-specific values

The calculation of embedded emissions also takes into account an adjustment factor reflecting the sectoral free allocation of allowances still provided to EU producers, in line with the gradual phase-out of free allocation for CBAM-covered sectors in the EU ETS from 2026 to 2034.

The CBAM phase-in factor ramps up the share of emissions covered each year, starting low and reaching 100% by 2034. Companies that begin building robust measurement infrastructure now will face progressively lower incremental costs over the next decade compared to those who scramble to comply as each phase-in step arrives.

What the Downstream Expansion Means for Manufacturers

The proposed reform to extend the mechanism beyond basic materials responds to growing concerns that rising EU carbon prices could intensify downstream carbon leakage and avoidance strategies. In plain terms: if finished goods that contain large volumes of regulated materials are not themselves covered, importers can sidestep the mechanism by switching from raw commodity imports to finished product imports.

Manufactured goods with significant steel or aluminium content, such as washing machines, would also be covered under the expansion, as would some electrical goods and furniture. EC analysis indicates that China would be the most exposed trading partner, with additional downstream exports to the EU of around €18 billion per year, followed by Türkiye at €8 billion, the United States at €6 billion, the United Kingdom at €5 billion, and Japan at €3 billion.

For sustainability professionals at brands, the downstream expansion raises a question that goes beyond which CN codes land in scope. The expansion makes the carbon intensity of steel and aluminium components a due-diligence variable in every sourcing decision. Furniture is one category that will face heightened scrutiny. Devera’s benchmark for a wardrobe shows a median footprint of 159.41 kg CO₂e per unit, with raw materials accounting for 39.9% of impact and manufacturing a further 26.8%. For steel-framed or metal-hardware-intensive furniture products that fall within the new downstream categories, that raw materials share is precisely where CBAM’s financial lever will apply. Brands that have already mapped their bill of materials to emission intensities will be able to respond to supplier requests for verified data, and to make more defensible sourcing choices, faster than those starting from scratch.

This is also where ISO 14067 methodology becomes a practical asset rather than an academic reference: a product carbon footprint calculated to ISO 14067 standards, covering raw materials and manufacturing stages, generates exactly the kind of cradle-to-gate data that a CBAM declaration requires.

Compliance Checklist for Importers

While every situation differs by sector and volume, most companies affected by CBAM need to work through the following steps before the 30 September 2027 first declaration deadline.

• Confirm whether your imported goods are listed in Annex I of Regulation (EU) 2023/956 by matching CN codes.
• Obtain authorised CBAM declarant status through your national competent authority (mandatory for goods above the 50-tonne de minimis threshold).
• Collect installation-level embedded emissions data from your non-EU suppliers, distinguishing direct from indirect emissions as required by Annex II.
• Arrange third-party verification of that data for the 2026 reporting period. Verification quality depends on emissions data workflow discipline, not only formulas, and importer-manufacturer coordination is central to declaration quality and audit defensibility.
• Track the quarterly CBAM certificate price through the European Commission’s Taxation and Customs Union page and model your 2027 surrender obligation.
• Begin monitoring the scope-expansion proposal, especially if you source downstream steel- or aluminium-intensive goods.

For brands managing portfolios across multiple product categories, the parallel demands of CBAM compliance, CSRD reporting, and customer-facing sustainability claims all point to the same underlying need: product-level carbon data that is granular, methodology-sound, and independently verifiable.

Frequently Asked Questions

What is the CBAM carbon border adjustment mechanism and how does it work? CBAM is a certificate-based mechanism that equalises the carbon cost between goods produced inside the EU under the EU Emissions Trading System and equivalent goods imported from countries without comparable carbon pricing. EU importers must surrender certificates priced at the EU ETS rate for each tonne of CO₂ equivalent embedded in their imports, with the first surrender deadline falling on 30 September 2027 for 2026 imports.

Which goods are in scope for EU CBAM compliance in 2026? CBAM currently applies to iron and steel, cement, fertilisers, aluminium, electricity, and hydrogen imported into the EU. Coverage is determined by the Combined Nomenclature code of the imported product, and a de minimis exemption applies to importers bringing in 50 tonnes or less per year. A proposed expansion would add up to 180 downstream product categories, including vehicle components, domestic appliances, and construction equipment.

How are embedded emissions calculated for CBAM declarations? The calculation focuses on direct and indirect greenhouse gas emissions generated at the production installation, covering the cradle-to-gate stages of raw material extraction and manufacturing. Emissions data must cover the full 2026 period and be verified by a third-party accredited verifier. Without verified data, country-level default values must be used, which are typically higher and increase certificate costs.

What is the current CBAM certificate price and how is it set? The Q1 2026 CBAM certificate price was €75.36/tCO₂e, published by the European Commission on 7 April 2026; the Q2 2026 price is €75.28/tCO₂e, the current official price as of July 2026. The methodology ensures that the certificate price reflects the average price of EU ETS allowances, maintaining consistency between the carbon cost applicable to EU producers and that applied to imports. From 2027, prices will be calculated and published weekly rather than quarterly.

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For sustainability teams who need defensible numbers tied directly to their bill of materials, not approximated from industry averages, Devera maps your products to ISO 14040/44 methodology and auditable emission factors from Ecoinvent and DEFRA. Whether you are building the embedded-emissions dataset that your EU importers will demand, or running a portfolio-level view across dozens of SKUs, explore how Devera handles product carbon footprints at scale.