The Carbon Border Adjustment Mechanism (CBAM): Navigating Europe’s Live Carbon Cost for Imports

The Carbon Border Adjustment Mechanism has moved from concept to reality. As of 1 January 2026, CBAM entered its definitive phase, transforming what was once a quarterly reporting exercise into a genuine financial obligation for importers of carbon-intensive goods into the EU. For businesses across steel, aluminium, cement, fertiliser, hydrogen, and electricity supply chains, understanding CBAM is no longer optional—it is now a live compliance and cost management issue. At [Company Name], we help importers, producers, and their supply chain partners navigate this mechanism with precision, from initial exposure assessment through to ongoing certificate management.

What CBAM Is, and Why It Was Introduced

CBAM was created under the EU’s “Fit for 55” package as a tool to prevent carbon leakage—the risk that carbon-intensive production simply relocates to jurisdictions with weaker climate rules—while ensuring imported goods face a carbon cost equivalent to that borne by EU producers under the EU Emissions Trading System. It is not a tariff or a customs duty in the traditional sense, but a certificate-based mechanism: importers must surrender CBAM certificates corresponding to the greenhouse gas emissions embedded in the goods they bring into the EU, priced in line with the EU ETS.

The mechanism entered its transitional phase on 1 October 2023, requiring quarterly emissions reporting without financial obligations. That phase concluded on 31 December 2025, and the definitive regime—complete with real financial liability—began on 1 January 2026.

The Omnibus Simplification: A Materially Different Compliance Picture

Before the definitive phase even began, the rules governing it changed substantially. In response to industry feedback gathered during the transitional period, the EU adopted a significant simplification package, formally Regulation (EU) 2025/2083, which entered into force on 20 October 2025. For any organisation assessing its CBAM exposure, understanding these changes is essential, since they materially reshape who is in scope and how compliance obligations unfold:

A New De Minimis Threshold
The previous €150-per-shipment trigger has been replaced with a single mass-based threshold: importers bringing in 50 tonnes or less of CBAM-covered goods per calendar year are now exempt from CBAM reporting, declaration, and certificate-surrender obligations. According to the Commission, this threshold removes roughly 90% of importers from compliance scope while still capturing about 99% of embedded emissions—though the exemption notably does not extend to hydrogen or electricity imports, which remain covered regardless of volume.

A Delayed Certificate Market
While financial liability technically began with imports from 1 January 2026, the actual sale of CBAM certificates has been postponed to 1 February 2027. This means declarants will need to acquire certificates retroactively in 2027 to cover emissions embedded in goods imported throughout 2026, with the certificate price for that year based on the quarterly average of 2026 EU ETS allowance prices.

Softer Quarterly Holding Requirements
The requirement for authorised declarants to hold certificates covering a share of their year-to-date embedded emissions has been reduced from 80% to 50% at the end of each quarter, easing liquidity pressure during the market’s first year.

A Later Annual Declaration Deadline
The deadline for the annual CBAM declaration and certificate surrender has moved from 31 May to 30 September of the year following import—meaning the first annual declaration, covering all 2026 imports, is now due by 30 September 2027.

Revised Default Emission Values
Where reliable country-specific data is unavailable, new default values are now based on the highest emission intensity observed among countries with reliable data for a given product, with these defaults set to rise progressively—by 10% in 2026, 20% in 2027, and 30% from 2028 onward—creating an incentive for importers to obtain and verify actual supplier emissions data rather than default to the (increasingly costly) standard figures.

Immediate Obligations Now in Force

Authorised CBAM Declarant Status
From 1 January 2026, only authorised CBAM declarants may import in-scope goods into the EU. Importers who applied for this status by 31 March 2026 were permitted to continue importing provisionally while their application was processed; businesses that missed this deadline risk having shipments blocked at customs.

Data Collection Throughout 2026
Even though certificates cannot yet be purchased, importers must collect verified emissions data for all CBAM goods imported during 2026, using either actual verified values or the Commission’s default values.

A Confirmed First Certificate Price
The European Commission published the first official CBAM certificate price—€75.36 per tonne of CO₂e for Q1 2026—on 7 April 2026, giving businesses their first concrete benchmark for budgeting future certificate costs.

Looking Ahead: A Mechanism Still Evolving

CBAM’s scope and rules are far from static. A proposal adopted in December 2025 would extend CBAM to roughly 180 downstream steel and aluminium products from 1 January 2028, and the Commission has also proposed a temporary Decarbonisation Fund to support energy-intensive EU industries exposed to carbon leakage risk on their export markets, where CBAM itself does not apply. Further reviews of default values, emission calculation methodology, and the potential expansion to additional sectors are expected throughout 2026 and 2027 as the Commission gathers experience from the mechanism’s first year of live operation.

Who Needs to Act, and How We Help

Importers Approaching or Above the 50-Tonne Threshold
We help businesses assess their annual import volumes across CBAM-covered goods to determine whether they fall within scope, and if so, guide them through the authorised declarant application process.

Producers and Supply Chain Partners
For non-EU producers exporting into the EU, accurate, verifiable emissions data is now a competitive advantage—buyers increasingly prefer suppliers who can provide actual emissions figures rather than the rising default values. We help producers establish the data and verification processes needed to support this.

Financial Planning and Certificate Cost Modelling
We help clients model their likely CBAM certificate costs based on current pricing trends and the specific emissions profile of their imported goods, incorporating the retroactive certificate purchase requirement for 2026 imports.

Authorisation and Registry Management
We support clients in navigating the CBAM registry, managing authorised declarant status, and meeting the quarterly holding and annual declaration requirements as they evolve under the Omnibus simplification.

Regulatory Monitoring for Scope Expansion
With downstream product coverage expanding from 2028 and further reviews ongoing, we track upcoming changes closely so clients can anticipate new obligations well before they take effect, rather than reacting after the fact.

Cross-Border Carbon Price Deduction
For imports from countries with their own carbon pricing mechanisms, we help clients identify and document eligible deductions for carbon prices already paid, reducing their net CBAM liability where applicable.

A Mechanism That Rewards Early Preparation

CBAM’s definitive phase is now live, but its practical financial impact will only become fully visible as certificate sales begin in 2027 and the first annual declarations fall due. Organisations that build robust emissions data collection and verification capability now—rather than waiting for the certificate market to open—will be far better positioned to manage costs and avoid compliance gaps. Our team is ready to help clients build that capability and stay ahead of a mechanism that continues to evolve even as it takes effect.