EU CBAM 2026–2027: Verification, Certificate Costs and Deadlines

The EU Carbon Border Adjustment Mechanism entered its definitive period on 1 January 2026, but that does not mean importers had to buy and surrender certificates that day. For goods imported in 2026, certificate purchasing begins in February 2027. The first annual declaration and matching certificate surrender are due by 30 September 2027.

That timing distinction matters. A business that waits until 2027 to assemble its 2026 import, emissions, installation, carbon-price, and verification records may discover that the underlying evidence cannot be recreated.

This guide explains what an importer, indirect customs representative, non-EU installation operator, verifier, procurement lead, and finance team should do now. It reflects the law and European Commission guidance available on 7 October 2026.

CBAM dates at a glance

The 2023–2025 transitional period was reporting-only. Its quarterly reports are useful historical evidence, but they are not the 2026 annual declaration and do not settle the financial obligation.

Step 1: decide whether the importer and goods are in scope

CBAM currently covers specified goods in cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen. The legal test is not the product's marketing name or broad industry. It is the CN code in Annex I of Regulation (EU) 2023/956, together with origin, customs procedure, importer role, and any applicable exclusion.

Create a controlled product register with at least:

• CN code and plain-language product description;
• importer of record and EORI;
• indirect customs representative, if any;
• country of origin;
• quantity and the CBAM unit;
• customs declaration reference and import date;
• documented in-scope or out-of-scope rationale.

Do not assume a finished product is outside CBAM because it is not raw metal. Annex I includes certain downstream iron, steel, and aluminium goods. Conversely, do not classify a product as covered merely because it contains steel or aluminium. The actual CN code controls.

How the 50-tonne threshold works

For goods other than electricity and hydrogen, the current single mass-based threshold is initially 50 tonnes of cumulative net mass per importer per calendar year. Electricity and hydrogen do not receive that mass-based exemption.

The control therefore needs to aggregate imports across declarations and representatives. It should warn before the threshold is reached, preserve the calculation, and detect possible product misclassification or artificial splitting. If the threshold is exceeded, teams should not treat only the excess tonnes as covered without checking the exact legal effect and their competent authority's process.

Because customs classification determines market access as well as CBAM treatment, uncertain or mixed-product classifications deserve qualified customs advice rather than an unsupported spreadsheet assumption.

Step 2: confirm the accountable parties

The annual obligation belongs to the authorised CBAM declarant. Depending on the transaction, that may be the EU importer or an indirect customs representative.

Several other parties provide essential inputs:

• Importer or indirect customs representative: controls customs data, authorisation and the annual declaration.
• Non-EU installation operator: owns the production, monitoring, precursor and emissions evidence.
• Accredited CBAM verifier: independently verifies actual emissions used in the declaration.
• National accreditation body: accredits verifiers for the relevant CBAM scope.
• National competent authority: manages authorisation and enforcement in the Member State.
• Finance or treasury: forecasts and funds certificate purchases and reconciles the liability.

A RACI chart is useful only if it names real legal entities and Registry accounts. “Sustainability owns CBAM” is not enough when customs submits entries, procurement holds supplier contracts, a non-EU plant holds emissions evidence, and finance buys certificates.

Step 3: build the 2026 data record

For each covered import, retain the import quarter, quantity, origin, installation, production route, relevant precursor data, embedded emissions, methodology, and any eligible carbon price effectively paid in the country of origin. Reconcile these records to customs declarations rather than maintaining an isolated sustainability dataset.

The quarterly import date matters because each quarter's published CBAM certificate price applies to the emissions embedded in goods imported during that quarter.

Your evidence file should make it possible for a reviewer to move in both directions:

1. From a customs declaration to the annual CBAM total, underlying installation data, calculation, verifier report, carbon-price deduction, and certificate requirement.
2. From an annual declaration line back to the complete population of customs transactions, including exclusions and corrections.

That traceability is more valuable than a polished dashboard that cannot explain its source data.

Step 4: choose between default and actual emissions

The definitive system does not require verified actual values in every case. A declarant can use applicable European Commission default values or actual emissions calculated under the definitive methodology.

Model both options before commissioning verification. If the expected certificate saving from actual values is smaller than the data, travel, site-visit, supplier and verifier cost, defaults may be the rational choice. If actual performance is materially better than the default, verification can create measurable financial value.

Record the decision by installation and goods type. A general policy such as “always use actual data” or “always use defaults” can obscure where the economic result differs.

Step 5: prepare for accredited verification

From 1 September 2026, accredited CBAM verifiers can request registration and access through the CBAM Registry. They can begin document review and site work in 2026; the first verification reports can be issued from January 2027.

If actual emissions will be used, confirm that the verifier is accredited for the relevant CBAM activity and production scope. A productive verification sequence is:

1. Define installation boundaries, goods and production routes.
2. Connect the authorised declarant, non-EU installation operator and verifier in the Registry.
3. Provide the monitoring methodology, source data, precursor treatment and calculation files.
4. Agree the site-visit approach and access to records, meters, systems and responsible personnel.
5. Resolve material misstatements, non-conformities and missing evidence before report issuance.
6. Preserve the final verification report and the exact data version used in the declaration.

Do not treat accreditation and Registry registration as interchangeable. Accreditation establishes the verifier's competence and approved scope; Registry registration enables the system workflow.

Supplier contracts should address data format, methodology, access, verifier cooperation, correction deadlines, confidentiality, and responsibility for inaccurate information. Without those terms, an importer may carry the regulatory risk while having little leverage to obtain usable evidence.

Step 6: forecast certificate cost correctly

CBAM certificate prices track EU ETS auction prices. For 2026 imports, the Commission publishes a quarterly price in euros per tonne of CO₂ equivalent. The price must be matched to the quarter in which the goods were imported.

As of this review:

• Q1 2026: €75.36 per certificate;
• Q2 2026: €75.28 per certificate;
• Q3 2026: €82.32 per certificate;
• Q4 2026: scheduled for publication on 4 January 2027.

The Q3 price is about 9.4% higher than Q2. That does not mean every importer's final CBAM cost rose by the same percentage: liability also depends on embedded emissions, the applicable phase-in treatment, EU ETS free-allocation adjustment, and any eligible carbon price paid in the country of origin. It does mean finance teams should stop carrying the Q2 price into Q3 import forecasts.

These are time-bound official values, not a forecast. Check the Commission's CBAM certificate price page before using them.

A simplified forecast starts with:

embedded emissions × applicable phase-in factor × quarterly certificate price

It then accounts for the applicable treatment of EU ETS free allocation and any eligible carbon price effectively paid in the country of origin. The legal calculation contains conditions that a simple budgeting formula cannot capture, so keep the assumptions, legal basis, exchange-rate treatment and evidence for deductions with the forecast.

Certificates for 2026 imports are purchased from February 2027 through the common central platform. The first surrender occurs with the declaration by 30 September 2027. The quarterly certificate-holding requirement begins from 2027, not retrospectively in 2026.

A practical control checklist

Scope and customs

• Map all potentially covered CN codes to Annex I.
• Aggregate cumulative net mass by importer and calendar year.
• Exclude electricity and hydrogen from the 50-tonne threshold logic.
• Confirm the authorised declarant or valid application reference used at import.
• Reconcile the CBAM register to customs records and investigate exceptions.

Emissions and verification

• Capture import quarter, origin, installation, route, precursors and carbon price paid.
• Document the default-versus-actual decision for every installation and goods type.
• Engage an appropriately accredited verifier where actual values will be used.
• Complete Registry connections and plan any required site work.
• Resolve monitoring, calculation and evidence findings before January 2027 reporting.

Certificates and filing

• Apply the correct published quarterly price to the corresponding import quarter.
• Forecast cash needs and confirm purchasing-account access for February 2027.
• Reconcile verified values, defaults, carbon-price deductions and declaration totals.
• Obtain accountable management approval.
• Submit the declaration and surrender sufficient certificates by 30 September 2027.

Where CBAM data can be reused—and where it cannot

Installation and supplier emissions data may also support GHG Protocol Scope 3 inventories or CSRD value-chain reporting. Reusing governed source data can reduce duplicate supplier requests.

The calculations are not automatically interchangeable. CBAM applies its own system boundaries, production routes, precursor rules, default values, verification requirements, import-quarter prices and legal deductions. A corporate carbon footprint or product carbon footprint is useful input, not proof that the CBAM methodology has been met.

FAQ

When did the definitive CBAM period start?

The definitive period applies to covered imports from 1 January 2026. Emissions and liability accrue for 2026 imports, but certificates for those imports become purchasable in February 2027 and the first annual declaration and surrender are due by 30 September 2027.

When can certificates for 2026 CBAM imports be purchased?

The European Commission says certificates covering 2026 imports can be purchased through the common central platform from February 2027. The quarterly price assigned to the quarter in which the goods were imported determines the certificate cost.

Is the first CBAM declaration due in May or September 2027?

It is due by 30 September 2027. Regulation (EU) 2025/2083 changed the annual declaration and certificate-surrender deadline to 30 September, first applying in 2027 to 2026 imports.

Must every CBAM declaration use verified actual emissions?

No. Declarants can use applicable European Commission default values or actual emissions. If actual emissions are used, they must be calculated under the definitive methodology and verified by an accredited CBAM verifier.

Does the 50-tonne exemption cover electricity and hydrogen?

No. The single mass-based threshold is initially 50 tonnes per importer per calendar year for goods other than electricity and hydrogen. Importers still need CN-code, role, and cumulative-mass controls to determine whether the exemption applies.

Research and review note

This article was fact-checked against official EU law and European Commission operational guidance available on 7 October 2026, including the Q3 certificate price published on 5 October. Binding legislation takes precedence over explanatory webpages or this guide. Commission guidance, prices, and Registry procedures can change as the definitive system matures.

This is general compliance information, not legal, customs-classification, accreditation, verification, tax, or investment advice. Confirm entity-specific decisions with the responsible competent authority and appropriately qualified advisers.

Official sources

1. Regulation (EU) 2023/956 — consolidated CBAM text — EUR-Lex
2. Regulation (EU) 2025/2083 — 2025 simplification amendment — EUR-Lex
3. CBAM definitive regime — European Commission
4. CBAM verification — European Commission
5. CBAM Registry — European Commission
6. Price of CBAM certificates — European Commission
7. CBAM legislation and guidance — European Commission
8. Commission guidance for CBAM verifiers and accreditation bodies — European Commission