EU CBAM compliance for importers runs through 11 mandatory steps, from scope determination to 4-year record retention, with the first certificate surrender deadline falling on September 30, 2027. Over 12,000 EU importers had submitted authorization applications by January 2026, yet thousands more who import iron, steel, cement, aluminium, fertilizers, electricity, or hydrogen still face immediate action. This guide covers the complete EU CBAM importer obligation chain: who is in scope, how to become an authorized CBAM declarant, how to calculate embedded emissions, how to purchase and surrender certificates, and what records to maintain.
What EU CBAM Means for Importers
EU CBAM (Carbon Border Adjustment Mechanism) is a certificate-based regulatory obligation established by Regulation (EU) 2023/956, amended by Regulation (EU) 2025/2083, requiring EU importers of carbon-intensive goods to purchase and surrender CBAM certificates proportional to the embedded greenhouse gas emissions of those imports, priced at the EU ETS carbon price.
CBAM is not a tariff and not a customs duty. It is a certificate mechanism that mirrors the cost EU domestic producers pay under the EU Emissions Trading System (EU ETS). The mechanism entered its definitive phase on January 1, 2026, replacing the 2-year transitional reporting period that ran from October 1, 2023 through December 31, 2025.
Six sectors fall under CBAM: iron and steel, cement, aluminium, fertilizers, electricity, and hydrogen. EU importers whose annual imports of covered goods exceed 50 tonnes per calendar year (electricity and hydrogen have no de minimis threshold) must register, calculate emissions, and surrender certificates. The first CBAM declaration covering calendar year 2026 imports is due September 30, 2027.
Understanding the full scope of CBAM importer obligations before reviewing the step-by-step workflow is essential. The EU CBAM guide provides the foundational regulatory context, including the legal basis under Article 192(1) TFEU, the six covered sectors, and how CBAM interacts with EU ETS free allocation.
Caption: The EU CBAM importer compliance lifecycle spans authorization, emissions calculation, certificate purchase, declaration, and record retention.
The 11 Steps of CBAM Importer Compliance
The 11 CBAM importer obligations are ordered chronologically across the compliance lifecycle, from initial scope determination through annual record-keeping. Each step carries regulatory weight under Regulation (EU) 2023/956 and its implementing regulations.
Step 1: Determine Whether CBAM Applies to Your Imports
CBAM applies to EU importers when 3 conditions are satisfied simultaneously: the product's CN code appears in Annex I of Regulation (EU) 2023/956, the importer's total annual net mass of CBAM goods exceeds 50 tonnes across all covered sectors, and the goods originate from a country not listed in Annex III (Iceland, Liechtenstein, Norway, Switzerland, and EU territories).
Annex I covers goods classified under CN codes in iron and steel (Chapters 72 and 73), cement (CN codes 2523 10 through 2523 30), aluminium (Chapter 76), fertilizers (Chapter 28 ammonia and Chapter 31 nitrogen fertilizers), electricity (CN code 2716 00 00), and hydrogen (CN code 2804 10 00). The CN code of the imported product determines CBAM applicability, not the commercial description.
The 50-tonne de minimis threshold applies per importer per calendar year, aggregated across all CBAM good types. Electricity and hydrogen imports are excluded from this threshold: all volumes, regardless of size, trigger CBAM obligations. Turkey is not exempt despite its EU Customs Union relationship. The origin country under EU customs rules, not the country of export or shipment, determines whether the exemption applies.
Step 2: Apply for Authorized CBAM Declarant Status
Only an authorized CBAM declarant (Article 3(15) of Regulation (EU) 2023/956) can legally import CBAM-covered goods under the definitive phase. This authorization is the first action any EU importer must take. Applications submitted by March 31, 2026 benefit from a provisional import provision, allowing continued importing while the competent authority processes the application (Article 17(7a), inserted by Regulation (EU) 2025/2083). Applications submitted after that date receive no provisional status.
Authorization applications are filed through the Authorization Management Module (AMM) of the CBAM Registry at cbam.ec.europa.eu, with the competent authority of the member state where the importer is established (VAT registration determines the applicable member state). The application requires a valid EORI number, business registration documents, a tax identification number, audited financial statements for the preceding 2 to 3 years, evidence of 5-year customs and tax compliance history (no serious violations, no convictions for tax fraud or smuggling, no active insolvency proceedings), a description of the CBAM goods to be imported including CN codes and estimated annual tonnage, and an internal CBAM compliance procedures document.
The competent authority has a maximum of 120 days from receipt of a complete application to issue a decision (Article 4(1) of IR 2025/486). The 120-day clock pauses during information requests. Grounds for refusal include serious customs violations in the prior 5 years, criminal convictions for tax fraud or environmental offenses, and active EU financial sanctions.
The process of becoming an CBAM authorized declarant requires advance preparation of compliance documentation that can take 4 to 8 weeks to assemble correctly.
Step 3: Access the CBAM Registry
After authorization, the national competent authority creates a CBAM account in the EU CBAM Registry, operated by DG TAXUD (Directorate-General for Taxation and Customs Union) through the UUM&DS authentication system. UUM&DS is the same authentication platform used for EU ETS Registry access, meaning EU ETS participants can use existing credentials.
The CBAM Registry account contains the importer's CBAM account number, authorization details, import transaction records automatically populated from customs data shared under IR 2025/2619, certificate holdings, purchase history, and declaration history. The certificate purchase module becomes active on February 1, 2027.
Step 4: Classify All CBAM-Affected Import Shipments
For each import shipment of Annex I goods, 5 data points must be recorded at the time of import: the CN code of each product, the net mass in tonnes (or MWh for electricity), the country of origin under EU customs origin rules, the name and postal address of the production installation where the goods were produced, and the production route used (for example, blast furnace-basic oxygen furnace vs. electric arc furnace for steel).
This data feeds directly into the annual CBAM declaration. Customs authorities automatically share import data with the CBAM Registry under IR 2025/2619, but the importer remains responsible for the accuracy of production installation details, which customs records do not automatically capture. Failure to collect production installation data at import time makes retrospective reconstruction extremely difficult.
Step 5: Obtain Embedded Emissions Data from Non-EU Producers
Embedded emissions data is the most operationally challenging requirement for EU CBAM importers. The importer must obtain from each non-EU production installation: specific direct embedded emissions per tonne of goods (in tCO₂e/t), specific indirect embedded emissions for cement and fertilizers, the production route classification, a reference to the monitoring plan at the installation, and supporting measurements and calculations.
The European Commission provides a CBAM Operators Portal where non-EU installation operators can upload and share emissions data directly with authorized declarants. Importers who cannot obtain specific data from their suppliers may use default values published in Implementing Regulation (EU) 2025/2621. Default values carry a punitive mark-up: 10% above the country-specific average in 2026, 20% in 2027, and 30% from 2028 onward (fertilizers are capped at 1% mark-up due to food security considerations). The default value for Chinese steel slab, for example, is 3.167 tCO₂e/t, significantly above the actual measured value at most Chinese producers, creating a strong financial incentive to provide actual data.
Using default values does not require third-party verification. Using actual measured values does require accredited verifier sign-off before the annual declaration can be filed.
Step 6: Engage an Accredited Verifier for Actual Emission Values
Third-party verification of specific embedded emissions is required before submission of any CBAM declaration that uses actual (non-default) values, under Article 8 of Regulation (EU) 2023/956 as amended. Verifiers must be accredited under EN ISO/IEC 14065 by a national accreditation body recognized by European Accreditation (EA) and registered in the CBAM Registry. Verifier registration opens September 1, 2026.
The first verification period (covering 2026 imports) requires a mandatory physical site visit to the non-EU production installation. Remote verification is not permitted for the initial period. Given the September 30, 2027 declaration deadline, verifiers have approximately 13 months after registration opens to complete site visits globally. Verifier fees range from €5,000 to €50,000 per production installation depending on complexity. Importers with dozens of non-EU suppliers face significant verification costs and should begin identifying and contracting accredited verifiers during 2026.
The European Accreditation Task Force on CBAM was established in March 2026. The verification bottleneck is real: thousands of non-EU production installations require first-period site visits before September 2027.
Step 7: Track the Quarterly Holding Requirement
The quarterly holding requirement applies from 2027 onward. At the end of each calendar quarter, authorized CBAM declarants must hold in their CBAM registry account certificates equal to at least 50% of the cumulative embedded emissions of all CBAM goods imported since the start of that calendar year, adjusted for the SEFA (Specific Embedded Free Allocation) methodology (Article 22(2), as amended by Regulation (EU) 2025/2083).
The quarterly holding threshold was reduced from the original 80% to 50% by the Omnibus simplification. The national competent authority sends a formal notice if the threshold is not met at the end of any quarter. Failure to maintain the required holding level is a compliance breach separate from the annual certificate surrender obligation.
An example illustrates the scale: an importer that brought in goods representing 1,000 tCO₂e in embedded emissions across Q1 and Q2 of 2027 must hold at least 500 CBAM certificates in their registry account by June 30, 2027.
Step 8: Purchase CBAM Certificates from February 1, 2027
CBAM certificates go on sale February 1, 2027. Certificates are purchased exclusively from the national competent authority through the Common Central Platform. No secondary market, exchange trading, or bilateral certificate transfers exist. Certificates can only be purchased from and sold back to the competent authority.
The CBAM certificate price for 2026 imports is the quarterly average of EU ETS auction clearing prices during each quarter of importation (Article 22(1a), inserted by the Omnibus). Importers purchasing certificates in early 2027 to cover 2026 imports already know the 2026 quarterly average prices before purchase. The certificate price for 2027 and subsequent imports is the weekly average of EU ETS auction closing prices (Article 22(1)).
The EU ETS carbon price as of late March 2026 is approximately €70 per tonne CO₂ (Q1 2026 range: €66 to €90). CBAM certificate prices have no artificial ceiling and no equivalent of the EU ETS Market Stability Reserve. The gross CBAM cost calculations for 2026 at €70 per tonne are listed below.
The table below shows gross CBAM costs per tonne of imported product at the current reference price, before the free allocation adjustment that reduces the 2026 net obligation to 2.5%.
| Product | Emission Factor (tCO₂/t) | Gross Cost @ €70/tCO₂ | Net Cost in 2026 (2.5% factor) |
|---|---|---|---|
| Steel (blast furnace, BF-BOF) | ~2.0 | ~€140/t | ~€3.50/t |
| Steel (electric arc, EAF scrap) | ~0.5 | ~€35/t | ~€0.88/t |
| Cement (Portland) | ~0.83 | ~€58/t | ~€1.45/t |
| Primary aluminium (direct only) | ~1.5 | ~€105/t | ~€2.63/t |
| Urea fertilizer | ~2.5 | ~€175/t | ~€4.38/t |
| Grey hydrogen (SMR) | ~9–12 | ~€630–840/t | ~€15.75–21/t |
Net cost formula: Gross CBAM cost × CBAM factor. In 2026 the CBAM factor is 2.5% because 97.5% of EU ETS free allocation for domestic producers remains. This factor rises steeply: 5% in 2027, 10% in 2028, 48.5% by 2030, and 100% by 2034.
The buyback provision allows authorized declarants to sell back up to 50% of certificates purchased in a given year, at the original purchase price, by October 31 of the surrender year (Article 23, as amended). Certificates not surrendered or bought back by November 1 are cancelled (Article 24(1)).
Step 9: Submit the Annual CBAM Declaration by September 30
The annual CBAM declaration is submitted via the CBAM Registry to the national competent authority by September 30 of the year following the import year. The first declaration deadline is September 30, 2027, covering all CBAM goods imported during calendar year 2026. Subsequent declarations follow the same September 30 deadline each year.
The declaration must contain (Article 6, as amended by Regulation (EU) 2025/2083): total quantity of CBAM goods imported during the calendar year by goods type and country of origin, total specific embedded emissions per goods type and country of origin in tCO₂e/t, total CBAM certificates to be surrendered after all adjustments, Article 9 carbon price deductions claimed with supporting documentation, verification report references for actual emission values, and the SEFA free allocation adjustment calculation.
The Article 9 deduction applies when the non-EU production installation has effectively paid a legally binding carbon price for the specific embedded emissions of the exported goods. The deductible amount equals the foreign carbon price paid (in euros per tCO₂) multiplied by the specific embedded emissions, divided by the CBAM certificate price. Voluntary carbon offsets and internal corporate carbon prices are categorically excluded. The Commission publishes a list of qualifying carbon pricing schemes (expected from 2027). South Korea's K-ETS and the UK ETS are under assessment as of April 2026; China's ETS does not currently qualify because it is intensity-based rather than an absolute cap.
At the time of declaration filing, the authorized declarant surrenders the CBAM certificates corresponding to net verified embedded emissions. Certificates are immediately cancelled in the registry upon surrender.
The penalty for failing to surrender sufficient certificates is €100 per tonne CO₂e not covered, inflation-adjusted from the base year (Article 26(1), as amended). Unauthorized persons importing CBAM goods without declarant status face penalties of €300 to €500 per tonne CO₂e.
Step 10: Manage Excess Certificates via Buyback
Excess certificate management is a standard compliance task for importers whose actual import volumes or verified emission values fall below initial estimates. The buyback provision (Article 23, as amended) allows authorized declarants to resell up to 50% of certificates purchased in a given calendar year, at the original purchase price, by October 31 of the surrender year. Certificates purchased but not surrendered and not bought back by November 1 are cancelled.
The 50% buyback cap means importers can purchase certificates at up to 2 times their expected surrender requirement and sell back the excess after the declaration is filed, providing a hedge against the quarterly holding requirement without unlimited price risk.
Step 11: Maintain Records for 4 Years
All CBAM compliance records must be retained until the end of the 4th year following the declaration year (Article 6(6), as amended by Regulation (EU) 2025/2083). For 2026 import records, retention runs until the end of 2031.
The 7 categories of records to retain are listed below.
- Customs declarations for all CBAM-covered goods
- Supplier and producer emissions data including monitoring plan documentation
- Third-party verification reports for actual emission values used
- CBAM certificate purchase confirmations and surrender records
- Article 9 carbon price deduction calculations and supporting evidence
- Internal CBAM compliance procedures, calculations, and methodology documentation
- Correspondence with non-EU producers, accredited verifiers, and national competent authorities
National competent authorities conduct risk-based inspections under Article 15. Inspections require no advance notice. Customs authorities automatically share import data with the CBAM Registry; discrepancies between customs records and CBAM declarations are automatically flagged for competent authority review.
CBAM Compliance Costs for EU Importers
CBAM compliance costs for importers fall into two categories: administrative costs (registration, data collection, verification, and management) and certificate costs (the financial obligation tied to the EU ETS price and embedded emissions volume). Understanding both categories is required for accurate CBAM compliance planning.
Administrative costs are largely fixed per importer and per production installation. Authorization application fees range from €0 to €2,000 depending on member state. Emissions data collection from non-EU exporters costs €1,000 to €10,000 per year depending on the number of suppliers. Third-party verification costs €5,000 to €50,000 per production installation for the first period. Internal compliance management resources, including staff time, software, and consultancy, typically run €20,000 to €100,000 or more per year for importers with diversified supply chains.
Certificate costs in 2026 are very small due to the 2.5% CBAM factor (only 2.5% of embedded emissions require certificate coverage). A practical example: an importer of 10,000 tonnes of BF-BOF steel with embedded emissions of approximately 2.0 tCO₂/t (20,000 tCO₂ total) owes 500 CBAM certificates at approximately €70 each, totaling approximately €35,000 for the full year of 2026 imports. The financial reckoning for most importers arrives after 2028, when the CBAM factor accelerates: 10% in 2028, 22.5% in 2029, and 48.5% by 2030. Importers with high-emission supply chains who delay decarbonization planning face a steep cost cliff at the 2029 to 2030 transition. The CBAM cost calculator allows importers to model these obligations across all six sectors at different ETS price assumptions and CBAM factor years.
Caption: CBAM certificate obligations rise steeply as EU ETS free allocation phases out, with the sharpest acceleration between 2029 and 2030.
What CBAM Importer Compliance Looks Like in Practice
EU CBAM importer compliance requires coordination across three business functions: procurement (identifying which suppliers can provide emissions data), legal and compliance (authorization, declaration filing, record retention), and finance (certificate purchasing, quarterly holding, budget forecasting).
Importers with long, complex supply chains face the greatest operational challenge: obtaining verified emissions data from non-EU production installations that lack monitoring infrastructure. The CBAM Operators Portal reduces friction by allowing producers to upload data directly, but producer engagement remains the practical bottleneck. Importers who cannot obtain actual emissions data from their suppliers must use default values, which are punitive by design and grow more expensive over time relative to verified actual values.
Supply chain decarbonization planning decisions made in 2026 and 2027 have compounding value. Importers who shift sourcing toward lower-emission suppliers reduce not just their 2026 certificate obligation (which is small) but their 2030 and 2034 obligations (which are substantially larger). The financial case for supplier emissions engagement strengthens every year as the CBAM factor rises.
For a structured tool covering all 11 steps in checklist format, the CBAM compliance checklist provides a downloadable action-by-action framework mapped to each regulatory deadline.
CBAM for Non-EU Exporters vs. EU Importers
The legal obligation for CBAM certificates falls entirely on the EU authorized declarant, not the non-EU exporter. Non-EU producers and exporters have no direct CBAM filing obligation. Their role is to provide accurate, verifiable embedded emissions data to EU importers.
The commercial reality, however, means non-EU exporters bear indirect CBAM consequences. EU importers facing high default-value certificate costs shift purchasing toward suppliers who can demonstrate lower actual emissions. Exporters who invest in monitoring infrastructure and third-party verification gain a direct commercial advantage: lower CBAM costs for their EU customers, which translates into price competitiveness or margin preservation.
The financial exposure created by CBAM certificates flows through to non-EU suppliers via commercial negotiation, even though the legal liability sits with the EU importer.
The full perspective on how non-EU producers can strategically respond to their EU customers' CBAM obligations is covered in CBAM for non-EU exporters.
How CBAM Embedded Emissions Are Calculated
EU CBAM embedded emissions calculations follow sector-specific methodologies defined in Implementing Regulation (EU) 2025/2547. The calculation unit is specific embedded emissions: tonnes of CO₂ equivalent per tonne of goods (or per MWh for electricity).
Direct embedded emissions cover greenhouse gas emissions from the production process at the production installation, including heat and cooling consumed during production. Indirect embedded emissions cover electricity consumption at the installation, but only for cement and fertilizers under CBAM. Iron and steel, aluminium, hydrogen, and electricity are priced on direct emissions only.
The greenhouse gases covered vary by sector. Iron and steel, cement, electricity, and hydrogen cover CO₂ only. Aluminium covers CO₂ plus perfluorocarbons (CF₄ and C₂F₆), which carry global warming potentials of 6,630 and 11,100 respectively compared to CO₂ at 1. Fertilizers cover CO₂ and nitrous oxide (N₂O).
For complex goods (goods produced using Annex I precursors), embedded emissions include the emissions of all precursor goods plus the direct emissions of the final production process. Steel pipes, for example, carry the embedded emissions of the hot-rolled coil used as input plus the emissions from the pipe-forming process.
The CBAM embedded emissions guide covers the full calculation methodology, including Equation 11 (standard method), Equation 12 (mass balance), and the sector-specific equations for cement clinker ratios and fertilizer nitrogen content.
Frequently Asked Questions: CBAM for EU Importers
Who qualifies as an authorized CBAM declarant?
An authorized CBAM declarant is a person established in the EU customs territory who has been granted authorization by the competent authority of the member state of establishment to make CBAM declarations and surrender CBAM certificates (Article 3(15), Regulation (EU) 2023/956). Only authorized declarants can legally import CBAM-covered goods during the definitive phase. Unauthorized importers face penalties of €300 to €500 per tonne CO₂e.
Does CBAM apply if annual imports are below 50 tonnes?
No. EU CBAM does not apply to importers whose total annual net mass of CBAM goods is at or below 50 tonnes per calendar year, aggregated across all CBAM sectors (Article 2(3a), as amended by Regulation (EU) 2025/2083). Two exceptions apply: electricity and hydrogen imports have no de minimis threshold, meaning all volumes trigger CBAM obligations regardless of mass.
When do CBAM certificates go on sale?
CBAM certificates become available for purchase on February 1, 2027. Purchases are made exclusively through the national competent authority via the Common Central Platform in the CBAM Registry. No secondary market, exchange trading, or bilateral certificate transfers exist under Regulation (EU) 2023/956.
Is third-party verification required for all CBAM declarations?
No. Third-party verification by an accredited verifier is required only when the CBAM declaration uses actual (measured) embedded emissions values rather than Commission default values. Using default values from IR 2025/2621 does not require verification, but default values carry a punitive mark-up of 10% in 2026, rising to 30% from 2028 onward.
Can EU importers claim a deduction for carbon prices paid in the country of origin?
Yes. EU CBAM allows importers to reduce the number of certificates surrendered when the non-EU production installation has effectively paid a legally binding carbon price for the specific embedded emissions of the exported goods (Article 9). The deductible amount is proportional to the foreign carbon price paid. The Commission publishes a list of qualifying carbon pricing schemes. Voluntary offsets and internal corporate carbon prices are excluded.
What happens if an EU importer misses the September 30 declaration deadline?
Authorized declarants who fail to surrender sufficient CBAM certificates by September 30 face a penalty of €100 per tonne CO₂e not covered, inflation-adjusted from the base year (Article 26(1), as amended by Regulation (EU) 2025/2083). Importers who operate without authorization face the higher penalty of €300 to €500 per tonne CO₂e.