Applying for CBAM Declarant Status: A Practical Guide for UK Businesses Importing into the EU

Only an authorised CBAM declarant may import CBAM goods into the EU in the definitive period, which began on 1 January 2026. Importers below the 50-tonne de minimis threshold are the exception. You apply in the CBAM registry to the competent authority of the Member State where you are established. That authority normally has 120 calendar days to decide. For a UK business, the first question is not how to apply but which entity can apply: a UK company with no EU establishment cannot, so the status has to sit with an EU subsidiary or an indirect customs representative.

Three structures for a UK seller

Regulation (EU) 2023/956, as amended by the Omnibus Regulation (EU) 2025/2083, leaves three routes open:

"Established in a Member State" means having a registered office, central headquarters or permanent business establishment there (Art. 3(19)). Under Article 4(4) of Implementing Regulation 2025/486, the competent authority must refuse an applicant not established in the Member State where it applies. An indirect customs representative must hold the status before importing, whether or not the importer it represents is exempt (Art. 5(1a) and 5(2)). Once granted, the status "shall be recognised in all Member States" (Art. 17(1)).

The EU CBAM knowledge base covers EU legislation only. Nothing in it addresses a UK carbon border scheme, and this guide makes no assumption about one.

Building the application file

The registry form reflects Article 5(5). Use this checklist:

• ☐ Name, address and contact details; main economic activity in the EU.
• ☐ An EORI number (also a stand-alone criterion under Art. 17(2)(d)).
• ☐ Certificate from that Member State's tax authority confirming no outstanding recovery order for national tax debts.
• ☐ Declaration of honour covering the previous five years: no serious or repeated infringements of customs, taxation or market abuse rules, and no serious criminal offences linked to the business.
• ☐ Evidence of financial and operational capacity. If a risk assessment calls for it, provide profit and loss accounts and balance sheets for up to three closed financial years.
• ☐ Estimated imports by type of goods and Member State of import, for this calendar year and next.
• ☐ AEO certificate number, if you hold authorised economic operator status.
• ☐ For representatives: the names and contact details of the persons you act for.

Implementing Regulation 2025/486 explains how the authority reads that file. On integrity, it looks for no decision finding serious or repeated infringements in the three years before the application, and no serious criminal offences in the five years before (Art. 9). On capacity, it checks for no bankruptcy proceedings, no material arrears on import duties and taxes, sufficient financial standing, and internal controls able to prevent and correct errors in declarations and certificate management (Art. 10). A company established for less than two years is assessed on whatever records are available.

The guarantee: likely for a new EU entity

Many UK groups set up a new EU company to import. Article 17(5) requires a guarantee whenever the applicant "was not established throughout the two financial years preceding the year" of application. The authority sets the amount at the value of the CBAM certificates you would have to surrender for your estimated imports, taking the free-allocation adjustment into account. The guarantee must be a bank guarantee payable at first demand by a financial institution operating in the EU, or another form giving equivalent assurance.

• The decision only takes effect when the guarantee is registered in the CBAM registry (IR 2025/486, Art. 7(2)).
• You must keep the guarantee at a sufficient level at all times. Adjustment deadlines are up to 2 months, extendable to 3. Missing them leads to revocation proceedings (IR 2025/486, Arts 14 and 16).
• The guarantee is released immediately after 30 September of the second year in which you have surrendered certificates (Art. 17(7)).

Timetable after you press submit

1. Day 0: the CBAM registry assigns a unique application reference number (IR 2025/486, Art. 1(4)).
2. Optional consultation: the authority may consult other competent authorities or the Commission. Since the Omnibus this is discretionary, must finish within the assessment period, and gives consulted parties at most 15 calendar days. One extension of no more than 15 calendar days is possible if a consulted party needs more time. If a consulted party does not reply in time, the criteria concerned are deemed fulfilled (IR 2025/2549, amending Arts 11 and 12).
3. Requests for information: you reply within the deadline set, at most 30 calendar days. The assessment can be extended by up to 30 days but may not exceed 180 calendar days in total (IR 2025/486, Art. 5).
4. Changes you request: these can add 30 calendar days. A substantial change may lead the authority to discard the application and ask you to reapply (IR 2025/486, Art. 2).
5. Intended refusal: you are told why and have up to 30 calendar days to comment (IR 2025/486, Art. 6).
6. Decision: due within 120 calendar days of receipt as a rule (IR 2025/486, Art. 4(1)). It takes effect on registration in the CBAM registry and notification to you.

Transitional versus definitive period

During the transitional period, from 1 October 2023 to 31 December 2025, no authorisation was needed. Importers, or their indirect customs representatives, acted as "reporting declarants" and filed quarterly CBAM reports (Art. 32 and 35). The ban on importing without authorisation (Art. 4) has applied since 1 January 2026, while the rules on applications and authorisation (Arts 5 and 17) applied from 31 December 2024 (Art. 36(2)), so applications could be lodged before the definitive period began. To smooth the changeover, Article 17(7a) let anyone who had applied by 31 March 2026 keep importing until a decision. If that application is refused, the 2026 imports are penalised under Article 26(2a), using emissions calculated from default values.

Living with the status

• Annual CBAM declaration and certificate surrender by 30 September, the first in 2027 for 2026 imports (Arts 6 and 22).
• From 2027, enough certificates on your account at the end of each quarter to cover at least 50% of embedded emissions imported so far that year (Art. 22(2)).
• Preparing declarations can be delegated to an agent acting in your name, but responsibility stays with you (Art. 5(7a)).
• The authority reassesses the status periodically, for example when your information changes or your EORI number is invalidated (IR 2025/486, Art. 18). Serious or repeated failures to surrender can lead to revocation (Art. 17(8)).

To test your own set-up, such as an EU warehouse company importing UK-made steel tubes, you can ask the knowledge base. It answers from the regulation and its implementing acts and quotes the relevant passage.

This is a summary of EU rules as amended up to December 2025 (Regulation 2025/2083 and Implementing Regulation 2025/2549), not legal advice. Competent authorities may issue their own procedural guidance, which is not included in the CBAM knowledge base.