CBAM by sector

CBAM (Carbon Border Adjustment Mechanism) currently covers six sector groups. Compare their Annex I scope patterns, threshold treatment, supplier-data routes, and first preparation questions, then use the relevant sector record for deeper context. These overviews are informational only; they are not legal, tax, or customs advice and do not determine whether a specific product is in scope — the CN goods checker is where you check an actual code.

Last updated: 2026-08-11 · Sources: Regulation (EU) 2023/956 (consolidated text) · Regulation (EU) 2025/2083 · EC DG TAXUD — Carbon Border Adjustment Mechanism · European Commission — CBAM sector resources · Commission Implementing Regulation (EU) 2025/2621 · Commission Implementing Regulation (EU) 2025/2547 · Commission Implementing Regulation (EU) 2025/2546

How should you choose among the six CBAM sector pages?

Start with the exact goods and CN-code record, then use the sector hub to compare iron and steel, aluminium, cement, fertilisers, electricity and hydrogen. The hub routes the reader; it does not classify a product or replace the goods checker.

Commercial names are not a safe sector index. A component described as metal hardware may sit under an iron-and-steel or aluminium code, while a chemical trade name may not map to the current hydrogen line. Record the code used in the underlying customs process and review it against the current Annex I snapshot before assuming a sector from the product name.

The six sector pages share a common structure but not a common data journey. Four sectors use the mass-based threshold framework, while electricity and hydrogen are excluded from that de-minimis exemption. Electricity also has a distinct default-first emissions rule. Supplier and installation records differ across production chains even where the general evidence principles are similar.

Use the hub when comparing sectors or deciding where to go next. Use a sector detail page for sector-specific preparation, a guide for a defined regulatory or evidence question, and a tool for its bounded informational function. None of those surfaces assigns a customs classification or decides a particular importer's position.

• Iron and steel: broad chapter and finished-article coverage with printed exclusions.
• Aluminium: primary, semi-finished and finished forms across a broad supply chain.
• Cement: clinker, cement and a partial-coverage ‘ex’ entry need careful goods matching.
• Fertilisers: nitrogen inputs and products with a printed exclusion inside the sector list.
• Electricity: one energy line, threshold exclusion and a default-first emissions route.
• Hydrogen: one current chemicals line, threshold exclusion and installation-method evidence needs.

What should a six-sector comparison show?

Compare each sector's scope shape, common importer questions, typical data-chain starting point, threshold exception and next preparation route. Continue into one sector when you need installation, process or evidence detail.

A useful comparison helps a mixed portfolio team see why one generic checklist is not enough. It should identify whether the Annex I list is broad or narrow, whether exclusions or partial entries demand extra attention, whether the threshold journey is relevant, and which supplier or installation link starts the evidence chain.

Keep the comparison at decision level. After choosing a sector, use its dedicated preparation material for electricity Article 7(3) evidence, hydrogen production methods, steel precursors, aluminium smelter chains, cement clinker data or fertiliser ammonia chains, with the relevant sources and qualifications visible.

For imports spanning more than one sector, split the register and route each row without inventing a portfolio-wide result. Quantity, data basis and evidence should remain traceable at goods-row level.

How do scope patterns differ across the six sectors?

Iron and steel and aluminium span many primary and downstream forms; cement and fertilisers contain narrower lists with important wording and exclusions; electricity and hydrogen each appear as a single current goods line. Exact CN-code checking remains necessary in every case.

Iron and steel combines a broad chapter-level entry, other headings and finished articles, together with printed ‘Except’ rows. That makes a chapter assumption risky: a reviewed code can sit under a broad inclusion or a stated exclusion. Aluminium also reaches from unwrought material through semi-finished forms and finished articles, so a team should not stop its review at raw metal.

Cement includes clinker and cement lines plus an ‘ex’ entry where only goods matching the printed description are covered. Fertilisers include ammonia and nitrogen-related inputs and products, with a printed exclusion under an otherwise relevant area. Partial and excluded entries should remain visible in the goods register instead of being flattened into an all-in or all-out chapter label.

Electricity and hydrogen have narrow goods lists, but narrow does not mean low effort. Electricity's data basis has its own current rule and evidence route. Hydrogen needs producer, installation and method context. The hub compares these scope shapes without expanding coverage beyond the current Annex I source.

Which sectors use the 50-tonne de-minimis journey?

The mass-based de-minimis framework can be relevant to cement, iron and steel, aluminium and fertilisers. Article 2a(4) excludes electricity and hydrogen from that exemption.

For the four mass-based sectors, first confirm which goods rows are in current scope, then maintain cumulative annual net mass for the importing legal entity. Use the threshold guide and checker for the detailed explanation and calculation journey; do not turn a volume alone into a legal conclusion.

For electricity and hydrogen, do not present ‘under 50 tonnes’ as an exemption state. Keep those rows outside the mass-based result and route the reader to their sector pages. Electricity quantities also use a different operational unit context, which is another reason not to force all six sectors into one mass column.

A mixed-sector portfolio should show two dimensions: current goods scope by row, and threshold treatment by sector. This prevents excluded goods from entering the covered-goods mass total and prevents electricity or hydrogen from disappearing because a generic dashboard filtered for tonnes.

• Mass-based threshold journey: cement, iron and steel, aluminium and fertilisers.
• Excluded from that exemption: electricity and hydrogen.
• Goods scope comes before the annual mass total.
• Keep importing legal entities and calendar years separate.

What is the common data chain across material sectors?

For cement, iron and steel, aluminium and fertilisers, connect the imported goods row to the supplier, producing operator, installation, production process, relevant precursors, reporting period, emissions basis and supporting evidence.

Begin with the import record: entity, date or period, CN code, description, origin, supplier, quantity, unit and source reference. Then identify where the goods were produced and which process or route applies. Company-level emissions and generic product footprints are harder to assess when installation and production context are absent.

For complex goods, precursor information can extend the chain upstream. Preserve each source installation and production process, quantity and emissions basis rather than blending them without the applicable method. The relevant detail pages explain which supplier questions are most useful in each sector; the hub only shows that the chain exists across sectors.

Label every value as official default, supplier-reported, actual emissions, mixed, unavailable or under review, with unit, period and version. Evidence collection and accredited verification stay distinct. A shared data model can be consistent across sectors without pretending that the same factor, boundary or document applies to every product.

How does the electricity data chain differ?

Electricity starts from the current Article 7(3) official-default rule and moves to an actual-emissions route only where the point 5 Annex IV criteria are demonstrated. It needs commercial, technical, flow, installation and verification evidence connected to the import period.

Flag this distinction before collecting electricity evidence, then use the electricity preparation route for the full criteria. Do not use a renewable label, supplier statement or power-purchase agreement as a shortcut. Commission Implementing Regulation (EU) 2025/2621 remains the binding definitive-default source, while the Commission workbook is information only.

If actual emissions are being explored, identify the producing installation, operator, reporting period, contracted and imported quantities, calculation record and relevant technical and market evidence. Keep the workstream labelled under review until the appropriate criteria assessment and accredited verification occur through the proper actors.

Keep COM(2025)989 in a separate proposal-only watch state. It proposes electricity methodology changes but is not law. Check the source-led electricity explanation before changing any current-rule workflow.

How does the hydrogen data chain differ?

Hydrogen preparation places extra emphasis on the producing operator, installation, production method, energy and feedstock context, reporting period, data boundary and supporting evidence. No unsupported factor should be inferred from a production label.

The commercial supplier may be a trader rather than the producer. Preserve that intermediary and trace the producing installation separately. Ask whether the value is installation-specific, process-specific, product-specific or a wider corporate average. Keep original units, denominator and reporting period.

Production labels can help organise follow-up, but they do not establish a CBAM emissions value. A hydrogen importer should request the method, data and evidence tied to the producing installation rather than use generic intensities or compare production routes with invented factors.

Hydrogen is also excluded from the Article 2a de-minimis exemption. A reader who arrives through a threshold query needs a clear exception route to the hydrogen page, not a zero result or a mass-based exemption message.

How should a mixed-sector importer structure its goods register?

Use one stable goods register with row-level sector, scope source, threshold treatment and data-chain links, then create views by entity, calendar year and sector. Do not merge unlike quantities or evidence into a single portfolio total.

Core fields include importing legal entity, import reference and period, CN code, commercial description, current scope-review state, sector, origin, supplier, net mass or other relevant quantity and unit, and record owner. Keep the source and review date attached to the scope state. A product name alone is not enough to preserve why a row entered a sector view.

Add a threshold-treatment field with factual values: mass-based journey, excluded from de-minimis exemption, or unresolved goods context. For the mass-based sectors, retain annual covered-goods net mass by entity. For electricity and hydrogen, keep the exclusion visible and do not turn a generic tonnes filter into a missing record.

Link, rather than duplicate, the supplier and emissions record. One supplier may serve several goods or sectors, but each value still needs a clear installation, process, goods and period scope. Shared documents can be referenced from several rows only where their actual scope supports that link.

• Entity, import reference, period and owner.
• CN code, description, sector and current source reference.
• Quantity, unit and threshold treatment.
• Supplier, operator, installation and production process.
• Emissions basis, evidence link, verification status and open gaps.

How do you route common questions to the right page?

Route scope questions to the goods checker and sector page, mass questions to the threshold guide and checker, supplier-data questions to the sector detail and evidence guides, and current-change questions to the updates feed.

A user asking ‘Is my product covered?’ needs the exact CN-code journey, not a sector summary alone. A user asking ‘Which sector page should I read?’ needs the six-way comparison. A user asking about annual covered-goods mass needs the threshold surface after scope is checked. A user asking why electricity differs needs the electricity detail page.

Route supplier questions by specificity. Use the supplier-data and verification guidance for general evidence structure, and use the relevant sector record for installation, process and precursor questions. Choose the narrowest route that matches the unresolved question.

Questions about current changes go to source-linked updates. Proposal-stage downstream expansion must remain separate from current Annex I coverage. A proposed product list should never be inserted into the current six-sector cards before adopted text is reviewed and effective.

What should sector comparison never imply?

A sector card or comparison should never imply that a product is classified, an importer is exempt, a supplier figure is accepted, actual emissions are verified, or a final certificate amount is known.

The hub can describe the current Annex I shape and direct readers to a reviewed goods checker. It cannot infer the correct customs code from a commercial name. It can flag which sectors are excluded from the mass-based exemption, but it cannot determine all obligations for a particular importer.

The hub can explain that sector data chains differ and that actual emissions require supporting records and, where used in a declaration, accredited verification. It cannot score a supplier as ready, approve a calculation or turn a completed evidence checklist into a verifier opinion.

The hub can point to officially published prices and planning tools, but it should not present a sector average, unsupported emissions factor, final liability or certificate order. These boundaries keep the comparison useful while preserving the detail and judgement that belong elsewhere.

What does a practical sector-triage review look like?

Review unassigned goods, mixed-sector rows, threshold exceptions, missing supplier links and stale source states. The goal is to route each record to the right next page and owner, not to complete every sector analysis in one meeting.

Start with goods rows lacking a reviewed CN-code and sector source. Assign the goods-check follow-up and leave the sector unresolved rather than guessing. Next, inspect rows where a broad chapter, printed exclusion or ‘ex’ entry may require careful matching. Route those to the relevant detailed source review.

Check threshold treatment. Confirm that cement, iron and steel, aluminium and fertilisers feed the covered-goods mass journey only after scope review. Confirm that electricity and hydrogen remain visible but outside the de-minimis exemption result. Keep legal entities and calendar periods separate.

Finally, check whether each in-scope preparation row has a supplier, producing installation or an explicit gap, an emissions-basis state, evidence owner and next review date. Send sector-specific questions to the detail page and qualified-review route. Record the triage outcome as navigation and ownership, not as a legal or customs conclusion.

Questions about the six CBAM sectors