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CBAM data checklist for suppliers: what to collect and where to find it
A non-EU steel or aluminium producer needs 11 items to answer a CBAM data request: CN codes, installation identity, one calendar year of production, fuels, carbonates and electrodes, purchased material with the supplier's verified value, electricity, exported tonnes, a monitoring plan and the evidence behind each number.
Print this page, tick each line, and you have everything the calculator and a verifier will ask for.
| What | Where to find it | Detail |
|---|---|---|
| CN code of each product | Export invoice or customs declaration | 8 digits — check it on the CN code page |
| Installation identity | Company records; UN/LOCODE from the UNECE list | Name, address, UN/LOCODE or coordinates |
| Reporting period | — | Calendar year, 1 January to 31 December — not your fiscal year |
| Production per process | Production records or ERP | Tonnes of saleable output |
| Fuels burned | Supplier invoices and meter readings | Gas bills often show m³ or kWh — ask your supplier for the conversion; the calculator takes tonnes |
| Carbonates and electrodes | Purchase invoices and stock records | Tonnes consumed in the year |
| Purchased steel or aluminium | Purchase invoices | Tonnes, CN code, country of production, and the supplier's verified value — ask with this email |
| Electricity | Electricity bills | MWh — reported in the template, not counted for steel and aluminium |
| Tonnes exported to each EU customer | Sales records | Per CN code, for the buyer report |
| Monitoring plan | You write it | In English: sources, methods and meters — the first document a verifier asks for |
| Evidence | Your files | Keep the invoices and meter logs behind every number; the verifier will sample them |
Timing
Use one calendar year. Plan the verifier early: reports on 2026 data can be issued from 2027, and your EU customer's first annual declaration is due by 30 September 2027. Until your figures are verified, call them verification-ready, not verified.
Questions exporters ask
Does my CBAM data need to be verified?
Yes — from 2026 actual emission values can only be used by the importer once they have been verified by an accredited verifier; until then, describe your figures as verification-ready, not verified.
A first calculated file is still useful: it shows your customer the likely saving and is the input the verifier checks.
Source: Regulation (EU) 2023/956, Article 8; Commission Guidance No. 3, p. 50
Which period of data do I report for CBAM?
A full calendar year, 1 January to 31 December — not your fiscal year — for one installation, meaning one physical production site.
A company with two factories sends two separate sets of data.
Source: Commission Guidance No. 3, pp. 9, 18
Where do I find the CN code of my product?
Use the tariff code on your export invoice or on your customer's EU import declaration; the first six digits are the international HS code, so the code you already use for customs in your own country matches the CBAM list up to that level.
The Combined Nomenclature adds two EU-specific digits to the six-digit HS code. CBAM lists some goods at four digits (e.g. 7308), some at six and some at eight, so check the longest part of your code that appears on the list.
Source: Council Regulation (EEC) No 2658/87 (Combined Nomenclature); Regulation (EU) 2023/956, Annex I
Last updated 2026-10-05.
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