Why your buyer is asking
Since 1 January 2026, the EU charges importers a carbon price on steel, aluminium and some other goods. If your buyer doesn’t have your factory’s real data, they must use EU default values, which are set high and rise every year:
- +10 % on 2026 defaults
- +20 % on 2027 defaults
- +30 % on 2028 defaults and after
Sharing your actual data helps keep your buyer’s cost down — and keeps you their supplier.
What you’ll need to send
For each installation that produces the goods your buyer imports:
- Installation details. Name, address and the goods you produce.
- Production in tonnes per product for the calendar year, by CN code.
- Fuels used — type and quantity. Natural gas, coal, diesel, furnace oil, LPG.
- Electricity consumed (where it counts for your sector).
- Precursors — crude steel, billets, unwrought aluminium — with their origin and, where available, their emissions data.
You can photograph bills and production records; CBAMWorks reads the numbers and asks you to confirm each one.
The deadline
The first annual declaration is due 30 September 2027, covering goods imported into the EU during 2026. Suppliers typically send their data to buyers between January and June 2027.
Suppliers who want their data accepted as actual values (and not just as sense-checks) also need an EU-accredited verifier to review them. The first verification requires a site visit.
Where your data goes
Only to the EU buyers you choose to share it with. You can also download the Commission’s communication template and send it to any other EU buyer, without going through them one at a time.