Question 1

How many suppliers does a typical CBAM declaration involve?

Accepted Answer

Most EU importers are not sourcing a single good from a single installation. A typical annual CBAM declaration draws embedded-emissions evidence from several non-EU suppliers at once, commonly in the range of 5 to 20 installations, often spanning more than one sector and origin country. Each one must provide schema-valid data, and every one sits on the critical path of the same declaration. The coordination load scales with the number of suppliers, not with the size of any single shipment.

Question 2

Why does one missing supplier file hold up the whole declaration?

Accepted Answer

A CBAM declaration is filed as a single set covering all in-scope goods for the period. Until every relevant installation has supplied embedded-emissions data that validates against the EU CBAM schema, the set is incomplete. One rejected, late or non-conforming XML (anywhere among the suppliers) blocks the declaration just as effectively as twenty would. That is why the work is coordination, not calculation: chasing, checking and reconciling many files to a single schema, on one deadline.

Question 3

What does it cost when suppliers cannot evidence actual emissions?

Accepted Answer

For any supplier that cannot evidence actual emissions, the declaration falls back to default values, which carry a markup: +10% in 2026 under the standard schedule of Regulation (EU) 2025/2621, rising to 20% and 30% in later years (fertilisers are the sole reduced exception). The uplift is applied to the declared embedded factor on every tonne where actual data is missing, and is surrendered in CBAM certificates, so the more suppliers that fall back to defaults, the higher the bill. Collecting actual supplier data removes the markup.

Question 4

Does Carbon Mandate file my CBAM declaration with the EU Registry?

Accepted Answer

No. Carbon Mandate is a preparer, not a filer. We run the supplier pipeline, check every incoming XML against the EU CBAM schema, and hand your filing team an audit-ready evidence pack. You remain the declarant of record and file with the EU CBAM Registry yourself. We are never the verifier.

Multiple suppliers, multiple sectors: one declaration pipeline.

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