Prepare your CBAM quarterly reports with structured, traceable data.
CBAM HUB helps EU importers organise the supplier data, embedded emissions calculations and documentation needed to prepare mandatory CBAM quarterly reports — reducing manual effort, improving completeness, and supporting audit readiness.
Supporting EU importers of steel, aluminium, cement, fertilizers, chemicals, hydrogen and electricity.
What a CBAM quarterly report must include
Under the CBAM Implementing Regulation, quarterly reports submitted to the EU CBAM registry must include a structured set of data for each import — covering the goods imported, their embedded emissions, the production facility, the calculation methodology applied, and the supporting evidence. Incomplete or inaccurate reports can be flagged for review.
Import-level declaration data
For each CBAM-covered import: the goods category by CN code, country of origin, quantity imported in the reporting quarter, and the relevant customs declaration references.
Embedded emissions per tonne
The specific embedded emissions (direct and, where applicable, indirect) expressed per tonne of goods — collected from the non-EU production installation or derived using default values where actual data is unavailable.
Installation and production route data
Information on the non-EU production installation — including installation identifiers and the production route applied — which determines the applicable emission calculation approach under CBAM regulation.
Supporting documentation
Evidence files supporting the declared embedded emissions — supplier declarations, production data, test reports, or other documentation demonstrating the basis for the emissions figures reported.
From fragmented data to a report-ready package
Supplier data collection by quarter
Organise embedded emissions data requests to non-EU suppliers by reporting quarter — tracking which suppliers have responded, which data is pending, and which entries still need validation before the reporting deadline.
Data completeness tracking
Monitor the completeness of your CBAM quarterly report data in real time — with clear visibility of which import entries have complete data, which are missing information, and what actions are needed before submission.
Calculation review and validation
Review embedded emissions calculations against the collected supplier data — applying regulation-aligned logic, flagging inconsistencies, and ensuring each figure is documented before it is included in the quarterly report.
Audit-ready documentation package
Generate a structured documentation package for each quarterly report — linking every declared figure to its supporting evidence and calculation notes, ready for internal review and regulatory audit.
XML-ready data export
Export structured CBAM quarterly report data in a format ready for XML file generation aligned with EU registry requirements — reducing manual formatting effort and improving consistency across reporting periods.
Period-by-period consistency
Maintain consistent methodology, data sources and documentation standards across quarterly reporting periods — making it easier to identify and explain changes between periods to auditors and regulators.
Start your CBAM quarterly report preparation early
CBAM quarterly reports are due within one month of the end of each calendar quarter. Preparing data in advance — rather than in the final days before submission — reduces errors and avoids last-minute gaps from unresponsive suppliers.
Weeks 1–2 of the quarter: set up and request
Confirm the CBAM-covered goods imported in the previous quarter. Identify any new suppliers or CN codes. Issue structured data requests to non-EU suppliers for the relevant quarter's production data.
Weeks 3–5: collect and validate
Follow up with suppliers on outstanding data. Validate incoming emissions data against CBAM requirements. Flag entries where default values may be needed due to missing actual data. Attach supporting documentation.
Weeks 6–8: calculate and document
Apply CBAM-aligned calculation logic to validated supplier data. Review all calculations for consistency and completeness. Compile the quarterly report documentation package with evidence files attached.
Final week: internal review and submission preparation
Conduct internal review of the completed quarterly report data. Export structured data and XML-ready files. Submit the quarterly report to the EU CBAM registry before the deadline in coordination with your qualified advisors.
Mistakes that create CBAM reporting risk
Many CBAM reporting errors are avoidable with a structured data preparation process. CBAM HUB helps address the most common issues before they affect your quarterly report.
Missing installation-level data
Embedded emissions declared at a company level rather than at the production installation level — not aligned with CBAM reporting requirements.
CBAM HUB structures data requests at installation level, aligned with the regulation.
Undocumented default value usage
Using EU default emission values without documenting why actual supplier data was unavailable — leaving the decision without a recorded justification.
CBAM HUB tracks and documents reasons for default value usage per entry.
Inconsistent emission factors
Different emission factors applied to the same product type across quarters or suppliers, making cross-period comparison and audit defence difficult.
CBAM HUB maintains consistent calculation methodology across periods.
Missing CN code mapping
Imports not correctly mapped to their CN codes — which determines the applicable CBAM calculation approach and whether goods are within scope at all.
CBAM HUB includes CN code mapping as part of the data structure.
No supporting evidence attached
Calculations submitted without the underlying supplier declarations, test reports or production data that would be needed to verify the declared figures.
CBAM HUB links evidence files to each calculation entry.
Late data from suppliers
Supplier data arriving too close to the reporting deadline — leaving insufficient time to validate, calculate and review before submission is due.
CBAM HUB enables early, systematic supplier data requests with completeness tracking.
Explore the full CBAM HUB platform
Discuss your CBAM quarterly reporting process
Tell us about your import portfolio and where your quarterly reporting process currently stands. Our team will follow up to discuss how CBAM HUB can help you prepare structured, complete and audit-ready quarterly reports.
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