CSRD Taxonomy Article 8 KPI disclosures

Article 8 of the EU Taxonomy Regulation requires undertakings that publish sustainability information under Articles 19a or 29a of the Accounting Directive to explain how and to what extent their activities are associated with environmentally sustainable economic activities. Commission Delegated Regulation (EU) 2021/2178 specifies the content, presentation, KPI methodology, and templates for those disclosures.

ESRS reporting and Article 8 reporting therefore need one reporting calendar and one evidence model, but they are not the same calculation. ESRS starts from material impacts, risks, and opportunities. Article 8 starts from Taxonomy-eligible and Taxonomy-aligned economic activities, the undertaking type, and the KPI templates in the Disclosures Delegated Act.

For non-financial undertakings, the Article 8 KPI pack is built around turnover, capital expenditure, and operating expenditure. Turnover compares Taxonomy-aligned net turnover with total net turnover. CapEx and OpEx compare the Taxonomy-aligned portion of the relevant expenditure base with the full denominator defined in the Disclosures Delegated Act.

The template control should not stop at the final percentage. A defensible table traces each economic activity to its code, absolute amount, proportion, environmental objective, substantial contribution assessment, DNSH assessment, minimum safeguards conclusion, current-year and prior-year aligned percentages, and any enabling or transitional category.

Treat the Article 8 disclosure as a data product before it becomes narrative in the sustainability statement. The control file should contain a row per economic activity and per KPI population, with a stable link to the accounting source, Taxonomy activity screening file, environmental objective, DNSH evidence, minimum safeguards assessment, calculation owner, and reviewer sign-off.

For group reporting, the file should preserve consolidation logic and avoid mixing entity-level eligibility screening with group-level KPI denominators. For financial undertakings, counterparty KPI inputs should be stored with source year, whether the data came from mandatory Article 8 reporting or another allowed basis, and the weighting method used in the relevant KPI.

EFRAG's Article 8 XBRL Taxonomy transposes the Disclosures Delegated Act into machine-readable format. It is digital and technical support to the European Commission; it does not change the legal content of Article 8 disclosures. ESMA is responsible for authoritative tagging rules through the ESEF process.

Digital readiness should therefore focus on traceability. The published table, the calculation workbook, and the future tagged fact should all point to the same activity, amount, unit, period, objective, and dimensional breakdown. The Article 8 taxonomy is closed, so teams should avoid designing entity-specific extension concepts for Article 8 fields.

Article 8 KPI evidence should be ready for the same assurance discipline as the sustainability statement. The reviewer needs to reperform the route from source data to eligibility, alignment, denominator, numerator, template cell, narrative explanation, and tagged fact without relying on undocumented management judgment.

The strongest control is a single evidence index that joins finance, sustainability, legal, and reporting-system owners. It should distinguish binding source requirements from EFRAG technical support, management estimates from source data, and ESRS narrative from Article 8 calculation outputs.