CSRD (Corporate Sustainability Reporting Directive)

CSRD, the Corporate Sustainability Reporting Directive, is the EU framework that expands sustainability reporting from a short narrative section into a structured, standardized disclosure obligation. It widens the set of companies in scope well beyond the earlier non-financial reporting regime and specifies what has to be reported rather than leaving the choice to the preparer.

What CSRD requires

Reporting follows the European Sustainability Reporting Standards, which cover environmental, social, and governance topics with defined data points. The scoping mechanism is double materiality: a company assesses both how sustainability matters affect its business and how its business affects people and the environment, and reports on the topics that clear either test. That assessment drives which standards apply, so two companies of similar size can end up with meaningfully different disclosure sets.

Two features move CSRD out of the communications department. First, the disclosures sit in the management report alongside the financial statements rather than in a separate glossy publication. Second, they are subject to assurance, which means an external party tests the numbers and the process behind them. Application is phased by company size and other criteria, with the largest undertakings reporting first and smaller ones brought in later. The directive is implemented through national law, so the exact timing and scope in any one member state depends on how that state transposed it.

Why the data is the hard part

Financial figures come from a ledger with a defined chart of accounts and a close process. Sustainability figures come from everywhere else: energy invoices, HR systems, procurement records, supplier questionnaires, spreadsheets maintained by one person in a plant. There is often no single system of record, no period lock, and no reconciliation step. When an assurance provider asks where a figure came from, the honest answer is frequently a spreadsheet nobody can reproduce.

The fix is not a new reporting tool. It is applying the same discipline financial data already gets: a named source per figure, a documented calculation, a version that does not change after the period closes, and an audit trail that survives a question asked six months later.

How Rexfin handles it

Rexfin reconciles sources into one governed model, cites every figure to the document or system it came from, runs calculations deterministically, and scopes access by role. That is the same lineage discipline CSRD assurance expects, applied to reported figures generally rather than to financial statements alone. It works the same way for statutory reporting and for structured filing formats like XBRL.