ESRS — European Sustainability Reporting Standards

What it is

ESRS is the body of standards developed by EFRAG to operationalise the Corporate Sustainability Reporting Directive (CSRD). It covers the methodology and content of CSRD disclosures. There are twelve standards in scope: two cross-cutting — ESRS 1 (general principles) and ESRS 2 (general disclosures) — and ten topical: E1 (climate), E2 (pollution), E3 (water and marine resources), E4 (biodiversity and ecosystems), E5 (resource use and circular economy), S1 (own workforce), S2 (workers in the value chain), S3 (affected communities), S4 (consumers and end-users), and G1 (business conduct). Companies in scope produce disclosures only on standards material to them, determined by double materiality.

Why it matters

ESRS is the most prescriptive sustainability standard set ever issued. It defines what assurance providers test, what data points must be produced, and what evidence is needed for each. Companies that previously produced narrative sustainability reports now have to produce structured, granular, auditable data — the same level of rigour applied to financial reporting since the 1930s. The complexity scales fast: a company with operations across E1, E5, S1, and G1 produces several hundred individual data points per cycle, each tied to source data.

How Norrsent handles it

Norrsent's CSRD module ships the ESRS topical structure as the data model. Each disclosure is anchored to its source system (ERP, energy management, HRIS, supplier portals), with full data lineage. Assurance-grade evidence — system, timestamp, owner — is captured per data point. Cycle two reuses cycle one's lineage; the data model doesn't reset.

Common questions

Are the topical standards mandatory?

Only the ones material to your company. Double materiality determines scope. ESRS 2 is mandatory for everyone in scope of CSRD; the topical standards apply where the corresponding topic is material under double materiality.

How does ESRS interact with ISSB?

ESRS and ISSB (S1, S2) overlap on climate but differ on social, governance, and the materiality lens. Companies reporting against both produce mappings — same underlying data, different framings. Norrsent's data model anchors to operational source data, so the framing layer (ESRS, ISSB, GRI) is rendered, not duplicated.

What does 'value chain' coverage actually require?

Disclosures often extend up and down the value chain. For E1 (climate), Scope 3 emissions reach into suppliers. For S2 (workers in value chain), labour conditions reach into supplier payroll. ESRS expects the data be sourced where it's most reliable; companies fill gaps with industry averages or estimates, but the gap and the method must be disclosed.