CSRD vs IFRS S2 — Carbon Reporting Compared

Two major climate disclosure regimes, one underlying dataset. Here is how CSRD (ESRS E1) and IFRS S2 differ on scope, materiality, assurance, and filing format — and how to report under both without duplicating work.

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CSRD and IFRS S2 are the two most consequential climate disclosure frameworks of the next five years. They overlap on Scope 1/2/3 emissions disclosure but diverge on materiality, narrative expectations, assurance rigor, and machine-readable filing format.

Head-to-head

DimensionCSRD / ESRS E1IFRS S2
Issuing bodyEuropean UnionIFRS Foundation / ISSB
JurisdictionEU + non-EU with EU opsUK, Canada, Singapore, Australia, and more adopting
MaterialityDouble (financial + impact)Financial only
Scope 1 & 2RequiredRequired
Scope 3All material categoriesAll material categories
Scope 2 methodsLocation + market requiredLocation + market required
Scenario analysisRequired with transition planRequired with transition plan
AssuranceLimited -> reasonable (phased)Jurisdiction-dependent
Filing formatXBRL (ESRS taxonomy)ISSB taxonomy (emerging)
First reporting waveFY2024 (largest EU PIEs)FY2024/2025 depending on jurisdiction

How OffGridFlow handles both

  • Import activity data once (CSV, cloud connectors, SAP, utility APIs)
  • Calculate Scope 1/2/3 using GHG Protocol methodology — same engine for both frameworks
  • Lock a factor snapshot per reporting period for CSRD and IFRS S2 reproducibility
  • Export CSRD draft (PDF + ESRS XBRL)
  • Export IFRS S2 draft (PDF + ISSB taxonomy where applicable)
  • Single assurance evidence pack serves both engagements

Related: CSRD reporting software · IFRS S2 reporting software

Frequently Asked Questions

Do I have to report under both CSRD and IFRS S2?

Often yes. A multinational with EU operations above CSRD thresholds and securities listed in an IFRS S2 jurisdiction (UK, Canada, Singapore, etc.) reports under both. The underlying Scope 1/2/3 data is the same; the packaging differs.

What is the biggest functional difference?

Materiality. CSRD requires double materiality (financial + impact on people and environment). IFRS S2 requires financial materiality only. This affects what Scope 3 categories you must disclose and how narrative context is framed.

Which is stricter on assurance?

CSRD mandates assurance explicitly, moving from limited to reasonable over time. IFRS S2 defers to the adopting jurisdiction — some require assurance, some do not yet. Expect assurance for both as adoption matures.

Does OffGridFlow produce both outputs from one dataset?

Yes. Activity data is imported once; calculations run once. CSRD export uses ESRS XBRL; IFRS S2 export uses the ISSB taxonomy where applicable. One audit trail, two drafts.

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OffGridFlow calculates emissions using documented GHG Protocol methodology. Reports are drafts; customers are responsible for verification before regulatory submission.