CSRD Deadlines 2025–2028: Which Phase Applies to Your Company

The Corporate Sustainability Reporting Directive is not a single deadline. It is a phased rollout that brings different types of companies into scope over four years — and the requirements expand at each stage. If you are a board member, CEO, or sustainability leader at an EU company, the first question is not "what do I need to report?" but "when does my obligation begin?"

Getting this wrong has consequences. Late or non-compliant CSRD filings expose the company to regulatory sanctions, qualified audit opinions, and investor concern. Getting it right early creates a structural advantage: you build the data infrastructure once and refine it over subsequent periods, rather than scrambling under deadline pressure.

The Four Phases

Phase 1 — FY2024 (reports due in 2025)

Who: Companies already subject to the Non-Financial Reporting Directive (NFRD) — large EU public-interest entities with 500+ employees.

What changed: These companies transitioned from NFRD to ESRS. If you were reporting under NFRD, the framework shift is substantial: ESRS requires structured data, double materiality assessment, and disclosure across up to 10 topical standards — compared to the narrative-focused NFRD approach.

Status: If you are in Phase 1, your first ESRS-compliant report was due in 2025. You should now be in your second reporting cycle, refining data quality and closing first-year gaps.

Phase 2 — FY2025 (reports due in 2026)

Who: All large EU companies meeting two of three criteria:

  • 250+ employees
  • €50M+ net turnover
  • €25M+ total assets

This is the broadest expansion. Phase 2 brings thousands of companies into scope that have never been required to produce structured sustainability disclosures. Many are mid-market industrial companies, family-owned enterprises, and national-champion businesses that treated ESG as voluntary until now.

Key challenge: These companies typically have limited sustainability infrastructure — no dedicated reporting tools, no established data collection processes for GHG emissions, and no experience with double materiality assessments. The gap between "awareness" and "compliance-ready" is significant.

If you are in Phase 2, your FY2025 data reporting period has already started. Your ESRS-compliant report is due in 2026 alongside your annual financial statements.

Phase 3 — FY2026 (reports due in 2027)

Who: Listed SMEs (small and medium-sized enterprises listed on EU-regulated markets), and small and non-complex credit institutions.

Simplified standards: Listed SMEs can use LSME-ESRS (voluntary simplified standards) instead of the full ESRS set. This reduces the reporting burden, but still requires structured data and a materiality-driven approach.

Opt-out option: Listed SMEs may opt out for up to two additional years (until FY2028), after which compliance becomes mandatory.

Phase 4 — FY2028 (reports due in 2029)

Who: Non-EU companies with significant EU operations — specifically, those with net turnover exceeding €150M in the EU and at least one EU subsidiary or branch meeting size thresholds.

Import: This extends CSRD to major non-European multinationals. US, UK, Swiss, Japanese, and other headquartered companies with substantial EU revenue will need to produce consolidated sustainability reports under ESRS.

What "Compliance" Actually Means

Meeting a CSRD deadline is not simply publishing a sustainability section in your annual report. It requires:

1. Double Materiality Assessment A formal, documented process evaluating impact materiality (your effects on people and environment) and financial materiality (how sustainability issues affect your business). This determines which of the 10 ESRS topical standards — E1 through E5 (environment), S1 through S4 (social), G1 (governance) — are material to your company and therefore require disclosure.

2. ESRS Data Collection Quantitative and qualitative data across every material standard. This is not narrative reporting. ESRS defines specific datapoints: GHG emissions by scope, energy consumption by source, workforce metrics by gender and contract type, water withdrawal by source, waste by disposal method. Each datapoint must be traceable and audit-ready.

3. GHG Accounting (Scopes 1, 2, and 3) Climate-related disclosures under ESRS E1 require a full GHG inventory following the GHG Protocol Corporate Standard. This includes all three scopes, with Scope 3 requiring screening of all 15 value chain categories. For most companies, Scope 3 is the most resource-intensive part of the process.

4. External Assurance CSRD mandates limited assurance from an independent auditor under ISAE 3000 (or equivalent national standards). This means your data must withstand third-party verification — complete audit trails, documented methodologies, and evidence-backed figures.

5. Digital Filing CSRD reports must be filed in iXBRL/ESEF format for companies subject to EU electronic reporting requirements. This is a structured digital format — not a PDF upload.

The Cost of Waiting

A common pattern among Phase 2 companies is deferring preparation until the reporting year has started, then discovering that:

  • Scope 3 supplier data collection takes 3–6 months to yield adequate responses
  • Double materiality assessments require stakeholder engagement that cannot be compressed into weeks
  • The data infrastructure needed for ESRS-compliant reporting does not exist and cannot be built retroactively
  • Auditors need access to systems, methodologies, and evidence trails before the engagement — not after the report is drafted

The companies that handle CSRD compliance efficiently typically start preparation 6–12 months before the reporting period begins. For Phase 2 companies reporting on FY2025, that window is already closed — the question now is how to accelerate.

What to Do Right Now

If you are in Phase 2 (FY2025, due 2026):

  • You are in the reporting period now. Prioritise getting your GHG accounting infrastructure operational — Scopes 1, 2, and a spend-based Scope 3 baseline
  • Conduct (or finalise) your double materiality assessment to define which ESRS standards apply
  • Engage your external auditor on expectations for limited assurance
  • Set up a structured data collection system with full audit trails — manual processes will not survive assurance

If you are in Phase 3 (FY2026, due 2027):

  • You have the advantage of time but not as much as it feels. Start your double materiality assessment this year
  • Evaluate whether you will use LSME-ESRS or full ESRS standards
  • Begin Scope 1 and 2 data collection immediately as a dry run

If you are in Phase 4 (FY2028, due 2029):

  • Identify which EU subsidiaries or branches trigger the threshold
  • Map your existing sustainability reporting (GRI, TCFD, ISSB, SEC Climate Rule) to ESRS requirements — significant overlap exists but gaps are real
  • Begin socialising the requirement with your board, since ESRS reporting will require governance-level disclosures on sustainability oversight

A Note on Multi-Framework Reporting

CSRD does not exist in isolation. Most companies subject to ESRS also report to CDP (investor-requested), follow GRI (stakeholder reporting), align with ISSB IFRS S1/S2 (financial market standards), and assess EU Taxonomy alignment (regulatory classification). Some face additional jurisdictional requirements: SEC Climate Rule (US), California SB 253 (US), SEBI BRSR (India).

The strategic implication is clear: your reporting infrastructure should not be framework-specific. A platform that natively supports multiple frameworks using shared underlying data eliminates the duplication, inconsistency, and reconciliation effort that comes from managing each framework in a separate tool or spreadsheet.

Emistra supports 11 frameworks natively — ESRS, GRI, TCFD, ISSB, CDP, EU Taxonomy, SASB, SEC Climate Rule, California SB 253, SEBI BRSR, and GHG Protocol — across 23 report templates with iXBRL/ESEF export, full audit trails, and a dedicated auditor portal for ISAE 3000 limited assurance. Get started →