CSRD 2025: A Finance Director's Survival Guide

The Corporate Sustainability Reporting Directive (CSRD) represents the most significant expansion of corporate reporting obligations in a generation. For Finance Directors, it arrives at an already demanding time — but understanding its scope, timeline, and practical implications now is far better than scrambling at the deadline.

Who is in scope and when

CSRD is being phased in across four waves:

• Wave 1 (FY2024, reporting in 2025): Large public-interest entities already subject to the Non-Financial Reporting Directive (NFRD) — approximately 11,700 companies across the EU
• Wave 2 (FY2025, reporting in 2026): All large EU companies not previously in scope — those meeting two of three criteria: 250+ employees, €40M+ turnover, €20M+ total assets
• Wave 3 (FY2026, reporting in 2027): Listed SMEs, small and non-complex credit institutions, and captive insurance undertakings
• Wave 4 (FY2028, reporting in 2029): Non-EU companies with EU turnover above €150M

UK companies with EU subsidiaries or listings are directly caught by waves 1–3 via their EU entities. UK groups with EU turnover above €150M will be caught by wave 4 regardless of where they are incorporated.

What CSRD requires you to report

CSRD mandates reporting against the European Sustainability Reporting Standards (ESRS), which cover environmental, social, and governance topics. For most Finance Directors, the immediate focus is on climate-related disclosures under ESRS E1, which requires:

• Gross Scope 1, 2 and 3 GHG emissions, broken down by category
• A transition plan aligned with a 1.5°C pathway
• Climate-related financial risks and opportunities (aligned with TCFD)
• Targets and progress against those targets

Critically, Scope 3 emissions are mandatory from the first reporting year for Wave 1 companies, and from Wave 2 onwards for others — with a one-year phase-in available only for specific hard-to-measure categories.

The double materiality assessment

One of CSRD's more demanding requirements is the double materiality assessment: companies must assess which ESG topics are material from both an impact perspective (how the company affects the world) and a financial perspective (how ESG factors affect the company's finances). This assessment must be documented, disclosed, and updated regularly.

For Finance Directors, this creates a new governance obligation: the double materiality assessment should involve the CFO and must be signed off at board level.

Assurance requirements

Unlike previous voluntary ESG reporting, CSRD-compliant reports must be independently assured — initially at a limited assurance level, with reasonable assurance required from 2028 onwards. This means your sustainability data needs to meet the same standards of accuracy, completeness and auditability as your financial data.

Practically, this requires:

• A documented data collection methodology for each reported metric
• Clear audit trails linking reported figures back to source data
• Internal controls over sustainability reporting equivalent to financial controls
• An external assurance provider engaged well in advance of reporting deadlines

What to do right now

If you haven't already started, here's a practical sequence:

1. Determine your wave: Confirm whether your group is in scope and from which reporting year, taking into account both direct EU entity obligations and the parent-level consolidation requirements
2. Complete a double materiality assessment: This is the foundation of your ESRS reporting and determines which standards apply to you
3. Build a GHG inventory: Start with Scope 1 and 2 (your own operations and purchased energy), then tackle Scope 3 by category — purchased goods and services (Category 1) is typically the largest and most data-intensive
4. Automate data collection: Manual spreadsheet processes won't scale to the auditability requirements. Connect your ERP, integrate your utility providers, and establish automated data flows
5. Engage your auditor early: Your financial auditor may also be your sustainability assurance provider — have the conversation now about their capabilities and timelines

The UK angle

The UK has its own sustainability disclosure trajectory via the UK Sustainability Disclosure Standards (UK SDS), which are expected to be broadly aligned with IFRS S1 and S2. UK-listed companies are already subject to TCFD-aligned reporting, and UK SDS mandatory requirements are expected to take effect for large listed companies from 2026.

Finance Directors managing both UK and EU entities will need to navigate both frameworks — but given their alignment, a single robust GHG inventory and data infrastructure will serve both.