Successfully delivering a Corporate Sustainability Reporting Directive (CSRD) project requires strict adherence to legal timelines. Because your sustainability statement must be published as a dedicated section within your annual management report, you cannot treat this as a flexible, standalone initiative.
To guarantee compliance, you must build your project schedule using a retroplanning (backward planning) methodology. This means identifying your immovable corporate publication date first, and scheduling all audit, data collection, and scoping phases in reverse.
1. The Anchor: Corporate Report Publication (Year N+1)
Your entire CSRD timeline is dictated by the date your company legally publishes its annual financial management report. You cannot delay this date, and your ESG data must be included within it.
Determine Your Deadline: Identify the exact month your Board of Directors approves and publishes the annual report for the preceding financial year (typically between March and June of Year N+1).
The Retroplanning Anchor: This publication date is "Day Zero" of your timeline. Every other milestone must be scheduled backward from this specific week.
2. The Audit and Assurance Phase (Early Year N+1)
Before your CSRD report can be published, it must undergo a mandatory "limited assurance" review by an independent, third-party auditor. Auditors operate on strict schedules during the financial closing season, meaning you must book their time well in advance and meet their exact data delivery deadlines.
Allocate Sufficient Time: The audit process typically takes 6 to 8 weeks. If your publication date is in April, your auditor must begin their review no later than February.
Lock the Data: By the time the audit begins, your data collection phase must be entirely closed. All datapoints in your Greenly workspace must display a "Validated" status, complete with attached supporting evidence and finalized justifications.
3. Data Collection and Consolidation (Year N to Early Year N+1)
This is the most resource-intensive phase of the project. Your operational teams must gather the exact metrics and narrative policies required by the European Sustainability Reporting Standards (ESRS) for the targeted financial year.
The Year-End Push (January - February Year N+1): The final quantitative metrics (like total annual energy consumption or final headcount) can only be collected after the financial year officially closes on December 31st. Your teams have a very short, 4-to-6-week window to input and internally validate this final data before handing it over to the auditor.
Continuous Collection (Throughout Year N): To prevent a bottleneck in January, Data Owners should collect qualitative data (policies, action plans, governance structures) and available rolling metrics continuously throughout the active financial year.
4. Framing and Double Materiality (Year N-1)
You cannot collect data if you do not know what you are legally required to report. The foundational scoping phases must be completed before the reporting financial year even begins.
Double Materiality Assessment (DMA): This mandatory assessment dictates your exact reporting scope. It takes 2 to 4 months to execute properly, as it requires surveying internal and external stakeholders.
Gap Analysis and Action Plans: Once the DMA identifies your material topics, you must assess your current readiness. If you are missing critical data tracking mechanisms (like a way to measure specific waste streams), you must implement those new processes before January 1st of the reporting year.
Tip: If your first mandatory CSRD reporting year is 2027 (for publication in 2028), your Double Materiality Assessment and Gap Analysis should ideally be finalized by Q3 or Q4 of 2026.
Summary: The Retroplanning Sequence
To visualize your schedule, here is a standard retroplanning sequence for a company whose financial year aligns with the calendar year (ending December 31st):
May (Year N+1): Official publication of the Annual Management Report (including the CSRD statement).
March – April (Year N+1): External Audit (Limited Assurance).
January – February (Year N+1): Final data collection, consolidation, and internal validation.
January – December (Year N): The active reporting year. Ongoing data collection for available metrics and policies.
September – December (Year N-1): Gap Analysis and implementation of new data-tracking processes.
June – September (Year N-1): Execution of the Double Materiality Assessment (DMA).