CSRD Readiness Spain: Energy Group Case Study | BMC

Client Background

An energy group with €150 million in revenue and 500 employees operating across three Spanish regions had built a strong operational track record in renewable energy generation and distribution over the prior decade. The company’s leadership understood that the energy transition was reshaping the expectations of its clients, financiers, and regulators simultaneously — but translating that understanding into a structured reporting framework had always been deferred in favour of operational priorities.

The arrival of the Corporate Sustainability Reporting Directive as a hard compliance obligation changed that calculus. Two financing institutions had conditioned the renewal of credit facilities on the presentation of verifiable ESG data. Several corporate clients had begun including sustainability reporting requirements in their supply contracts, with explicit references to Scope 3 emissions data. And the first mandatory CSRD reporting deadline for companies of the group’s size was approaching with twelve months of runway — which sounds comfortable until you account for the data collection, stakeholder consultation, and external assurance requirements that must be completed before the report is filed.

The Challenge

The company had never published a structured sustainability report. Its environmental data — energy consumption, waste generation, water use — was collected in departmental spreadsheets with no consistent methodology, no defined baselines, and no chain of custody that would survive external audit scrutiny. None of the 15 area managers who would need to own the data collection process had received training on ESG taxonomy or ESRS requirements. And the concept of double materiality — the foundational methodology that determines which ESRS disclosures are required — was entirely unfamiliar to the management team.

The risk was not merely regulatory. Getting CSRD-ready was simultaneously a compliance obligation, a financing prerequisite, and a commercial requirement for retaining key clients. Treating it as a box-checking exercise would satisfy none of these three objectives.

Our Approach

The project began with the double materiality assessment — the cornerstone of CSRD compliance that determines which standards and disclosures apply. BMC facilitated a structured consultation process with 28 stakeholder groups, including employees at different seniority levels, key customers, major suppliers, local communities in the areas where the group operates, and the two financing institutions that had conditioned their credit renewals on ESG data. The consultation process ran over four weeks and produced a documented record of stakeholder inputs that forms part of the CSRD disclosure itself.

The output was a double materiality matrix with 12 prioritised material topics, including energy transition strategy and climate risk, water management in water-stressed operating areas, supply chain labour practices, employee wellbeing and skills development, anti-corruption in public contract procurement, and board governance of sustainability matters. The matrix determined which ESRS topic standards applied: E1 (climate change), E3 (water), S1 (own workforce), and G1 (business conduct) as the priority standards, alongside the mandatory cross-cutting ESRS 1 and ESRS 2.

From that foundation, we designed the ESG data collection framework: 48 quantitative indicators aligned with the applicable ESRS standards, with defined data sources, capture frequency, departmental owners, and internal verification procedures for each indicator. We integrated the framework within a business management tool already in use at the company — avoiding the introduction of new software and the adoption friction that accompanies it.

In parallel, we developed and delivered a 12-hour training programme for the 15 area managers most involved in the reporting process, covering ESRS fundamentals, their specific reporting responsibilities, data quality criteria, and the external audit process they would need to support. We also prepared disclosure templates aligned with the narrative reporting requirements of each applicable ESRS, structured so that area managers could contribute their sections with guidance rather than starting from a blank page.

Results

Six months before the first mandatory filing deadline, the company had a documented and externally reviewed double materiality assessment, a functioning ESG data collection system with two years of historical data already loaded and validated, and a first draft sustainability report structured in accordance with ESRS and ready for external auditor review.

The early completion gave the team time to identify and close data gaps — particularly in Scope 3 emissions and supply chain labour practices — with sufficient runway to obtain the missing data before the final filing. For first-year CSRD reporters, these gaps are the most common cause of qualified audit opinions, and avoiding them required exactly the lead time the project’s advance planning provided.

Two of the financing institutions reviewed a draft of the sustainability statement and confirmed their intention to open new green credit lines contingent on the quality of the final report — a commercial outcome that directly recovered a meaningful portion of the project’s advisory cost.

Key Takeaways

CSRD is fundamentally a data governance project, not a sustainability communications project. Companies that approach it as the latter produce reports that fail external audit. Companies that approach it as the former — building the data infrastructure, training the data owners, and designing verification procedures before data collection begins — produce reports that hold up to scrutiny and generate the secondary benefits: financing access, client retention, and reputational positioning that the directive’s architects intended when they designed the double materiality framework.