The ESG (Environmental, Social and Governance) framework has evolved from an abstract concept of corporate responsibility into a complex regulatory system with specific legal obligations, defined deadlines, and sanctions for non-compliance. Spain, as an EU member state, is implementing what is arguably the world's most ambitious corporate sustainability reporting framework, led by the Corporate Sustainability Reporting Directive (CSRD, Directive 2022/2464).
The ESG regulatory architecture in Europe: the complete map
Understanding the ESG impact on Spanish companies requires a panoramic view of the regulatory environment, which is structured around five principal instruments:
1. CSRD — Mandatory reporting (Directive 2022/2464): requires large companies and listed companies to publish a sustainability report under the European Sustainability Reporting Standards (ESRS), externally verified and integrated into the management report. This is the most extensive and impactful element of the ESG package.
2. Taxonomy Regulation (EU 2020/852): defines which economic activities are “green” for the purposes of sustainability-related financial communications. Companies subject to the CSRD must report what percentage of their turnover, capital expenditure, and operating expenditure is “taxonomy-aligned.”
3. SFDR — Sustainable Finance Disclosure Regulation (EU 2019/2088): requires asset managers and financial advisers to classify their investment products by level of ESG integration (Article 6, 8, or 9). This does not directly affect non-financial companies, but determines whether investment funds can invest in them as “sustainable” assets under their own mandates.
4. CS3D — Corporate Sustainability Due Diligence Directive: subject to revision under the 2025 Omnibus Package, this directive establishes the obligation of large companies to identify, prevent, and remediate negative impacts on human rights and the environment in their value chains.
5. EU Green Bond Standard and sustainable financial product labelling: frameworks that determine whether a company’s financing instruments can be labelled as “green,” with direct implications for the cost of and access to capital.
The CSRD in detail: who, what, and when
Scope of application
The CSRD significantly expands the scope of the previous NFRD (Non-Financial Reporting Directive). While the NFRD required reporting from approximately 150 companies in Spain (public-interest entities with over 500 employees), the CSRD in full application will affect more than 5,000 companies in Spain.
The application criteria are: exceeding two of the three size thresholds (250 employees, €40 million net turnover, €20 million total balance sheet). Companies that exceed these thresholds for two consecutive financial years enter scope in the third year.
The roll-out calendar applies the obligation in waves:
- Wave 1 (reporting year 2024): companies already subject to the NFRD (public-interest entities with over 500 employees).
- Wave 2 (reporting year 2025): large companies exceeding the size thresholds.
- Wave 3 (reporting year 2026): listed SMEs (with opt-out available until 2028).
The ESRS: structure and logic
The European Sustainability Reporting Standards (ESRS) are the technical core of the system. Approved by Commission Delegated Regulation (EU) 2023/2772, they comprise:
ESRS 1 — General requirements: defines reporting principles (relevance, faithful representation, comparability, verifiability, understandability), the value chain perspective, and the double materiality process. Contains no specific data points.
ESRS 2 — General disclosures (mandatory for all): the only standard that applies to all companies without the possibility of omission on materiality grounds. Requires information on governance of sustainability reporting, sustainability strategy and targets, management of impacts, risks and opportunities, and the double materiality process.
ESRS E1 to E5 (Environmental): covering respectively climate change, pollution, water and marine resources, biodiversity and ecosystems, and resource use and circular economy.
ESRS S1 to S4 (Social): covering own workforce, value chain workers, affected communities, and consumers and end users.
ESRS G1 (Governance): business conduct, including anti-corruption, whistleblower protection, supplier relationships, and tax practices.
The double materiality principle: understanding it in depth
Double materiality is the most novel and influential concept in the CSRD framework. It requires companies to assess the materiality of sustainability topics from two simultaneous perspectives:
Impact perspective (inside-out): how do the company’s operations and value chain affect the outside world? Impacts may be positive (quality employment, emissions reductions through efficient products) or negative (CO2 emissions, impact on local communities, labour conditions in the supply chain).
Financial perspective (outside-in): how do sustainability factors affect the company’s financial position? Physical climate risks (flooding, drought, extreme temperatures), transition risks (carbon pricing, regulatory changes, shifts in consumer preferences), and opportunities (new markets, energy efficiency, sustainable new products) are the principal factors.
A topic is materially relevant if it meets either condition. The company must document the assessment process and findings for each topic on the ESRS list.
ESG governance: structuring the organisation
The CSRD does not merely require data reporting — it requires clear sustainability governance. The specific requirements of ESRS 2 on governance include:
Role of the Board of Directors: the Board must oversee the sustainability reporting process, approve ESG objectives and strategy, and receive regular information on progress. Responsibility for ESG reporting must be explicitly assigned to a Board member or committee.
Integration into remuneration: the CSRD introduces the expectation (though not the explicit obligation) that variable executive remuneration is linked to sustainability objectives, signalling the level of organisational commitment.
Internal competencies: the company must demonstrate that the persons responsible for ESG reporting have the necessary technical competencies, or that they access these through external advisers.
Taxonomy alignment: impact on access to finance
The EU Taxonomy directly affects companies’ access to sustainable finance. Companies subject to the CSRD must report three taxonomy KPIs:
- Proportion of taxonomy-aligned turnover: what percentage of revenues derives from eligible and aligned activities.
- Proportion of aligned CapEx: what percentage of investments goes to eligible and aligned activities, or towards transitioning to them.
- Proportion of aligned OpEx: what percentage of relevant operating expenditure corresponds to eligible and aligned activities.
For companies with low levels of taxonomy-aligned activities, this can discourage certain ESG funds (classified as Article 8 or 9 under SFDR) from investing in them. Conversely, for companies with significantly aligned activities — renewable energy, energy efficiency, sustainable construction, electric mobility — taxonomy alignment is a powerful communication tool with investors and lenders.
ESG strategy: beyond compliance
The most costly mistake a company can make when approaching ESG is treating it exclusively as a compliance exercise. Organisations that extract the most value from their ESG agenda are those that integrate sustainability objectives into business strategy, not those that build an isolated sustainability department whose primary function is producing reports.
Strategic ESG integration involves:
Risk and opportunity assessment: climate scenario analysis (recommended by the TCFD and required by ESRS E1) is not merely a reporting exercise. It is a strategic planning tool that helps identify which parts of the business are most vulnerable to transition and physical risks, and what opportunities emerge from decarbonisation.
Value chain and due diligence: the CS3D and ESRS S2 push companies to understand their supply chains in depth, with the result that many discover for the first time that they have suppliers with significant labour, environmental, or governance risks. Proactive management of these risks prevents operational disruptions and future legal liability.
Innovation and new products: the transition to a low-carbon economy creates market opportunities across all sectors. Companies that incorporate ESG into their innovation process — designing more efficient products with lower carbon footprints and greater durability — access high-value customer segments and public procurement contracts that require sustainability criteria.
Sector-by-sector: the most relevant ESRS for Spain’s principal sectors
The impact of the ESRS varies significantly by sector:
Industrial and manufacturing: E1 (emissions), E5 (circular economy), S1 (occupational safety), and G1 (supply chain governance) are the most relevant. Scope 3 emissions from buyers of industrial products generate the most pressure on manufacturers to measure and report upstream emissions.
Financial sector: E1 (physical and transition risks in credit and investment portfolios), S4 (responsible financial products), and G1 (ESG risk governance) are the most relevant. The SFDR adds further sector-specific layers of obligation on top of the CSRD.
Real estate and construction: E1 (emissions from assets in use and under construction), E4 (biodiversity in development projects), and E5 (circular economy in construction waste management) are priorities. The taxonomy for building construction has demanding technical criteria (energy efficiency class A or B) that determine asset eligibility for green finance.
Agri-food sector: E2 (soil and water pollution from fertilisers and pesticides), E3 (water use), E4 (biodiversity), and S2 (labour conditions in the agricultural supply chain) are the most critical and generate the greatest data challenges.
At BMC we support companies throughout the ESG reporting journey. See our ESG and sustainability advisory services.
