Collect Data Once, Report Multiple Times: ESRS, VS, GRI, IFRS, and EMAS in Combination
Hardly any company reports using just one framework. The management report follows the European Sustainability Reporting Standards (ESRS); investors ask for IFRS S1 and S2; long-standing stakeholders expect the usual reporting in accordance with the Global Reporting Initiative (GRI) standards; facilities are validated under the Eco-Management and Audit Scheme (EMAS), and customers send questionnaires based on the new Voluntary Standard (VS). The question is rarely which framework is the right one. Rather, it is: How often do you have to collect the same data?
The answer is: as long as the underlying data layer is correct. In this article, you’ll learn about the official bridges between the frameworks, where they connect, where they end, and how to align your data collection with them.
As of August 2026. The information regarding the Voluntary Standard refers to the delegated act dated July 3, 2026, which has not yet been reviewed by the Parliament and the Council. For the scope and timeline of the Corporate Sustainability Reporting Directive (CSRD), please see our article on the CSRD Implementation Act.
Five frameworks, five purposes, one dataset
The frameworks compete with one another less than it might initially appear. They address different questions for different audiences.
| Framework | Recipient | Binding nature | Concept of Materiality | Official Link to the ESRS |
|---|---|---|---|---|
| ESRS | Management Report, All Stakeholders | Requirement within the scope of the CSRD | Twofold: Impact and Financial Implications | Reference point |
| VS (Voluntary Standard) | Business partners, banks, customers | voluntary, while also serving as an upper limit for requests within the value chain | Simplified; no analysis required | Based on the VSME and aligned with the revised ESRS; delegated act dated July 3, 2026 |
| GRI | Stakeholders in General | voluntarily | Impact | GRI-ESRS Interoperability Index, November 22, 2024 |
| IFRS S1 and S2 | Capital Markets, Investors | mandatory depending on the jurisdiction | Financial | ESRS-ISSB Interoperability Guidance, May 2, 2024 |
| EMAS | Community Outreach, Government Agencies | voluntary, but validated | Environmental Aspects by Location | EFRAG Reconciliation with High-Level Correspondence Table, January 16, 2025 |
The practical value of this overview lies in the fourth column. Anyone who confuses the concepts of materiality will structure the data collection incorrectly because they will define the scope and boundaries incorrectly.
The Voluntary Standard replaces the VSME and becomes the upper limit in the value chain
On July 3, 2026, the European Commission adopted two delegated acts: the revised ESRS and the Voluntary Standard (C(2026) 5011). The VS builds on the existing Voluntary Standard for Small and Medium-Sized Enterprises (VSME) but changes its legal form: Recommendation (EU) 2025/1710 of July 30, 2025, will become a delegated regulation, and the recommendation will cease to have effect upon the regulation’s entry into force.
The modular structure remains unchanged. The basic module, covering disclosures B1 through B11, includes fundamental information as well as environmental, social, and governance metrics; the comprehensive module, covering disclosures C1 through C9, adds disclosures for banks, investors, and business customers. Two changes compared to the VSME are relevant in practice: The number of data points has decreased because the standard has been aligned with the revised ESRS, and for companies with ten or fewer employees, certain environmental disclosures—most of which are more complex—are voluntary.
The real innovation lies in the standard’s second function. It sets an upper limit on the information that reporting companies may request from business partners with up to 1,000 employees for the purposes of sustainability reporting. More specifically: The upper limit does not cover the entire standard, but rather the data points identified as essential in Annex II of the legal act, and it is lower for companies with no more than ten employees. Protected companies may refuse to provide further information, and anyone requesting more must inform them of this right.
For you, this means two things: As a company subject to reporting requirements, you should tailor your supplier inquiries to this scope. As a smaller company, you no longer respond to questionnaires that go beyond this scope out of obligation, but solely out of business interest.
Effective Date: The upper limit applies to fiscal years beginning on or after January 1, 2027. Companies may voluntarily report in accordance with the standard as early as the date the regulation takes effect.
Important: The cap applies to the collection of information for sustainability reporting. Requirements under Union or national law, as well as those under contracts, remain unaffected. For banks, insurers, and other financial market participants, however, the legislation calls on them to align their other requests to companies with up to 1,000 employees with the standard as much as possible.
A common index is available for GRI
EFRAG and GRI have developed a GRI-ESRS Interoperability Index, Version 1 of which was published on November 22, 2024. It maps GRI disclosures to ESRS requirements at the level of individual data points and highlights where coverage is incomplete.
The classification of discrepancies is particularly useful. The index distinguishes between three types: differences in granularity or data types, differences in scope, and differences in definitions. Only the third category necessitates a second survey. For the first two, it is generally sufficient to record the size in greater detail or to document the scope.
Both organizations describe the level of interoperability as high. Organizations that comply with the ESRS can meet GRI reporting requirements with relatively few additional disclosures. The reverse is not true, however: An existing GRI report does not meet the ESRS requirements.
There is a common guideline for IFRS S1 and S2
On May 2, 2024, the IFRS Foundation and EFRAG published ESRS-ISSB Standards Interoperability Guidance. It addresses two areas: general requirements—namely, materiality, presentation, and disclosures on non-climate-related topics—as well as climate-related disclosures in detail.
Coverage is greatest for climate-related disclosures. Both frameworks are based on the Greenhouse Gas Protocol and require reporting of Scope 1, 2, and 3 emissions. Organizations that have fully collected ESRS data on climate change need only add a few items to meet the ISSB requirements. We have discussed the partnership between ISO and the GHG Protocol elsewhere in relation to the development of the underlying standards.
The key difference lies in the concept of materiality. The ESRS require a dual materiality test, while IFRS S1 and S2 focus solely on financial materiality. A topic that is material under ESRS but has no financial relevance does not appear in an ISSB report, and an ISSB report therefore does not replace a dual materiality analysis. It is helpful in this regard that the guideline describes the definition of financial materiality as identical in both frameworks. This is precisely what underpins the reusability of the data: it is the same question, asked once on its own and once as part of a larger audit matrix.
Classification under the GRI Index and the ISSB Guidance: The GRI Index and the ISSB Guidance refer to ESRS Set 1 of 2023. EFRAG has announced an update for the revised ESRS, but as of August 2026, it was not yet available. Therefore, for each mapping, check whether the relevant data point is affected by the revision.
EMAS provides verified environmental data, but not at the corporate level
On January 16, 2025, EFRAG published a comparison between the ESRS and EMAS, consisting of the guidance document “Understanding the Synergies between ESRS and EMAS” and a high-level correspondence table. The finding: Much of the data that is already collected in the EMAS environmental management system and validated by an environmental verifier can be reused for the sustainability statement in the management report.
You should plan for three limits:
- EMAS is site-specific, while the ESRS are company-specific. The environmental statement covers registered sites, while the sustainability statement covers the Group’s scope of consolidation. Without a clear mapping of sites to companies, EMAS data cannot be used to generate an ESRS value.
- EMAS covers environmental issues, but not social issues or governance. The system does not provide a database for the ESRS S and G standards.
- The cycles are diverging. The validation and updating of the environmental statement follow their own schedule, which is not tied to the balance sheet date.
There is also a procedural issue: Validation by an environmental verifier does not replace the audit of sustainability reporting. According to the German government’s draft bill, sustainability reports may only be audited by certified public accountants. The Bundesrat has called for the inclusion of independent providers of assurance services, but the federal government has rejected this in the draft bill. EMAS data thus serves as well-documented source data, but does not substitute for an audit.
What Interoperability Doesn’t Solve
The mappings provided here are meant to assist with classification, not as automatic translation tools. Four differences remain and must be reflected in your data management:
The Concept of Materiality. Double reporting under ESRS, impact-based reporting under GRI, financial reporting under IFRS S1 and S2, and environmental aspect-based reporting under EMAS. He decides which topics should be included in the report at all.
The scope of consolidation. Site under EMAS, Group under ESRS, reporting entity under IFRS. The same metric can mean different things depending on the scope.
The definition of the key performance indicator. Water consumption, employee turnover, and workplace accidents are not consistently defined in the same way across the frameworks. Where definitions differ, mapping is of no help; the only solution is to introduce a second, clearly labeled metric.
The level of detail in the audit. The sustainability statement is audited with limited assurance; the EMAS environmental statement is validated by an environmental verifier; and a GRI report is generally not audited at all. The level of evidence required for each figure therefore varies considerably.
Here’s how to build the data structure so that you only need to collect the data once
Based on our projects, five principles have proven to be effective:
Maintain a data point catalog, not report templates. The catalog is the only source of truth; the reports are derived from it. Anyone who instead copies and modifies reports ends up having to make the same changes multiple times.
Use the ESRS as a starting point. It is the most granular of the five frameworks and is mandatory within the scope of the CSRD anyway. All other frameworks can be mapped to it; conversely, gaps arise.
Enter five pieces of information for each size. Definition, unit, scope of consolidation, reporting period, and source. Without these five elements, a figure cannot be transferred because no one can assess whether it meets the requirements of the second framework.
Maintain the assignment as a separate table. One column per framework, one row per data point, with an indication of whether coverage is complete. This is the same system that GRI and EFRAG use in their index, only applied to your portfolio.
Track changes to the frameworks. The revised ESRS have consolidated, reordered, and renamed topics. Our overview of ESRS sustainability topics details these changes. Without version numbers in the catalog, it is no longer possible—after two reporting years—to determine why a time series shows a jump.
Use multiple frameworks from a single dataset with CONSUST
This is exactly where our FramesCube software comes in. It collects data across all companies and locations, records the definition, scope of consolidation, time period, source, and responsible person for each value, and maps the alignment with the frameworks as a separate layer. An additional report then means another analysis, not another data collection. Which information a framework requires and whether your coverage is sufficient remains a business decision; the data foundation for this is already in place.
Our article on ESRS-xBRL tagging explains how ESRS data can then be adapted for the digital reporting format. Contact us for a no-obligation consultation to discuss which frameworks you are currently using in duplicate.
This article presents a professional assessment based on the sources cited, as of August 2026, and is not a substitute for a legal review of a specific case.
