Your company already generates much of the data that GRI and ESRS need: energy, water, waste, emissions, workforce information, supplier records and supporting evidence. Costs increase when each framework becomes a separate project and teams collect, reconcile and validate the same information repeatedly.
The GRI vs ESRS question is therefore about building a common foundation for cost control, operational decisions, GRI disclosures and the regulatory outputs required under CSRD. A company should establish which obligations apply before deciding how to organise its reporting work.
This is particularly relevant in Spain, where many businesses already prepare an Estado de Información No Financiera (EINF), or non-financial information statement. Those existing processes can provide useful information for GRI and ESRS, but the frameworks have different requirements and should not be treated as interchangeable.
The European framework also changed during 2026. The Commission adopted revised ESRS on 3 July 2026, announcing a reduction of more than 60% in mandatory datapoints. Adoption, publication and application are distinct milestones: confirm the legally applicable version and reporting period before updating your mapping.
This guide explains the standards, identifies what can be reused and shows how to maintain source data independently of any single disclosure format.
Mapping GRI disclosures to ESRS requirements? See how Dcycle helps organise environmental data for operational analysis and multiple reporting outputs.
Request a demoWhat is GRI?
The GRI Standards allow an organisation to communicate its impacts on the economy, the environment and people. Their starting point is impact materiality: identifying the topics that represent the organisation’s most significant impacts, including impacts on human rights.
The standards combine Universal Standards with applicable Sector and Topic Standards. This provides a structure for information on energy, emissions, water, waste, employment and supply-chain activities. The assessment determines which impacts need attention; it is not simply a selection of topics that make the company look favourable.
Why companies use GRI
GRI is useful for organisations seeking a global disclosure framework. A Spanish multinational may use it to communicate group-wide impacts even where some operations are outside CSRD scope. It can also support responses to customers, investors and other stakeholders seeking comparable impact information.
However, using GRI does not automatically satisfy CSRD. Existing data and evidence can be reused, while the additional requirements of the applicable ESRS must be assessed separately.
What are ESRS?
The European Sustainability Reporting Standards are used to prepare sustainability information required under CSRD. Unlike a purely voluntary reporting choice, they form part of a European regulatory regime for entities within its scope.
ESRS use double materiality. This considers both the company’s impacts on people and the environment and sustainability-related risks and opportunities that can have financial effects on the business. The standards cover environmental, social and governance matters.
For an entity required to report under CSRD, ESRS are not an optional alternative to GRI. They provide the standards for the required sustainability statement. GRI can remain a complementary output for other reporting purposes.
CSRD developments affecting Spanish companies in 2026
Before comparing reporting standards, establish whether the legal obligation applies. The 2026 amendment to EU reporting rules narrows the general future scope for EU undertakings and groups to those exceeding both:
- An average of 1,000 employees during the financial year.
- EUR 450 million in net turnover.
For groups, the relevant assessment is on a consolidated basis. Application periods, national transposition, exemptions and transitional provisions must also be checked. A business should not assume that the thresholds alone settle every current-year obligation.
Spanish businesses need to assess how existing EINF processes relate to the European framework. A legal assessment of Spain’s transposition position must identify its reference date; an earlier assessment does not confirm the position in a later reporting period. Check the current national rules before changing an existing filing process.
Where both regimes are relevant, use the EINF and CSRD comparison to separate their requirements. A common source of data does not make two legal reporting regimes equivalent.
GRI vs ESRS: 5 key differences
The practical differences concern materiality, legal purpose, disclosure structure, assurance and geographic use. The table summarises the distinction; the sections below explain what it means for the data model.
| Dimension | GRI | ESRS |
|---|---|---|
| Status | Global standards widely used voluntarily | Reporting standards for entities subject to CSRD |
| Materiality | Impact materiality | Double materiality |
| Structure | Universal, Sector and Topic Standards | General and topical European standards |
| Main use | Global communication of impacts | Sustainability statements required under CSRD |
| Assurance | Not imposed by the GRI Standards themselves | Limited assurance under the CSRD regime |
1. GRI starts with impacts; ESRS adds financial materiality
GRI identifies material topics from significant impacts on the economy, the environment and people. ESRS incorporates the impact perspective and adds financial materiality. A matter can be material because of an impact, a financial risk or opportunity, or both.
A previous GRI assessment can therefore provide useful evidence for CSRD, but it does not automatically replace a double materiality assessment. Document how existing impact findings are used and where the financial perspective requires additional work.
2. ESRS is required when CSRD applies
GRI can be used voluntarily across markets, although another legal or contractual requirement may reference it. ESRS is tied to the CSRD reporting obligation for entities within scope. An obligated company cannot choose GRI instead of the required ESRS statement.
Using both can still make sense. The regulatory output should meet its own requirements, while a GRI output can address global stakeholder expectations using compatible underlying information.
3. Disclosure structures differ
The same electricity consumption, water record or workforce information can contribute to both frameworks. What changes is the definition, context, calculation or location of the disclosure. A shared physical record is not necessarily a complete disclosure in either framework.
Keep the source data independent of the reporting template. A requirement mapping should explain which records support a disclosure and what additional narrative, breakdown or calculation is needed.
4. CSRD includes mandatory assurance
CSRD requires limited assurance over the relevant sustainability information. The 2026 amendment removed the previously envisaged progression towards reasonable assurance and provides for EU limited-assurance standards by 1 July 2027. Do not plan the engagement on the assumption of an automatic progression between assurance levels.
Traceability matters because a reviewer needs more than a final number. Retain the source, method, transformations and approval history. Reusing evidence can reduce repeated preparation, but the reviewer still determines the procedures required for the engagement.
5. GRI has a global role; ESRS serves the European regime
GRI can be used by organisations in different markets. ESRS responds to the EU’s CSRD regime. A Spanish multinational may consequently use GRI for global communications and ESRS for the entities or group subject to the European obligation.
Avoid creating a separate database for each purpose. Define which entities, periods and activities each output includes, then apply those boundaries to the shared information.
Tip: Use interoperability guidance as a starting point, not proof of equivalence. Check the disclosure definition, reporting boundary and standard version before reusing a result.
Are GRI and ESRS compatible?
There is a high degree of interoperability in impact reporting. GRI and EFRAG published a GRI–ESRS Interoperability Index to relate requirements and help avoid unnecessary duplication. This supports reuse without making all disclosures identical.
The version matters. Earlier mapping materials predate the revised ESRS adopted in July 2026. Treat them as a starting point and validate each correspondence against the standards applicable to the reporting period, rather than assuming an older index remains complete.
Digital preparation is a separate issue. EFRAG’s digital reporting guidance explains that mandatory tagging depends on adoption of the relevant ESEF rules. A published or draft XBRL taxonomy does not, by itself, make tagging mandatory. Prepare identifiable data without presenting future technical requirements as an existing blanket obligation.
Where GRI and ESRS overlap
Many source records can support both frameworks. Reuse requires consistent periods, units and evidence, together with a check of any output-specific definition or calculation.
Climate, energy and emissions
Electricity, fuel, fleet and emissions records can support GRI disclosures and the corresponding ESRS climate requirements. Calculate a common consumption record once, then identify any adjustments needed for different disclosure boundaries or methods.
Water
Withdrawals, consumption and other operational water information can support relevant GRI and ESRS requirements. Keep those quantities distinct: a record of water withdrawn should not be relabelled as water consumed without the necessary calculation and evidence.
Waste and materials
Materials, waste generation and treatment records can be reused across applicable disclosures. The work should focus on mapping and resolving differences in classification, rather than asking operations to supply the same source information repeatedly.
Workforce
Employee and other workforce records can support relevant GRI disclosures and ESRS own-workforce information. Maintain the appropriate population, calculation basis and access controls. An HR connection can reduce manual reconciliation, but does not establish that every social disclosure uses the same definition.
Business conduct
Anti-corruption and business-conduct information also have areas of overlap. Reuse supporting evidence where appropriate while checking each framework’s required context. Interoperability means that part of the evidence and underlying information can be shared, not that a disclosure can always be copied unchanged.
Need to reuse energy, emissions, water and waste records across GRI and ESRS? Explore a shared environmental data foundation with Dcycle.
See the platformShould a Spanish company use GRI, ESRS or both?
The answer depends on applicable obligations and the information users need. Start with the reporting perimeter and existing work rather than choosing a framework solely because it appears simpler.
If the company is within CSRD scope
ESRS should guide the regulatory output. That does not require abandoning GRI: a global GRI report may continue to use much of the same source information. Keep one controlled set of records and document the requirements of each output.
If the company is outside the revised CSRD scope
Do not build a full ESRS process solely on the assumption that the company might become obligated later. Equally, do not discard useful environmental records already collected. Customers, banks, investors and parent companies may still need information, subject to applicable limits and proportionality requirements.
If the company already uses EINF and GRI
This is an important Spanish use case. Identify information already available from EINF and GRI, determine what can be reused and assess the additional requirements that genuinely arise from CSRD. A third, isolated ESRS database creates reconciliation work instead of resolving the underlying problem.
5 steps to align GRI and ESRS
Use the following sequence to connect legal scope, materiality and source records. Agree ownership before collecting additional information so teams do not duplicate an existing process.
1. Check whether CSRD applies
Review the entity or group, reporting year, current thresholds and national implementation. The 2026 changes can alter the priority of a project, but they do not necessarily remove the operational value of information already structured.
2. Start with double materiality when ESRS is required
Use a previous GRI impact assessment as evidence where appropriate, then add the financial perspective and the documentation required for ESRS. The CSRD double materiality guide explains the assessment process and how to retain its reasoning.
3. Map existing data
Begin with what the business already holds, including:
- Energy consumption from invoices and meters.
- Fleet fuel records.
- Travel activity.
- Waste quantities and treatment information.
- Supplier records.
- Workforce information.
- Associated evidence and supporting documents.
Relate each record to the applicable GRI and ESRS requirements. Identify genuine gaps rather than generating a new request for every disclosure identifier.
4. Maintain one controlled calculation methodology
Centralise organisational boundaries, periods, units, emission factors and calculation rules. Where two outputs require different treatment, document the difference explicitly. The framework should consume a controlled result instead of creating an unexplained alternative version of it.
5. Link evidence to the underlying record
An electricity invoice is evidence of consumption, not merely a document in a “GRI 2026” folder. That consumption may support GRI, ESRS, a footprint calculation and a cost analysis. Connect the evidence to the record and retain its approval history so each output can reuse it appropriately.
5 mistakes when managing GRI and ESRS
The main risks arise when standards become separate data processes. These mistakes can be prevented through shared definitions, explicit mapping and checks during the year.
1. Assuming a GRI report satisfies CSRD
High interoperability can reduce work, but CSRD has additional requirements, including double materiality and assurance. Use existing GRI information as an input and perform a separate assessment of the applicable ESRS gaps.
2. Maintaining two independent spreadsheets
A GRI file and an ESRS file may initially seem manageable. The problem appears when an emissions correction reaches only one of them. Keep a validated source record with controlled mappings to both outputs.
3. Designing data exclusively around a report
When every field exists only because a standard requests it, a regulatory change forces the model to be rebuilt. The Commission’s July 2026 announcement described reductions of more than 60% in mandatory ESRS datapoints and more than 70% overall. Operational records remain useful even when a disclosure changes.
Structure purchases, consumption, suppliers, emissions, water and waste as business information first. Then determine what each framework needs from that foundation.
4. Treating interoperability as equivalence
Similar requirements can still differ in materiality, definitions and context. Use mapping tables to guide the work, then validate the applicable disclosure. A shared source does not eliminate the need for framework-specific narrative or calculations.
5. Waiting until year-end to reconcile results
Discovering differences after closing requires teams to find documents and owners again. Validate records during the year, retain changes and resolve discrepancies before generating final outputs.
From GRI and EINF to a CSRD-ready data foundation
For many Spanish companies, the difficulty is having a different process for EINF, GRI, CSRD, a customer questionnaire and a bank request. If each request restarts collection, the administrative cost grows even when the required number of datapoints decreases.
Start with physical business data. Electricity supports cost analysis and emissions calculations; purchasing information can support Scope 3 and supplier decisions; waste records can reveal inefficiencies and feed environmental disclosures. GRI and ESRS then become outputs from a common foundation.
From separate reports to multi-framework workflows
Existing information comes from financial systems, HR, procurement, operations and earlier disclosures. Problems arise when each report recalculates emissions, revalidates consumption and stores evidence in its own folders.
Keep common metrics and map them to the requirements of each output. If an ESRS disclosure changes, review that relationship without automatically rebuilding the source record. Maintain the distinction between environmental data and the social or governance information also required in a complete statement.
How Dcycle helps coordinate GRI and ESRS
Dcycle is an environmental data platform that helps teams structure information already generated through energy, emissions, water, waste and suppliers. Instead of reconstructing it for isolated requests, the company can maintain a common foundation for finance, operations, reviewers and reporting teams.
An electricity record can retain its source, period, unit and evidence, then support the relevant GRI or ESRS output and an operational cost review. A source and change history helps teams explain how a metric was obtained and identify the information genuinely missing for an output.
Confirm the required mapping and export workflow for the standards and versions you use. A platform does not replace materiality decisions, legal scope analysis or independent assurance. Explore Dcycle’s CSRD software and available frameworks using a real record and its supporting evidence.
Conclusion
GRI and ESRS have important differences, but managing them as entirely separate projects creates avoidable work. For a Spanish company already using GRI or preparing EINF, the starting point is the information it holds, followed by a clear assessment of what ESRS adds.
Interoperability does not mean copying a GRI report into an ESRS template. It means avoiding repeated calculation, validation and documentation of the same underlying activity. Standards can change while the business still needs reliable information about energy, emissions, water, waste, workforce and the value chain.
Maintain that information with clear ownership, traceability and output-specific definitions. The same foundation can then support costs and operational decisions alongside the disclosures each framework requires.
Ready to organise GRI and ESRS around shared environmental records? Talk to Dcycle about your data sources and reporting perimeter.
Request a demoFrequently asked questions (FAQs)
Can I use GRI and ESRS at the same time?
Yes. A company can use GRI for global impact reporting and ESRS for an applicable CSRD statement. Reuse source data where definitions and boundaries are compatible, with separate mappings and any additional information required by each output.
Does ESRS replace GRI completely?
No. ESRS provides the standards for required CSRD sustainability statements, while GRI can remain useful for voluntary global disclosures. A GRI report does not substitute for the ESRS information an obligated entity must provide.
Which is easier to implement first?
Start with the applicable obligation and existing data rather than assuming one framework is always easier. A prior GRI assessment can help with impact information, but ESRS also requires the financial materiality perspective. Complexity depends on boundaries, topics, data quality and review requirements.
What if I already report with GRI but CSRD now applies?
Check scope and timing, reuse relevant data and evidence, perform double materiality and assess gaps against the applicable ESRS. Plan assurance and check the current digital reporting rules separately. The work has no universal completion time.
How do GRI materiality and ESRS double materiality differ?
GRI focuses on the organisation's most significant impacts on the economy, the environment and people. ESRS considers impact materiality and financial materiality. A matter can be material from either perspective or both.
Can Dcycle export to both GRI and ESRS formats?
Dcycle supports reuse of environmental data across reporting outputs. Confirm the required GRI disclosures, ESRS version, mapping and export format with the team. The workflow should retain evidence and definitions rather than assume every output is identical.
How can companies use ESRS, GRI and TCFD together without duplicating data?
Maintain shared activity, impact, risk and emissions records, then map them to the requirements of each intended output. Retain framework-specific definitions and verify whether a legacy TCFD request or a current disclosure regime applies. Reuse evidence while documenting any differences.
