If you have looked into sustainability reporting for your business, you have probably encountered a wall of acronyms — GRI, CDP, ESRS, ISSB, TCFD. Each framework claims to be the standard. The reality is that they serve different purposes, different audiences, and carry different levels of obligation. For Irish businesses, knowing which ones actually apply to you — and how they interact — is the difference between efficient compliance and wasted effort.
The challenge is not just understanding each framework in isolation. It is understanding how they overlap, where they diverge, and which combination creates real obligations for your specific company.
ESG reporting frameworks are structured systems for disclosing a company’s environmental, social, and governance performance. The five major frameworks — ESRS, GRI, CDP, ISSB (IFRS S1/S2), and TCFD — differ in whether they are mandatory or voluntary, who they serve, and how they define what is material. For most Irish companies, ESRS under the CSRD is the one that carries legal weight.
Key Takeaways
- ESRS is the only mandatory ESG reporting framework for in-scope Irish companies — it is legally required under the Corporate Sustainability Reporting Directive (CSRD)
- GRI remains the most widely used voluntary framework globally and has high interoperability with ESRS, making it a useful stepping stone for companies preparing for CSRD
- CDP is investor-driven and scores companies on climate, water, and forests disclosure — responding to CDP questionnaires can satisfy parts of your ESRS climate reporting
- ISSB (IFRS S1 and S2) focuses on investor-relevant financial materiality and has absorbed TCFD, but is not yet mandatory in Ireland or the EU
- The frameworks are converging — GRI and EFRAG have mapped ESRS to GRI, and ISSB has incorporated TCFD recommendations, reducing the duplication burden over time
The ESG Reporting Landscape
Ten years ago, sustainability reporting was largely voluntary. Companies chose a framework, reported what they wanted, and the market rewarded effort over rigour. That era is ending.
The proliferation of frameworks created a fragmented landscape — companies reporting under multiple standards, investors unable to compare disclosures, and regulators frustrated by inconsistency. The current phase of ESG reporting is defined by convergence and mandation. The EU has moved first with ESRS, making detailed sustainability reporting a legal obligation. The ISSB is setting a global baseline. GRI and CDP are aligning their standards with both.
For Irish businesses, this convergence is ultimately good news — it means you will not need to report under five separate frameworks indefinitely. But right now, the landscape is in transition. Frameworks are converging but have not converged. Requirements overlap but do not fully align. And the regulatory environment continues to shift, with the Omnibus Directive having recently changed the CSRD scope thresholds.
Navigating this landscape without specialist guidance means spending significant time interpreting regulatory requirements rather than running your business. If you would rather get a clear answer on which frameworks apply to you, talk to our team — we can map your obligations in a single conversation.
ESRS — European Sustainability Reporting Standards
ESRS is the framework that matters most for Irish companies. It is mandatory under the CSRD, and it is the most comprehensive sustainability reporting standard in the world.
What It Requires
ESRS comprises 12 topical standards covering all ESG dimensions:
- Environmental: Climate change (E1), Pollution (E2), Water and marine resources (E3), Biodiversity and ecosystems (E4), Resource use and circular economy (E5)
- Social: Own workforce (S1), Workers in the value chain (S2), Affected communities (S3), Consumers and end-users (S4)
- Governance: Business conduct (G1)
- Cross-cutting: General requirements (ESRS 1) and General disclosures (ESRS 2)
Key Features
ESRS uses double materiality — companies must report on topics that are significant from an impact perspective (how your business affects people and the environment) or a financial perspective (how sustainability issues affect your business). This is broader than any other framework.
Reports must be independently assured, digitally tagged in XBRL, and included in the management report alongside financial statements. Non-compliance carries penalties under Irish company law.
Who Must Report
Under the original CSRD thresholds, large companies meeting two of three criteria (250+ employees, EUR 50m+ revenue, EUR 25m+ total assets) were due to report from 2026. However, the Omnibus Directive (February 2026) raised the thresholds to 1,000+ employees and EUR 450m+ net turnover, with Phase 2 reporting now starting from FY 2027 (reports due 2028). Listed SMEs follow from 2028.
Why ESRS Is Challenging
ESRS is not just broader than other frameworks — it is more demanding in terms of data rigour, documentation, and assurance. The disclosure requirements run to hundreds of pages, the Omnibus changes have created interpretive complexity around transitional provisions, and the requirement for independent assurance means your data must withstand external scrutiny. Companies familiar with voluntary frameworks like GRI often underestimate the step change that mandatory ESRS reporting represents. If you are preparing for ESRS and want to understand the gap between where you are and where you need to be, reach out — we specialise in exactly this transition.
GRI — Global Reporting Initiative
GRI is the world’s most widely used sustainability reporting framework. Over 10,000 organisations in more than 100 countries report using GRI Standards. It is voluntary, but its influence on mandatory frameworks — particularly ESRS — is significant.
What It Covers
GRI Standards are organised into Universal Standards (foundation, general disclosures, material topics), Sector Standards (industry-specific guidance), and Topic Standards (detailed ESG disclosures). The framework focuses on impact materiality — how your organisation affects the economy, environment, and people — which aligns closely with one half of ESRS double materiality.
For companies already reporting under GRI, the transition to ESRS is more manageable — but it is not seamless. You will need to add financial materiality assessments, meet ESRS-specific data points, satisfy XBRL tagging requirements, and prepare for independent assurance. The gap between “GRI-ready” and “ESRS-compliant” is larger than many companies expect, and closing it requires careful gap analysis rather than assumptions about overlap.
Irish Relevance
GRI is not legally required in Ireland, but many Irish multinationals and large companies use it voluntarily. If you are preparing for CSRD, existing GRI reporting gives you a foundation — but transitioning from voluntary GRI to mandatory ESRS requires careful gap analysis to understand what additional data, processes, and governance structures you need.
CDP — Carbon Disclosure Project
CDP operates a global disclosure system where companies, cities, and regions report their environmental data. Unlike GRI and ESRS, CDP is driven by investors and purchasing organisations who request disclosure from companies in their portfolios or supply chains.
How It Works
CDP runs annual questionnaires across climate change, water security, and forests. Companies receive a scored assessment that institutional investors and multinational purchasing organisations use to evaluate supply chain sustainability performance.
Key Features
CDP’s supply chain programme is particularly relevant for Irish businesses — large multinationals increasingly require suppliers to disclose through CDP. For a detailed look at how to prepare, see our CDP reporting guide. Even if your company is not in scope for CSRD, you may face CDP requests from your supply chain.
CDP has aligned its questionnaire with TCFD recommendations and is mapping it to ESRS, meaning a CDP response can serve double duty as preparation for mandatory reporting. However, achieving a competitive CDP score while ensuring consistency with your ESRS disclosures requires deliberate coordination — the overlap is real but not automatic.
Irish Relevance
CDP disclosure is voluntary, but investor and supply chain pressure makes it practically important for many Irish companies. If your major customers are requesting CDP scores, non-response carries commercial consequences. The challenge is preparing a CDP response that is thorough enough to achieve a competitive score while efficiently leveraging the same data for ESRS compliance.
ISSB — IFRS S1 and S2
The International Sustainability Standards Board (ISSB), part of the IFRS Foundation, published two standards in June 2023: IFRS S1 (general sustainability-related financial disclosure) and IFRS S2 (climate-specific disclosure covering governance, strategy, risk management, and metrics).
Key Features
ISSB focuses exclusively on financial materiality — what matters to investors. This is a narrower lens than ESRS double materiality, but it creates a global baseline that jurisdictions can adopt. ISSB has formally incorporated the TCFD recommendations, and several jurisdictions — including the UK, Australia, and Japan — are adopting ISSB standards or basing national standards on them.
Irish Relevance
ISSB standards are not currently mandatory in Ireland or the EU. The EU has chosen ESRS as its reporting framework, which goes beyond ISSB in scope. However, EFRAG and ISSB have published interoperability guidance, and companies reporting under ESRS will largely satisfy ISSB requirements for climate topics. If you operate in or raise capital from jurisdictions adopting ISSB, you may need to consider it alongside ESRS.
TCFD — Task Force on Climate-Related Financial Disclosures
TCFD was established by the Financial Stability Board in 2015 to develop recommendations for climate-related financial disclosures. Its four-pillar structure — Governance, Strategy, Risk Management, Metrics and Targets — became the global standard for climate disclosure and influenced every framework that followed.
Legacy and Successor
In October 2023, the ISSB formally assumed responsibility for monitoring TCFD progress, and the TCFD itself was disbanded. Its recommendations live on through IFRS S2, which incorporates and extends the TCFD framework.
If you see TCFD referenced in investor requests or reporting guidance, understand that it has been folded into ISSB. New reporters should use IFRS S2 or ESRS E1 rather than referencing TCFD directly.
Irish Relevance
TCFD was never mandatory in Ireland, though some Irish financial institutions and listed companies adopted it voluntarily. It remains relevant as background knowledge — the concepts of climate risk governance, scenario analysis, and transition planning that TCFD introduced are now embedded in both ESRS and ISSB.
Framework Comparison
| Feature | ESRS | GRI | CDP | ISSB (IFRS S1/S2) | TCFD |
|---|---|---|---|---|---|
| Status | Mandatory (EU/Ireland) | Voluntary | Voluntary | Voluntary (EU); mandatory in some jurisdictions | Disbanded (absorbed into ISSB) |
| Materiality | Double materiality | Impact materiality | Aligned with TCFD/ISSB | Financial materiality | Financial materiality |
| Scope | All ESG topics (E, S, G) | All ESG topics | Climate, water, forests | Sustainability-related financial risks | Climate only |
| Audience | Regulators, investors, stakeholders | All stakeholders | Investors, supply chain | Investors, capital markets | Investors, lenders, insurers |
| Assurance | Required (limited, moving to reasonable) | Recommended | CDP verification | Jurisdiction-dependent | Not specified |
| Irish Relevance | High — legally required for large companies | Medium — voluntary but useful preparation | Medium — supply chain pressure | Low — not yet adopted in EU | Low — legacy framework |
| Interoperability | Mapped to GRI; interoperable with ISSB | Mapped to ESRS | Aligning with ESRS and ISSB | Interoperable with ESRS | Incorporated into ISSB |
Why Framework Selection Matters
The comparison table above gives you the facts, but it does not capture the real challenge: deciding which frameworks to invest in, in what order, and how to structure your data and processes so that one investment serves multiple reporting obligations.
This is where most companies get stuck. The interoperability between frameworks is real, but it is not automatic — it requires deliberate architectural decisions about data collection, boundary definitions, and materiality methodology that align across every framework you report under. Getting this design wrong means collecting the same data in multiple formats, discovering inconsistencies between reports at audit time, and facing credibility problems with investors, customers, and regulators.
The companies that navigate this efficiently do not treat it as a research project — they bring in specialist support to map the overlaps, design the data architecture, and build once for multiple reporting obligations. Talk to our team if you want to get this right from the start rather than discovering gaps mid-cycle.
Which Frameworks Apply to Irish Businesses
The answer depends on your company’s size, listing status, supply chain relationships, and where you raise capital. At a high level:
- ESRS is mandatory for large companies meeting the Omnibus thresholds (1,000+ employees and EUR 450m+ net turnover), listed SMEs, and certain Irish subsidiaries of non-EU parents
- GRI is worth considering if you want to build reporting capability before CSRD enters scope or if stakeholders expect it
- CDP matters if major customers or investors have requested disclosure — supply chain pressure makes it practically important regardless of your CSRD status
- ISSB and TCFD can largely be set aside if you operate primarily in Ireland and the EU, since ESRS covers and exceeds their requirements
The real challenge is not identifying which frameworks apply in theory — it is understanding how your specific obligations interact and building a reporting approach that serves all of them efficiently. The permutations of size, sector, listing status, and supply chain relationships mean that no two companies have exactly the same framework map. If you want a definitive answer for your business, we can provide one quickly.
How Clearscope Helps
The framework landscape is complex, and it is getting more complex as regulations evolve. Determining which frameworks create obligations for your company, understanding how they interact, and building a reporting approach that serves multiple requirements efficiently requires specialist knowledge that most businesses do not have in-house.
We help Irish businesses navigate the ESG reporting landscape with clarity:
- Regulatory obligation mapping — determining exactly which reporting requirements apply to your company based on size, sector, listing status, and supply chain relationships, so you know where to focus
- Integrated reporting strategy — designing a single data architecture and reporting process that feeds ESRS, GRI, and CDP simultaneously, eliminating duplication and inconsistency
- ESRS readiness — double materiality assessments, gap analysis, and data collection systems for CSRD compliance
- GRI-to-ESRS transition — identifying exactly where your existing voluntary reporting falls short of mandatory ESRS requirements and building a plan to close the gaps
- CDP response support — preparing questionnaire responses that achieve competitive scores while leveraging your ESRS data
- Carbon accounting — building the emissions data foundation that feeds into ESRS, GRI, and CDP reporting with consistent methodology
The difference between managing this in-house and working with specialists is not just speed — it is the confidence that your reporting is complete, consistent, and defensible across every framework that applies to your business.
Contact us to discuss your ESG reporting strategy.
Frequently Asked Questions
Which ESG reporting framework is mandatory for Irish companies?
ESRS under the CSRD is the only legally mandated framework. Following the Omnibus Directive, it applies to companies with 1,000+ employees and EUR 450m+ net turnover, with Phase 2 reporting from FY 2027. Other frameworks remain voluntary but may carry commercial weight.
What is the difference between ESRS and GRI?
ESRS is mandatory and uses double materiality; GRI is voluntary and covers impact materiality only. They are interoperable, but the gap between GRI-ready and ESRS-compliant is substantial — particularly around financial materiality, assurance, and digital tagging requirements.
Do I need to report under both ESRS and ISSB?
For most Irish companies, ESRS is the primary obligation and substantially covers ISSB requirements. Separate ISSB reporting is generally unnecessary unless you raise capital in jurisdictions that have adopted it.
Is TCFD still relevant?
TCFD was disbanded in 2023 and its recommendations are now incorporated into ISSB (IFRS S2) and reflected in ESRS E1. It is no longer a standalone framework — use ESRS E1 or IFRS S2 instead.
Should my company respond to CDP if we are already preparing for CSRD?
If investors or major customers have requested it, yes — CDP carries real commercial weight. Your CSRD data will help, but achieving a competitive CDP score requires deliberate alignment between your ESRS and CDP disclosures.