CSRD Reporting: What Irish Companies Need to Know

The Corporate Sustainability Reporting Directive (CSRD) is the most significant change to corporate reporting in the EU since the introduction of IFRS. For Irish companies, it means mandatory, audited sustainability reporting against detailed European standards — not a voluntary exercise, but a legal obligation with the same regulatory weight as financial reporting.

Getting this right is not straightforward. The requirements are technically demanding, the regulatory landscape is still shifting, and the penalties for getting it wrong are real.

Who Is in Scope

CSRD applies in phases, bringing progressively more companies into scope. Each phase has been subject to significant regulatory change — most recently the Omnibus Directive — making it essential to verify the current thresholds rather than relying on earlier guidance.

Phase 1: 2025 Reporting Year (Reports Due 2026)

Companies already subject to the NFRD — large public-interest entities with more than 500 employees. In Ireland, this includes listed companies, banks, and insurance undertakings that met the NFRD thresholds.

Phase 2: 2027 Reporting Year (Reports Due 2028)

This is the phase that brings most large Irish companies into scope. The criteria were substantially changed by the Omnibus Directive — see below.

Phase 3: 2028 Reporting Year (Reports Due 2029)

Listed SMEs — companies listed on regulated markets that are not micro-enterprises. These companies can opt out until 2028, after which the obligation becomes mandatory.

Non-EU Companies

Non-EU parent companies generating EUR 150 million+ net turnover in the EU with at least one EU subsidiary or branch meeting certain thresholds must report from 2028, using separate ESRS for non-EU companies.

EU Omnibus Simplification — Important Update

In February 2025, the European Commission proposed the “Omnibus I” package to simplify CSRD and other sustainability legislation. The “Stop-the-Clock” directive, which entered into force on April 17, 2025, delayed Phase 2 reporting by two years — companies originally due to report for the 2026 financial year will now report for the 2027 financial year (reports due 2028).

On December 9, 2025, the Council and Parliament reached a provisional agreement on the substance-related Omnibus amendments, which was adopted by the Parliament on December 16, 2025 and approved by the Council on February 24, 2026. The key changes include:

• Higher scope thresholds: CSRD now applies to EU companies with more than 1,000 employees and EUR 450 million+ net turnover (up from 250 employees and EUR 50 million)
• Non-EU groups: Must have at least one EU subsidiary/branch with turnover exceeding EUR 200 million, and generate EUR 450 million+ net turnover in the EU for two consecutive years
• Simplified reporting: Significant streamlining of ESRS requirements, particularly for smaller in-scope companies

These changes substantially reduce the number of Irish companies in scope. However, the Omnibus changes themselves introduced new complexity — understanding whether you are now in scope, newly out of scope, or affected by the transitional provisions requires careful legal and regulatory analysis. If you are unsure where your company stands after these changes, talk to our team — we can give you a clear answer quickly. Companies that no longer meet the new thresholds are not required to report under CSRD, though they may still face sustainability data requests from customers and investors. The original Phase 1 companies (former NFRD entities) remain subject to reporting requirements.

The ESRS Standards: Why They Are Challenging

The European Sustainability Reporting Standards (ESRS) are the detailed disclosure requirements that CSRD mandates. They were adopted by the European Commission as delegated acts and comprise 12 topical standards plus two cross-cutting standards — spanning climate change, pollution, biodiversity, workforce conditions, value chain labour practices, community impacts, and business conduct, among others.

To give a sense of the scale: ESRS E1 (Climate Change) alone requires disclosure of Scope 1, 2, and 3 emissions, transition plans, climate risk scenario analysis, and carbon pricing exposure. ESRS S1 (Own Workforce) covers working conditions, equal treatment, health and safety, and training metrics. ESRS S2 extends similar scrutiny across your entire supply chain. And these are just three of twelve topical standards — each with its own set of mandatory and materiality-dependent data points, application requirements, and cross-references to other standards.

The challenge is not understanding what the standards cover — it is knowing how they interact, which of the hundreds of data points apply to your specific business, and how to interpret the application requirements that sit beneath each standard. The ESRS documentation runs to hundreds of pages, the Omnibus simplifications have introduced further interpretive complexity around transitional provisions, and no two companies will have the same reporting scope. This is the kind of regulatory interpretation that requires specialist expertise — talk to our team if you want a clear picture of what ESRS actually requires of your business.

The Double Materiality Assessment

Before you can determine which ESRS topics to report on, you must conduct a double materiality assessment. This is not optional — ESRS 1 mandates it as the basis for determining the scope of your report.

The assessment evaluates each sustainability topic from two perspectives:

• Impact materiality — does your business have significant impacts on people or the environment?
• Financial materiality — do sustainability issues create significant financial risks or opportunities for your business?

A topic is material — and must be reported on — if it meets the threshold from either perspective. Getting the materiality assessment wrong has cascading effects: report on too little and you face regulatory and audit risk; report on too much and you waste significant resources collecting and assuring data you did not need.

ESRS 2 (General Disclosures) is always mandatory, regardless of your materiality assessment results.

Why Data Collection Is the Hardest Part

CSRD reporting demands a level of sustainability data collection that most Irish companies have not previously maintained. The data requirements span multiple departments, external partners, and historical periods — creating overlapping workstreams that must be coordinated simultaneously.

Scope 3 and Value Chain Data

Under ESRS E1, companies must report Scope 3 emissions for all material categories — which means collecting auditable data from suppliers, logistics providers, and potentially customers. But emissions are only one dimension. ESRS also requires value chain reporting on workforce conditions at suppliers (S2), community impacts (S3), and environmental effects throughout the product lifecycle. For companies with complex or international supply chains, this data is often fragmented across dozens of external organisations, collected in inconsistent formats, or simply not available without structured engagement programmes.

Historical Comparatives and Quantitative Rigour

ESRS requires comparative data for prior periods, meaning companies entering scope in 2027 should already be collecting baseline data. The rigour expected is comparable to financial reporting — estimates must be supportable, methodologies must be consistent across periods, and your assurance provider will challenge data quality at every level. Companies accustomed to qualitative sustainability disclosures consistently underestimate the step change this represents.

The companies that handle this well do not attempt it without structured project management and specialist support. If your data collection feels overwhelming, that is a signal to bring in expertise early rather than discover gaps during assurance.

Assurance, Digital Reporting, and Penalties

Assurance Requirements

CSRD requires independent assurance of sustainability reports — initially at limited assurance level, moving to reasonable assurance (the same standard as financial statement audits, expected by 2028). This means your sustainability data must withstand external scrutiny. Assurance capacity in Ireland is still building, and engaging a provider early is critical.

Digital Reporting

All CSRD reports must be prepared in XHTML format with sustainability information tagged using the ESRS XBRL digital taxonomy. This makes your disclosures machine-readable, meaning regulators, investors, and data providers can automatically extract and compare your data. The technical requirements for XBRL tagging add another layer of specialist complexity on top of the substantive reporting work.

Penalties for Non-Compliance

CSRD is transposed into Irish law through amendments to the Companies Act. Non-compliance carries fines determined by the transposing legislation, potential director liability for signing off incomplete or inaccurate reports, regulatory action by the Irish Auditing and Accounting Supervisory Authority (IAASA), and reputational exposure — reports are publicly available and will be scrutinised by investors, customers, and civil society.

How CSRD Connects to Other Regulations

CSRD does not exist in isolation. It connects directly to:

• EU Taxonomy — CSRD requires disclosure of the proportion of your revenue, capital expenditure, and operating expenditure aligned with the EU Taxonomy
• CBAM — carbon pricing data required for ESRS E1 includes CBAM certificate costs for importers
• CSDDD — due diligence requirements under the CSRD overlap with CSDDD obligations
• EU Green Deal — CSRD is one of the Green Deal’s key transparency mechanisms
• CDP — companies disclosing through CDP will find substantial overlap with ESRS E1 climate disclosures, making CDP a useful complement to CSRD reporting

These regulatory interdependencies mean that treating CSRD as a standalone compliance project is a mistake. The same data, governance structures, and processes feed multiple obligations — but only if they are designed that way from the start. For a detailed comparison of how these frameworks relate, see our guide to ESG reporting frameworks compared.

How Clearscope Helps

CSRD compliance is not a reporting exercise — it is an operational transformation. It touches finance, operations, HR, procurement, and the board. Most Irish companies do not have the in-house expertise to interpret the ESRS requirements, conduct a defensible materiality assessment, build the data collection infrastructure, and prepare an assurance-ready report simultaneously.

We support Irish businesses through the full CSRD compliance journey:

• Regulatory interpretation — cutting through the complexity of ESRS requirements, Omnibus changes, and transposition into Irish law to give you a clear picture of what applies to your company
• Materiality assessment — conducting rigorous double materiality assessments with documented, auditor-ready methodology that stands up to assurance scrutiny
• Gap analysis and roadmap — identifying what data, processes, and governance structures you need and building a realistic implementation plan
• Data architecture — designing systems to collect Scope 3, value chain, and social data efficiently, so reporting becomes repeatable rather than a one-off scramble
• ESRS reporting and XBRL tagging — preparing compliant disclosures across all material topics in the required digital format
• Assurance readiness — ensuring your report meets the standard your auditor expects, reducing the risk of qualified opinions
• Regulatory integration — connecting CSRD with your existing ISO management systems, CBAM obligations, and climate strategy so you build once and report many times

The companies that begin their CSRD preparation with professional support report better, spend less on remediation, and face fewer surprises during assurance.

Contact us to discuss your CSRD readiness.

Frequently Asked Questions

When does CSRD apply to my Irish company?

Following the Omnibus Directive (February 2026), CSRD now applies to companies with 1,000+ employees and EUR 450m+ net turnover. Phase 2 reporting starts from FY 2027, with reports due in 2028. Companies already subject to NFRD report from 2025. Listed SMEs enter scope from 2028.

What is double materiality?

Double materiality assesses sustainability topics from two perspectives: your impact on people and the environment, and how sustainability issues affect your finances. A topic must be reported if it is significant from either direction — getting this judgement right requires structured methodology and specialist experience.

What are the ESRS standards?

ESRS are the detailed disclosure requirements mandated by CSRD — 12 topical standards plus two cross-cutting standards, spanning environmental, social, and governance topics. The standards contain hundreds of data points, and determining which apply to your business requires a documented materiality assessment.

Do CSRD reports need to be audited?

Yes. CSRD requires independent assurance — initially limited assurance, moving to reasonable assurance (the same standard as financial audits) by 2028. Your sustainability data must withstand the same external scrutiny as your financial statements.

What happens if I don't comply with CSRD?

Non-compliance carries fines under Irish company law, potential director liability, and regulatory action by IAASA. Reports are publicly available, creating reputational exposure alongside the legal risk.

How does CSRD relate to the EU Taxonomy?

CSRD requires disclosure of the proportion of your revenue, capex, and opex aligned with the EU Taxonomy. The two regulations are deeply interconnected, and preparing Taxonomy disclosures alongside ESRS reporting requires careful coordination.