Scope 3 Emissions Estimator
Ireland

Scope 3 emissions reporting in Ireland: CSRD transposition via the European Union (Corporate Sustainability Reporting) Regulations 2024 (S.I. No. 336 of 2024); Climate Action and Low Carbon Development (Amendment) Act 2021; Public Sector Climate Action Mandate

Ireland transposed the CSRD through S.I. No. 336 of 2024, bringing Irish entities meeting the CSRD size thresholds into the scope of ESRS reporting. Ireland's corporate profile is distinctive. The country hosts European headquarters or significant operations for many of the world's largest technology companies (Apple, Google, Microsoft, Meta), pharmaceutical companies (Pfizer, Johnson & Johnson, MSD), and financial services firms, alongside a domestic economy of SMEs. For technology and pharmaceutical entities, Scope 3 Category 1 (purchased goods, components, and cloud infrastructure) and Category 11 (use of sold products) dominate. For Ireland's significant agricultural sector (which produces approximately 37% of national GHG emissions per the EPA), supply chain emissions from livestock feed, fertiliser, and downstream food processing are material. The Climate Action and Low Carbon Development (Amendment) Act 2021 commits Ireland to a 51% reduction in GHG emissions by 2030 relative to 2018 and net zero by 2050, creating policy pressure on both direct and indirect emissions.

Regulatory context: Irish Auditing and Accounting Supervisory Authority (IAASA); Environmental Protection Agency (EPA); Sustainable Energy Authority of Ireland (SEAI)

IAASA supervises financial reporting quality for public interest entities in Ireland and will enforce CSRD sustainability reporting. The EPA publishes Ireland's national GHG inventory under the UNFCCC and EU Monitoring Mechanism Regulation, providing sectoral emission data. The SEAI (Sustainable Energy Authority of Ireland) publishes Irish energy statistics, energy emission factors, and energy efficiency data. SEAI's annual Energy in Ireland report provides the official Irish grid emission factor and sectoral energy consumption data. The CRU (Commission for Regulation of Utilities) regulates the electricity and gas markets. EirGrid (the transmission system operator) publishes real-time and historical generation mix data that underpins the grid emission factor. For Irish entities participating in the EU ETS, the EPA is the competent authority for emissions permit administration. The Companies Registration Office (CRO) will receive sustainability reports filed by Irish companies under CSRD. Irish entities that are subsidiaries of non-EU parents may also fall within CSRD scope under the third-country provisions if they generate over EUR 150 million in EU net turnover.

Practical guidance for Ireland

Irish entities estimating Scope 3 should use SEAI emission factors for Irish energy and EPA data for waste and agriculture. The Irish grid emission factor is approximately 0.290 kg CO2e per kWh (2023 location-based, per SEAI data), reflecting a generation mix that includes natural gas (approximately 45%), wind (approximately 35%), and smaller contributions from peat (declining), coal, solar, and imports. Ireland's rapid wind energy build-out (the government targets 80% renewable electricity by 2030) means the grid emission factor is falling year-on-year, which affects Scope 3 categories involving Irish electricity consumption. For Category 1, Ireland's pharmaceutical sector requires emission factors for active pharmaceutical ingredient production, which typically occurs overseas. Use ecoinvent or supplier-specific data for imported pharmaceutical inputs. For the technology sector, data centre energy is a major issue: data centres consumed approximately 21% of Ireland's total electricity in 2023 (per EirGrid data), making Category 1 (purchased cloud services) or Scope 2 (depending on whether the entity owns or leases the data centre) a significant reporting line. For Category 6 (business travel), Irish entities in multinational groups generate substantial air travel emissions from transatlantic flights between Dublin and US headquarters.

Audit expectations

Irish statutory auditors performing CSRD assurance apply ISA (Ireland) standards and will follow IAASA's guidance on sustainability assurance, aligning with ISAE 3000 (Revised). IAASA has published guidance on the quality expectations for sustainability assurance engagements. Irish assurance providers expect entities to clearly delineate the boundary between Irish operations and group-level reporting, particularly where the Irish entity is a subsidiary of a US or other non-EU parent. For technology companies, the boundary between data centre operations (Scope 2 if the entity owns the data centre) and cloud services procurement (Scope 3 Category 1 if the entity uses a third-party cloud) is a frequent area of examination. Irish agricultural entities (dairy cooperatives, meat processors) face assurance scrutiny on their Category 1 upstream emissions from milk and livestock procurement, where the emission factor depends on the farming system (pasture-based versus intensive) and feed composition.

Ireland-specific considerations

Ireland's economy presents a statistical peculiarity for Scope 3. Modified GNI (GNI*) rather than GDP is the preferred measure of Irish economic activity because GDP is distorted by multinational intellectual property transfers and aircraft leasing. This distortion does not directly affect Scope 3 calculations, but it means that spend-based emission factors calibrated to GDP or revenue may produce anomalous results for Irish entities with large intellectual property assets. Use physical activity-based methods where possible for Irish multinationals to avoid this issue. Ireland's dairy sector is globally significant: Ornua and Kerry Group export Irish dairy products worldwide. The Teagasc Marginal Abatement Cost Curve for Irish agriculture provides sector-specific emission reduction pathways. The EPA's agricultural emission factors account for Ireland's predominantly grass-based farming system, which has a different emission profile from grain-fed systems. Bord Bia's Origin Green programme collects farm-level sustainability data that dairy cooperatives can use for Scope 3 Category 1 estimation. Ireland's peat-fired power stations at Edenderry are transitioning to biomass, which affects the grid emission factor and the classification of biogenic versus fossil emissions for entities sourcing electricity from these plants.

Common inspection findings

IAASA's 2024 review of climate disclosures by Irish listed entities found that Scope 3 reporting was limited to business travel and employee commuting for most entities, with upstream procurement and downstream product use categories rarely quantified.

The EPA identified that some Irish EU ETS installations reported emissions figures to the EU ETS registry that did not reconcile with the energy consumption data reported to SEAI under the Public Sector Monitoring and Reporting programme.

Irish assurance providers found that pharmaceutical entities operating in Ireland frequently excluded the emissions from API (active pharmaceutical ingredient) manufacturing at overseas contract manufacturing sites from their Scope 3, despite this being their largest Category 1 emission source.

IAASA noted that several Irish entities disclosed Scope 3 figures using UK DEFRA emission factors rather than Irish-specific SEAI factors for electricity, producing incorrect estimates because the Irish and UK grid emission factors differ by approximately 40%.

The CRU's review of large energy users found that some data centre operators classified under CSRD did not include the embodied carbon of IT hardware (servers, networking equipment) in their Scope 3 Category 2, despite the rapid refresh cycle (three to five years) making this a recurring material emission source.