Irish Corporate Travel Emissions Benchmark 2026

Executive summary

Corporate travel emissions represent a material disclosure category for Irish-headquartered firms entering the first wave of Corporate Sustainability Reporting Directive (CSRD) compliance. With large undertakings required to report against European Sustainability Reporting Standards (ESRS) for financial years beginning on or after 1 January 2024, and mid-sized firms following in subsequent waves, Scope 3 Category 6 business travel data has moved from optional to obligatory for hundreds of Irish entities.

This benchmark report synthesises publicly available data from the Central Statistics Office (CSO), the Sustainable Energy Authority of Ireland (SEAI), Fáilte Ireland, and international reference methodologies including GHG Protocol, DEFRA, and IATA RP1726. We propose a framework for estimating per-employee travel emissions across air, hotel, and ground transport components, while acknowledging the inherent uncertainty in national-level extrapolations.

Our indicative modelling suggests that a typical Irish corporate traveller undertaking four return flights per year (one long-haul, two short-haul EU, one domestic), alongside eight hotel nights and associated ground transport, may generate between 2.2 and 3.8 tonnes of CO₂-equivalent annually from business travel alone. Significant variance exists across sectors, with technology and pharmaceutical firms trending higher due to international parent-company relationships and client geographies.

We examine how booking-layer retirement mechanisms can route corporate accommodation spend through channels that retire verified carbon credits at the point of transaction, providing auditable per-booking records suitable for disclosure purposes. One such mechanism retires one tonne of UN-verified CO₂ on-chain per hotel booking—approximately twenty-eight times the average per-night hotel footprint—funded from supplier commission rather than guest surcharge.

This report is intended to inform, not prescribe. All estimates should be validated against entity-specific travel data before incorporation into formal disclosures.

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Why IE-corporate travel emissions matter in 2026 — CSRD timing

The regulatory landscape for climate disclosure has shifted fundamentally for Irish businesses. The Corporate Sustainability Reporting Directive, transposed into Irish law through the European Union (Corporate Sustainability Reporting) Regulations 2024, mandates that large undertakings report against the European Sustainability Reporting Standards (ESRS) beginning with their 2024 financial year reports, published in 2025. By 2026, corporate sustainability reports covering the 2025 financial year will be subject to limited assurance requirements, with many Irish firms publishing their second cycle of CSRD-compliant data.

For the purposes of this report, we focus on the 2026 reporting context, where firms will be reporting on 2025 calendar year activities or preparing enhanced systems for 2026 data capture.

Scope 3 Category 6 as a material category

Under the GHG Protocol Corporate Value Chain Standard, Scope 3 Category 6 encompasses business travel in vehicles not owned or operated by the reporting company. This includes air travel, hotel accommodation, rail, taxi, and rental car use for business purposes. For professional services, technology, and pharmaceutical sectors—disproportionately represented in the Irish corporate landscape—business travel frequently constitutes between 5 and 15 per cent of total Scope 3 emissions, depending on the nature of operations and supply chain intensity.

ESRS E1 (Climate Change) requires undertakings to disclose Scope 3 emissions by category where material, including the methodologies, emission factors, and data quality assessments applied. The standard does not mandate a specific emission factor source but expects consistency with recognised frameworks such as DEFRA, EPA, or IATA methodologies.

The Irish corporate context

Ireland's position as a European headquarters hub for multinational technology, pharmaceutical, and financial services firms creates a distinctive travel profile. CSO data indicates that outbound business travel from Ireland has recovered to approximately 87 per cent of 2019 levels as of Q3 2024, with air travel to the United States, United Kingdom, and continental Europe dominating. The concentration of decision-making functions in Irish-registered entities means that Scope 3 Category 6 emissions may be more material for Irish subsidiaries than for operational centres in other jurisdictions.

Simultaneously, Ireland's Streamlined Energy and Carbon Reporting (SECR) obligations, while primarily a UK mechanism, affect Irish firms with UK operations or listings. CDP disclosure requests—increasingly tied to procurement decisions—also require Category 6 data with growing specificity.

The intersection of CSRD, SECR, and CDP creates a compliance environment where robust, auditable business travel emissions data is no longer discretionary. Firms without systematic capture mechanisms risk both regulatory exposure and reputational cost in an increasingly emissions-literate procurement landscape.

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Methodology — how we approach a per-employee benchmark from public data

Constructing a per-employee business travel emissions benchmark for Irish firms requires triangulating multiple data sources of varying granularity and recency. We outline our approach, assumptions, and the limitations inherent in national-level estimation.

Data sources

Central Statistics Office (CSO): The Household Travel Survey and Cross Border Survey provide aggregate data on travel purposes, including business. The Overseas Travel statistics capture outbound and inbound passenger movements by destination and purpose, though business travel is not always disaggregated with precision.

Sustainable Energy Authority of Ireland (SEAI): Energy in Ireland reports provide fuel consumption data for transport sectors, alongside emission coefficients. These coefficients align broadly with DEFRA factors but are calibrated to the Irish energy mix.

Fáilte Ireland: Accommodation capacity and occupancy statistics provide baseline room-night data, though business versus leisure segmentation is limited at the published aggregate level.

DEFRA Conversion Factors 2024: The UK Department for Environment, Food and Rural Affairs publishes annually updated emission factors for transport modes, hotel stays (by country and star rating), and ancillary travel activities. We apply these factors where Irish-specific equivalents are unavailable, noting the methodological assumption involved.

IATA RP1726: The International Air Transport Association's recommended practice for calculating passenger CO₂ emissions provides the aviation industry's standard methodology, incorporating cabin class, load factor, and aircraft type considerations.

GHG Protocol Technical Guidance for Scope 3 Category 6: This framework establishes the boundary conditions for business travel accounting, including treatment of radiative forcing multipliers for aviation and allocation principles for shared transport.

Estimation approach

We construct a notional 'typical Irish business traveller' profile based on the following assumed parameters:

• Air travel: Four return flights per annum—one long-haul (transatlantic), two short-haul EU, one domestic or UK
• Hotel accommodation: Eight nights per annum, distributed across Irish and international destinations
• Ground transport: A blend of taxi, rail, and rental car use totalling approximately 400 kilometres per annum in connection with business travel

These parameters are illustrative. Actual corporate profiles vary substantially by sector, seniority, and business model. We present sensitivity ranges throughout.

Emission factor application

For air travel, we apply DEFRA 2024 factors with radiative forcing multiplier (RFI) of 1.9 for high-altitude aviation effects, consistent with GHG Protocol guidance for comprehensive accounting. We note that some disclosure frameworks permit exclusion of radiative forcing; where relevant, we provide both figures.

For hotel accommodation, we apply DEFRA's per-night factors by country grouping, supplemented by Cornell Hotel Sustainability Benchmarking Index coefficients where available for more granular estimates.

For ground transport, we apply SEAI coefficients for Irish segments and DEFRA for international, using average vehicle assumptions rather than specific fleet data.

Per-employee aggregation

We calculate a notional per-employee figure by applying the above parameters to a single traveller, then discuss sectoral adjustments based on travel intensity assumptions derived from industry benchmarking studies and professional services surveys.

All per-employee figures should be understood as indicative ranges rather than precise benchmarks. Firms should calculate actual emissions from primary travel booking data where available.

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Air component — domestic vs. EU vs. long-haul, per-trip kg CO₂

Aviation consistently represents the largest component of corporate travel emissions, often accounting for 70 to 85 per cent of Category 6 totals for internationally connected firms. The emission profile varies substantially by journey distance, cabin class, and the treatment of radiative forcing effects.

Methodology for aviation emissions

We apply IATA RP1726 principles, which allocate aircraft fuel consumption to passengers based on cabin class factors (reflecting seat pitch and weight allocation) and load factors (the proportion of seats occupied). DEFRA 2024 factors operationalise this methodology into per-passenger-kilometre coefficients.

For economy class, DEFRA 2024 provides the following factors (excluding radiative forcing):

• Domestic flights: 0.24587 kg CO₂e per passenger-kilometre
• Short-haul international: 0.15102 kg CO₂e per passenger-kilometre
• Long-haul international: 0.14787 kg CO₂e per passenger-kilometre

The reduction in per-kilometre factors for longer flights reflects higher average load factors and more fuel-efficient cruise conditions. However, the absolute emissions per journey increase substantially with distance.

For business class, factors increase by approximately 2.9× for long-haul and 1.5× for short-haul, reflecting larger seat allocations.

Radiative forcing considerations

Aviation emissions at altitude produce additional warming effects beyond CO₂ alone, including contrail formation and nitrogen oxide impacts. The GHG Protocol permits—but does not require—application of a radiative forcing index (RFI) multiplier. A commonly applied factor is 1.9, meaning that total climate impact is estimated at 1.9× the CO₂-only emission.

For CSRD purposes, ESRS E1 does not mandate RFI inclusion, but does require disclosure of methodological choices. We present figures both with and without RFI for transparency.

Illustrative journey emissions

Applying the above factors to typical Irish business travel routes:

Dublin to London (430 km one-way, 860 km return):

• Economy, without RFI: 130 kg CO₂e
• Economy, with RFI (1.9×): 247 kg CO₂e
• Business class, with RFI: 370 kg CO₂e

Dublin to Frankfurt (1,100 km one-way, 2,200 km return):

• Economy, without RFI: 332 kg CO₂e
• Economy, with RFI: 631 kg CO₂e
• Business class, with RFI: 947 kg CO₂e

Dublin to New York (5,100 km one-way, 10,200 km return):

• Economy, without RFI: 1,508 kg CO₂e
• Economy, with RFI: 2,865 kg CO₂e
• Business class, with RFI: 8,309 kg CO₂e

Dublin to Cork (domestic, 220 km one-way, 440 km return):

• Economy, without RFI: 108 kg CO₂e
• Economy, with RFI: 205 kg CO₂e

Annual air travel estimate

For our notional business traveller profile (one transatlantic return, two EU short-haul returns, one UK/domestic return), the annual air travel footprint ranges from:

• Lower bound (economy, no RFI): Approximately 2,100 kg CO₂e
• Upper bound (mixed cabin, with RFI): Approximately 4,200 kg CO₂e

The variance demonstrates the sensitivity of Category 6 totals to cabin class policy and radiative forcing treatment. Corporate travel policies that mandate economy class for short-haul or limit business class to flights exceeding defined thresholds can materially reduce reported emissions.

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Hotel component — Cornell index applied to a typical 2-night IE business stay

Hotel accommodation represents a smaller but non-trivial component of business travel emissions, typically accounting for 10 to 20 per cent of Category 6 totals. The emission intensity of hotel stays varies by energy source, building efficiency, occupancy rates, and service intensity.

Emission factor approaches

DEFRA country-level factors: DEFRA 2024 provides per-night emission factors by country grouping. For Ireland (within the 'Western Europe' category), the factor is approximately 15.9 kg CO₂e per room-night for an average hotel. For the United States, the factor rises to approximately 23.6 kg CO₂e per room-night, reflecting the higher carbon intensity of the US electricity grid.

Cornell Hotel Sustainability Benchmarking Index: Cornell University's Hotel Sustainability Benchmarking programme provides more granular factors by hotel category and region, derived from actual metered energy consumption data. For European business hotels, the index suggests a range of 12 to 25 kg CO₂e per room-night, with full-service hotels at the higher end and limited-service properties lower.

Irish hotel carbon intensity

Ireland's electricity grid has decarbonised substantially in recent years, with SEAI data indicating that approximately 40 per cent of electricity was generated from renewable sources in 2023, rising toward 50 per cent by 2025 under current trajectories. This reduces the carbon intensity of electric heating, cooling, and lighting in Irish hotels compared to coal-dependent grids.

However, many Irish hotels, particularly older properties, rely on oil or gas heating systems. The blend of grid electricity, on-site combustion, and fugitive emissions from refrigeration creates a per-property variance that country-level factors cannot capture.

For the purposes of this benchmark, we apply a midpoint estimate of 16 kg CO₂e per room-night for Irish hotel stays, with a range of 12 to 22 kg CO₂e depending on property type and energy source.

Typical business trip profile

A two-night Irish business trip, at our midpoint estimate, would generate approximately 32 kg CO₂e from accommodation. For international travel, emissions per night are typically higher:

• Two nights in London: approximately 32 kg CO₂e (similar grid carbon intensity to Ireland)
• Two nights in Frankfurt: approximately 36 kg CO₂e (German grid still partially coal-dependent)
• Two nights in New York: approximately 47 kg CO₂e (US grid and HVAC intensity)

Annual hotel estimate

For our notional business traveller profile (eight room-nights distributed 50 per cent domestic/Ireland, 50 per cent international), the annual hotel accommodation footprint is estimated at:

• Midpoint estimate: 144 kg CO₂e
• Range: 100 to 200 kg CO₂e

While modest compared to aviation, hotel emissions offer a distinctive opportunity for offset-integrated booking mechanisms, which we discuss in Section 8.

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Ground transport component — taxi vs. rail vs. EV-rental

Ground transport during business trips—airport transfers, intercity travel, and local mobility—contributes a variable but generally smaller share of Category 6 emissions. The carbon intensity varies substantially by mode.

Emission factors by mode

Taxi (conventional petrol/diesel): DEFRA 2024 provides a factor of approximately 0.21 kg CO₂e per passenger-kilometre for a regular taxi, assuming single occupancy. Black cab/hackney factors are slightly higher at 0.23 kg CO₂e per kilometre.

Rail: Irish Rail (Iarnród Éireann) operates a mixed fleet of diesel and electric multiple units. SEAI data suggests an average factor of approximately 0.04 kg CO₂e per passenger-kilometre for intercity rail, though this varies by route and load factor. European high-speed rail factors are similar, at 0.03 to 0.05 kg CO₂e per kilometre.

Rental car (average): DEFRA's average car factor is approximately 0.17 kg CO₂e per kilometre for a medium petrol car. Electric vehicle rentals reduce this substantially, depending on grid carbon intensity—in Ireland, an EV rental might generate approximately 0.05 kg CO₂e per kilometre.

Illustrative journey emissions

Dublin Airport to city centre (13 km):

• Taxi: 2.7 kg CO₂e
• Bus: 0.9 kg CO₂e

Dublin to Cork (265 km):

• Rail: 10.6 kg CO₂e
• Rental car (petrol): 45 kg CO₂e
• Rental car (EV): 13 kg CO₂e

London Heathrow to City of London (24 km):

• Taxi: 5.0 kg CO₂e
• Heathrow Express (rail): 0.7 kg CO₂e

Policy implications

Corporate travel policies that mandate rail for intercity journeys below defined distance thresholds, or require EV rental bookings where available, can reduce ground transport emissions by 60 to 80 per cent compared to taxi and conventional rental defaults.

Annual ground transport estimate

For our notional business traveller profile (400 km of ground transport per annum, blended mode), the annual ground transport footprint is estimated at:

• Midpoint estimate (blended mode): 60 kg CO₂e
• Range: 30 to 120 kg CO₂e depending on mode split

Ground transport is the most policy-responsive category, offering near-term emission reductions through booking system defaults and traveller guidance.

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Sector benchmark table — finance, tech, pharma, professional services, manufacturing

Business travel intensity varies substantially by sector, reflecting differences in client geography, internal meeting culture, and operational models. We present indicative per-employee estimates for key Irish corporate sectors, derived from the component analysis above and adjusted for sector-specific travel patterns suggested by industry surveys and published benchmarks.

Sector adjustment factors

We apply adjustment multipliers to our 'typical traveller' baseline based on the following assumptions:

• Financial services: Higher frequency of short-haul EU travel for regulatory engagement and client meetings; moderate long-haul travel; above-average business class usage. Multiplier: 1.2×
• Technology: High frequency of US travel for headquarters meetings; significant conference attendance; mixed cabin class policies. Multiplier: 1.4×
• Pharmaceutical/Life sciences: Very high US travel intensity; regulatory agency meetings; clinical site visits. Multiplier: 1.5×
• Professional services (legal, accounting, consulting): High domestic and short-haul EU travel; moderate US travel; variable cabin class. Multiplier: 1.1×
• Manufacturing: Lower travel intensity for operational staff; concentrated in management/sales functions. Multiplier: 0.7×

These multipliers are illustrative and should not be applied without reference to entity-specific data.

Indicative sector benchmarks

Sector	Air (kg CO₂e)	Hotel (kg CO₂e)	Ground (kg CO₂e)	**Total (kg CO₂e)**
Technology	2,900–5,900	200–280	40–100	**3,100–6,280**
Pharmaceutical	3,100–6,300	220–300	50–110	**3,370–6,710**
Financial services	2,500–5,000	170–240	50–120	**2,720–5,360**
Professional services	2,300–4,600	160–220	50–100	**2,510–4,920**
Manufacturing	1,500–2,900	100–140	30–80	**1,630–3,120**

Table notes: Ranges reflect lower bound (economy class, no RFI) to upper bound (mixed cabin, with RFI). All figures are per-employee annual estimates for staff who travel. Non-travelling staff should be excluded from per-employee calculations or weighted accordingly.

Interpretation guidance

These benchmarks represent estimates for travelling employees, not whole-workforce averages. A technology firm where 40 per cent of staff travel for business would calculate company-wide per-employee emissions by weighting the above figures accordingly.

For CSRD disclosure, firms should report actual calculated emissions from booking data where available, using these benchmarks only for gap-filling or materiality assessment purposes.

Variance drivers

Within each sector, substantial variance arises from:

• Geographic client base: US-facing roles generate 2–3× the air emissions of EU-focused roles
• Seniority mix: Senior executives typically fly business class and travel more frequently
• Virtual meeting adoption: Firms with robust video conferencing infrastructure report 20–40 per cent lower travel intensity post-pandemic
• Sustainability policy stringency: Mandatory economy class, rail-first, and offset requirements shift distributions

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The booking-layer offset routing approach — how a corporate travel policy can route bookings through an offset-anchored channel for direct retirement traceability

Traditional carbon offsetting involves purchasing credits retrospectively, often annually, based on estimated or reported emissions. This approach creates temporal and accounting gaps, complicates audit trails, and separates the emission-generating activity from the mitigation action.

An alternative model integrates carbon retirement directly into the booking transaction, providing per-booking traceability and reducing administrative burden for corporate sustainability teams.

Mechanism description

Certain accommodation booking platforms now offer offset-integrated booking channels where a verified carbon credit is retired at the moment of transaction. The retirement is funded from the platform's supplier commission rather than charged to the corporate booker or individual traveller.

One such mechanism operates as follows:

• For each hotel booking made through the platform, one tonne of UN-verified CO₂ is retired on-chain
• This retirement amount is approximately twenty-eight times the average per-night hotel carbon footprint
• The retirement is recorded with a unique serial number traceable to the specific booking
• No surcharge is applied to the booking rate; the cost is absorbed within the commission structure
• Retirement records are available in formats suitable for corporate Scope 3 disclosure

This mechanism is currently available across 1,985+ hotels in over 100 Irish towns, providing domestic coverage alongside international inventory.

Disclosure utility

For CSRD purposes, the per-booking retirement approach offers several advantages:

Traceability: Each booking generates a documented retirement record with serial number, date, project reference, and tonnage. This supports the ESRS E1 requirement for methodological transparency and data quality disclosure.

Temporal matching: Retirements occur concurrently with the travel activity, eliminating the lag between emission and mitigation that characterises annual offset purchases.

Additionality assurance: UN-verified credits under mechanisms such as the Clean Development Mechanism or successor frameworks carry additionality certification, addressing a common critique of voluntary offset programmes.

Administrative efficiency: Rather than aggregating travel data, calculating emissions, and procuring offsets separately, the booking-layer approach embeds retirement into existing procurement workflows.

Policy implementation

Corporate travel managers can implement booking-layer offset routing through:

1. Preferred supplier designation: Adding offset-integrated booking platforms to approved supplier lists
2. Booking tool integration: Configuring travel management company systems to surface offset-integrated options prominently
3. Policy mandates: Requiring use of offset-integrated channels for defined booking categories (e.g., all domestic accommodation)
4. Reporting integration: Establishing data feeds from booking platforms to sustainability reporting systems

Limitations of the approach

Booking-layer offset mechanisms address accommodation emissions but do not automatically cover air travel, which represents the majority of Category 6 emissions. A comprehensive approach requires parallel mechanisms or supplementary offset programmes for aviation and ground transport.

Additionally, offset retirement—whether integrated or retrospective—represents mitigation rather than reduction. Corporate travel policies should prioritise absolute emission reduction through mode shift, virtual meeting substitution, and travel avoidance before relying on offset mechanisms.

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Disclosure framework — mapping to CSRD ESRS E1 line items

The European Sustainability Reporting Standards (ESRS) E1 Climate Change standard establishes detailed disclosure requirements for greenhouse gas emissions. We map the business travel elements discussed in this report to the relevant ESRS E1 datapoints.

Relevant disclosure requirements

E1-6: Gross Scopes 1, 2, 3 and Total GHG emissions

Undertakings must disclose gross Scope 3 emissions disaggregated by material categories. Business travel falls under GHG Protocol Category 6 and should be disclosed where material.

Required disclosures include:

• Total Category 6 emissions in tonnes CO₂e
• Percentage of Category 6 emissions calculated using primary data versus secondary data
• Emission factors and GWP values applied

E1-7: GHG removals and GHG mitigation projects financed through carbon credits

Where undertakings use carbon credits to mitigate emissions, ESRS E1-7 requires disclosure of:

• Total amount of carbon credits verified against recognised quality standards
• Percentage used for voluntary carbon credit cancellations
• The quality criteria and standards applied
• Whether credits are from removal or reduction projects

Booking-layer retirement mechanisms that provide per-booking serial numbers and UN verification documentation can support these disclosures.

E1-3: Actions and resources in relation to climate change policies

Corporate travel policies that mandate booking-layer offset channels, economy class travel, or rail-first approaches should be disclosed as transition plan actions.

Documentation requirements

For audit purposes, CSRD disclosures require underlying data to be available for limited assurance review. Relevant documentation includes:

• Booking platform reports showing transaction volumes and retirement records
• Emission factor sources with version dates
• Calculation methodologies and assumptions
• Data quality assessments per GHG Protocol guidance

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Limitations and caveats

This benchmark report is intended as an informational framework rather than a prescriptive calculation methodology. Users should note the following limitations:

Data currency

Public data sources referenced herein (CSO, SEAI, Fáilte Ireland, DEFRA) are subject to periodic revision. Emission factors and statistical aggregates may be updated between publication cycles. Users should verify current factor versions before applying to disclosure calculations.

Estimation uncertainty

Per-employee benchmarks are derived from assumed travel profiles rather than measured corporate data. Actual emissions vary substantially based on:

• Individual travel patterns and frequencies
• Cabin class policies and compliance
• Destination mix and journey distances
• Hotel selection and energy efficiency
• Ground transport mode choices

National-level estimates cannot capture this entity-specific variance. Firms should calculate emissions from primary booking data where available.

Scope boundaries

This report addresses Scope 3 Category 6 (business travel) only. Related categories that may intersect include:

• Category 7 (Employee commuting): Excluded from this analysis
• Category 1 (Purchased goods and services): May include travel agency services
• Category 3 (Fuel and energy-related activities): Upstream emissions from transport fuels

Boundary alignment with GHG Protocol and ESRS standards should be verified.

Offset mechanism claims

Statements regarding offset-integrated booking mechanisms are limited to the verified mechanic described (one tonne UN-verified CO₂ retired on-chain per hotel booking, approximately twenty-eight times average per-night footprint, funded from supplier commission). No claims are made regarding offset quality beyond UN verification status, nor regarding comparisons with other offset mechanisms or providers.

Regulatory interpretation

CSRD and ESRS interpretation continues to evolve through EU guidance, Member State transposition, and assurance practice development. Disclosure approaches outlined herein reflect current understanding and may require adjustment as regulatory guidance develops.

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Conclusion and recommended next steps for corporate travel managers

Irish corporate travel emissions represent a quantifiable, reportable, and—to a meaningful degree—manageable component of Scope 3 disclosure requirements. As CSRD compliance matures from first-cycle reporting into routine practice, firms that establish robust data capture, apply consistent methodologies, and integrate mitigation mechanisms into booking processes will be better positioned than those retrofitting systems under audit pressure.

Key findings

1. A typical Irish business traveller may generate between 2.2 and 3.8 tonnes of CO₂-equivalent annually from business travel, with substantial variance by sector and role.

1. Aviation dominates the emission profile, accounting for 70 to 85 per cent of Category 6 totals for internationally connected firms.

1. Cabin class policy, radiative forcing treatment, and destination mix are the primary variance drivers within air travel emissions.

1. Booking-layer offset mechanisms offer per-transaction traceability and administrative efficiency for accommodation emissions, though they address only a portion of the total travel footprint.

Recommended actions

Immediate (0–6 months):

• Establish baseline Category 6 emissions from existing booking data
• Verify emission factor sources and document methodology for audit purposes
• Review travel policy for economy class, rail-first, and virtual meeting provisions

Near-term (6–18 months):

• Evaluate booking-layer offset integration for domestic and international accommodation
• Implement reporting feeds from travel management systems to sustainability data platforms
• Develop sector-specific intensity metrics for internal target-setting

Medium-term (18–36 months):

• Establish reduction targets aligned with science-based trajectory frameworks
• Integrate Category 6 considerations into procurement criteria for travel suppliers
• Prepare for enhanced assurance requirements as CSRD audit standards develop

Business travel emissions are neither the largest nor the most complex element of corporate Scope 3 disclosure, but they are among the most actionable. The combination of available data, established methodologies, and emerging booking-layer solutions provides a pathway from estimation to management that many other categories do not yet offer.