How To Include Corporate Events In Your Scope 3 Emissions Reporting
- Aug 25
- 8 min read
For businesses that regularly organise events, Scope 3 emissions reporting can quickly bring up questions that aren't always easy to answer.
A corporate event might only last a day or two, but delivering it can involve months of activity across venues, suppliers, travel, accommodation, catering, production, freight and waste.
Many of these activities take place outside your organisation's direct operations, which means they can become relevant when you start looking at your wider value chain emissions.
The challenge is understanding where those activities fit. Rather than treating an event as one single Scope 3 emission, businesses need to look at the different activities involved, understand which Scope 3 categories may be relevant and collect the right information to measure them.
In this guide, we'll explain how corporate event Scope 3 emissions can fit into your wider reporting, which areas of an event you should consider and how to start building event carbon data into your organisation's existing carbon measurement process.
What Are Corporate Event Scope 3 Emissions?
Corporate event Scope 3 emissions are the indirect emissions linked to running an event.
These can come from areas such as employee travel, suppliers, purchased goods and services, freight and waste. Because these activities often involve third parties, they can form part of the wider Scope 3 emissions a business needs to consider.
The GHG Protocol doesn't have a separate category for “events”. Instead, the different activities involved in delivering an event need to be considered within the relevant Scope 3 categories.
For an event, this means Scope 3 could potentially be relevant to activities such as:
Employee business travel
Purchased event materials and services
Freight and transportation
Waste treatment
Accommodation associated with business travel
Catering and other purchased services
Relevant supplier activity
The important thing to remember is that there isn't a dedicated GHG Protocol category called "events".
Instead, the activities involved in delivering an event need to be considered against the same Scope 3 categories used across the rest of the business.
This is what allows event carbon data to become part of a wider organisational picture rather than existing as an entirely separate sustainability exercise.
Which Scope 3 Categories Can Apply To Corporate Events?
Not every event will involve the same Scope 3 categories.
A small internal event held locally could have a relatively simple footprint, while an international conference involving hundreds of delegates, multiple suppliers and significant production could introduce considerably more activity.
There are, however, several Scope 3 categories that businesses may need to consider when looking at their events.
Purchased Goods And Services
Category 1 of the GHG Protocol covers purchased goods and services.
Events can involve significant purchasing, from catering and production services to signage, temporary materials, equipment hire and other services required to deliver the experience.
Understanding what has been purchased and obtaining useful information from suppliers can therefore be an important part of measuring corporate event Scope 3 emissions.
This is also one of the areas where working with suppliers early can make carbon data collection much easier.
Upstream Transportation And Distribution
Moving products and materials can create another source of event emissions.
Category 4 covers transportation linked to goods your business purchases, where the transport is provided by another company.
For events, this may make freight and logistics an important area to investigate, particularly where significant equipment, staging, materials or other goods need to be transported.
Waste Generated In Operations
Events can generate waste through catering, production materials, packaging, signage and general attendee activity.
Category 5 covers waste from your operations that is disposed of or treated by another company.
Collecting information about the quantity and type of waste produced, along with how it is treated, can therefore provide useful activity data when this category is relevant to your reporting boundary.
Business Travel
Business travel is likely to be particularly familiar to organisations running corporate events.
Category 6 covers transportation of employees for business-related activities in vehicles that aren't owned or operated by the reporting company.
If employees travel by train, plane, taxi or other third-party transport to attend, organise or deliver an event, those journeys may therefore be relevant to the company's existing business travel calculations.
This is an important example of why event data and wider business data shouldn't automatically be treated as separate totals.
Your company may already be measuring some event-related employee travel through its normal Scope 3 reporting process.
How Attendee Travel Fits Into Scope 3 Reporting
Attendee travel can be one of the most significant areas to understand when measuring the footprint of an event, particularly where guests are travelling long distances.
However, measuring something as part of an event carbon footprint does not automatically mean that the same activity belongs within a particular company's corporate Scope 3 inventory.
The GHG Protocol's Category 6 definition specifically relates to transportation of employees for business-related activities.
So attendee travel should not simply be labelled "business travel" without considering who is travelling, why they are travelling, the organisation's reporting boundary and which Scope 3 category, if any, appropriately applies.
You can still measure attendee travel because it gives you valuable information about the environmental impact of an event and helps identify opportunities for reduction. But your event footprint and corporate Scope 3 inventory are not necessarily identical.
If you're beginning to collect this information, our guide to tracking attendee travel emissions for events explores the data you can start gathering from guests.
Start With Your Reporting Boundary
Before collecting every piece of carbon data you can find, it's worth establishing what your Scope 3 inventory is intended to cover.
The GHG Protocol's Scope 3 framework is designed to help companies systematically organise value-chain activities across 15 mutually exclusive categories.
For corporate events, this means looking at the activities involved and asking:
Is this activity relevant to our organisational Scope 3 inventory?
Which Scope 3 category does it relate to?
Are we already capturing it elsewhere?
What activity data do we need?
Who has access to that information?
Can we collect it consistently across future events?
This step can prevent teams from collecting large amounts of information without knowing how it will eventually be used, and reduce the risk of counting the same activity twice.
Avoid Double Counting Your Event Emissions
Imagine your organisation runs an annual conference. Employees book flights and rail journeys through your company's usual travel provider, and those journeys are already included in your annual business travel calculations.
Your event team then calculates the conference footprint and includes the same employee journeys.
Both measurements can be useful for different purposes. The problem arises if the full event footprint is then added to the corporate inventory without recognising that some of those journeys have already been counted.
This is why it's better to think about the individual emissions sources underneath an event footprint.
The GHG Protocol designs its Scope 3 categories to be mutually exclusive for a reporting company, helping avoid double counting between categories.
A connected approach to carbon data can make this process easier because teams can see where event activity overlaps with information already being captured elsewhere in the organisation.
What Event Data Do You Need For Scope 3 Emissions Reporting?
Once you've identified the event activities that are relevant to your Scope 3 inventory, you can start thinking about the data needed to calculate them.
The exact information will depend on the emissions source and calculation method.
For example, useful event data could include:
Employee Travel
Transport method, journey distance, origin and destination, and potentially accommodation associated with business travel.
Purchased Goods And Services
Information about the products and services purchased to deliver the event, ideally using supplier-specific or activity data where appropriate and available.
Freight
Distance travelled, transport type, vehicle information and the quantity or weight of goods being transported where required by the calculation method.
Waste
Waste quantities, waste type and treatment method.
Supplier Information
Activity or emissions data from suppliers where this can improve the quality of your calculations.
The GHG Protocol provides calculation guidance across all 15 Scope 3 categories, including different methods depending on the quality and type of information available.
For UK organisations, the government also publishes annual greenhouse gas conversion factors that can be used with activity data such as distance travelled, fuel consumed or electricity purchased.
Managing Scope 3 Reporting When Event Data Is Limited
One of the biggest barriers to Scope 3 emissions reporting is often data availability.
You may have accurate employee travel information but limited supplier data. One venue might provide detailed information while another cannot. Some event activity may only be available through spend records.
That doesn't necessarily mean you should abandon measurement altogether.
The GHG Protocol provides multiple calculation approaches across its Scope 3 categories, while UK government guidance recognises different approaches depending on the activity and data available.
The important thing is to understand the quality of the data you're working with and be transparent about the methods used.
Over time, event teams can improve this by building carbon questions into supplier briefs, collecting travel information earlier and agreeing data requirements with venues before an event takes place.
This makes Scope 3 measurement something that improves with each event rather than a process that has to be rebuilt from scratch every time.
Build Carbon Data Collection Into Event Planning
If your sustainability team only asks for event data several months after an event has finished, gathering accurate information becomes much harder.
Suppliers may have moved onto other projects, travel information may be scattered across different systems and event teams may no longer have easy access to everything they need.
Instead, carbon data collection can become part of the planning process.
Before the event, identify which Scope 3 activities you expect to be relevant and decide who will be responsible for collecting the necessary information.
This might mean asking suppliers for specific data, ensuring employee travel can be identified as event-related, collecting freight information from production partners or planning how waste data will be provided after the event.
Doing this early can make Scope 3 emissions reporting much more manageable while also giving event teams a clearer understanding of the environmental impact of their decisions.
Connect Corporate Events With Your Wider Scope 3 Reporting
Once relevant event emissions have been measured, the next step is connecting them with the wider organisational inventory.
This doesn't mean simply adding the total carbon footprint of every event to your company's Scope 3 figure.
Instead, look at the underlying activities.
Employee travel can be incorporated into the relevant business travel data. Purchased event services can be considered alongside other purchased goods and services.
Relevant freight and waste can be incorporated into their appropriate categories.
This gives businesses a much more structured approach to corporate event carbon reporting.
It also means event teams and sustainability teams can work from the same carbon framework rather than creating separate measurement processes that eventually need to be reconciled.
Corporate Event Scope 3 Emissions With Scope
At Scope, we've designed our platform to help organisations track both business and event carbon emissions.
That matters when it comes to Scope 3 because corporate events don't necessarily sit neatly outside the rest of your organisation.
Some event-related activities may already form part of the data you're collecting across the business, while others may require information directly from event teams, attendees, venues or suppliers.
Bringing those areas together gives organisations better visibility over where emissions are coming from while still allowing teams to understand the footprint of individual events.
For organisations running multiple events throughout the year, it can also help create a more consistent approach to data collection and make it easier to identify recurring emissions hotspots.
Start Including Events In Your Scope 3 Approach
Corporate events can introduce a wide range of indirect emissions, but including them in your Scope 3 approach doesn't mean treating every event as one additional carbon figure.
Start with the activities behind the event.
Understand which are relevant to your organisational inventory, identify the appropriate Scope 3 categories and check what information your business may already be collecting.
From there, you can begin filling the gaps by working with event teams, suppliers, venues and other partners to improve the quality of your carbon data over time.
For businesses that regularly organise events, this creates a much more connected approach to Scope 3 emissions reporting and a clearer understanding of how events fit into the organisation's wider environmental impact.
Scope can help you bring business and event carbon data together, making it easier to measure emissions, understand your hotspots and build better carbon data into future event decisions.
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