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Demystifying Scope 3 Emissions: A Practical Guide to Getting Started

At Groundwork, we work with organisations across the UK to enhance their environmental and social responsibility. One common challenge we hear about? Tackling Scope 3 emissions. In this post, we break down what Scope 3 reporting entails and how to take your first steps with confidence.


Understanding the Carbon Emissions Scopes

First, its important to remember that carbon emissions are typically broken into three categories:

  • Scope 1: Direct emissions from owned or controlled sources (e.g., company vehicles, heating).
  • Scope 2: Indirect emissions from purchased electricity and cooling.
  • Scope 3: All other indirect emissions that occur in a companyโ€™s value chain, which is often the most significant and complex to measure.

Scope 3 emissions include everything from the production of purchased goods to the use and disposal of your products by customers.


The Scope 3 Reporting Process: Where to Begin

Scope 3 reporting doesnโ€™t require perfection from the start but it does require structure. Here’s a streamlined process we recommend you following:

Set a Reporting Period

Decide on the timeframe your data will cover, typically a calendar or financial year.

Identify Relevant Categories

Scope 3 covers 15 categories across upstream and downstream activities. Start by identifying which ones are most applicable to your business.

  • Upstream Categories: Purchased goods & services, capital goods, fuel and energy related activities, upstream transportation & distribution, waste, employee commuting, business travel and upstream leased assets.ย 
  • Downstream Examples: Downstream transportation & distribution, processing of sold products, use of sold products, end-of-life of sold products, downstream leased assets, franchises and investments.

For more detail and information on each category, download the GHG Protocol document Scope 3 Calculation Guidance


Build Value Chain Relationships

Youโ€™ll need cooperation from suppliers and customers in order to calculate Scope 3 emissions. Strong relationships make data collection easier and improve data quality over time. Check out our previous blog for more tips & advice on this!

Engage Your Value Chain

Share your data needs with stakeholders. Clear communication ensures better participation and accuracy.


How to Gather Scope 3 Data: Four Key Methods

Collecting data can feel overwhelming, but there are several methods to choose from:

  • Supplier Method: Request actual emissions data from suppliers. Some of their Scope 1 and 2 data can inform your Scope 3 data, therefore itโ€™s important to build that relationship for an easier data collection method.
  • Average Data Method: Use activity data (like distance or weight) and apply average emissions factors found in the DEFRA carbon emissions databases.
  • Spend-Based Method: Estimate emissions based on the amount of money spent and industry emissions averages.
  • Hybrid Method: Combine the above for a balanced, practical approach.

The supplier method is the most accurate method, however spend based data is often easier to get hold of so we recommend a using a hybrid method for your first calculations.


Engaging Suppliers and Customers

Hereโ€™s some tips to encourage stakeholder buy-in:

  • Offer training and incentives
  • Run surveys to collect data
  • Create recognition programs
  • Develop supplier-customer alliances
  • Highlight business and financial benefits

Next Steps Toward Scope 3

Once youโ€™ve gathered your data:

  1. Summarise your Scope 1, 2, and 3 emissions
  2. Use available tools and resources to calculate and analyse totals
  3. Publish your organisationโ€™s carbon footprint
  4. Improve processes over time
  5. Commit to annual reporting

If you still have questions about Scope 3 reporting or want help getting started, reach out to our team today: