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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 company’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 doesn’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. 
  • 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

You’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 it’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

Here’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 you’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 organisation’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: