Scope 4 Emissions Guide Summary
Scope 4 emissions, often referred to as avoided emissions, are becoming an important addition to how organisations understand their broader climate impact. While not yet recognised within the formal greenhouse gas reporting scopes, they offer a useful way to assess the potential emissions prevented through low‑carbon products, services or design decisions.
This guide explains the concept, outlines the different categories of Scope 4 emissions, and explores how avoided emissions can complement existing carbon reduction planning.
What Are Scope 4 Emissions
Scope 4 emissions refer to greenhouse gas emissions that are avoided due to the use of a product or service. Unlike Scopes 1, 2 and 3 which measure an organisation’s direct and indirect emissions, Scope 4 highlights the positive impact of solutions that reduce emissions elsewhere in the value chain.
Examples include:
- Technologies that reduce operational energy use
- Products that displace high‑emission alternatives
- Services that enable digital or remote activity and reduce travel.
Although not mandatory, these disclosures help organisations reflect the contribution their solutions make to wider decarbonisation.
Scope 4 is not formally recognised within mandatory carbon accounting, organisations often reference GHG Protocol guidance on avoided emissions to ensure transparency and methodological rigour when discussing avoided impacts in a sustainability report.
Components of Scope 4 Emissions
Scope 4 is not a single category it includes several types of avoided emissions that describe different kinds of influence:
Avoided emissions
The most widely recognised category represents reductions achieved when a lower‑carbon product or service replaces a higher‑emission alternative.
Facilitated emissions
Avoided or increased emissions resulting from professional services that influence design outcomes—such as engineering, architecture or digital system design.
Advised emissions
Emissions associated with professional advice that affects client decisions—such as legal, financial or regulatory consulting.
Advertised emissions
Emissions avoided or increased as a result of marketing activity that changes consumer behaviour or product demand.
What Role Scope 4 Can Play in Your Carbon Reduction Strategy
Scope 4 emissions should be viewed as an additional insight, not a substitute for core sustainability reporting. The Greenhouse Gas Protocol and Science Based Targets initiative both emphasise that avoided emissions should not be included in progress toward near‑term reduction targets.
Where Scope 4 can add value is in:
- Informing product development
- Guiding policy or service design
- Showing how solutions contribute to wider system‑level decarbonisation.
How Scope 1, 2 and 3 Emissions Compare
Understanding Scope 4 begins with a strong grasp of standard GHG Protocol categories:
- Scope 1: Direct emissions from owned or controlled sources
- Scope 2: Indirect emissions from purchased electricity, heat, steam or cooling
- Scope 3: Indirect emissions occurring in the value chain, both upstream and downstream.
These scopes form the foundation of any credible carbon reduction plan and should be prioritised before assessing avoided emissions, as outlined in our sustainability reporting readiness checklist for organisations preparing robust, audit‑ready disclosures.
Why Organisations Report on Avoided Emissions
Although voluntary, reporting on avoided emissions can offer meaningful benefits:
- Demonstrates environmental contribution beyond operational boundaries
- Helps stakeholders understand the wider climate value of products or services
- Supports investor expectations for ESG transparency
- Identifies innovation opportunities within products, systems or service models
- Encourages insight into how customer behaviour is influenced or enabled.
Avoided emissions also provide additional context for evaluating long‑term decarbonisation pathways.
How to Measure Scope 4 Emissions
Measuring avoided emissions requires a clear methodology built from established frameworks such as the GHG Protocol or ISO 14069. Typical steps include:
- Identify relevant products or services that lead to emissions reductions
- Define a baseline scenario for comparison (e.g., conventional product or behaviour)
- Conduct life‑cycle assessments (LCA) or modelling
- Calculate total avoided emissions using transparent assumptions
- Verify methodologies to strengthen credibility
- Report findings clearly, including limitations, context and boundaries.
A consistent approach is essential, as avoided emissions vary significantly across sectors and use cases.
Avoided Emissions Versus Reduced Emissions
Avoided emissions reflect potential emissions that never occurred because of a low‑carbon alternative. Reduced emissions, by contrast, relate to actual, measurable decreases in an organisation’s own emissions over time.
Maintaining this distinction ensures transparency and avoids overstating climate progress.
Benefits of Reporting Scope 4 Emissions
Reporting avoided emissions can support:
- Reputation and credibility through transparent sustainability reporting
- Investor engagement, especially with climate‑focused funds
- Customer confidence in low‑carbon product offerings
- Innovation and R&D that accelerates low‑carbon solutions
- Better decision‑making on sustainable investments
- Stronger partnerships with suppliers aligned to climate goals.
These insights can complement mandatory reporting and help organisations shape future strategy.
Scope 4 Best Practice
Several approaches help ensure avoided emissions reporting is clear and reliable:
- Focus on Scopes 1–3 before expanding into Scope 4
- Build a robust baseline for comparisons
- Use life‑cycle assessments where relevant
- Conduct consumer or market behaviour analysis
- Implement structured monitoring methods
- Use credible modelling techniques
- Engage stakeholders early
- Report transparently, including underlying assumptions and boundaries.
Summary
Scope 4 emissions offer a way to understand how products, services or design choices contribute to wider emissions avoidance. While not part of mandatory reporting and not recognised within formal reduction targets, they can help organisations contextualise their broader climate role.
A strong foundation in Scopes 1 – 3 remains essential, with avoided emissions serving as an additional lens for innovation, strategy and insight.
Learn more about building a credible carbon reduction strategy here: Carbon reduction strategy services.
Written by Tim Holman – Head of Consultancy, MSc, MEng, CEng, MEI
Tim directs TEAM’s consultancy practice, applying 25+ years in strategy, audits, metering and compliance to deliver robust, audit‑ready results for customers.