Understanding Avoided Emissions: Why Credible Climate Impact Claims Matter

As organisations accelerate their sustainability strategies, the conversation is expanding beyond reducing their own greenhouse gas (GHG) emissions. Increasingly, businesses are also being asked to demonstrate how their products and services help others reduce emissions. This is where avoided emissions are becoming an increasingly important part of ESG.

Avoided emissions measure the greenhouse gas reductions that occur because a particular product or service exists, compared with the most likely alternative. They represent the positive climate impact an organisation enables through its products or services rather than the emissions generated by its own operations.

This distinction is important. A company's GHG inventory measures the emissions it produces across Scope 1, Scope 2 and Scope 3. Avoided emissions, by contrast, measure the emissions that customers or other users avoid because they adopt a lower-carbon solution. They are sometimes referred to informally as "Scope 4" emissions, although this is not an official category under the Greenhouse Gas Protocol.

For South African businesses, this discussion is becoming increasingly relevant.

As the country transitions towards a lower-carbon economy, organisations are investing in renewable energy, energy efficiency, cleaner manufacturing processes, electric mobility, digital optimisation and more sustainable infrastructure. Investors, lenders and customers increasingly want to understand not only how businesses are reducing their own environmental footprint, but also how they contribute to reducing emissions across the wider economy.

Avoided emissions provide a way to demonstrate that contribution, but only when supported by robust methodology and transparent reporting.

Calculating avoided emissions is considerably more complex than many organisations realise. Credible claims depend on sound methodologies, transparent assumptions and realistic comparisons rather than optimistic estimates or marketing narratives.

The starting point is establishing an appropriate baseline. This represents the emissions that would most likely have occurred if the product or service did not exist. Importantly, the baseline should reflect the most realistic alternative, not the highest-emitting scenario available. Selecting an unrealistic comparison can significantly overstate avoided emissions and increase the risk of greenwashing.

The analysis must also define a clear functional unit. Rather than measuring a product in isolation, organisations assess the value it delivers, such as one megawatt hour of electricity generated, one tonne of material produced or one kilometre of transport provided. Comparing equivalent outcomes ensures that the assessment remains meaningful and technically robust.

Once the baseline has been established, organisations calculate the emissions associated with their own product or service across its relevant lifecycle. Depending on the product, this may include manufacturing, operation, maintenance and end-of-life considerations. Avoided emissions are then determined by calculating the difference between the baseline emissions and the product's emissions, multiplied by the volume of products or services delivered.

While the principle appears straightforward, the quality of the outcome depends entirely on the quality of the underlying assumptions.

As South Africa's electricity grid continues to evolve, renewable energy capacity expands and cleaner technologies become more widely adopted, historical baselines may no longer remain appropriate. Organisations should therefore review avoided emissions calculations regularly to ensure they continue to reflect current market conditions rather than overstating climate benefits.

Transparency is equally important.

Organisations should clearly explain the methodology used, the baseline selected, the system boundaries applied and the assumptions that influence the calculation. Avoided emissions inevitably involve uncertainty, making it good practice to disclose confidence ranges or sensitivity analyses rather than presenting a single definitive figure.

Another important consideration is attribution.

Many emissions reductions result from collaboration across complex value chains involving manufacturers, technology providers, financiers, infrastructure operators and customers. Organisations therefore need to explain how they have allocated avoided emissions and identify any potential overlap with claims made by other parties. Without this transparency, the risk of double-counting increases significantly.

It is also essential to recognise what avoided emissions do not represent.

They are not a substitute for reducing an organisation's own carbon footprint. Businesses remain responsible for managing and reducing their Scope 1, Scope 2 and Scope 3 emissions in line with recognised climate targets. Avoided emissions should always be reported separately from a company's own greenhouse gas inventory to prevent confusion and maintain credibility.

For many South African organisations, avoided emissions are becoming increasingly relevant to strategic decision-making.

They can help identify which products deliver the greatest climate benefit, inform investment decisions, strengthen sustainability reporting and demonstrate the commercial value of low-carbon innovation. They may also support organisations seeking green finance, sustainability-linked funding or investment from institutions that increasingly assess climate-related opportunities alongside climate-related risks.

This aligns with broader developments in South Africa's sustainable finance landscape. The South African Green Finance Taxonomy, together with evolving international reporting frameworks and growing investor expectations, is encouraging organisations to move beyond broad sustainability commitments towards measurable, evidence-based disclosures. Although avoided emissions remain distinct from taxonomy alignment, both rely on transparent methodologies, credible data and strong governance.

At the same time, organisations should approach avoided emissions claims with appropriate caution.

Weak methodologies, selective reporting, outdated baselines or unrealistic assumptions can expose businesses to reputational damage, regulatory scrutiny and allegations of greenwashing. As sustainability reporting matures, investors, auditors and regulators are placing increasing emphasis on evidence-based environmental claims supported by recognised methodologies and appropriate assurance.

Boards and executive leadership teams should therefore begin by assessing organisational readiness.