Why “Net Zero” Accounting Is Facing a Rethink

Corporate climate reporting was supposed to make climate action measurable, transparent, and comparable. Instead, it may have created a system where some of the most meaningful climate interventions barely count at all.

For the past two decades, corporate decarbonisation has been built around greenhouse gas inventories — Scope 1, Scope 2, and Scope 3 emissions. These frameworks helped standardise reporting and gave investors, regulators, and the public a common language for climate accountability.

But a growing debate within the GHG accounting world is exposing a fundamental tension:

Are companies being measured for the emissions they are responsible for — or for the emissions reductions they actually help create?

Increasingly, experts argue those are two very different things.

The Limits of Traditional Carbon Accounting

Most corporate emissions reporting relies on what is known as allocational accounting.

The logic is straightforward:

• define organisational boundaries,

• estimate emissions within those boundaries, and

• allocate responsibility to the reporting entity.

This approach underpins virtually all modern corporate climate disclosures, including the GHG Protocol and Scope 1–3 accounting systems.

But while allocational accounting is useful for assigning responsibility, critics argue it struggles to recognise many forms of real-world climate action.

Take a company that:

• finances methane reduction technology at a supplier facility,

• pays a premium for low-emission materials,

• invests in carbon removal projects,

• supports renewable energy deployment outside its operations, or

• funds agricultural decarbonisation within its supply chain.

These activities may reduce atmospheric emissions in meaningful ways, yet many are only weakly reflected — or completely invisible — within traditional emissions inventories.

A Shift Toward “Consequential” Accounting

In response, GHG accounting experts are increasingly exploring a second approach known as consequential accounting.

Instead of asking:

What emissions belong to this company?

Consequential accounting asks:

What emissions changed because of this company’s actions?

It focuses on causality rather than ownership.

The distinction may sound academic, but it fundamentally changes how climate action is understood.

Under consequential accounting:

• financing a supplier transition matters,

• enabling low-carbon technology deployment matters,

• purchasing higher-cost low-emission products matters,

• and interventions beyond direct operational boundaries can be recognised as genuine mitigation contributions.

This thinking reflects a broader shift underway across climate governance: moving from narrow inventory management toward understanding how companies influence emissions across entire economic systems.

Why Scope 3 is Under Pressure

Nowhere is this tension more obvious than Scope 3 emissions.

Scope 3 was designed to capture emissions across a company’s value chain — often representing the vast majority of emissions for sectors like agriculture.

In theory, Scope 3 encourages companies to influence suppliers, customers, and downstream systems.

In practice, however, Scope 3 reporting often depends heavily on:

• spend-based estimates,

• generic emission factors,

• industry averages, and

• lifecycle assumptions.

The result is a system that can appear highly precise while remaining only loosely connected to actual mitigation outcomes.

A company might invest heavily in supplier decarbonisation and see little improvement in its inventory.

Meanwhile, emissions figures may fluctuate substantially simply because:

• procurement volumes changed,

• commodity prices shifted, or

• economic activity increased.

Critics argue this creates a dangerous misalignment:
companies may be being rewarded for accounting outcomes rather than climate outcomes.

The Growing Push to Separate “Responsibility” From “Contribution”

One of the most significant emerging ideas in GHG reporting is the notion that companies should separately disclose:

• emissions responsibility, and

• mitigation contribution.

Under this model:

• corporate inventories would still report operational and value chain emissions,

• but climate interventions outside those boundaries would be reported separately rather than being used to “offset” emissions.

This is part of a broader rethink of the role of “net zero” claims.

For years, many companies have combined:

• internal reductions,

• carbon credits,

• avoided emissions, and

• removals,

into a single headline figure.

But concerns over greenwashing, offset quality, and double counting have driven increasing scrutiny of this approach.

As a result, many experts now argue that external mitigation should not be used to erase inventory emissions on paper.

Instead, it should be recognised transparently as a separate contribution to global mitigation efforts.

That distinction may prove critical for restoring credibility to corporate climate claims.

Why This Debate Matters for Business

This isn’t just an accounting debate.

It could reshape how companies:

• set climate targets,

• prioritise investment,

• engage suppliers,

• report climate performance, and

• communicate net zero ambitions.

For sectors with massive Scope 3 footprints — especially agriculture, forestry, and food — the implications are enormous.

Many of the most important decarbonisation opportunities sit outside direct operational control.

If reporting systems fail to recognise those interventions properly, companies may become less willing to pursue them.

At the same time, poorly governed intervention accounting creates real risks:

• exaggerated claims,

• weak baselines,

• double counting,

• inconsistent methodologies, and

• opaque contribution claims.

Balancing credibility with flexibility is becoming one of the defining challenges of modern climate disclosure.

The Carbon Market Influence

This rethink is also being shaped by lessons from voluntary carbon markets.

Over the past several years, scrutiny of carbon credits has intensified around issues such as:

• additionality,

• permanence,

• leakage, and

• verification.

Those same concepts are now migrating into corporate intervention accounting.

Increasingly, there is recognition that if companies want to claim climate impact beyond their inventories, they must demonstrate:

• clear causality,

• robust baselines,

• transparent methodologies, and

• independently verifiable outcomes.

In other words, the era of vague climate contribution claims may be coming to an end.

The Future of Climate Reporting May Look Very Different

The future of corporate climate reporting may no longer revolve around a single number.

Instead, companies may increasingly be expected to report across multiple dimensions:

• what they emit,

• what they influence,

• what they finance,

• what they enable, and

• what mitigation outcomes they genuinely help create.

That would represent a profound shift away from the original philosophy of carbon accounting. But it may also bring reporting systems closer to the thing they were always meant to measure in the first place: real-world climate impact.

Because as climate scrutiny intensifies, one uncomfortable reality is becoming harder to avoid: A company can reduce its reported emissions without meaningfully reducing global emissions.

And equally, a company can drive substantial climate mitigation without that impact being visible in its inventory.

That contradiction is exactly why “net zero” accounting is now facing a rethink.