The Greenhouse Gas (GHG) Protocol is the world’s most widely used framework for corporate greenhouse gas accounting. It provides consistent rules for measuring, reporting, and managing emissions across organisations, value chains, and products. The core of this framework is the Corporate Accounting and Reporting Standard, which sets requirements for building a corporate-level emissions inventory and covers the seven Kyoto gases, with supporting standards for Scope 2 and Scope 3 disclosures.
For UK organisations, the GHG Protocol is not simply a voluntary sustainability reference. It also aligns closely with national expectations for credible emissions reporting. The UK’s environmental reporting guidelines underpinning Streamlined Energy and Carbon Reporting (SECR) draw on the principles of the GHG Protocol Corporate Standard, emphasising relevance, accuracy, completeness, consistency, comparability, and transparency.
What are Scope 1, Scope 2, and Scope 3 emissions?
Under the GHG Protocol, emissions are grouped into three categories:
- Scope 1: direct emissions from owned or controlled sources.
- Scope 2: indirect emissions from the generation of purchased energy.
- Scope 3: all other indirect emissions that occur across the value chain, both upstream and downstream.
This structure helps UK businesses prioritise action, especially where Scope 3 may represent the largest share of total emissions for logistics, manufacturing, retail, and services.
What is the GHG Protocol, and why does it matter?
The GHG Protocol offers a structured method to quantify an organisation’s emissions in a way that investors, regulators, customers, and assurance providers can understand and compare over time. It is designed to reduce the cost and complexity of carbon accounting while improving consistency across sectors.
For iCOR users, this framework helps in structuring reporting practices where organisations can define their boundaries, track evidence, and maintain an audit-ready record across reporting years, directly supporting obligations such as the Streamlined Energy and Carbon Reporting (SECR).
How should companies approach Scope 3 reporting?
The Corporate Value Chain (Scope 3) Standard enables organisations to account for emissions across 15 categories of value chain activity.
In practice, a proportionate approach works best: start with a screening assessment, identify high-impact categories (often purchased goods, transport, and use of sold products), and then improve data quality over time using supplier engagement and verified activity data. The GHG Protocol also provides calculation guidance to support method selection and data hierarchy.
What is dual reporting for Scope 2, and is anything changing?
The Scope 2 Guidance introduced a dual reporting expectation using both location-based and market-based methods to increase transparency around electricity emissions accounting.
Notably, the GHG Protocol has an active process to update Scope 2 rules. Proposed revisions have moved into public consultation, with an emphasis on improving accuracy and comparability while keeping the overall reporting structure recognisable. Organisations with material electricity consumption should monitor these developments to ensure future inventories remain aligned with evolving best practice.
How does the GHG Protocol support UK reporting and assurance?
For many UK companies in the scope of SECR, the GHG Protocol provides the methodological backbone for defensible Scope 1 and Scope 2 inventories and supports credible voluntary expansion into Scope 3. The UK’s environmental reporting guidance explicitly links its reporting principles to the GHG Protocol Corporate Standard, reinforcing its relevance for UK corporate disclosures.
From a governance perspective, assurance readiness increasingly depends on clear boundaries, consistent base years, robust emission factors, and a traceable audit trail. iCOR can support this by linking legal requirements, operational data capture, evidence uploads, and reporting outputs in one place, reducing the risk of fragmented spreadsheets and inconsistent methodology statements.