Written by Graham Paul – Service Delivery Director
With over twenty years of experience in the energy sector, Graham leads service delivery, sales and marketing to enhance customer experience and scale TEAM’s carbon and energy services with a data‑driven, outcomes focus.
The Department for Energy Security and Net Zero (DESNZ) has published the latest UK Government conversion factors for company reporting of greenhouse gas emissions. These annually updated factors play a central role in carbon accounting and carbon management, enabling organisations to calculate and report emissions in a consistent and credible way.
What Does This Announcement Mean?
DESNZ has released the 2026 conversion factors dataset, providing updated activity-based emissions factors covering Scope 1, Scope 2 and Scope 3 emissions. The guidance confirms the factors are suitable for organisations of all sizes operating in the UK, as well as international organisations reporting UK-based emissions.
The update also reinforces their relevance to established reporting frameworks, including the Environmental Reporting Guidelines and Streamlined Energy and Carbon Reporting (SECR) regulations. As such, the publication remains a key annual milestone for organisations managing their regulatory and voluntary disclosures.
Conversion Factors Explained
Conversion factors are standardised values used in carbon accounting to convert operational data, such as energy use, fuel consumption or travel, into carbon dioxide equivalent (CO₂e) emissions. Rather than measuring emissions directly, organisations apply these factors to activity data to estimate their environmental impact.
They cover all major emissions sources, including direct fuel use, purchased electricity and indirect activities across the value chain. By providing a single, government-backed dataset, DESNZ ensures consistency in how emissions are measured and reported across sectors.
How Can This Data be Used?
In practice, the conversion factors sit at the heart of organisational emissions reporting. Businesses use them to translate raw activity data into a full carbon footprint, which can then be disclosed through SECR, ESG reporting, or internal sustainability reporting.
How the Emissions Data Can Help Organisations
Using the DESNZ conversion factors is a straightforward but structured process within carbon accounting. Organisations begin by collecting activity data across their operations, such as electricity consumption, fuel use, travel distances or waste volumes. This data is then matched with the appropriate conversion factor from the DESNZ dataset.
Once applied, the calculation converts operational activity into emissions, which can be aggregated across Scope 1, 2 and 3 to produce a complete carbon footprint. The results are then used within businesses for reporting, compliance and decision-making. Accuracy depends on selecting the most relevant factors and keeping calculations aligned with the latest annual update.
Supporting Accurate Carbon Reporting and Reduction Planning
The conversion factors underpin both the measurement and management of emissions. From a carbon accounting perspective, they provide a recognised and consistent methodology that supports compliance with SECR and other reporting frameworks. This consistency is critical for ensuring emissions data is comparable across reporting periods and between organisations.
From a carbon management perspective, the factors enable more informed decision-making. By turning operational data into insights into business emissions, organisations can identify the most carbon-intensive activities within their operations, prioritise reduction initiatives, and track progress towards net zero targets. Without accurate and up-to-date factors, both reporting integrity and reduction planning would be significantly weakened.
What Has Changed in the 2026 Update?
Each annual update reflects the latest available data and methodological improvements. For 2026, changes are likely to include updates to emissions factors for electricity, fuels, transport and other activities, ensuring calculations reflect current conditions such as grid decarbonisation and evolving fuel mixes.
In particular, any updates to UK electricity factors can have a notable impact on Scope 2 emissions reporting, while revisions to travel and supply chain factors may affect Scope 3 calculations. Organisations should review these changes carefully, as they may influence year-on-year comparisons and reported performance.
Where to Access This Data
The 2026 conversion factors are available via the official UK Government (DESNZ) publication page titled “UK Government greenhouse gas conversion factors for company reporting.” The release typically includes detailed data tables alongside supporting methodology documents.
What This Means for Organisations
This latest release highlights the ongoing importance of maintaining a robust approach to carbon accounting and carbon management. Organisations should update their emissions calculations using the new factors, assess the impact on reported figures, and ensure alignment with Government frameworks like SECR and broader sustainability reporting.
The update enables businesses to use the most current data available to gain credible emissions reporting. This is particularly important as scrutiny around net zero commitments and ESG disclosures continues to grow, keeping carbon calculations accurate and up to date is essential for both compliance and reputation.
To understand the importance of Carbon Accounting and Carbon Management in a business’ emissions reduction plan, please read our online guide: Carbon Accounting vs Carbon Management vs Carbon Reporting Software: What Is the Difference?