Carbon accounting could soon become more consistent worldwide following a new collaboration between the International Organization for Standardization (ISO) and the Greenhouse Gas (GHG) Protocol. The two organisations have announced plans to develop a single, unified global standard for greenhouse gas accounting, bringing together two of the most widely recognised frameworks used to measure and report emissions.
The initiative responds to growing demand for greater consistency in emissions reporting as organisations face increasing regulatory requirements, investor scrutiny and stakeholder expectations. While the new standard remains under development, the announcement signals an important step towards simplifying carbon accounting for businesses operating across global markets.
Why does a unified standard matter?
Today, organisations rely on a range of carbon accounting standards to calculate and disclose greenhouse gas emissions. Although ISO standards and the GHG Protocol share many common principles, differences in methodology and interpretation can create complexity for businesses reporting across multiple jurisdictions or supply chains.
By aligning their approaches, ISO and the GHG Protocol aim to reduce inconsistencies and improve the comparability of emissions data. A more harmonised approach to greenhouse gas accounting could also strengthen confidence in corporate disclosures and help organisations respond more effectively to evolving sustainability reporting requirements.
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What does this mean for businesses?
For most organisations, this announcement is unlikely to result in immediate changes to existing carbon accounting processes. Businesses already using recognised methodologies are expected to build on current practices rather than replace them entirely.
Instead, the collaboration highlights the growing importance of maintaining accurate, transparent and well-governed emissions data. As sustainability reporting continues to evolve, organisations with robust carbon accounting systems are likely to be better positioned to respond to regulatory developments, support decarbonisation planning and communicate progress with greater confidence.
The announcement also reinforces the value of integrating carbon accounting into broader business decision-making, helping organisations identify emissions hotspots, manage climate-related risks and uncover opportunities for operational improvement.
Looking ahead
Developing a unified global standard will take time, with both organisations expected to engage businesses, technical experts and other stakeholders throughout the process.
Although the final framework has yet to be published, the collaboration signals a clear direction for the future of carbon accounting. Greater alignment between internationally recognised standards has the potential to reduce complexity while improving the quality and consistency of emissions reporting across industries.
Conclusion
The partnership between ISO and the GHG Protocol reflects the continued evolution of carbon accounting as organisations seek more reliable and consistent ways to measure greenhouse gas emissions.
For businesses, the announcement reinforces the strategic importance of high-quality carbon accounting. Reliable emissions data supports transparent reporting, informs decarbonisation strategies and enables more confident decision-making as regulatory expectations and stakeholder demands continue to evolve.
Dedicated to harnessing the power of storytelling to raise awareness, demystify, and drive behavioural change, Bronagh works as the Communications & Content Manager at the Institute of Sustainability Studies. Alongside her work with ISS, Bronagh contributes articles to several news media publications on sustainability and mental health.
