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ARTICLE · 04 AUGUST 2026

GHG Protocol Announces ISO Partnership To Develop Unified Carbon Accounting Standards

ISO and the Greenhouse Gas Protocol have announced a strategic partnership to harmonize their greenhouse gas accounting standards into unified, co-branded frameworks. This consolidation promises to streamline corporate emissions reporting, reduce duplicative work, and improve comparability across global disclosure requirements. Companies should monitor the development process closely as the changes could significantly impact inventory calculations, emissions targets, and climate-related claims substantiatio

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Update

On July 29, 2026, the GHG Protocol announced that it and ISO will consolidate their corporate-level GHG accounting standards into a single, harmonized, co-branded global standard. This development promises to simplify and reduce costs for companies reporting emissions under frameworks that may currently require or prioritize use of one of these standards over the other.

The consolidated Corporate Accounting and Reporting Standard Version 3.0 (final title to be determined with ISO) is expected to integrate the GHG Protocol’s Corporate Standard, Scope 2 Guidance, Scope 3 Standard, and developing Actions and Market Instruments (AMI) framework with ISO 14064-1. A two-part standard is envisioned: Part 1 will cover general requirements and the physical GHG inventory; Part 2 will cover AMI. An integrated public consultation on the complete draft is planned for the second quarter of 2027. The accompanying Standard Development Plan now estimates final publication in the fourth

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