What The GHG Protocol Scope 3 Revisions Mean For Businesses And Software Providers

In March 2026, the GHG Protocol released its Phase 1 Progress Update on the revision of the Scope 3 Standard, the first substantive overhaul since 2011. Developed by a 65-member Technical Working Group, the draft covers three revision series: data quality, boundary setting and investment classification. While formal public consultation is yet to happen, there are several changes that businesses and software vendors should be aware of:

• 95% threshold in boundary setting, forcing near-complete Scope 3 coverage.
• Mandatory disaggregation by data type (for example, primary activity data, spend-based, industry-based).
• Annual data quality improvement targets.

The most consequential shift is the proposed 95% inclusion threshold, requiring organizations to quantify all required Scope 3 sources before excluding any, and to disclose and justify every exclusion. For firms that have historically reported a selective subset of categories, systematic value chain mapping and documented materiality decisions will now be required.

The requirement to disaggregate emissions by data type adds a further layer of scrutiny. Once the proportion of spend-based estimates is visible in a standardized format, it becomes a de facto measure of reporting credibility. Combined with new recommendations to set annual data quality improvement targets, this reframes Scope 3 as a multi-year operational programme, not an annual disclosure exercise.

Also significant is the proposed addition of Category 16 for other value chain activities, including facilitated emissions: those generated by third-party activities from which the reporting organization earns direct transactional income but does not own. While the majority of Category 16 subcategories are optional, firms with licensing, franchising or platform-based business models will need to assess for the first time whether these activities fall within their reporting boundary.

For financial institutions, the revised Category 15 boundary now requires inclusion of investee Scope 3 emissions, which were previously optional. For banks and asset managers already navigating PCAF alignment, this is a material expansion, and one that is contingent on investee organizations themselves having credible Scope 3 disclosures.

As businesses shift from manual carbon accounting to software-enabled use cases, these revisions raise the baseline for what platforms must deliver. Audit-ready disaggregation by data type and longitudinal tracking of data quality improvements might become table stakes. At the same time, parallel Scope 2 revisions – particularly around more granular hourly and location matching of renewable energy certificates – mean platforms’ architecture becomes critical: modular, flexible systems will adapt faster than those built on hardcoded logic.

If you want to learn more about the carbon management software landscape, and how Scope 3 capabilities are evolving in the market, check out the 2026 Verdantix Green Quadrant.