SDAI Insights
Product carbon footprints are becoming exchangeable data
The product carbon footprint is becoming more than a number in a report. It is becoming a structured data object that can move between suppliers, customers and software systems without losing the context needed to interpret it.
Event date
Thesis
The product carbon footprint is becoming more than a number in a report. It is becoming a structured data object that can move between suppliers, customers and software systems without losing the context needed to interpret it. For Scope 3 work, that shift may matter more than another reporting dashboard.
What changed
On June 2, 2026, WBCSD published a resource page for PACT Methodology Version 3. PACT's own methodology resource notes that Version 3 was originally released on April 30, 2025 and is the version to use for new product carbon footprint calculations. The current V3 framework expands or strengthens guidance for product-level carbon accounting in areas including land-sector emissions and removals, electricity accounting, technological carbon capture, utilisation and storage, service businesses, verification and data reliability. It also works alongside PACT technical specifications for interoperable exchange of product carbon footprint data. The important development is the combination of accounting guidance with a structured data-exchange model and the growing operational use of that model across supply chains.
Analysis
The hardest part of supply-chain carbon accounting is often not multiplying activity data by emission factors. It is getting comparable information from many companies while preserving enough context to know whether the numbers can be combined. A PCF is much more useful when it travels with its identity and method information. A receiving company should be able to tell what product the value refers to, the functional basis, time period, geography, primary-data share, methodology, allocation choices, electricity treatment and verification status. Without that context, a supplier-specific number can be more precise than a generic factor and still be difficult to use correctly.
Engineering implications
LCA software increasingly needs to behave like a data system as well as a calculator. A useful exchange object should answer, at minimum: - What product and reference flow does this footprint describe? - What geography and reporting period apply? - Which inputs come from primary data? - Which method and version were used? - How were allocation, electricity and removals handled? - What data-quality or verification information accompanies the result? Those fields are part of the result, not optional metadata.
What to watch next
LCAgo should use open, interoperable PCF exchange as a design target rather than create a proprietary footprint format. That would allow supplier footprints to be imported, checked, linked into a product system and exported again while preserving their original context. The value is not lock-in; it is continuity of information across tools and companies.
Primary source
WBCSD's PACT Methodology Version 3 resource page is dated June 2, 2026. PACT's dedicated methodology resource states that V3 was originally released April 30, 2025 and was last updated in December 2025, and that V3 should be used for new PCF calculations. This Insight therefore treats June 2, 2026 as the WBCSD publication/resource event, not the first release date of the underlying methodology. PACT provides methodology and technical specifications; it is not itself an LCA software platform.
WBCSD, PACT Methodology Version 3Related work
See the research and case studies behind SDAI's technical analysis.