ISO 14025:2026 Explained for Environmental Product Declarations
Key Changes and Practical Implications for EPD Development
Abstract
After nearly twenty years, the International Organization for Standardization (ISO) has published the second edition of ISO 14025, replacing the 2006 edition that established the global framework for Type III environmental declarations. During the past two decades, Environmental Product Declarations (EPDs) have evolved from a relatively niche communication tool into an internationally recognized mechanism for reporting product environmental performance across construction, manufacturing, chemicals, consumer goods, and many other sectors.
The publication of ISO 14025:2026 reflects this evolution. Rather than fundamentally changing the principles of Life Cycle Assessment (LCA), the revised standard modernizes the framework supporting EPDs by strengthening harmonization across programmes, recognizing digital EPD tools, aligning terminology with current industry practice, and providing greater clarity regarding governance, verification, and the communication of sustainability-related information.
This article provides a technical overview of the most significant revisions introduced in ISO 14025:2026 and discusses their practical implications for manufacturers, LCA practitioners, EPD verifiers, programme operators, and software developers. Rather than summarizing the standard clause-by-clause, the objective is to explain why these changes matter and how organizations should begin preparing for their implementation.
Why was ISO 14025 revised?
When ISO 14025 was first published in 2006, Environmental Product Declarations (EPDs) were still emerging as a voluntary mechanism for communicating life cycle environmental performance. Since then, the global sustainability landscape has changed considerably. EPDs have become central to green building certification systems, sustainable procurement, carbon reporting, and product transparency initiatives. At the same time, the number of programme operators, Product Category Rules (PCRs), digital LCA platforms, and EPD software solutions has expanded rapidly.
The revision recognizes this evolution. Rather than replacing the existing framework, ISO 14025:2026 builds upon nearly two decades of practical experience by improving consistency, harmonization, and usability across the international EPD ecosystem. The revised standard also aligns with recent developments within the ISO 14020 family of standards and acknowledges the increasing role of digital technologies in developing, verifying, and communicating EPDs.
Key Differences Introduced in ISO 14025:2026
1. Environmental Product Declarations (EPDs) become the preferred terminology
One of the most visible changes introduced in ISO 14025:2026 is the transition away from the historical "Type III environmental declaration" terminology in favour of the now universally recognized term Environmental Product Declaration (EPD). While this may initially appear to be a simple editorial revision, it reflects a broader evolution in how ISO organizes and communicates environmental information. You may see older Type II self-declared claim labelled as EPDs however, in the new standard, this would not be compliant.
The original Type I, Type II, and Type III classification system was developed to distinguish different approaches to environmental communication. Under this framework, Type I referred to ecolabels (ISO 14024), Type II referred to self-declared environmental claims (ISO 14021), and Type III referred to quantified environmental declarations based on Life Cycle Assessment (ISO 14025).
Over the past two decades, however, the term Environmental Product Declaration (EPD) has become the universally recognized language used by manufacturers, programme operators, regulators, green building schemes, and procurement organizations. In practice, industry has increasingly referred to these declarations simply as EPDs, rather than specifying their type.
Recognizing this evolution, ISO 14025:2026, together with the revised ISO 14020 family of standards, no longer promotes the historical Type I–II–III terminology as the preferred way of describing environmental statements. Instead, the revised framework identifies EPDs as a distinct category of environmental statement developed in accordance with ISO 14025 and supported by independently verified LCA and EPD results. At the same time, it reinforces that self-declared environmental claims (ISO 14021) and ecolabels (ISO 14024) remain separate forms of environmental communication and should not be interpreted as Environmental Product Declarations or variants of an EPD.
This clarification represents more than a change in terminology. It reinforces that an EPD is distinguished not by its historical classification as a "Type III" declaration, but by its methodological foundation: transparent, life cycle-based environmental information developed according to internationally harmonized requirements and independently verified through an established programme.
Why it matters
For most organizations, this revision will not require changes to LCA methodology or EPD development. However, it does require a shift in how organizations communicate and describe environmental declarations. Technical reports, marketing materials, General Programme Instructions, internal procedures, training materials, and procurement documents should gradually adopt the terminology used throughout ISO 14025:2026.
More importantly, this revision reflects the maturation of the global EPD ecosystem. Rather than defining environmental communication through a numerical classification system developed decades ago, ISO now emphasizes the characteristics that make an EPD scientifically credible: independently verified, transparent reporting, and internationally harmonized requirements.
Build Neutral Interpretation
Although many readers may view this as a simple terminology update, the revision represents a broader conceptual shift. ISO is moving away from describing environmental declarations according to historical "Type" classifications and instead focusing on the nature and quality of the environmental information being communicated. In practice, this strengthens the identity of EPDs as rigorous, independently verified, life cycle-based environmental statements while clearly distinguishing them from self-declared claims and ecolabel programmes that serve different purposes within the ISO 14020 family of standards.
2. Harmonization Becomes a Central Theme
One of the most significant strategic developments in ISO 14025:2026 is the increased emphasis on harmonization across the global EPD system. While previous editions recognized the importance of consistency, the revised standard more explicitly integrates ISO/TS 14027 (Product Category Rules) and ISO/TS 14029 (Mutual Recognition), reinforcing the need for greater alignment among programme operators, Product Category Rules (PCRs), and verification processes.
As the global use of EPDs has expanded, so too has the number of programme operators and PCRs. Although all EPDs are founded on the principles of LCA, differences in PCR requirements; data quality expectations, reporting formats, allocation procedures, and programme-specific guidance have sometimes limited the comparability and international acceptance of EPDs. In practice, manufacturers operating in multiple regions have often been required to develop separate EPDs for different markets despite evaluating the same product.
ISO 14025:2026 acknowledges that methodological consistency alone is not sufficient to achieve meaningful comparability. Harmonization also depends on greater alignment in PCR development, programme governance, verification procedures, and mutual recognition between EPD programmes. By formally incorporating ISO/TS 14027 and ISO/TS 14029 into the framework, the revised standard establishes a stronger foundation for improving consistency across the international EPD ecosystem.
Why it Matters
Greater harmonization has the potential to reduce duplication, improve transparency, and increase confidence in EPDs across international markets. For manufacturers, this may ultimately reduce the administrative burden associated with developing multiple EPDs for different programme operators. For programme operators and PCR developers, the revision reinforces the importance of developing consistent PCRs that facilitate comparability while maintaining scientific rigour. For LCA practitioners and EPD verifiers, increased harmonization provides a clearer framework for producing declarations that are more readily accepted across jurisdictions and programmes.
Build Neutral Interpretation
The incorporation of ISO/TS 14027 and ISO/TS 14029 signals that ISO views harmonization as essential to the future credibility and scalability of EPDs. As demand for verified environmental information continues to grow globally, the value of an EPD will increasingly depend not only on the quality of the underlying LCA but also on the degree to which its methodology, verification, and programme governance are internationally consistent. Although complete harmonization across all programme operators remains an ongoing challenge, ISO 14025:2026 represents an important step toward a more interoperable and globally recognized EPD framework.
3. Recognition of Digital EPD tools
Perhaps the most forward-looking addition within ISO 14025:2026 is the formal recognition of EPD tools.
Since the publication of the first edition, software platforms capable of automating LCA calculations and EPD generation have become increasingly common. The revised standard acknowledges this transformation by introducing terminology and requirements relating to these digital systems.
Why it matters
The inclusion of EPD tools signals ISO's recognition that digitalization will continue transforming EPD development. Software developers, programme operators, and verification bodies should expect increasing emphasis on transparency, traceability, and governance of automated workflows.
4. Prospective EPD Types Introduce Greater Flexibility
One of the most significant technical additions in ISO 14025:2026 is the formal introduction of requirements for prospective EPD types. Although prospective EPDs have been defined before in General Programme Instructions and have been utilized by Programme Operators historically. Unlike the 2006 edition, which focused primarily on EPDs developed from representative production data, the revised standard recognizes that programme operators may choose to allow prospective EPDs for products at different stages of commercialization.
The specific guidance regarding a prospective EPD with data developed by using ‘data from a similar EPD or inventory data for comparable technologies existing on the market (e.g. data from other manufacturers) or forecast/design data of a manufacturing plant to complement the lack of primary data’ is a major benefit for companies that are requiring EPDs for funding and procurement opportunities that could not previously reach the data benchmarks for EPD eligibility.
This addition acknowledges an important challenge facing manufacturers of innovative products. In rapidly evolving sectors such as advanced manufacturing, construction materials, clean energy technologies, and emerging chemicals, organizations often require credible environmental information before a product has accumulated sufficient operational data to support a conventional EPD. Waiting until a full year of representative production data is available may delay product launches, procurement decisions, sustainability reporting, and market adoption.
Why it Matters
The introduction of prospective EPD types represents an important evolution in how EPDs can support product innovation. Manufacturers may now have a pathway to communicate anticipated environmental performance earlier in the product development cycle, provided the programme operator permits prospective EPDs and the associated assumptions, data sources, limitations, and uncertainties are appropriately documented and independently verified.
For programme operators, this revision introduces new responsibilities for defining acceptable prospective EPD types, establishing data quality requirements, and ensuring users clearly understand the maturity of the information presented. Similarly, LCA practitioners and EPD verifiers will need to exercise additional professional judgment when evaluating data representativeness, assumptions, uncertainty, and the appropriateness of prospective modelling approaches.
Build Neutral Interpretation
The introduction of prospective EPD types reflects the growing need for environmental information to support innovation rather than simply document historical production. By recognizing that environmental performance may need to be communicated before products reach full commercial maturity, ISO 14025:2026 extends the practical application of EPDs while maintaining transparency regarding data quality and uncertainty. If implemented carefully by programme operators, prospective EPDs have the potential to accelerate sustainable product development and informed decision-making without compromising the scientific credibility that underpins the EPD framework.
Conclusions
ISO 14025:2026 represents a thoughtful modernization of the international framework governing EPDs. Rather than fundamentally changing how LCA is conducted, the revised standard responds to the rapid growth of the global EPD ecosystem by improving terminology, strengthening harmonization, recognizing digital innovation, and reinforcing programme governance.
Perhaps the most significant message conveyed by the revised standard is that EPDs are no longer niche sustainability documents. They have become essential tools for transparent environmental communication within an increasingly digital, internationally connected marketplace.
For manufacturers, practitioners, verifiers, and programme operators alike, early familiarity with the revised requirements will facilitate a smoother transition as programme operators progressively implement ISO 14025:2026. Organizations that proactively understand these changes will be well positioned to maintain credible, internationally comparable EPDs while contributing to greater consistency and confidence across the global EPD ecosystem.
About Build Neutral
Build Neutral Inc. is a Canadian research and sustainability firm specializing in Life Cycle Assessment (LCA), Environmental Product Declaration (EPD) development, Product Carbon Footprints (PCFs), embodied carbon assessments, critical review, verification readiness, and environmental standards implementation. Through the Build Neutral Standards Insight series, we provide technical interpretations of evolving international standards to support manufacturers, programme operators, practitioners, and decision-makers in implementing scientifically robust and internationally recognized sustainability practices.
Disclaimer: This article is an independent technical commentary prepared by Build Neutral. It is intended to summarize and interpret selected aspects of ISO 14025:2026 and shall not be considered a substitute for the official standard. Readers should consult the official ISO publication for the complete normative requirements.