The ISO 14064 series of standards is among the world’s most important standards for climate management. It was developed to provide organizations with a consistent and transparent methodology for quantifying, calculating, and reporting greenhouse gas emissions and reductions. This creates a common language for climate data that can be applied across a wide range of industries and regions.
Compared to purely national regulations or voluntary initiatives, ISO 14064 offers significant advantages:
Globally applicable: The standard provides a consistent foundation for companies with international locations and complex supply chains.
Verifiable: The standard is designed to allow for external audits and certifications—a key advantage for credibility in regulatory reports such as CSRD/ESRS.
For companies, this means that ISO 14064 ensures that data is not only useful internally but also robust and comparable externally—a key consideration in an era of increasing regulatory requirements and investor scrutiny.
Structure of the ISO 14064 series of standards
The ISO 14064 series of standards consists of three parts that together form a comprehensive system:
ISO 14064-1
Governs the quantification and reporting of greenhouse gas emissions at the organizational level. It serves as the basis for preparing a Corporate Carbon Footprint (CCF) assessment and covers Scopes 1, 2, and 3.
→ In practice: A company tracks emissions from its own production, purchased energy, and the supply chain in order to develop robust reduction strategies and climate goals.
ISO 14064-2
Focuses on projects aimed at reducing or avoiding emissions. This includes both technical measures, such as energy efficiency programs, and nature-based solutions, such as reforestation.
→ In practice: An energy supplier can document and verify the emissions reductions achieved through a wind power project.
ISO 14064-3
Sets requirements for the validation and verification of greenhouse gas inventories and projects.
→ Practice: Companies have their financial statements audited by independent third parties to ensure they meet audit standards and to build confidence in the capital markets.
By dividing the standards into these three categories, the series covers both internal data collection and processing as well as external validation through audits—a clear advantage over fragmented approaches.
ISO 14064 – Overview of the three parts of the standard
Why is ISO 14064 important?
The relevance of ISO 14064 extends far beyond mere emissions accounting. The standard serves as a strategic tool that companies can use to structure their overall climate management:
Strategic Management: Accurate data forms the basis for robust reduction targets, SBTi validations, and the development of transformation plans.
Reliability & Comparability: Consistent methods prevent results from being skewed across locations or reporting periods—a must for credible sustainability reports.
Compliance & Reporting: ISO 14064 facilitates compliance with legal reporting requirements (e.g., CSRD/ESRS, EU Taxonomy) and ensures alignment with global initiatives.
Verification & Certification: ISO 14064-3 allows emissions data to be independently verified. This enhances credibility with customers, investors, and regulatory authorities.
Funding Programs & Labels: Many funding agencies and sustainability labels require ISO-compliant carbon footprint assessments as a prerequisite.
ISO 14064 thus provides added value on three levels: internally for management and efficiency, externally for communication and trust, and in terms of regulatory compliance.
Use Cases & Examples
The range of applications is wide and diverse, spanning industries, the energy sector, and public institutions:
Industry & Manufacturing: Tracking direct Scope 1 emissions (e.g., from combustion processes and chemical plants) and integrating them into cross-site climate strategies.
Energy suppliers: Calculating emission reductions from projects such as solar farms or hydrogen initiatives—often a key factor in funding programs.
Services sector: Comprehensive accounting of Scope 2 emissions (electricity, heating, cooling) and Scope 3 emissions (business travel, purchased services).
Municipalities & Public Institutions: ISO-compliant reports help with applying for grants and developing long-term climate neutrality goals.
Example: A medium-sized mechanical engineering company prepares its carbon footprint in accordance with ISO 14064-1, has it verified in accordance with ISO 14064-3, and communicates the results to customers and banks. In doing so, it not only strengthens its market position but also meets the requirements of the CSRD.
Challenges & Limitations
Although ISO 14064 offers many benefits, there are some common challenges when implementing it:
Data availability: Primary data is often lacking, particularly for Scope 3 emissions. Companies frequently have to rely on estimates or secondary databases.
Complexity: The standard requires methodological expertise, particularly with regard to demarcations, allocations, and calculation logic.
Costs & Resources: Implementation and external verification require financial and human resources.
Adapting to changing conditions: Standards and emission factors continue to evolve; companies must regularly update their approaches to stay current.
ISO 14064 vs. GHG Protocol – Which Framework for Corporate Reporting?
In practice, many companies face the question: Should we base our carbon footprint calculations on ISO 14064 or on the GHG Protocol? The answer is: It’s not so much a matter of “either/or” as it is of “both/and.”
The GHG Protocol is the most widely used standard for corporate emissions reporting worldwide. It defines Scopes 1, 2, and 3, provides comprehensive guidelines, and serves as the foundation for regulatory frameworks such as the CSRD/ESRS and initiatives such as the SBTi.
The ISO 14064 series of standards is closely based on the principles of the GHG Protocol, but goes a step further: it places great emphasis on verifiability and auditability. ISO 14064-3 is particularly crucial in this regard, as it establishes a verifiable foundation for certifications and external ratings. Companies seeking to establish high credibility with investors, banks, and rating agencies benefit from this added assurance.
Personal assessment: The GHG Protocol should always be considered and integrated into the methodological framework—it is the backbone of global climate reporting. ISO 14064 complements this with a clear focus on verifiability and international comparability. ISO 14064 is an indispensable add-on, particularly for companies seeking to improve their sustainability performance in ratings, access funding, or achieve certified climate neutrality.
Practical Tips for Businesses
Anyone wishing to successfully implement ISO 14064 should keep a few basic principles in mind:
Define scope and objectives: Clearly specify whether the focus is on a company-wide assessment (ISO 14064-1), a project (ISO 14064-2), or an external verification (ISO 14064-3).
Establish data management: Systematically collect, review, and document activity and consumption data—ideally with digital support.
Leveraging synergies: ISO 14064 can be combined with the GHG Protocol and ISO 14067 (Product Carbon Footprint) to cover both corporate and product perspectives.
Plan for verification early on: Involve external auditors in a timely manner to avoid delays or additional work later on.
Maintain transparency: Don’t just present results as raw data; disclose assumptions, limitations, and uncertainties.
This makes ISO 14064 not just a tool for compliance, but a strategic lever that companies can use to credibly manage and communicate their climate impact.