ISO 14064 is a three-part international standard series published by the International Organisation for Standardisation that specifies principles and requirements for the quantification, monitoring, reporting, and independent verification of greenhouse gas (GHG) emissions and removals. Part 1 addresses organisational-level GHG inventories including Scope 1, 2, and 3 emissions; Part 2 covers project-level GHG mitigation quantification underpinning carbon credit issuance; and Part 3 prescribes competence and process requirements for validation and verification bodies. Together the three parts form an auditable, globally recognised framework that underpins corporate sustainability reporting, voluntary and compliance carbon markets, and emerging blockchain-based carbon credit tokenisation schemes.
Overview
- First published in 2006 and substantially revised in 2018, ISO 14064 was developed to provide a common, auditable language for organisational and project-level GHG accounting.
- The revision aligned the standard with Scope 3 Emissions accounting requirements, consistent with the GHG Protocol value-chain methodology, and strengthened competence requirements for Third Party Auditor bodies.
- The standard operates within the Paris Agreement context, where transparent, comparable, and independently verified GHG data are prerequisites for national and corporate climate commitments.
- Adoption is widespread across energy, manufacturing, finance, and public-sector organisations required to disclose emissions under frameworks such as the TCFD (Task Force on Climate-related Financial Disclosures) and emerging mandatory reporting regimes.
- ISO 14064 achieves credibility through mandatory engagement of accredited Conformity Assessment bodies operating under ISO 17029, ensuring verification statements are defensible in regulatory and investor scrutiny.
Key Components
Part 1 — Organisational GHG Inventories
- Defines organisational boundary using equity-share or operational-control consolidation approaches.
- Requires classification of emissions into Scope 1 Emissions (direct), Scope 2 Emissions (purchased energy), and Scope 3 Emissions (value-chain indirect).
- Mandates selection and consistent application of Emission Factors from recognised databases (e.g. IPCC, national inventories, supplier-specific data).
- Requires quantification of uncertainty and documentation of data quality procedures.
- Specifies requirements for GHG Inventory Management including recalculation policies for structural changes to the reporting entity.
- Establishes a base year against which emissions trends are tracked, supporting Corporate Sustainability Reporting disclosures.
Part 2 — Project-Level GHG Mitigation
- Covers the design, development, implementation, and monitoring of GHG mitigation projects such as reforestation, methane capture, energy-efficiency upgrades, and soil carbon sequestration.
- Requires establishment of a counterfactual baseline representing the “most plausible” scenario in the absence of the project.
- Quantifies net GHG reductions or removal enhancements as the difference between project and baseline emissions, subject to Carbon Project Accounting rules.
- Provides the methodological basis for issuance of Carbon Credits (offset units) in Voluntary Carbon Markets such as Verra VCS, Gold Standard, and American Carbon Registry.
- Requires monitoring plans, data management procedures, and documentation sufficient for independent Third Party Auditor review.
Part 3 — Validation and Verification Bodies
- Specifies competence requirements for personnel and organisations performing validation (prospective assurance of project plans) and verification (retrospective assurance of reported data).
- Aligns with ISO 17029 (Conformity Assessment — General principles and requirements for validation and verification bodies).
- Defines the assurance process: risk assessment, evidence collection, technical review, quality control, and issuance of a verification statement.
- Prescribes impartiality, independence, and conflict-of-interest management rules for Conformity Assessment bodies.
Applications and Use Cases
- Corporate Net-Zero Commitments: Companies disclosing emissions under Science Based Targets initiative (SBTi) or CDP are expected to apply ISO 14064-1 methodology for their GHG inventories, providing investor-grade assurance.
- Carbon Market Integrity: Project developers seeking registration on Voluntary Carbon Markets registries must demonstrate alignment with ISO 14064-2 to obtain verified carbon units (VCUs or similar).
- Regulatory Compliance: National ETS (emissions trading systems) and mandatory carbon disclosure regimes increasingly reference ISO 14064 as the acceptable GHG accounting methodology, including under the EU Corporate Sustainability Reporting Directive (CSRD).
- Supply Chain Due Diligence: Purchasers and investors rely on ISO 14064-compliant supplier data to construct credible Scope 3 Emissions inventories and conduct Climate Risk assessments.
- Carbon Tokenisation: Blockchain-based Carbon Tokenisation platforms (e.g. Toucan Protocol, KlimaDAO’s reference infrastructure) increasingly require ISO 14064-compliant verification certificates as a prerequisite for minting Smart Contracts-backed carbon tokens, providing an audit trail from physical mitigation to digital asset.
- Public Sector and Infrastructure: Governments and city authorities use ISO 14064-1 to report national and sub-national GHG inventories, complementing UNFCCC reporting under the Biennial Transparency Reports.
- Green Finance: Green Bonds and sustainability-linked loans increasingly reference ISO 14064 verification as an eligibility condition for climate-use-of-proceeds requirements.
Standards and Context
- ISO 14000 Series: ISO 14064 sits within the broader ISO 14000 family alongside ISO 14001 (Environmental Management Systems), ISO 14044 (Life Cycle Assessment), and ISO 14067 (Carbon Footprint of Products).
- GHG Protocol: The GHG Protocol Corporate Standard (WRI/WBCSD) and ISO 14064-1 are substantially aligned; the Protocol is more widely adopted in practice, whereas ISO 14064 provides the formal internationally ratified standard with certification infrastructure.
- ISO 17029: ISO 14064-3 is intended for use alongside ISO 17029, which governs the accreditation of Conformity Assessment bodies performing validation and verification.
- TCFD and ISSB: The TCFD framework and ISSB IFRS S2 Climate Disclosure Standard reference ISO 14064 as a preferred methodology for GHG inventory assurance, driving uptake in capital markets.
- Voluntary Carbon Standard (VCS): Verra’s VCS programme, the largest Voluntary Carbon Markets registry, requires methodology alignment with ISO 14064-2 principles for offset project registration.
- CSRD and EU Taxonomy: The EU Corporate Sustainability Reporting Directive (CSRD) and associated European Sustainability Reporting Standards (ESRS E1) mandate third-party verified GHG data consistent with ISO 14064 methodology, affecting ~50,000 companies.
- Science Based Targets initiative (SBTi): Companies setting targets under the Science Based Targets initiative must provide ISO 14064-compliant inventory data as the evidential basis for target validation.
- Blockchain Integration: ISO 14064 verification documents are increasingly referenced in Smart Contracts governing Carbon Tokenisation schemes, enabling programmable retirement and provenance tracking of carbon credits on distributed ledgers.