Credible disclosure
Emissions figures that hold up in CDP responses, sustainability reports and customer questionnaires.
Verification readiness
ISO 14064-1 Greenhouse Gas Inventories
ISO 14064-1:2018 · verification to ISO 14064-3:2019
The international standard for quantifying and reporting organisational greenhouse gas emissions and removals. We build inventories that are complete, consistent and ready for independent verification.
What the standard covers
What an ISO 14064-1 inventory requires
ISO 14064-1 is not a management system standard. It sets principles and requirements for designing, developing, managing and reporting an organisation's greenhouse gas inventory.
Organisational boundaries
Which entities and facilities are in, using a control or equity share approach.
Reporting boundaries
Direct emissions and indirect emissions categories identified and assessed for significance.
Quantification
Methodologies, activity data and emission factors selected and justified.
Base year
A base year set, with a policy for recalculation when structures change.
Data management
Data collection, controls and records that support verification.
Uncertainty
Uncertainty assessed and reduced where it matters.
Reporting
A GHG report that meets the standard's content requirements.
Verification readiness
Evidence organised for an independent verifier working to ISO 14064-3.
Why organisations implement it
What a verifiable inventory delivers
Regulatory readiness
A basis for mandatory climate disclosure where it applies to you.
Target setting
A sound baseline for reduction targets and transition plans.
Supply chain answers
Consistent data for customers asking about your emissions.
Clean verification
Fewer findings when an independent verifier reviews your inventory.
Links to your EMS
Inventory controls built into ISO 14001 and ISO 50001 processes.
How we work
Path to a verified inventory
One AEC methodology from first assessment to verified inventory, delivered by registered lead auditors.
- AssessCurrent data, boundaries and reporting needs reviewed
- DesignBoundaries, methodologies, base year and data controls defined
- ImplementData collection running, emissions quantified
- TrainData owners trained on collection and controls
- VerifyInternal review and verification readiness check
- Report & sustainGHG report finalised and verifier supported
Full inventory build
No inventory yet. We set boundaries, methods and data controls from the start.
Typically 6 to 12 monthsInventory upgrade
Emissions already calculated. We align them with ISO 14064-1 and close gaps.
Typically 3 to 6 monthsVerification readiness
Inventory in place. We prepare evidence and support the verifier.
Typically 1 to 3 months
Who verifies
Independent verification, not certification
Greenhouse gas statements are verified by independent validation and verification bodies accredited to ISO 14065, working to ISO 14064-3. AEC builds and prepares your inventory; the verification opinion is theirs.
Independent
We help you select an accredited verification body suited to your reporting needs.
Verification-ready
Boundaries, methods and data controls documented before the verifier arrives.
No guarantees
We prepare you thoroughly and never promise an opinion only an independent verifier can give.
Case study
ISO 14064 in practice
Energy · multiple US states
NextEra Energy Resources
ISO 14064-1 / 14064-3 · 2023 · 12 months · multiple sites
1stTime
0Findings
12Months
The challenge
Producing a complete, verification-ready greenhouse gas inventory across a large, multi-state generation portfolio.
What AEC did
Developed the GHG inventory, boundaries, methodologies and data controls to ISO 14064-1, with verification-ready documentation for an independent verifier.
Verified first time to ISO 14064-3, with no findings. Supports Real Zero reporting, CDP disclosure and readiness for California climate disclosure rules.
Where it applies
ISO 14064-1 by industry
Power & utilities · generation portfolios
Manufacturing · process and combustion emissions
Oil & gas · flaring, venting and fugitives
Transport & logistics · fleet and freight emissions
Finance · corporate footprint and disclosure
Related standards
Questions
ISO 14064-1 FAQ
Does AEC verify GHG inventories?
No. Verification is carried out by independent bodies accredited to ISO 14065, working to ISO 14064-3. AEC builds your inventory and prepares it for that verification.
Is ISO 14064-1 a certification?
No. It is a standard for quantifying and reporting an organisation's greenhouse gas inventory. The outcome is a verified GHG statement, not a management system certificate.
How does ISO 14064-1 relate to the GHG Protocol?
Both set out how to build an organisational inventory and are broadly compatible. We can structure your inventory to meet both where your reporting requires it.
Which emissions do we have to include?
Direct emissions are always included. Indirect emissions categories are identified and included based on significance criteria you define and justify. We help you set and document those criteria.
Build a verification-ready GHG inventory
Tell us your entities, sites and reporting needs. We reply with a proposal covering boundaries, methodologies, data controls and verification readiness.
Greenhouse gas statements are verified by independent bodies accredited to ISO 14065. AEC prepares organisations for verification and does not guarantee verification outcomes.