For a sustainability audit, it helps to distinguish between standards, certification programs, and independent verification bodies. There is no single global government agency that certifies every business as “carbon neutral.” Instead, businesses typically use a recognized carbon-neutrality standard or program and have their claims assessed by an independent verifier/certifier.
Common organizations involved include:
Organization / program
Role
Climate Impact Partners
Runs the CarbonNeutral® certification program based on the CarbonNeutral Protocol, which requires measurement of emissions, reduction actions, and treatment of remaining emissions.
Develops standards such as ISO 14068-1 (carbon neutrality) and related greenhouse gas standards; ISO itself does not issue carbon-neutral certificates. Certification is performed by external bodies.
International Accreditation Forum
Supports recognition of accredited conformity-assessment systems; accredited verification bodies are often recognized through national accreditation systems connected to IAF.
American National Accreditation Board
Accredits greenhouse-gas validation and verification bodies under ISO 14065 in the U.S. context.
Verra and similar carbon-market standards organizations
Often oversee carbon credit standards and require independent validation/verification for projects, though they generally do not certify an entire company as carbon neutral themselves.
For an audit, you would usually look for:
A carbon accounting methodology
Common references include the Greenhouse Gas Protocol and ISO 14064 standards.
Certifying a business as carbon neutral involves a mix of independent non-profit certifiers, global standards bodies, and major third-party auditing firms.
When conducting your audit, it is important to distinguish between the standards (the rules/frameworks) and the certifiers (the independent auditors or organizations that verify compliance).
The Change Climate Project (formerly Climate Neutral): They previously operated the Climate Neutral Certified label. They have since evolved their framework into The Climate Label , which emphasizes verified emission reduction, operational measuring, and funding external climate solutions rather than relying strictly on a "carbon neutral" badge.
SCS Global Services: Offers robust third-party certification for carbon neutrality across businesses, events, and products, typically aligning with internationally recognized protocols.
2. Major Global Auditing and Verification Bodies
Many large enterprises use accredited, multinational testing and inspection agencies to audit their greenhouse gas (GHG) inventories against official standards:
Bureau Veritas: Provides independent third-party verification and certification to prove corporate carbon neutrality claims and support decarbonization roadmaps.
SGS / TÜV Rheinland / DNV: Global testing and certification firms that audit corporate Scope 1, 2, and (where applicable) Scope 3 emissions data to issue formal carbon-neutral statements.
BSI (British Standards Institution): Certifies organizations against formal international specifications.
3. The Underlying Standards (What They Certify Against)
Certifiers evaluate a business based on recognized frameworks rather than making up their own rules:
ISO 14068-1: The primary international standard for carbon neutrality (which succeeded the older PAS 2060 specification). It places a heavy emphasis on actual internal emissions reductions alongside high-integrity offsetting.
GHG Protocol: While not a certification body itself, the Greenhouse Gas Protocol provides the foundational accounting math that virtually all carbon-neutral certifiers require companies to use when measuring their footprint.
SBTi (Science Based Targets initiative): While focused on long-term net-zero targets rather than immediate carbon neutrality, aligning with SBTi is increasingly a prerequisite or gold standard for corporate climate audits.
If you're looking into a specific type of certification for your audit, let me know:
Is your audit focused on a whole company/brand or a specific product/event?
Are you looking for a consumer-facing label or a strictly technical regulatory audit?
Yes. There are several organizations that can certify or independently verify a company’s carbon-neutral status. The landscape is changing, though: ISO 14068 is now the key international standard, replacing the older PAS 2060 framework. ISO published the first edition of ISO 14068 in September 2026.
Organizations worth considering
Organization
What they offer
Standard / framework
BSI
Certification and verification of carbon-neutrality claims, including its Carbon Neutrality Kitemark
ISO 14068-1
Bureau Veritas
Independent third-party verification/certification of corporate carbon-neutrality claims
ISO 14068
RINA
Certification of organizations, products, events and other subjects for carbon neutrality
ISO 14068-1; also its GO 2 CARBON NEUTRAL scheme
SCS Global Services
Certification under SCS-108, with annual independent audits
SCS-108 Carbon Neutral Standard
DEKRA
Third-party verification of carbon-neutral organizations and products
PAS 2060; transitioning toward newer approaches
Applus+ Certification
Verification of GHG calculation, reduction and compensation
ISO 14068-1 / PAS 2060
EUROCERT
Independent validation/verification through its ClimaNeutral program
ISO 14068-1, ISO 14064 and ISO 17029
Climate Impact Partners
Its CarbonNeutral® certification for businesses, products and events
CarbonNeutral Protocol
One important distinction
For a sustainability audit, I'd separate these into three categories:
Independent certification/verification bodies — BSI, Bureau Veritas, RINA, SCS Global Services, DEKRA, Applus+, EUROCERT. These are the strongest candidates if your audit requires evidence of third-party assurance.
Carbon-neutral certification programs — Climate Impact Partners' CarbonNeutral® certification is a prominent example. Its protocol sets the requirements for achieving certification and has been updated annually.
Carbon/climate program providers — companies such as ClimatePartner can help organizations measure emissions, reduce them and finance climate projects, but their current approach is worth distinguishing from a conventional "carbon-neutral certification." In the EU, new rules applying from September 27, 2026 also make unqualified carbon-neutral marketing claims substantially more problematic.
What I'd look for in your audit
If you're evaluating whether a certification is credible, check whether it involves:
Independent third-party verification, rather than self-certification.
A quantified organizational GHG inventory covering the appropriate scopes.
A documented reduction hierarchy—reductions/removals before offsetting.
Verification of the remaining carbon credits/offsets.
A defined certification period and surveillance/annual checks.
Alignment with ISO 14068, which explicitly prioritizes emissions reductions and removals before using offsets.
For a 2026 audit, I'd put ISO 14068-based certification at the top of the evaluation criteria rather than treating PAS 2060 certification as equivalent. ISO 14068:2026 is now the current international standard, and it specifically addresses carbon-neutrality claims for organizations, products, services, buildings and events.
If useful, I can also make you a comparison matrix of 10–15 certifiers covering geographic coverage, ISO/PAS standard, accreditation, audit methodology, approximate cost, certification duration, and whether they certify entire companies vs. products.
