Net Zero Compare
Carbon Trust Standard

Carbon Trust Standard: Verifies organizational environmental performance and reduction claims

Maílis Carrilho
Written by Maílis Carrilho
Updated on September 6th, 2026

Summary

The Carbon Trust Standard is a voluntary assurance and certification framework for environmental performance and claims. Carbon Trust services include product carbon footprint labels, product claim verification, and the Carbon Trust Standard for Zero Waste to Landfill. Product carbon footprint labels use recognized standards such as ISO 14067 and the GHG Protocol Product Standard. The framework is global and voluntary unless required by buyers, procurement, contracts or product claims. It does not replace mandatory climate disclosure, energy reporting, waste regulation, environmental permits, consumer protection law or green claims rules. It is relevant for companies seeking credible evidence for carbon, waste and product sustainability claims.

Details

Jurisdictions
  • Global
Mandatory for

The Carbon Trust Standard is not legally mandatory.

It can become practically required where:

A buyer requires Carbon Trust-verified claims.
A retailer requires product carbon labels.
A procurement process requests verified environmental performance.
A company makes public claims requiring third-party assurance.
A contract references Carbon Trust certification.
A sustainability-linked finance or customer requirement asks for verified data.

Voluntary for

In most cases, Carbon Trust assurance is voluntary and used to substantiate environmental and carbon claims.

Deep dive

4 min read
Updated Sep 6, 2026

📩 Stay ahead of climate regulation and reporting shifts

Regulatory updates, reporting standards, and new climate software — distilled into one concise weekly brief for decision-makers.

Thanks for signing up. Please check your inbox to confirm your subscription.

Practical updates. Once per week.


What’s Required

1. Selection of the relevant Carbon Trust assurance route

Carbon Trust assurance covers different claim types and environmental topics. Current Carbon Trust pages include the Carbon Trust Standard for Zero Waste to Landfill and product label verification resources.

Companies should identify:

  • Organizational claim.

  • Product claim.

  • Carbon footprint claim.

  • Carbon reduction claim.

  • Waste diversion claim.

  • Boundary and methodology.

  • Evidence required.

  • Verification route.

2. Measurement and evidence

Carbon Trust labels and assurance require measured data and evidence. For product carbon footprints, Carbon Trust states that calculations use recognized standards such as ISO 14067 and the GHG Protocol Product Standard.

Evidence may include:

  • Activity data.

  • Energy data.

  • Emissions factors.

  • Product lifecycle data.

  • Waste records.

  • Water data where applicable.

  • Methodology documents.

  • Boundary decisions.

  • Reduction evidence.

  • Audit trail.

3. Zero Waste to Landfill Standard

The Carbon Trust Standard for Zero Waste to Landfill recognizes organizations that can demonstrate that they have achieved zero waste to landfill, using Carbon Trust assessment and verification.

Organizations may need:

  • Waste stream records.

  • Landfill diversion evidence.

  • Contractor documentation.

  • Waste hierarchy evidence.

  • Data quality checks.

  • Site or organizational boundary definition.

  • Verification evidence.

4. Product labels and claims

The Carbon Trust label directory provides transparent information about product carbon footprints and associated claims, including the timeframe of the claim where applicable.

Companies using labels need to control:

  • Product scope.

  • Claim wording.

  • Validity period.

  • Footprint methodology.

  • Reduction claim evidence.

  • Packaging or marketing use.

  • Consumer-facing communication.

5. Independent assurance

Carbon Trust assurance provides third-party credibility for environmental claims. Companies need to provide auditable data and comply with applicable label and assurance rules.

Important Deadlines

The Carbon Trust Standard is voluntary, so there is no universal legal deadline.

Important timing points:

  • Certification timing depends on data collection, assessment, verification, and Carbon Trust decision.

  • Product label claims may include a timeframe showing that the claim is current.

  • Organizations should confirm the current Carbon Trust assurance product, label rules, and methodology before making claims.

Current Status

Carbon Trust assurance and labeling services are active. Carbon Trust currently provides product label transparency and assurance services, including product carbon footprint claims and Zero Waste to Landfill recognition.

Current status:

  • Active assurance and labeling organization.

  • Global scope.

  • Covers carbon footprint and product claims.

  • Includes Zero Waste to Landfill Standard.

  • Uses recognized standards such as ISO 14067 and GHG Protocol Product Standard for product carbon footprints.

  • Relevant to corporate sustainability claims, product claims, and environmental performance verification.

Penalties for Non-Compliance

The Carbon Trust does not impose statutory penalties.

Possible consequences include:

1. Certification refusal

A company may fail assurance if data, methodology, or evidence is insufficient.

2. Loss of label rights

Companies may lose the right to use Carbon Trust labels if claims are not verified or current.

3. Contractual consequences

If Carbon Trust verification is required by a buyer or procurement process, failure may affect contracts.

4. Reputational risk

Unsupported carbon, waste, or environmental claims can create greenwashing risk.

5. Regulatory risk

Environmental claims that are inaccurate or misleading may create risk under consumer protection and green claims rules.

Examples of Known Violations / Failure Modes

Typical failure modes include:

  • Claiming Carbon Trust certification without current verification.

  • Using a label on products outside verified scope.

  • Using outdated carbon footprint data.

  • Overstating reduction claims.

  • Missing product lifecycle data.

  • Poor emissions factor documentation.

  • Defining boundaries too narrowly.

  • Treating verification as legal compliance.

  • Making net zero claims that the assurance does not cover.

  • Confusing Zero Waste to Landfill with circularity or zero waste generation.

  • Continuing label use after claim expiry.

  • Making claims beyond the verified wording.

Resources


Maílis Carrilho
Added by:
Maílis Carrilho
Sustainability Research Analyst
Maílis Carrilho is a Sustainability Research Analyst (Intern) at Net Zero Compare, contributing research and analysis on climate tech, carbon policies, and sustainable solutions. She supports the team in developing fact-based content and insights to help companies and readers navigate the evolving sustainability landscape.
Our principle

Cut through the green tape

We don't push agendas. At Net Zero Compare, we cut through the hype and fear to deliver the straightforward facts you need for making informed decisions on green products and services. Whether motivated by compliance, customer demands, or a real passion for the environment, you’re welcome here. We provide reliable information. Why you seek it is not our concern.

Added on Sep 8, 2026 by Maílis Carrilho · Updated on Sep 6, 2026