Why there is no single ESG certificate — and how companies can identify the right form of evidence for customers, tenders, reporting and EcoVadis.
Companies searching for an ESG certification often expect one recognised certificate that confirms their overall sustainability performance. In practice, no single certificate covers every environmental, social and governance requirement.
Depending on the business objective, the right solution may be a management system certification, an independent review of ESG data, a building-related verification, a professional qualification or an ESG rating.
The better starting question is not: “Which ESG certificate should we buy?”
It is: “What type of evidence do our customers, banks, investors or tendering organisations actually require?”
What Does ESG Certification Mean?
The term ESG certification is used for several different forms of assurance. These formats may appear similar from the outside, but they assess different subjects and deliver different results.
01
Management system certification
Assesses: Policies, processes, responsibilities and controls
Typical purpose: Customer requirements and tenders
02
Independent ESG assurance
Assesses: Defined data, disclosures or reports
Typical purpose: Credibility of sustainability reporting
03
ESG rating
Assesses: Maturity of sustainability management
Typical purpose: Supplier assessments and benchmarking
04
Building or project verification
Assesses: Asset-specific sustainability criteria
Typical purpose: Real estate and investment decisions
05
Professional certification
Assesses: Knowledge of individual employees
Typical purpose: Qualification and competence
A certificate for an individual ESG professional does not demonstrate that the company itself has effective ESG processes. In the same way, an assurance statement for selected sustainability data does not confirm the quality of the entire management system.
This distinction matters because choosing the wrong format creates unnecessary work without necessarily satisfying the original requirement.
Start With the Business Requirement
Before pursuing an ESG certification for a company, clarify who is asking for the evidence and why.
A customer requests a supplier sustainability assessment
ESG rating such as EcoVadis
Benefit: Comparable scorecard
A tender requires audited company processes
Management system certification
Benefit: Evidence of structured processes
ESG disclosures need greater credibility
Independent assurance or verification
Benefit: Review of defined information
A property needs a sustainability assessment
Building-related verification
Benefit: Asset-specific evaluation
ESG responsibilities are being established internally
Professional certification or training
Benefit: Verified individual expertise
This first step prevents companies from investing in a label that does not match the underlying requirement.
Not sure which ESG evidence your customers expect?
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How Can a Company Obtain ESG Certification?
The process depends on the chosen standard, rating or verification. However, most projects follow a similar sequence.
1
Define purpose and scope
Clarify the intended business objective and the entity, sites or reporting scope to be covered.
2
Review existing structures
Assess the policies, targets, data, governance and responsibilities already in place.
3
Identify missing evidence
Determine where documents, processes or reliable ESG data are still missing.
4
Prepare documents and processes
Develop the required evidence and align responsibilities before submission.
5
Complete the audit, review or rating
Submit the information and use the result as a basis for further management improvement.
Typical evidence includes:
Environmental and sustainability policies Greenhouse gas inventories Reduction targets Risk assessments Supplier requirements Employee training records Governance structures KPI reports and action plans
After preparation, the company submits its information for an audit, review or rating. The result should then be used as a management tool rather than treated as a one-off communication exercise.
The most valuable outcome is not the certificate itself. It is the clarity created around data, responsibilities, risks and improvement priorities.
What Does ESG Certification Cost?
There is no reliable fixed price for an ESG certification. The total cost depends on the size and complexity of the organisation, the number of sites, the chosen scheme and the quality of the existing documentation.
Provider fees Registration, audit, assessment or subscription
Internal resources Data collection, document review and coordination
External support Gap analysis, preparation and evidence review
Follow-up costs Corrective actions, surveillance audits or reassessments
A company with well-structured ESG data and clearly assigned responsibilities will usually require less preparation than an organisation starting from fragmented spreadsheets and informal processes.
For this reason, the most important cost driver is often not the external fee. It is the internal effort required to create reliable and auditable evidence.
EcoVadis Is an ESG Rating, Not a Certification
The phrase “EcoVadis certification” is widely used, but it is technically inaccurate. EcoVadis provides an ESG rating of a company’s sustainability management system.
The questionnaire is adapted to factors such as company size, business activity and country-related risks. Companies must support their answers with suitable evidence. A simple statement that a policy or target exists is not sufficient if it cannot be demonstrated through a valid document.
Technically correct
EcoVadis provides a rating and scorecard — not a conventional ESG certification.
Environment
Labour and human rights
Ethics
Sustainable procurement
After submission, the information is reviewed and the company receives a scorecard. High-performing companies may also qualify for a medal. These medals have a similar external signalling effect to a certificate, but they remain part of a rating system.
What Are the Benefits of an EcoVadis Rating?
EXTERNAL VALUE
It helps companies respond to supplier requirements and demonstrate that sustainability topics are being managed systematically.
INTERNAL VALUE
The scorecard provides a structured view of strengths, gaps and practical improvement priorities.
The real value lies in the improvement process. Companies can use the results to strengthen policies, close evidence gaps and define practical next steps for the following assessment.
A common challenge is not the absence of sustainability activity. Many companies already have targets, projects and data. The difficulty is organising this information in a way that meets the assessment criteria.
This requires both ESG expertise and an understanding of how suitable evidence should be structured.
From Existing ESG Work to a Strong Rating
Numatic case study
In one ConClimate project, Numatic already had a solid foundation from previous work, including a double materiality assessment and advanced carbon management activities.
The key task was to structure the available information, assign it to the relevant assessment questions and prepare the supporting documents in a clear and consistent format. This enabled the company to achieve an EcoVadis Gold rating in its first assessment.
The principle: ESG performance only becomes visible when policies, actions, data and evidence are connected in a transparent way.
View the case study
Preparing for EcoVadis?
ConClimate supports companies with gap analysis, document review, questionnaire preparation and targeted improvement planning.
Explore EcoVadis support
Frequently Asked Questions
Is EcoVadis an ESG certification?
No. EcoVadis is an ESG rating. Companies receive a scorecard and may qualify for a medal, but the process is not a conventional certification.
How do companies get ESG certified?
The company must first select a suitable certification or assurance framework. It then prepares the required policies, data, processes and evidence before completing an audit, assessment or verification.
Is ESG certification mandatory?
There is no universal ESG certificate that every company must obtain. Requirements may arise from customers, tenders, financing arrangements, industry standards or reporting obligations.
What is the difference between ESG certification and ESG reporting assurance?
An ESG certification normally evaluates defined processes or management structures. Reporting assurance examines selected sustainability information within a specified scope and reporting period.
How long is ESG certification valid?
Validity depends on the individual scheme. Some certifications include recurring surveillance audits, while ratings and verifications may require regular reassessment.
Choose the right ESG proof
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