Direct comparison
Accreditation vs certification
Accreditation recognises the competence of a body to perform specific tasks; certification attests that an organisation, product or person conforms to a standard. The terms are not interchangeable.
The step most authors miss
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Side-by-side comparison
| Dimension | Accreditation | Certification |
|---|---|---|
| What it is | Formal recognition that a body is competent to perform specific tasks against a standard. | Third-party attestation that a product, system or person conforms to a standard. |
| What it assesses | Competence — the ability and authority to carry out the task reliably. | Conformity — whether the subject meets the requirements of the standard. |
| Who grants it | An accreditation body, often a single nationally recognised authority per country. | A certification body (also called a conformity assessment body or registrar). |
| Typical subject | Laboratories, inspection bodies and certification bodies themselves. | Organisations, management systems, products or individuals. |
| Example standard | ISO/IEC 17025 for laboratories; ISO/IEC 17021 for certification bodies. | ISO 9001 for quality management; ISO/IEC 27001 for information security. |
| Position in the chain | A level above certification — it can accredit the bodies that certify others. | A level below accreditation — certification bodies are themselves accredited. |
| Typical outcome | A scope of accreditation listing the tasks the body is recognised to perform. | A certificate stating conformity to a named standard, usually time-limited. |
| International recognition | Coordinated through ILAC and IAF mutual-recognition arrangements. | Trusted internationally largely because the certifying body is accredited. |
| Common shorthand | A laboratory is accredited; a competence is recognised. | An organisation is certified; a conformity is confirmed. |
A layered system of trust
Accreditation and certification work together as a hierarchy of assurance. At the base, a product or management system is certified as conforming to a standard. The body that issues that certificate is itself accredited, by an accreditation body, as competent and impartial to do so. The accreditation bodies in turn participate in international arrangements (ILAC for laboratories and inspection, IAF for management-system and product certification) so that recognition crosses borders. This layering is why the everyday phrase ISO-certified usually means conformity confirmed by an accredited body, while ISO-accredited is, strictly, a misuse: organisations are certified, laboratories are accredited.
Common questions
FAQ
Can an organisation be ISO-accredited?+
Strictly, no — that phrasing is a common error. Organisations are certified to management-system standards such as ISO 9001. Accreditation applies to bodies whose competence is recognised, such as laboratories accredited to ISO/IEC 17025 or certification bodies accredited to operate. So an organisation is ISO 9001 certified, while a laboratory is ISO/IEC 17025 accredited.
Is accreditation higher than certification?+
In the assurance chain, yes. Accreditation recognises the competence of a body — including the certification bodies that certify other organisations — so it sits a level above certification. An accredited certification body issues certificates, and its accreditation is what gives those certificates international credibility.
Why does it matter whether a certificate is accredited?+
A certificate carries weight only if the body that issued it is competent and impartial. Accreditation provides that independent assurance. An accredited certification body has been assessed against standards such as ISO/IEC 17021, so its certificates are recognised internationally; a certificate from an unaccredited body offers far weaker assurance.
Going deeper
