ISO Registrars Directory
Find and compare accredited ISO certification bodies and registrars across the UK, US, and Ireland. ISOCentral lists UKAS, ANAB, and INAB-accredited registrars for ISO 9001, ISO 27001, ISO 14001, ISO 45001, ISO 42001, and more. Filter by standard and location to find the right certification body for your business.
161 registrars found
Featured Registrars (9)
Auva Certification Limited
BSI Group
Intertek UK & Ireland
LRQA
NQA Certification Ltd
OPG Certification Services, LLC
Perry Johnson Registrars, Inc.
West Assured
Zertia
All Registrars
360 Advanced Compass Rose, LLC
3Core2 Certification Limited
A Cube TIC Limited trading as A Cube and ACT
A-LIGN
AA Certification Limited
AARC-360
Aboma Certification B.V.
ABS Quality Evaluations Inc.
Accedere
Advanced Waste Management
AFNOR UK Limited
AIB International, Inc
Altus Certification Ltd
American Certification Group (ACG)
Amtivo (USA), Inc.
APIQR (American Petroleum Institute)
Approachable Certification Ltd
Aprio, LLP
Armanino Certified, LLC
AssurancePoint, LLC
How to Choose an ISO Certification Body
A certification body, also called a registrar, is the organization that conducts your ISO audit and issues your certificate. Choosing the right one matters: costs, audit style, turnaround times, and sector expertise vary considerably between bodies. Your certificate is only as credible as the accreditation body that has approved your certification body, so understanding accreditation is the essential first step.
UKAS, ANAB, and INAB: Accreditation Explained
Accreditation is the process by which a national body verifies that a certification body meets international standards for competence and impartiality. Certification issued by an accredited body carries far more weight than certification from an unaccredited one, and many procurement frameworks, government contracts, and regulated sectors require accredited certification specifically.
Accreditation body | Country | What it accredits |
|---|---|---|
UKAS (United Kingdom Accreditation Service) | United Kingdom | ISO certification bodies operating in the UK |
ANAB (ANSI National Accreditation Board) | United States | ISO certification bodies operating in the US |
INAB (Irish National Accreditation Board) | Ireland | ISO certification bodies operating in Ireland |
DAkkS | Germany | ISO certification bodies operating in Germany |
COFRAC | France | ISO certification bodies operating in France |
All ISOCentral listed registrars are accredited by a nationally recognised accreditation body. Certificates issued by accredited bodies are recognised internationally under the IAF Multilateral Recognition Arrangement (IAF MLA).
What to Look for When Comparing Certification Bodies
Accreditation status: confirm the body is accredited by UKAS, ANAB, INAB, or another IAF MLA signatory for the specific standard you are certifying to.
Sector expertise: some certification bodies have dedicated audit teams for specific sectors such as healthcare, manufacturing, or financial services. Auditors with sector knowledge conduct more efficient and relevant audits.
Geographic coverage: confirm the body can audit your sites and that auditors are available in your location without excessive travel costs.
Audit frequency and surveillance schedule: all ISO certifications require annual surveillance audits and a full recertification audit every three years. Understand the body's scheduling flexibility and typical lead times.
Multi-standard capability: if you plan to certify to more than one standard, a certification body that can audit multiple standards in a single visit will reduce cost and disruption significantly.
Transition support: if you are transitioning from an older version of a standard (such as moving to ISO 9001:2026), check that your certification body has trained auditors for the new version.
Typical ISO Certification Body Fees
Certification body fees vary by standard, organization size, number of sites, and the complexity of the scope. The ranges below are indicative for single-site organizations with fewer than 100 employees.
Standard | Initial certification (Stage 1 + Stage 2) | Annual surveillance | 3-year recertification |
|---|---|---|---|
ISO 9001 | $3,500 to $8,000 / £2,800 to £6,400 | $1,500 to $3,500 / £1,200 to £2,800 | $3,000 to $7,000 / £2,400 to £5,600 |
ISO 27001 | $5,000 to $12,000 / £4,000 to £9,500 | $2,000 to $5,000 / £1,600 to £4,000 | $4,500 to $10,000 / £3,500 to £8,000 |
ISO 14001 | $4,000 to $9,000 / £3,200 to £7,200 | $1,500 to $4,000 / £1,200 to £3,200 | $3,500 to $8,000 / £2,800 to £6,400 |
ISO 45001 | $3,500 to $8,000 / £2,800 to £6,400 | $1,500 to $3,500 / £1,200 to £2,800 | $3,000 to $7,000 / £2,400 to £5,600 |
ISO 42001 | $7,000 to $20,000 / £5,500 to £16,000 | $2,500 to $7,000 / £2,000 to £5,500 | $6,000 to $16,000 / £4,800 to £12,800 |
Multi-standard audits (conducting more than one standard in a single visit) typically reduce combined fees by 20 to 40 percent.