Figures as read on 19 October 2026
Short answer. We found one body figure: Amtivo says ISO 45001 certification "may start from around £2,500". We found no published range by company size from any body. The price turns on the health and safety risk of your work.
What is published
| Source | What it says | Caveat |
|---|---|---|
| Amtivo / British Assessment Bureau (ISO 45001 page) | Costs "may start from around £2,500". | A starting point, with no size band or sector stated. |
| Citation ISO Certification (ISO 45001 page) | Total cost is made up of an initial consultancy fee and an annual fee. Sector, offices, turnover, employees and the accreditation you need are named as drivers. It gives no fees by company size. | States ASCB accreditation elsewhere, not UKAS. We do not quote its monthly package price because it is tied to a long contract. |
What moves the number
- Risk category. The audit-time rules use three occupational health and safety complexity categories. High is typically construction, heavy manufacturing or processing; medium is light manufacturing with some significant risks; low is office-based.
- Who counts as personnel. For ISO 45001 the headcount also includes contractors and subcontractors working under your control or influence, so a firm using many subcontractors can have more effective personnel than its payroll.
- Sites and temporary work sites. Construction firms add site visits.
What we could not find
There is no published range by size and no audit-day table from any body we reviewed. We have not estimated one.