Guide
ISO 9001 certification cost UK: prices by company size (2026)
Updated
ISO 9001 fees are mostly professional time: consultancy days to build the system and accredited auditor days to certify it. Both scale with headcount, so company size is the first question every provider asks. Here is what typical 2026 quotes look like.
Typical costs by company size
| Company size | Consultancy + implementation | Initial audit (stage 1 + 2) | Annual surveillance |
|---|---|---|---|
| 1–9 employees | £2,000–£3,500 | £1,000–£1,800 | £600–£900 |
| 10–49 employees | £3,000–£5,000 | £1,500–£3,000 | £800–£1,500 |
| 50–249 employees | £5,000–£12,000 | £3,000–£6,000+ | £1,500–£3,000 |
These are typical market quote ranges, not fixed prices. Certification bodies price from day rates (commonly £800–£1,200 per auditor day in 2026 quotes) multiplied by the audit time your headcount and scope require; consultants price the implementation from how much of a working system you already have. Multi-site companies, design-heavy scopes and regulated sectors sit above these ranges.
Where the money actually goes
- Consultancy and implementation
- Optional but common: a gap analysis against the standard, documentation, process mapping, staff briefing and an internal audit before the real one. Doing this in-house is the single biggest saving available, if someone has the time.
- Stage 1 audit
- The certification body reviews your documentation and readiness, usually a day or less for a small firm, and confirms you are ready for stage 2.
- Stage 2 audit
- The full certification audit: the auditor checks the system is actually operating. Pass, and the certificate is issued for three years.
- Surveillance and recertification
- Shorter surveillance audits in years one and two (£600–£1,500 typical), then a fuller recertification audit in year three (£1,000–£2,500 typical). Certification is a running cost, not a one-off.
Why headcount sets the audit fee
Accredited certification bodies do not invent audit durations: minimum audit time is set by international accreditation rules and scales with the number of people in scope and the complexity of the work. That is why a 40-person firm cannot buy a genuine accredited audit for the price of a 4-person firm, and why quotes that ignore your headcount deserve suspicion. See why UKAS accreditation matters for how to tell a real certificate from a cheap one.
Four ways to keep the cost down
- Scope precisely. Certify the legal entity and activities your customers actually ask about; every extra site and process adds audit time.
- Do more of the implementation in-house. Consultancy is the flexible half of the bill; a capable operations manager with good templates can replace much of it.
- Combine standards. If you will need ISO 14001 or ISO 45001 too, an integrated system shares documentation and audit days, cheaper than certifying twice.
- Get more than one quote. Day rates and package structures genuinely differ between certification bodies. Our form gets providers quoting your actual business, free.