ISO 27001 is the UK's most rapidly growing ISO certification standard — driven by NCSC (National Cyber Security Centre) recommendations, the CCS G-Cloud framework's data security requirements, NHS Digital's information governance mandates, and GDPR's requirement for appropriate technical and organisational security measures. For UK technology, professional services, and data-handling companies, ISO 27001 is increasingly commercially mandatory.
G-Cloud
CCS — ISO 27001 for data services
NCSC
Recommends ISO 27001
GDPR
ISO 27001 supports compliance
£1,000
Starting cost
UK Regulatory and Commercial Drivers
- NCSC Cyber Essentials vs ISO 27001 — Cyber Essentials (£300) is the UK government's minimum cyber standard. ISO 27001 is comprehensive information security management. For contracts handling OFFICIAL data: Cyber Essentials Plus minimum; for OFFICIAL-SENSITIVE: ISO 27001 required.
- ICO and UK GDPR — ISO 27001 provides documented evidence of appropriate technical measures under UK GDPR Article 32
- FCA Operational Resilience — Financial conduct authority's operational resilience rules align with ISO 27001 requirements
- NHS DSP Toolkit — NHS Data Security and Protection Toolkit aligns with ISO 27001
Cost for UK ISO 27001
| Company Size | ISO 27001 (GBP) | Timeline |
|---|---|---|
| Micro/Small (1-25) | £1,000 – £2,000 | 8-12 weeks |
| Medium (25-100) | £2,000 – £5,000 | 10-14 weeks |
| Large (100-500) | £5,000 – £12,000 | 12-18 weeks |
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Frequently Asked Questions
Cyber Essentials Plus is the UK government's minimum for contracts involving personal data or network services. ISO 27001 exceeds Cyber Essentials requirements comprehensively. Most government contracts accept ISO 27001 as satisfying Cyber Essentials Plus requirements. For OFFICIAL-SENSITIVE contracts: ISO 27001 is typically required rather than just Cyber Essentials.
ISO 27001 is not legally required by UK GDPR but provides the best documented evidence of "appropriate technical and organisational measures" required by UK GDPR Article 32. The ICO has cited ISO 27001 as appropriate evidence in several enforcement decisions. Companies facing ICO investigation significantly benefit from having ISO 27001.