How Much Does a Cybersecurity Audit Cost in the UK?

A cybersecurity audit is one of the most important investments a UK business can make — but the cost varies wildly. This guide gives you real UK market pricing.

Quick Answer: UK Cybersecurity Audit Cost Ranges

| Audit Type | Typical UK Price Range | |---|---| | Basic vulnerability scan | £500 – £2,000 | | Cyber Essentials assessment | £300 – £1,500 | | Penetration test (web app) | £2,000 – £10,000 | | Full infrastructure audit | £5,000 – £25,000 | | Enterprise SOC audit | £15,000 – £50,000+ | | Ongoing managed monitoring | £499 – £2,000/month |

What Affects the Price?

1. Scope and Environment Size

A 10-person law firm with Microsoft 365 has a very different attack surface than a 200-person financial services firm. The more users, systems, and data flows — the higher the cost.

2. Type of Audit

• Compliance audit (UK GDPR, Cyber Essentials, ISO 27001): £1,000–£8,000
• Technical penetration test: £2,000–£15,000
• Red team exercise: £10,000–£50,000+
• Managed SOC (ongoing): from £499/month

3. Consultant vs. MSSP vs. In-House

• Independent consultant: £800–£1,500/day
• Big 4 or enterprise MSSP: £20,000+ for basic engagements
• Managed security provider like Gridisys: from £499/month — ongoing protection

What a Cybersecurity Audit Should Include

1. Identity and access review
2. Cloud configuration review
3. Endpoint security assessment
4. Network perimeter review
5. Phishing and email security
6. Incident response readiness
7. Data handling and GDPR alignment

Cyber Essentials: The UK Government's Baseline

Cyber Essentials certification starts at £300–£500 (self-assessment) and £1,500–£5,000 for Plus (independently verified). Many UK government contracts require it as a minimum.

Is Continuous Monitoring Better Than an Annual Audit?

For most UK SMEs, yes. An annual audit gives a point-in-time snapshot. Continuous monitoring from £499/month (Gridisys) provides 24/7 alerting and ongoing compliance alignment.

Book a free security review →