How Much Does Penetration Testing Cost in the UK?
A clear, direct answer to this question — written for UK business owners and IT decision-makers.
Direct Answer
Penetration testing in the UK costs £2,000–£15,000+ depending on scope. A basic external network test for an SME costs £2,000–£5,000. Web application testing costs £3,000–£10,000 depending on application complexity. Annual pen testing is recommended for businesses handling sensitive data or pursuing certifications. Cyber Essentials Plus includes a technical audit, but a full pen test provides deeper coverage of your actual attack surface.
Key Points
What you need to know.
The Short Answer
A concise overview of what you need to know.
For UK Businesses
How this applies specifically in the UK context.
Cost Considerations
What to expect in terms of investment and ongoing costs.
Next Steps
What you should do with this information.
Quick Comparison
| Feature | Option A | Option B |
|---|
Frequently Asked Questions
The main cost drivers are scope (number of IP addresses, applications, or environments), complexity (cloud, hybrid, or on-premise), testing type (external, internal, or web application), and whether social engineering is included. A basic external network test for a 50-user business typically starts at £2,000, whilst a comprehensive web application test can exceed £10,000. With 22% of breaches involving compromised credentials (Verizon DBIR 2025), testing authentication controls is worth the investment.
CREST accreditation ensures the testing firm meets recognised standards for methodology, ethics, and data handling. For UK businesses, CREST or CHECK (for public sector) accreditation provides confidence that testers follow structured approaches rather than running automated scans alone. Many cyber insurers and compliance frameworks now expect penetration tests to be conducted by accredited providers.
A thorough report should include an executive summary for leadership, technical findings ranked by severity, evidence of exploitation, and prioritised remediation guidance. Organisations certified with Cyber Essentials are 92% less likely to claim on cyber insurance (IASME), but a pen test report provides the granular evidence insurers and auditors require to validate your real-world security posture beyond certification.
Related Questions
Cybersecurity Guide for UK SMEs
How penetration testing fits within a broader cybersecurity programme for UK businesses.
Cyber Essentials Certification
Cyber Essentials Plus includes a technical audit — the starting point before a full penetration test.
How Much Does Managed Cybersecurity Cost?
Ongoing managed security that reduces the findings a pen test will surface in the first place.
Protect your business → Get Cybersecurity Assessment