How Much Does Managed Cybersecurity Cost in the UK?

A comprehensive managed service should include endpoint detection and response, email security with anti-phishing, 24/7 monitoring, vulnerability scanning, patch management, and incident response. 85% of businesses that experienced a breach identified phishing as the attack vector (DSIT 2025), so email protection is non-negotiable. Check whether incident response is included in the monthly fee or charged separately, as per-incident billing can create unexpected costs.

Most providers use per-user-per-month pricing, so costs increase linearly as you add staff. Volume discounts typically apply at thresholds of 50, 100, and 250 users. The per-user rate often decreases at scale because fixed overhead costs are spread across more endpoints. The average cost of the most disruptive breach is £3,550 (DSIT 2025), making the incremental cost of covering additional users a sound investment.

Watch for per-incident response charges, overage fees on alert volumes, and separate costs for onboarding or offboarding users. Some providers also charge extra for compliance reporting or Cyber Essentials support. Cyber Essentials certified organisations are 92% less likely to claim on cyber insurance (IASME), so a good managed service should include certification support without additional surcharges to maximise your return on investment.