SIEM ROI: Is Security Monitoring Worth the Cost?
Security Information and Event Management (SIEM) platforms are among the most expensive security controls, typically costing $150K-$500K annually when including licensing, storage, and analyst time. The ROI question is legitimate and worth examining carefully.
The Detection Speed Factor
IBM's 2025 data shows that organisations with AI-powered SIEM and security automation identify and contain breaches 80 days faster than those without. Given that each day of breach duration increases costs, faster detection translates directly to lower impact.
The average breach takes 277 days to identify and contain without security monitoring. With SIEM and automation, this drops to approximately 197 days. The cost difference between fast and slow detection can exceed $1M per incident.
When SIEM Delivers ROI
SIEM ROI is strongest for organisations that face frequent security events, have regulatory requirements for monitoring and log retention, or operate in high-cost industries where breach impact justifies the investment. For smaller organisations with limited security events, managed SIEM or MDR services may provide better value than building an in-house capability.
Optimising SIEM Investment
- Focus on high-value log sources first (authentication, email, endpoint, cloud)
- Invest in detection rules that map to your specific risk scenarios
- Automate response for common, well-understood alerts
- Measure mean time to detect (MTTD) and mean time to respond (MTTR) to demonstrate improvement