Security Maturity Models: From Basic to Advanced
Security maturity describes how well-developed an organisation's security programme is. Understanding your current maturity level helps prioritise investments and set realistic expectations for improvement.
Four Levels of Security Maturity
Basic (1-3 controls): The organisation has fundamental protections in place — typically MFA, antivirus, and basic backups. This level addresses the most common threats but leaves significant gaps in detection, response, and advanced threat protection. Most small businesses operate at this level.
Developing (4-6 controls): Beyond the basics, the organisation has added proactive controls like security awareness training, email security, and vulnerability management. Detection capabilities are emerging, and there is a documented incident response process. Risk is meaningfully reduced but gaps remain in monitoring and privileged access.
Established (7-9 controls): The organisation has a comprehensive security programme including SIEM, incident response retainers, and data loss prevention. Security is integrated into business processes, and there is regular reporting to leadership. Most mid-size enterprises target this level.
Advanced (10+ controls): A mature programme with Zero Trust architecture, privileged access management, cloud security posture management, and continuous monitoring. The organisation has a dedicated security team, regular testing, and board-level security governance. This level is appropriate for large enterprises and high-risk industries.
Progressing Through Maturity Levels
- Each level builds on the previous one — do not skip ahead to advanced controls without foundational coverage
- ROI per dollar typically decreases as maturity increases (diminishing returns), but the absolute risk position improves
- Match your target maturity to your industry, regulatory requirements, and risk appetite
- Use the maturity model to create a multi-year security roadmap that the board can support
Maturity as a Communication Tool
Maturity levels give non-technical stakeholders an intuitive understanding of the security programme's state. "We are currently at Developing maturity and this proposal moves us to Established" is far more meaningful to a board than a list of technical controls.