Understanding the IIA’s Three Lines Model

The Three Lines Model is a framework to help organizations manage risk, ensure effective governance, and create long-term value. It clarifies roles, enhances accountability, and promotes collaboration across the organization.

How it Works:

First Line - Management & staff

Day-to-day risk management and achieving objectives

Second Line - Risk, compliance & support functions

Oversight, guidance, and monitoring first-line activities

Third Line - Internal Audit

Independent assurance that risk management and governance are effective

Why Implement It?

• Prevents role confusion and overlapping responsibilities
• Enhances accountability & transparency
• Encourages collaboration and breaks down silos
• Fosters ethical behavior and good governance

Core Principles:

1. Governance: Structures ensure accountability and decision-making clarity.
2. Governing Body Roles: Align objectives with stakeholder interests and oversee management & internal audit.
3. Management Roles: First line delivers operations; second line provides support & oversight.
4. Third Line Roles: Internal audit provides independent assurance and advice.
5. Third Line Independence: Direct accountability to the board, full access, and freedom from bias.
6. Creating & Protecting Value: Collaboration and alignment across all lines ensure reliable, risk-based decisions.

Key Takeaway: The Three Lines Model is not just a framework, it’s a mindset for coordinated governance, effective risk management, and sustained organizational value.