Since 1941, The Institute of Internal Auditors has been the global leader in advancing the internal audit profession.
As the author and curator of the Global Internal Audit Standards™, The IIA is the profession's only source for certification, education, research, and guidance.
The IIA Global Leadership Team
Internal audit profession leaders from around the world make up a diverse and experienced global team.
Global Advocacy
The IIA is committed to protecting and advancing laws and corporate governance policies which are in the best interests of the internal audit profession around the world.
Internal Audit Academic Programs
Partner with The IIA and the Internal Audit Foundation through a global academic partnership program.
IIA Chapters & National Institutes
The IIA is a global professional association that represents more than 260,000 members, over 140 chapters, and 117 institutes in more than 170 countries and territories.
Get Involved & Connect
The IIA is more than just an association—it’s a global network of professionals dedicated to improving the field of internal auditing. With over 140 chapters across North America and a strong global network, we provide local and international networking, learning opportunities, and industry influence.
Become a Member
Membership options are available for students, educators, government audit professionals, individual internal audit professionals, groups, and audit executives.
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Initiatives & Awards
The IIA's global initiatives and awards are designed to support and recognize individuals and teams in the internal audit profession.
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Internal Audit Resources
Explore the internal audit profession through key resources, frequently asked questions and more.
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The IIA's Latest
Keep up to date with what's happening in The IIA.
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Our Mission
The mission of The Institute of Internal Auditors is to advance the internal auditing profession and support internal auditors through:
- Promoting the value of internal auditing in business and government.
- Providing world-class professional education and certification programs.
- Advancing industry research on best practices in risk management, compliance, and governance.
- Bringing together internal auditors globally to foster collaboration and innovation.
We believe that strong internal audit practices create stronger organizations and a more accountable business environment.
How We Got Here – The History of Internal Auditing
Internal auditing has a long and evolving history, with roots tracing back centuries. However, modern internal auditing emerged as a profession in the early 20th century. The IIA played a pivotal role in its development, standardization, and global recognition.
1941 The IIA Is Founded
Victor Z. Brink publishes the first major book on internal auditing, and John B. Thurston establishes The IIA with 24 original members.
Global Expansion Begins
Membership surpasses 3,700, with 20% of members outside the U.S., marking the start of The IIA’s international reach.
1974 The CIA Certification Gains Global Recognition
The Certified Internal Auditor® (CIA®) credential becomes the global standard for internal auditors, recognized in organizations worldwide.
The IIA Today
Now with over 260,000 members, The IIA continues to advance internal audit practices, governance, and risk management worldwide.