Recommended Guidance

Supplemental Guidance provides detailed guidance for conducting internal audit activities. These include topical areas, sector-specific issues, as well as processes and procedures, tools and techniques, programs, step-by-step approaches, and examples of deliverables.

Effective with the July 2015 launch of the New IPPF, all Practice Guides, Global Technology Audit Guides (GTAGs), and Guides to the Assessment of IT Risks (GAIT) automatically become part of the Recommended Supplemental Guidance layer.

Supplemental Guidance is restricted to IIA members only.

Non-members may purchase Supplemental Guidance by clicking on the links below. [ Click Here ]

Recommended Guidance
Implementation Guides assist internal auditors in applying the Standards. They collectively address internal auditing's approach, methodologies, and consideration, but do not detail processes or procedures.
Implementation Guides are free to IIA members.

All guides that were affected by the 2017 revisions to the Standards have been updated. For your convenience, Implementation Guides are available to download by individual title or grouped together in one document. These bundles are available in the following languages:

English (pdf)

International Standards for the Professional Practice of Internal Auditing (Standards)

Standards are principle-focused and provide a framework for performing and promoting internal auditing. The Standards are mandatory requirements consisting of:

-Statements of basic requirements for the professional practice of internal auditing and for evaluating the effectiveness of its performance. The requirements are internationally applicable at organizational and individual levels.
- Interpretations, which clarify terms or concepts within the statements.
- Glossary terms.

It is necessary to consider both the statements and their interpretations to understand and apply the Standards correctly. The Standards employ terms that have been given specific meanings as noted in the Glossary, which is also part of the Standards.

Revised Standards, Effective January 1, 2017

The International Internal Audit Standards Board (IIASB) released the revision to the Standards following consideration and approval by the International Professional Practice Framework Oversight Council (IPPFOC).

The Code of Ethics states the principles and expectations governing the behavior of individuals and organizations in the conduct of internal auditing. It describes the minimum requirements for conduct, and behavioral expectations rather than specific activities.

Introduction to the Code of Ethics

The purpose of The Institute's Code of Ethics is to promote an ethical culture in the profession of internal auditing.

Internal auditing is an independent, objective assurance and consulting activity designed to add value and improve an organization's operations. It helps an organization accomplish its objectives by bringing a systematic, disciplined approach to evaluate and improve the effectiveness of risk management, control, and governance processes.

A code of ethics is necessary and appropriate for the profession of internal auditing, founded as it is on the trust placed in its objective assurance about governance, risk management, and control.

The Institute's Code of Ethics extends beyond the Definition of Internal Auditing to include two essential components:

    1.Principles that are relevant to the profession and practice of internal auditing.
    2.Rules of Conduct that describe behavior norms expected of internal auditors. These rules are an aid to interpreting the Principles into practical applications and are intended to guide the ethical conduct of internal auditors.

"Internal auditors" refers to Institute members, recipients of or candidates for IIA professional certifications, and those who perform internal audit services within the Definition of Internal Auditing.

Applicability and Enforcement of the Code of Ethics
This Code of Ethics applies to both entities and individuals that perform internal audit services.

For IIA members and recipients of or candidates for IIA professional certifications, breaches of the Code of Ethics will be evaluated and administered according to The Institute's Bylaws and Administrative Directives. The fact that a particular conduct is not mentioned in the Rules of Conduct does not prevent it from being unacceptable or discreditable, and therefore, the member, certification holder, or candidate can be liable for disciplinary action.

Code of Ethics — Principles
Internal auditors are expected to apply and uphold the following principles:

    1. Integrity
    The integrity of internal auditors establishes trust and thus provides the basis for reliance on their judgment.
    2. Objectivity
    Internal auditors exhibit the highest level of professional objectivity in gathering, evaluating, and communicating information about the activity or process being examined.      Internal auditors make a balanced assessment of all the relevant circumstances and are not unduly influenced by their own interests or by others in forming judgments.
    3. Confidentiality
    Internal auditors respect the value and ownership of information they receive and do not disclose information without appropriate authority unless there is a legal or professional obligation to do so.
    4. Competency
    Internal auditors apply the knowledge, skills, and experience needed in the performance of internal audit services.

Rules of Conduct

1. Integrity

    Internal auditors:

    1.1. Shall perform their work with honesty, diligence, and responsibility.

    1.2. Shall observe the law and make disclosures expected by the law and the profession.

    1.3. Shall not knowingly be a party to any illegal activity, or engage in acts that are discreditable to the profession of internal auditing or to the organization.

    1.4. Shall respect and contribute to the legitimate and ethical objectives of the organization.

2. Objectivity

    Internal auditors:

    2.1. Shall not participate in any activity or relationship that may impair or be presumed to impair their unbiased assessment. This participation includes those activities or relationships that may be in conflict with the interests of the organization.

    2.2. Shall not accept anything that may impair or be presumed to impair their professional judgment.

    2.3. Shall disclose all material facts known to them that, if not disclosed, may distort the reporting of activities under review.

3. Confidentiality

    Internal auditors:

    3.1. Shall be prudent in the use and protection of information acquired in the course of their duties.

    3.2. Shall not use information for any personal gain or in any manner that would be contrary to the law or detrimental to the legitimate and ethical objectives of the organization.

4. Competency

    Internal auditors:

    4.1. Shall engage only in those services for which they have the necessary knowledge, skills, and experience.

    4.2. Shall perform internal audit services in accordance with the International Standards for the Professional Practice of Internal Auditing (Standards).

    4.3. Shall conti

The Definition of Internal Auditing states the fundamental purpose, nature, and scope of internal auditing.

Internal auditing is an independent, objective assurance and consulting activity designed to add value and improve an organization's operations. It helps an organization accomplish its objectives by bringing a systematic, disciplined approach to evaluate and improve the effectiveness of risk management, control, and governance processes.