Global Internal Audit Standards: A Practical GRC Guide

Purpose and structure

The Global Internal Audit Standards provide a professional framework for internal auditing. They organize expectations around the purpose of internal auditing, ethics and professionalism, governing the function, managing the function, and performing audit services. Together, these domains connect the mandate approved by the governing body with the way the function plans, delivers and improves its work.

Use in a GRC program

Organizations can use the Standards to assess whether internal audit has a clear mandate, appropriate independence, access to information, sufficient resources and a risk-informed plan. The governing body and senior management have distinct responsibilities: oversight should protect audit independence, while management remains responsible for operations and controls. Internal audit provides independent assurance and advice; it does not take over management's accountability.

Applying the Standards

Start by documenting the mandate, reporting lines, authority and access. Translate the organization's strategy and risk profile into a risk-based audit plan, then define engagement objectives, scope, criteria, procedures and evidence. Communicate results to the appropriate stakeholders, agree or track action plans, and monitor whether actions address the underlying exposure. A quality assurance and improvement program should evaluate conformance and identify opportunities to improve.

Decisions and measures

Useful measures include plan coverage of priority risks, overdue high-priority actions, engagement cycle time, stakeholder response, staff capability and quality assessment results. Interpret metrics with context: a high number of findings is not proof of effectiveness, and a low number is not proof that controls work. Report limitations and resource constraints transparently.

Boundaries

These Standards guide the internal audit profession; they are not a certification of the organization or evidence that every legal or regulatory obligation has been met. Adapt implementation to the function's mandate, applicable requirements and organizational context, and avoid presenting advisory work as independent assurance where independence could be impaired.