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0Audit Charter: CISA Exam focused Summar
What is an Audit Charter?
- A formal document that establishes the IS Audit function within an organization.
- Acts as the starting point for forming the IS Audit Department.
- Applies to internal IS audit departments only. For external IS audit firms, the equivalent is an engagement letter / appointment letter.
Key Contents of Audit Charter:
- Authority — overall powers of the IS audit department (access to data, systems, personnel across departments).
- Scope — what areas/systems IS audit covers.
- Responsibility — reporting lines, frequency of audits, accountability.
Audit Charter Approval & Audit Reporting:
- Approved by the highest level of management — the Audit Committee (or Board).
- IS Audit Department reports to the Audit Committee → ensures Independence.
- Created by top management so other departments take it seriously.
Audit Charter Change management
- Once formed, the audit charter should NOT be changed frequently.
- Changes are allowed only when justifiable (e.g., major business/regulatory shift).
- Periodic review of the charter is required to keep it aligned with business needs.
ISACA Category for Audit Charter
Audit Charter falls under the General Standards category (applicable before/at the start of the audit), alongside Organizational Independence, Professional Independence, Due Professional Care, Reasonable Expectation, Assertions & Criteria.
Audit Charter : One-Minute CISA Exam Revision Notes
- Audit Charter = formal governance document establishing the IS audit function
- Defines Authority, Scope, Responsibility
- Approved by the Board / Audit Committee (highest level of management)
- Ensures auditor independence through authority, reporting to the audit committee.
- Internal IS audit → governed by Audit Charter
- External IS audit firm → governed by Engagement Letter
- IS Audit reports to the Audit Committee (best practice for independence)
- Auditors evaluate controls; management implements controls
- Charter stays broad and stable — changed only when justified
- Detailed procedures belong in audit programs, not the charter
- Falls under ISACA General Standards (applies before the audit starts)
- Grants auditor’s right of access across the organization
Audit Charter : One-line takeaway
The Audit Charter = a board-approved mandate defining the IS audit function’s Authority, Scope, and Responsibility, ensuring independence by reporting to the Audit Committee.