What it means
An internal auditor works inside the organisation but is meant to be independent of the activities being reviewed. They look at areas such as procurement, payroll, expense claims, sales processes and technology, and report on whether the controls are designed well and actually followed.
Their audience is usually the audit committee, a group of directors responsible for oversight. The CIA credential is built around the professional standards that govern internal auditing.
Candidates typically need a relevant educational background and work experience, must pass a multi-part exam, and must follow a code of ethics. Holders keep the title by completing ongoing professional education.
The day-to-day cycle begins with a risk assessment, which decides where audit time should go. The auditor then plans each review, gathers evidence by sampling transactions (testing a representative handful rather than every item) and interviewing staff, and writes up findings with a rating and a recommended fix.
Management responds with action plans and dates, and the auditor follows up later to confirm the fixes happened. For non-finance managers, the key point is that internal audit is a help rather than a threat.
A good report flags a control gap while it is still cheap to fix, such as one person being able to raise and approve the same payment. Teams that treat auditors as partners tend to hear about problems early, rather than from a regulator or a lender.
The nuance is the difference from external audit. An external auditor is appointed to give an opinion on the published financial statements, while an internal auditor covers a much wider range of risks, including operations, compliance and technology.
The two often share information, but their purposes and reporting lines differ.
In practice
Real-world examples.
Example
A food manufacturer's internal auditor tests a sample of 60 supplier payments and finds that 4 were released without a matching goods received note. The auditor recommends a system block on unmatched payments, and management agrees to switch it on within a month.
Example
A software company with offices in several countries asks its internal audit team to review how sales commissions are calculated. The auditor, a CIA, finds that two regions use different rules for deals signed late in the quarter. The finance team standardises the policy, recalculates the affected payments and tells the sales teams about the change in writing.
Example
A university's audit committee wants assurance that research grant money is spent as the funder requires. The internal auditor reviews a selection of grants, compares spending to the approved budgets, and reports a few cases where costs were charged to the wrong project.
Case study
Seen in the real world.
Ashgrove Health is a fictional chain of private clinics whose board had never received a structured view of operational risk. It hired an internal audit head with a CIA credential, who started by mapping the main risks and ranking them by likelihood and impact.
Her first review covered patient billing, where she found that discounts could be applied at reception without a second approval. She reported the gap, proposed a simple approval limit, and returned three months later to confirm that discounts above the limit were being authorised. Over the next year she extended the work to inventory counts and supplier onboarding, and reported quarterly to the audit committee. The board began to use her risk ranking when setting budgets and priorities, and the clinic managers started asking for her advice before launching new services.
This case is illustrative and the company is invented. It shows how internal audit works as a cycle of risk ranking, testing, reporting and follow-up, rather than a one-off inspection.
Watch out
Common mistakes.
- Thinking internal auditors are only there to catch fraud. Most of their work concerns whether processes are efficient, controlled and compliant.
- Letting the internal audit team report to the manager they are auditing. Independence is weakened when the auditor's boss is the person under review.
- Treating audit findings as a list to be closed quickly rather than problems to be understood. Fixing the symptom without the cause often means the issue returns, usually at a more awkward moment and a higher cost.
Questions
People also ask.
Is a CIA the same as a CPA?
No. A CPA is mainly an accounting and external audit credential, while a CIA focuses on internal audit practice and risk, and some professionals hold both.
Who does the internal audit head report to?
Ideally to the audit committee on functional matters, with an administrative link to a senior executive. This protects independence while keeping the function connected to the business.
How often should each area be audited?
It depends on risk. High-risk areas may be reviewed every year, while low-risk ones may be covered every few years.
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