## Inherent Limitations of an Audit (SA 200)

An audit provides reasonable assurance, not absolute assurance, that financial statements are free from material misstatement. Three categories of inherent limitation explain why absolute assurance is impossible.

### 1. Practical Limitations

Auditors test samples, not every transaction or balance.
Because only a subset of data is examined, some misstatements may escape detection even with a perfectly executed audit.

### 2. Legal Limitations

Management may refuse to provide complete information requested by the auditor.
The auditor has no legal power to compel disclosure.
If information is withheld, the auditor's only recourse is to report the limitation (e.g., qualify the opinion or disclaim).

### 3. Nature of Financial Reporting

Preparing financial statements requires management judgments — choice of depreciation method, inventory valuation method, provisions, estimates, etc.
These judgments involve subjectivity and uncertainty that the auditor cannot fully eliminate.
Additionally, management's internal controls may not have operated effectively, even if they were well designed.

### Key Premise of an Audit

The audit is conducted on the premise that management:

1. Acknowledges responsibility for preparing financial statements per the applicable reporting framework.

2. Acknowledges responsibility for designing and operating adequate internal controls.

Worked example

### Example 1

Q: An auditor selects 150 purchase invoices from 12,000 to verify the purchases figure. What type of inherent limitation does this illustrate?

A: Practical limitation. The auditor uses sampling rather than testing all transactions. Even a perfectly executed sample-based test may not detect misstatements in untested items.

### Example 2

Q: The CFO refuses to share the full schedule of related-party transactions, citing confidentiality. What type of limitation is this? What can the auditor do?

A: Legal limitation. The auditor cannot force the CFO to provide the information. The auditor can only report that required information was not made available — potentially modifying the audit opinion.

### Example 3

Q: A company switches from SLM to WDV depreciation. How does this relate to the 'nature of financial reporting' limitation?

A: Choosing a depreciation method is a management judgment. The auditor evaluates whether the chosen policy is appropriate and consistently applied, but the subjectivity of such choices means the auditor cannot provide absolute certainty — this is the 'nature of financial reporting' inherent limitation.

⚠️ Common exam mistakes

Stating that auditors provide 'absolute assurance' — the correct term is 'reasonable assurance'.
Treating all limitations as identical — the three categories (practical, legal, nature of reporting) are distinct and examiners expect you to identify which category applies.
Forgetting that even well-designed internal controls have inherent limitations and may not prevent or detect all errors.
Missing that the auditor's recourse to management non-disclosure is only to 'report' — not to independently investigate or compel disclosure.

Reference:

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SA 200 – Inherent Limitations of Audit

Worked example

⚠️ Common exam mistakes