AAT L4 Audit and Assurance Principles 3 — Questions and Answers

Question 1: An auditor discovers a material misstatement in the financial statements. Management refuses to adjust. The auditor should issue:

An unmodified opinion with an emphasis of matter paragraph
A qualified 'except for' opinion or an adverse opinion, depending on pervasiveness (Correct answer)
A disclaimer of opinion
An unmodified opinion, as management has the right to override the auditor

Correct answer: A qualified 'except for' opinion or an adverse opinion, depending on pervasiveness

When management refuses to correct a material misstatement, the auditor must modify the opinion. If the effect is material but not pervasive, a qualified opinion is given; if pervasive, an adverse opinion is required.

ISA 705 'Modifications to the Opinion in the Independent Auditor's Report' sets out when and how opinions are modified. A modification is required when the financial statements are materially misstated or when the auditor cannot obtain sufficient appropriate evidence. For a material misstatement that management refuses to correct: if the misstatement is material but NOT pervasive (affects a specific element but not the overall picture), a qualified opinion ('except for') is issued. If the misstatement is material AND pervasive (fundamental to users' understanding of the financial statements), an adverse opinion is required. 'Pervasive' means the misstatement affects multiple elements, or a single element that is fundamental to the statements. An adverse opinion states that the financial statements do NOT give a true and fair view. A disclaimer of opinion is reserved for situations where the auditor cannot obtain sufficient evidence (scope limitation) and the possible effects are both material and pervasive. An unmodified opinion with an emphasis of matter paragraph is used for properly presented matters the auditor wants to draw attention to (e.g., a properly disclosed going concern uncertainty), not for uncorrected misstatements.

Question 2: Which of the following is an example of a 'test of controls' rather than a substantive procedure?

Agreeing the total of the purchase ledger to the nominal ledger balance
Recalculating depreciation on a sample of non-current assets
Checking that purchase invoices above £5,000 have been authorised with a manager's signature (Correct answer)
Reviewing the aged receivables report for long-outstanding debts

Correct answer: Checking that purchase invoices above £5,000 have been authorised with a manager's signature

Checking for authorisation signatures tests whether the control (authorisation requirement) is operating effectively. This is a test of controls, not a substantive check of amounts.

Audit procedures fall into two broad categories. Tests of controls evaluate the operating effectiveness of internal controls — they answer 'Is this control working as intended?' Substantive procedures obtain audit evidence about amounts and disclosures in the financial statements — they answer 'Is this figure correct?' Checking for authorisation signatures on purchase invoices is a test of controls: it verifies that the authorisation control is functioning. It does not tell the auditor whether the amounts on those invoices are correct. The other options are all substantive procedures: agreeing the purchase ledger to the nominal ledger (reconciliation — substantive), recalculating depreciation (test of detail — substantive), and reviewing the aged receivables report (analytical procedure — substantive). In practice, tests of controls are performed during the interim audit (before year-end) when the auditor wants to rely on controls to reduce year-end substantive testing. If controls tests reveal that controls are not operating effectively, the auditor must increase substantive procedures to compensate for the higher control risk.

Question 3: A junior auditor is reviewing the inventory count procedures of a manufacturing client. Which procedure best tests the completeness assertion for inventory?

Selecting items from the inventory sheets and counting them in the warehouse
Selecting items from the warehouse floor and tracing them back to the inventory sheets (Correct answer)
Agreeing the total inventory value to the nominal ledger
Reviewing the last goods received notes before the year-end

Correct answer: Selecting items from the warehouse floor and tracing them back to the inventory sheets

Tracing from the physical inventory to the records tests completeness — ensuring all existing items have been recorded. Starting from the records tests existence (the opposite direction).

Direction of testing is fundamental to addressing specific assertions. The completeness assertion asks: 'Have all items that should be recorded actually been recorded?' To test this, the auditor starts with the population of real items (the warehouse floor) and checks they appear in the accounting records. Conversely, the existence assertion asks: 'Do all recorded items actually exist?' To test this, the auditor starts with the records and looks for the physical item. Starting from inventory sheets and finding the item in the warehouse tests existence (the recorded items are real). Starting from the warehouse and tracing to inventory sheets tests completeness (all real items are on the sheets). A good inventory count observation combines both directions to provide evidence on both assertions. This principle applies across all areas of audit: for payables, tracing from supplier statements to the ledger tests completeness; tracing from the ledger to supplier statements tests existence/valuation. Understanding the direction of testing is a key competency for AAT Level 4 auditing.

Question 4: What does 'professional scepticism' require of an auditor?

Assuming management is dishonest until proven otherwise
Maintaining a questioning mind and critically assessing audit evidence, without assuming good or bad faith (Correct answer)
Accepting management explanations only if supported by third-party evidence
Refusing to rely on any internal documents as they could be manipulated

Correct answer: Maintaining a questioning mind and critically assessing audit evidence, without assuming good or bad faith

Professional scepticism means maintaining a questioning mind and critically assessing evidence — it is neither automatic distrust nor automatic acceptance of management's assertions.

ISA 200 defines professional scepticism as 'an attitude that includes a questioning mind, being alert to conditions which may indicate possible misstatement due to error or fraud, and a critical assessment of audit evidence.' It requires auditors neither to assume management is dishonest nor to assume they are unquestioningly honest. In practice, professional scepticism means: corroborating verbal explanations with documentary or other evidence, being alert to contradictions between information sources, questioning the reasonableness of estimates and judgements, not being satisfied with less than sufficient appropriate evidence even if management appears credible, and recognising that an experienced auditor may identify situations where further investigation is warranted. Professional scepticism is particularly important in areas of accounting requiring significant judgement (e.g., provisions, fair values, going concern), where there is pressure to meet targets, or where the auditor has a long-standing relationship with a client (familiarity threat). The IAASB has emphasised that professional scepticism should be exercised throughout the audit, documented in working papers, and should be evident in team discussions, review procedures, and conclusions reached. Over-familiarity with a client can erode scepticism, which is one reason audit partner rotation is required.

Question 5: Which of the following is NOT a component of internal control under the COSO framework?

Control environment
Risk assessment
Audit opinion (Correct answer)
Monitoring activities

Correct answer: Audit opinion

The five COSO components of internal control are: Control Environment, Risk Assessment, Control Activities, Information and Communication, and Monitoring Activities. An 'audit opinion' is an auditor's output, not an internal control component.

The Committee of Sponsoring Organizations of the Treadway Commission (COSO) published an influential Internal Control — Integrated Framework that identifies five interrelated components of internal control. Control Environment: the tone set by management, including ethical values, governance structures, assignment of authority, and commitment to competence. Risk Assessment: the process for identifying and analysing risks to achieving objectives. Control Activities: the policies and procedures that help ensure management directives are carried out (authorisation, reconciliations, segregation of duties, physical controls). Information and Communication: the systems that capture and communicate relevant information to allow people to carry out their responsibilities. Monitoring Activities: processes to assess whether internal controls are present and functioning (internal audit, management review). An audit opinion is the conclusion that an external auditor forms and communicates after completing audit work — it is entirely external to the organisation's control framework. Understanding COSO is important for AAT Level 4 because it underpins how auditors document and evaluate a client's control environment during audit planning.

Question 6: An auditor is assessing materiality for a company with revenue of £5m, profit before tax of £200,000, and total assets of £3m. Using a benchmark of 5% of profit before tax, what would the planning materiality be?

£250,000
£10,000 (Correct answer)
£150,000
£100,000

Correct answer: £10,000

Planning materiality = 5% × £200,000 = £10,000. Materiality is applied to the chosen benchmark figure, not to revenue or total assets.

Materiality is a concept central to audit planning and execution. ISA 320 requires auditors to determine materiality at the planning stage to help focus audit work on areas that could have a significant impact on users' decisions. Planning materiality = 5% × £200,000 profit before tax = £10,000. Common benchmarks and typical percentage ranges include: 5–10% of profit before tax (most common for profitable companies), 0.5–1% of revenue (for loss-making companies or where revenue is more relevant), 1–2% of total assets, or 1–2% of equity. The choice of benchmark depends on the needs of likely financial statement users. For a small manufacturing company, profit is often the most relevant measure; for a charity, expenditure may be more appropriate. In addition to overall materiality, auditors set performance materiality (typically 50–75% of overall materiality) for individual items. This provides a buffer to ensure the total of individually immaterial misstatements doesn't accumulate to a material amount. A 'clearly trivial' threshold (often 5% of overall materiality) is also set below which misstatements need not be aggregated for evaluation.

AAT L4 Audit and Assurance Principles 3

An auditor discovers a material misstatement in the financial statements.
Management refuses to adjust.
The auditor should issue: