Skip to content

ACCA Applied Skills · Audit and Assurance

External Audits for ACCA Audit and Assurance

An external audit is an independent examination of financial statements, ending in an opinion on whether they give a true and fair view or are presented fairly, in all material respects, under the reporting framework. Directors prepare the statements. Auditors give the opinion. To solve questions, separate who does what, then match the assurance level.

What this chapter covers

This chapter is the foundation of Audit and Assurance (AA). It explains why audits exist, who is responsible for what, what level of comfort an auditor gives, and how an external audit differs from other services. Every later chapter assumes you know this.

You will cover the purpose of an audit, the split between directors' and auditors' duties, reasonable and limited assurance, statutory audit requirements and exemptions, auditor appointment, and the contrast between internal and external audit. Expect plenty of definitions, but the exam tests whether you can apply them to a short scenario.

The chapter links to the rest of the paper. Ethics, risk assessment, internal control, audit evidence, completion and reporting all build on these ideas. The audit opinion in the reporting chapter only makes sense if you already understand the auditor's responsibility and the meaning of assurance.

AA is examined through objective test cases and constructed response questions, and both draw on this chapter's vocabulary. Questions on responsibilities, assurance levels and audit versus review are quick marks in Section A and in the OT cases, where each answer is all or nothing. The ideas also support your written answers in Section B, where you must explain concepts clearly in a scenario. Getting this chapter right early makes every later chapter easier to learn.

External audits: topics in the order to study them

  1. 1Nature and Purpose of External AuditStart here: it defines the audit, the opinion and the reason audits exist, which everything else builds on.
  2. 2Responsibilities of Directors and AuditorsOnce you know what an audit is, you need to separate management's duties from the auditor's, a favourite exam point.
  3. 3Reasonable vs Limited Assurance and Types of EngagementThis extends the audit idea to other engagements and shows how the level of comfort changes the work and the wording.
  4. 4Statutory Audit, Exemptions and Auditor AppointmentWith the concepts clear, you can learn who must have an audit and how auditors are appointed, which is rule-based and easier to retain afterwards.
  5. 5Internal vs External Audit and Other Assurance ServicesFinish with comparisons, which are easier once you know both external audit and the assurance spectrum.

How to prepare External audits

Aim to understand the logic first, then drill the distinctions that objective test questions use.

  1. Read the purpose of audit and write the definition in your own words, including what the opinion covers and what it does not.
  2. Build a two-column table of directors' and auditors' responsibilities, and test yourself by covering one column.
  3. Learn reasonable and limited assurance by comparing the level of work, the form of conclusion (positive or negative) and an example of each engagement.
  4. Note the statutory audit and exemption rules as your syllabus and variant present them, and learn who appoints, removes and pays the auditor.
  5. Compare internal and external audit on objective, reporting line, independence and scope, then list other assurance services.
  6. Practise objective test questions on each topic, and review every wrong answer to find which distinction you missed.
  7. Answer one written scenario question, applying a point to the facts instead of reciting definitions.

Common mistakes in External audits

  • Saying the auditor is responsible for preparing the financial statements or the internal controls.

    Fix: Write directors prepare and control; auditors examine and opine. Check each option against that split.

  • Describing an audit as giving absolute assurance or a guarantee of no fraud.

    Fix: Use the phrase reasonable assurance and mention testing, judgement and the nature of evidence.

  • Mixing up reasonable and limited assurance, including the form of conclusion.

    Fix: Tie each to an engagement: audit gives a positive opinion; review gives a negative form of conclusion.

  • Treating internal and external audit as the same service with different names.

    Fix: Compare objective, who they report to, independence and scope every time.

  • Memorising exemption or appointment rules without reading the scenario facts.

    Fix: Underline the facts given, then apply the rule step by step to decide the outcome.

  • Giving a definition in written answers instead of applying it.

    Fix: State the point, link it to the scenario fact, and give the consequence in one or two sentences.

Last-day revision: External audits

  • An audit gives an opinion on whether financial statements are true and fair or fairly presented, in all material respects.
  • Directors prepare the financial statements; auditors express an opinion on them.
  • The audit adds credibility for users such as shareholders, lenders and other stakeholders.
  • An audit gives reasonable assurance, which is high but not absolute.
  • A review gives limited assurance, with a negative form of conclusion.
  • Audit opinions are positive in form; limited assurance is negative in form.
  • Directors are responsible for internal control and for preventing and detecting fraud.
  • Auditors are not responsible for preparing the statements or for guaranteeing no error or fraud.
  • Limitations such as testing, judgement and persuasive evidence mean assurance cannot be absolute.
  • External auditors are independent of the company; internal audit is part of the organisation.
  • Internal audit mainly serves management; external audit mainly serves shareholders.
  • Always apply the point to the scenario instead of reciting a definition.

External audits in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

External audits: frequently asked questions

What is the main purpose of an external audit?

Its purpose is to give users an independent opinion on whether the financial statements are true and fair or fairly presented, in all material respects. This increases confidence in the information. It does not guarantee the company is well run or free of fraud.

What is the difference between reasonable and limited assurance?

Reasonable assurance is a high but not absolute level, given in an audit through a positive opinion. Limited assurance is lower, given in a review through a negative form of conclusion. Less work is done for limited assurance.

Who is responsible for the financial statements, the directors or the auditor?

The directors are responsible for preparing them and for the internal controls behind them. The auditor is responsible for forming and expressing an opinion on them. Exam questions often test this split.

How is external audit different from internal audit?

External audit is independent of the company and reports on the financial statements, mainly to shareholders. Internal audit is part of the organisation and mainly helps management by reviewing controls, risk and operations. The scope and reporting line also differ.

How should I practise this chapter for the exam?

Do objective test questions on each topic and review the reason for each wrong answer. Then write one short scenario answer that applies a rule to the facts. This covers both the objective tests and the written section.