Audit and Assurance · Audit planning and documentation

Preliminary Engagement Activities and Engagement Letters in ACCA AA

Updated 11 October 2026 · Fact-checked

Preliminary engagement activities are the checks an auditor does before accepting an audit: ethics, independence, competence, resources, client integrity and contact with the predecessor auditor. The engagement letter then records the agreed terms under ISA 210, including scope, responsibilities, the reporting framework and the form of the report.

Understand Preliminary Engagement Activities and Engagement Letters

Before an auditor starts any audit, they must decide whether to take it on. ISA 300 and ISA 210 expect the auditor to do preliminary engagement activities first. The aim is simple: do not accept work you cannot do properly, ethically or safely.

There are three groups of checks. First, ethics and independence: are there threats from self-interest, self-review, familiarity, intimidation or advocacy, and can safeguards reduce them to an acceptable level? Second, competence and resources: does the firm have the staff, time, sector knowledge and (if needed) specialists to complete the audit by the deadline? Third, client integrity and risk: who are the owners and managers, what is their reputation, is there any sign of money laundering, and is the client's business risk acceptable?

For a new client, the incoming auditor must also ask the client's permission to contact the predecessor (existing) auditor. If the client refuses, the incoming auditor should consider carefully whether to accept at all, because a refusal is a warning sign. The incoming auditor then asks the predecessor, in writing, whether there are any professional reasons not to accept. The predecessor needs the client's consent before answering, because of confidentiality. Also check that the outgoing auditor's removal or resignation was handled properly and that the new appointment is valid under local law.

Once you decide to accept, you agree the terms with management (or those charged with governance) and record them in an engagement letter. It avoids misunderstandings about what the audit covers and who is responsible for what. It is sent before the audit starts. For recurring audits, the auditor considers each year whether the terms need revising and whether to remind the client of them.

Do not confuse it with the letter of representation (ISA 580). The engagement letter is issued by the auditor at the start and sets out terms. The representation letter is written by management near the end of the audit and confirms matters to the auditor.

Key rules to remember

Preconditions for an audit (ISA 210): Acceptable financial reporting framework + management agrees to its responsibilities; Management must accept responsibility for preparing the financial statements, for internal control, and for giving the auditor access to information and people.
Typical engagement letter contents: Objective and scope; auditor's responsibilities; management's responsibilities; framework; form of report; other matters; Other matters often include fees and billing, timing, limitation of liability, use of experts or internal auditors, and reporting of any other communications.
Acceptance checks memory aid: Ethics, Independence, Competence, Resources, Integrity, Predecessor; Use it to structure any acceptance answer. Add legal validity of appointment and money laundering where the scenario hints at them.
Recurring audits: Consider each period whether terms need to be revised; Revise if there is a change in management, ownership, nature of business, legal requirements or the reporting framework.
Engagement letter vs representation letter: Engagement letter: auditor to client, at start, terms. Representation letter: management to auditor, at end, confirmations; A very common exam comparison.

How to solve Preliminary Engagement Activities and Engagement Letters questions

Use this method for any scenario or written question on acceptance or engagement letters.

1Read the requirement and decide whether it asks for acceptance matters, engagement letter contents, or the difference between letters.
2Underline scenario facts: new client, change of owner, a director who is also a friend, a tight deadline, unusual fees, a refused predecessor contact.
3For acceptance, work through ethics and independence, competence and resources, integrity and risk, then predecessor communication.
4Link each point to a fact in the scenario. State the threat or issue, then the action or safeguard.
5For engagement letters, list the content under headings: scope, responsibilities, framework, report form, practical terms.
6Give a clear conclusion where asked, such as accept, accept with safeguards, or decline.
7Check your answer has the same number of points as the marks available, and that each point is explained rather than only named.

Quickest way: Six-letter acceptance scan

When to use it: Use in Section B OT cases and short Section C written parts when time is tight.

Write the memory aid on your rough note: Ethics, Independence, Competence, Resources, Integrity, Predecessor.
Tick each item as the scenario mentions it. The facts given usually point at the issue being tested.
For an OT question, eliminate options that confuse the letters or give a wrong party, for example management writing the engagement letter.
For a letter-contents question, think scope, responsibilities, framework, report, practical terms and give one fact for each.
Answer the exact requirement first, then add the reason.

Common mistakes in Preliminary Engagement Activities and Engagement Letters

Mixing up the engagement letter and the letter of representation.
Both are letters with the word management or auditor in them and both are linked to ISA numbers.
Fix: Remember the direction and timing: the engagement letter goes from the auditor at the start; the representation letter comes from management at the end.
Listing acceptance checks without applying them to the scenario.
Students memorise the list and write it out generically.
Fix: Pick the facts in the scenario, name the issue, and give the action. One applied point earns more than three bare headings.
Saying the auditor can contact the predecessor without asking the client.
Students forget confidentiality.
Fix: State that the incoming auditor asks the client for permission first. If permission is refused, consider whether to decline the engagement.
Omitting management's responsibilities from the engagement letter contents.
Students focus on what the auditor does.
Fix: Always include management's duties: preparing the financial statements, maintaining internal control, and giving access to information and people.
Thinking an engagement letter is only needed for new clients.
Students link letters to acceptance only.
Fix: For continuing audits, the auditor decides each year whether the terms need revising or the client needs a reminder of them.
Treating the engagement letter as proof that the audit will find fraud or error.
Confusion about auditor responsibilities.
Fix: The letter explains that the audit provides reasonable, not absolute, assurance and that management stays responsible for preventing and detecting fraud.

Worked examples

Example 1

Your firm has been asked to audit Kora Ltd, a new client. The finance director is the brother of one of your audit managers, and the client wants the audit done within three weeks. Explain the matters to consider before accepting the engagement. (6 marks)

Show the solution

Ethics: the family relationship is a familiarity threat to independence. Safeguards include keeping the manager off the audit and telling the engagement partner. If the threat cannot be reduced to an acceptable level, the firm should decline.
Resources: a three-week deadline may be too short. Check staff availability and whether the timetable allows enough work to reach a safe opinion.
Competence: check whether the firm has experience of Kora Ltd's industry and whether specialists would be needed.
Integrity: obtain information on the owners and directors, and consider any money laundering concerns through client due diligence.
Predecessor: ask Kora Ltd for permission to contact the previous auditor, then ask in writing whether there are any professional reasons not to accept. A refusal of permission should be treated with caution.
Appointment: confirm the appointment is legally valid and that the former auditor was properly removed or has left.

Answer: Accept only if the familiarity threat is properly safeguarded, the three-week deadline is realistic, the firm has the competence and resources, the client has integrity, and the predecessor auditor raises no concerns. Otherwise, decline.

Example 2

Which TWO of the following statements about engagement letters are correct? A) The engagement letter is prepared by management after the audit. B) It sets out the scope of the audit and the respective responsibilities of auditor and management. C) For a continuing audit, the auditor considers each year whether the terms need revising. D) It replaces the need for a letter of representation.

Show the solution

A is wrong: the engagement letter is sent by the auditor before the audit starts, not by management after it.
B is correct: scope and the responsibilities of both parties are core contents of the letter under ISA 210.
C is correct: for recurring audits, the auditor decides whether terms need revising, for example after a change in management or the reporting framework.
D is wrong: the letter of representation is a separate document from management near the end of the audit and is still required.

Answer: B and C are correct.

Exam tips

Structure acceptance answers with the six headings and tie every point to a scenario fact. The scenario is usually built to trigger two or three of them.
Use ISA 210 wording for the engagement letter: scope, responsibilities of both sides, framework, form of the report. Add practical terms such as fees last.
In OT questions, check who writes the letter and when. This is the standard trap in options.
If asked for a conclusion, give a firm one: accept, accept with safeguards, or decline, with a one-line reason.
Learn the predecessor sequence: client permission, then written enquiry, then consider the reply. Never skip the permission step.

Preliminary Engagement Activities and Engagement Letters in other exams

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

Preliminary Engagement Activities and Engagement Letters: frequently asked questions

What is included in an engagement letter under ISA 210?

It states the objective and scope of the audit, the auditor's responsibilities, management's responsibilities, the financial reporting framework, and the expected form of the report. It may also cover fees, timing and limits on liability.

How do you accept a new audit client in ACCA AA?

Check ethics and independence, competence and resources, and the client's integrity and risk. Ask the client's permission to contact the predecessor auditor, then enquire in writing. If all is satisfactory, agree terms and send the engagement letter.

What is the difference between an engagement letter and a letter of representation?

The engagement letter comes from the auditor at the start of the audit and records the agreed terms. The letter of representation comes from management near the end and confirms matters to the auditor, supporting but not replacing audit evidence.

Does the auditor need a new engagement letter every year?

Not always. The auditor considers each year whether the terms need revising or whether the client should be reminded of the existing terms. Changes in management, ownership, business or legal requirements usually mean a new letter.