Advanced Auditing, Assurance and Professional Ethics · Audit Planning, Strategy and Execution

SA 300: Planning an Audit of Financial Statements

Updated 5 October 2026 · Fact-checked

SA 300 requires the auditor to plan the audit so that it is performed effectively. Planning is not a single phase. It involves preliminary engagement activities, an overall audit strategy, a detailed audit plan, and documentation. To answer questions, state the requirement, apply it to the case facts, and conclude.

Understand SA 300: Planning an Audit of Financial Statements

Audit planning means deciding how the audit will be carried out before and while you carry it out. SA 300 says the auditor should plan the audit so that it is performed in an effective manner. Planning is not a one-time stage that ends before fieldwork. It is a continual and iterative process, often starting soon after the previous audit ends and continuing until the current audit is completed.

Good planning helps you give appropriate attention to important areas, identify and resolve potential problems on time, and organise and manage the engagement so it is performed in an effective and efficient manner. It helps you select team members with suitable capabilities and assign work to them. It also helps in directing and supervising the team and reviewing their work. Where relevant, it helps in coordinating the work of component auditors and experts.

SA 300 expects the engagement partner and other key members of the team to be involved in planning. This includes planning the audit and taking part in discussion among team members. The discussion is about the susceptibility of the financial statements to material misstatement, as SA 315 and SA 240 also require.

At the beginning of the current audit engagement, you carry out preliminary engagement activities. These are: performing the procedures required by SA 220 (Revised) on continuance of the client relationship and the specific audit engagement, under the firm's quality management (SQM 1); evaluating compliance with ethical requirements, including independence; and establishing an understanding of the terms of engagement as SA 210 requires.

Then you establish the overall audit strategy, which sets the scope, timing and direction of the audit and guides the detailed audit plan. The plan covers the nature, timing and extent of risk assessment procedures, further audit procedures, and other procedures needed to comply with the SAs. Finally, you document the strategy, the plan and any significant changes made during the audit, with reasons.

Key rules to remember

Objective of SA 300: Plan the audit so that it is performed in an effective manner; Planning is continual and iterative, not a one-time phase.
Preliminary engagement activities (three): 1) Quality management procedures on client continuance and engagement; 2) Evaluate ethical compliance including independence; 3) Establish understanding of terms of engagement (SA 210); Done at the beginning of the current audit engagement.
Overall audit strategy: Sets scope, timing and direction of the audit and guides the audit plan; Covers characteristics of the engagement, reporting objectives, significant factors, preliminary activities and nature, timing and extent of resources.
Audit plan contents: Nature, timing and extent of (a) risk assessment procedures, (b) further audit procedures, (c) other planned procedures to comply with SAs; The plan is more detailed than the strategy.
Documentation: Document (a) overall audit strategy, (b) audit plan, (c) any significant changes made during the audit and the reasons; Form and extent depend on entity size and complexity.
Direction, supervision and review: Plan the nature, timing and extent of direction and supervision of team members and review of their work; Depends on factors such as entity complexity, assessed risks and team capabilities.

How to solve SA 300: Planning an Audit of Financial Statements questions

Use this method for any SA 300 question, whether theory or case-based.

1Identify what is asked: importance of planning, preliminary activities, strategy versus plan, team involvement, or documentation.
2State the SA 300 requirement in one clear sentence.
3List the components in order. For preliminary activities, give the three items. For planning, separate strategy from plan.
4Link each point to the facts in the case, such as a new client, first-year audit, change in management or IT systems.
5Mention any related standard briefly, such as SA 210, SA 315, SA 240 or SA 320, where the case points to it.
6Note that planning is iterative and any changes must be documented with reasons.
7Conclude with a direct answer to what the question asked.

Quickest way: Three-block recall for SA 300

When to use it: Use when you have under ten minutes for a 5-mark theory answer or a short MCQ.

Block 1, Before: preliminary activities (continuance, ethics and independence, engagement terms).
Block 2, During: strategy first (scope, timing, direction), then plan (risk assessment, further procedures, other procedures), with direction, supervision and review.
Block 3, After and ongoing: document strategy, plan and significant changes with reasons.
For MCQs, check whether the option mixes the strategy with the plan, or calls planning a one-time phase. Reject such options.

Common mistakes in SA 300: Planning an Audit of Financial Statements

Treating planning as a one-time phase done before fieldwork.
Textbooks list planning as a first step in the audit sequence.
Fix: Write that planning is continual and iterative, and can be revised as unexpected events or evidence arise.
Confusing overall audit strategy with audit plan.
Both sound alike and both are planning documents.
Fix: Strategy is the broad scope, timing and direction. The plan is the detailed procedures. The plan is developed after and guided by the strategy.
Missing one of the three preliminary engagement activities.
Students remember only the engagement letter.
Fix: Recall: continuance and engagement quality procedures, ethics including independence, and terms of engagement.
Leaving out documentation of significant changes and reasons.
Students stop at documenting the strategy and plan.
Fix: Always add: document significant changes made to the strategy or plan during the audit, and the reasons for them.
Writing generic answers without using the case facts.
Students rush to reproduce the standard.
Fix: Pick out facts in the scenario, such as first-year audit or new accounting software, and show how each affects planning.

Worked examples

Example 1

CA Meera is appointed statutory auditor of Alpha Ltd for the first time. She begins fieldwork immediately after signing the engagement letter. The partner says that planning will be done once the team sees the books. Evaluate this approach with reference to SA 300.

Show the solution

Requirement: SA 300 requires the auditor to plan the audit so that it is performed effectively.
Planning is not a phase after fieldwork begins. It starts at the beginning of the engagement with preliminary activities and continues throughout.
Signing the engagement letter covers only the SA 210 activity, that is, the understanding of the terms of engagement. Meera must also perform procedures on client continuance and the specific engagement under the quality management standards, and evaluate compliance with ethical requirements including independence.
She must establish an overall audit strategy for scope, timing and direction, and then develop the audit plan. This must happen before fieldwork, not after the team sees the books.
The engagement partner and other key team members must take part in planning before fieldwork, including the discussion on susceptibility to material misstatement.
Because it is a first-year audit, extra planning attention is needed. Under SA 510, she must plan procedures to obtain sufficient appropriate audit evidence on opening balances, and she must also build her understanding of the entity.

Answer: The approach is incorrect. The engagement letter covers only the terms of engagement. Meera must also perform the other preliminary engagement activities, set the overall audit strategy and develop the audit plan before fieldwork, with the engagement partner and key team members involved. As it is a first-year audit, she must plan opening balance procedures under SA 510. Planning cannot be postponed until the books are seen, and it must be revised as needed.

Example 2

During the audit of Beta Ltd, the auditor plans to rely on controls over sales. In testing, she finds that the controls fail frequently. She decides to extend substantive testing and change the planned timing of procedures. She has not recorded this anywhere. Advise her under SA 300.

Show the solution

Planning is iterative. Changes in circumstances or unexpected audit evidence can require revising the strategy and plan.
Here, failure of controls changes the assessed risk, so a change in the nature, timing and extent of further audit procedures is appropriate.
SA 300 requires documentation of the overall audit strategy, the audit plan and any significant changes made during the audit engagement, with the reasons for the changes.
The change from reliance on controls to extended substantive testing and revised timing is significant.
Failure to record it would leave the working papers incomplete.

Answer: Revising the plan is correct. She must document the significant change to the strategy and plan together with the reasons, namely the control failures and the resulting increase in assessed risk.

Exam tips

For 'preliminary engagement activities', always give the three items in order and add one line on why each matters.
In case-based MCQs, watch for options that call planning a discrete phase or mix up strategy and plan. These are usually wrong.
For documentation questions, include strategy, plan and significant changes with reasons, and mention that form and extent depend on entity size and complexity.
In written answers, use provision, facts, conclusion. Quote the requirement, apply the facts, then give a clear conclusion.
Link planning to risk assessment, materiality and team direction in a line or two. It shows integrated understanding.

Practice questions from Audit Planning, Strategy and Execution

SA 300: Planning an Audit of Financial Statements in other exams

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

SA 300: Planning an Audit of Financial Statements: frequently asked questions

What are preliminary engagement activities in SA 300?

They are performed at the start of the current audit. They are quality management procedures on continuance of the client relationship and the engagement, evaluating ethical compliance including independence, and establishing an understanding of the terms of engagement.

What is the difference between overall audit strategy and audit plan?

The overall audit strategy sets the scope, timing and direction of the audit. The audit plan is more detailed and covers the nature, timing and extent of specific procedures. The strategy guides the plan.

Is audit planning a one-time activity?

No. SA 300 treats planning as continual and iterative. You may update the strategy and plan as the audit progresses and new information emerges.

How do I document audit planning as per SA 300?

Document the overall audit strategy, the audit plan, and any significant changes made during the audit with the reasons. The form and extent depend on the size and complexity of the entity and the engagement.