Cost and Management Audit · Cost Audit Documentation, Audit Process and Execution

Cost Audit Process: Planning, Execution and Reporting

Updated 11 October 2026 · Fact-checked

The cost audit process is the sequence a cost auditor follows: confirm the appointment and ethics, understand the terms, plan the strategy and audit plan, assess risk, perform procedures that respond to that risk to gather evidence, conclude and report. Planning is continuous, not a one-time phase. Answer exam questions in this order.

Understand Cost Audit Process: Planning, Execution and Reporting

A cost audit is not just checking figures at the end of the year. It is a staged process. Each stage depends on the one before it, and the auditor can go back and change earlier decisions when new facts appear.

The process starts before planning. Under SCA 101 (para 5.1), before entering the planning phase the cost auditor must ensure that: (a) the appointment is proper, the letter of appointment is received and legal formalities are complied with; (b) the ethical requirements continue to be satisfied; and (c) there is an understanding of the terms of reference, such as the units and products or services to be covered, where the regulations leave scope to be agreed.

The ethics check (para 5.1 (b)) is explained in para 6.3. Before other significant work on the current year's audit, the auditor must ensure two things after accepting the appointment:

There is no change in his position that impedes his arm's length relationship with the entity. For example, accepting an assignment to design and implement the entity's cost accounting system.
No issue about management integrity has cropped up that may affect his willingness to continue the engagement.

Next comes planning. SCA 101 (para 6.2) says planning is not a discrete phase of an audit but a continuous and iterative process. It includes scheduling, which means deciding the priority of audit procedures and how they depend on each other. Risk assessment procedures are planned early. The audit plan includes the nature, extent and timing of risk assessment, audit procedures and other activities (para 5.5). It is more detailed than the overall audit strategy (para 6.6). Planning the specific further procedures depends on the outcome of the risk assessment, so risk assessment comes first.

Then comes execution. You gather audit evidence by procedures such as observation, external confirmation, re-performance and analytical procedures. SCA 107 (para 6.5) also gives examples of cost audit procedures on the cost records: analysis and review, reperforming the procedures followed in the cost reporting framework, and reconciling related types and applications of the same information. These are examples, not a fixed list. Evidence is judged for reliability. Consistent evidence from different sources gives more assurance than one item alone (para 6.6). The aim is reasonable assurance that the cost statements as a whole are free from material misstatement, whether due to fraud or error (SCA 108, para 6.1).

Finally you conclude on the evidence and report. If unexpected events, changed conditions or audit results make it necessary, the auditor may need to modify the overall strategy and plan (SCA 101, para 6.8). Documentation of the work and the form of reporting are dealt with in their own standards (see the related topics), not in the SCA 101, 107 or 108 paragraphs cited here.

Key rules to remember

Pre-planning checks: Proper appointment + ethics satisfied + terms of reference understood; SCA 101 para 5.1 (a), (b), (c). Do these before the planning phase. Para 6.3 adds two checks after acceptance: no impairment of arm's length position and no management integrity issue.
Audit plan content: Audit plan = nature + extent + timing of risk assessment, audit procedures and other activities; SCA 101 para 5.5. The plan is more detailed than the overall strategy (para 6.6). Specific further procedures depend on the outcome of risk assessment.
Planning nature: Planning = continuous and iterative, not a discrete phase; SCA 101 para 6.2. Risk assessment procedures are planned early.
Modifying the plan: Unexpected events / changed conditions / audit evidence → auditor may need to modify strategy and plan; SCA 101 para 6.8. The standard says 'may need to'; the decision is a matter of judgement.
Objective of the audit: Reasonable assurance that cost statements are free from material misstatement (fraud or error); SCA 108 para 6.1. Achieved by sufficient appropriate audit evidence that reduces audit risk to an acceptably low level.
Evidence procedures: Observation, external confirmation, re-performance, analytical procedures; examples on cost records: analysis and review, reperformance, reconciliation; SCA 107. Para 6.5 gives analysis and review, reperformance and reconciliation as examples of procedures to test cost records, not a fixed list. Observation is limited to the point in time it takes place (para 6.11). Re-performance is independent execution of procedures or controls (para 6.14).

How to solve Cost Audit Process: Planning, Execution and Reporting questions

Use the process order as your answer skeleton. It fits questions on planning, execution, evidence or the whole audit cycle.

1Read the question and mark what is asked: whole process, one stage, or a case with a problem.
2Start with pre-planning: valid appointment and letter, ethics, and terms of reference including units and products covered. Add the para 6.3 checks on arm's length relationship and management integrity.
3Write planning: overall strategy, then audit plan with nature, timing and extent, with risk assessment early.
4For an initial engagement, add extra planning: consult the previous auditor, review earlier working papers if law permits, and verify opening balances such as inventory.
5Describe execution: procedures chosen, type of evidence, and how reliability is judged.
6Link each step to the case facts, for example a changed condition that may force a plan modification.
7Conclude: assess evidence against reasonable assurance, then report. Mention documentation and reporting as governed by their own standards.
8Quote the SCA paragraph where you are sure of it.

Quickest way: Five-block answer frame

When to use it: For 4 to 7 mark theory questions when time is short.

Write 'Before planning' and list the three SCA 101 para 5.1 checks.
Write 'Planning' with strategy, plan, and the nature, timing, extent line.
Write 'Execution' with two or three evidence procedures and one line on reliability.
Write 'Revision' with the para 6.8 triggers.
Write 'Conclusion and report' with reasonable assurance in one line.

Common mistakes in Cost Audit Process: Planning, Execution and Reporting

Treating planning as a one-time phase at the start.
Textbook flowcharts show planning as a single box.
Fix: State that planning is continuous and iterative (SCA 101 para 6.2) and can be modified later.
Jumping straight to planning without acceptance checks.
Students think the audit begins with risk assessment.
Fix: Begin with proper appointment, ethics and terms of reference under para 5.1.
Mixing up the overall strategy and the audit plan.
Both look like planning documents.
Fix: Say the plan is more detailed and sets nature, timing and extent of procedures.
Saying observation gives evidence valid for the whole year.
Observation feels strong and direct.
Fix: Note that it only covers the point in time of observation, and being observed may change how the process is performed.
Ignoring initial-audit extras.
Students write one generic answer for every engagement.
Fix: For a first-year audit, add previous auditor consultation, working paper review and opening balance procedures.

Worked examples

Example 1

Before starting planning for a cost audit of a manufacturing company, what must the cost auditor ensure under SCA 101? (4 marks)

Show the solution

The source is SCA 101 para 5.1, which applies before entering the planning phase.
First, the appointment is proper, the letter of appointment is received and the legal formalities are complied with.
Second, ethical requirements as per the regulations continue to be satisfied.
Third, there is an understanding of the terms of reference: units, products or services covered, and scope where it is left to be agreed between auditor and auditee.

Answer: The auditor must confirm a proper appointment with letter and formalities, continued ethical compliance, and an understanding of terms of reference covering units, products or services and agreed scope.

Example 2

Midway through the audit, the auditor finds that the unit's input-output norms differ sharply from actual consumption observed on the shop floor. How should the auditor respond in planning terms? (5 marks)

Show the solution

Planning is continuous and iterative (SCA 101 para 6.2), so it does not stop after the first plan.
Unexpected events, changed conditions or audit evidence from procedures may mean the auditor needs to modify the strategy and plan (para 6.8). The standard says 'may need to'; it is a matter of judgement.
In this scenario the difference is large, so the auditor would likely extend the nature, timing or extent of procedures on material consumption.
Observation is limited to the point in time it occurs (SCA 107 para 6.11), so the auditor looks for corroboration. Para 6.6 says corroborating information obtained from a source independent of the entity, for example third-party confirmation or benchmarking data, increases the assurance obtained from internally generated evidence such as analysts' reports and input-output norms.
Re-performance (para 6.14) is one further procedure the auditor may use. Consistent evidence from different sources gives more assurance than one item alone (para 6.6).

Answer: The auditor may need to revise the strategy and plan and, in this case, would likely extend procedures on material consumption as a matter of judgement. The auditor corroborates the observation with other evidence and then concludes on reasonable assurance.

Exam tips

Use the process order as headings in long answers so the examiner sees structure.
Cite SCA 101 para 5.1, 5.5, 6.2, 6.3 and 6.8 only where you are sure; marks come mostly from the idea.
In case scenarios, tie your answer to the facts given, such as a first-year engagement, a change in conditions, or the auditor taking up a cost system design assignment (para 6.3).
Section A MCQs often test one-line points: plan is more detailed than strategy; planning is continuous; observation is point-in-time.
Documentation and reporting come from their own standards. Do not attach them to SCA 101, 107 or 108 paragraphs.
Do not write the filing rules here; keep the answer on process unless asked.

Practice questions from Cost Audit Documentation, Audit Process and Execution

Cost Audit Process: Planning, Execution and Reporting in other exams

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

Cost Audit Process: Planning, Execution and Reporting: frequently asked questions

What are the main steps of the cost audit process?

Confirm appointment, ethics and terms of reference. Plan the strategy and audit plan, starting with risk assessment. Perform procedures that respond to the assessed risk to obtain evidence. Conclude and report, with documentation as required by its own standard.

What is the difference between audit strategy and audit plan?

The audit plan is more detailed than the overall strategy. It sets the nature, timing and extent of procedures to be performed by team members (SCA 101 para 6.6).

Can the audit plan change after it is prepared?

Yes. Unexpected events, changes in conditions or evidence from procedures may mean the auditor needs to modify the strategy and plan (SCA 101 para 6.8).

What extra planning is needed in an initial cost audit?

The auditor may consult the previous auditor, review prior working papers if the law allows, consider issues discussed at selection, and perform procedures on opening balances such as inventory (SCA 101 para 6.9).