Internal and Forensic Audit · Internal Audit of Specific Functions

Internal Audit of Sales and Marketing Function

Updated 11 October 2026 · Fact-checked

Internal audit of sales and marketing checks that the revenue cycle is authorised, accurate, complete and properly recorded. You review order processing, pricing, discounts, credit control, dispatch, billing, revenue recognition, receivables and marketing spend, test controls and transactions, and report gaps with recommendations.

Understand Internal Audit of Sales and Marketing

The sales cycle starts with a customer enquiry and ends with cash in the bank. Between these points sit many steps: order receipt, credit approval, pricing, dispatch, invoicing, accounting, collection and returns. Each step can fail. Orders may be accepted from risky customers. Prices may be changed without approval. Goods may leave without an invoice. Sales may be booked early to meet targets.

The internal auditor looks at this cycle from the management's side. The aim is not only to check that figures are right. You also ask whether the function follows policy, protects the company's revenue and cash, and meets its targets at acceptable risk. This is why the audit covers both financial and operational controls.

Start with the risks, then the controls, then the tests. Key risks are: sales to uncreditworthy customers, unauthorised discounts, unbilled dispatches, fictitious or premature revenue, delayed collection, bad debts, misuse of credit notes and marketing money paid without proper benefit. For each risk, identify the control that should exist and design a test to see if it works.

Marketing is audited too. Here you check that budgets are approved, spend is supported by contracts and proof of performance, promotional schemes are applied as announced, and commissions and incentives are computed as per policy. Sales incentive plans can push staff to push sales that should not be booked, so look at them closely.

Segregation of duties is the base of most controls. The person who takes orders should not approve credit, raise invoices, or handle cash and receivables ledgers. Where this is not possible, look for compensating controls such as management review and independent reconciliation.

Key rules to remember

Debtors turnover ratio: Net credit sales ÷ Average trade receivables; Higher means faster collection. Compare with prior periods and industry to spot slow recovery.
Average collection period: 365 ÷ Debtors turnover ratio (or Average receivables ÷ Net credit sales × 365); Compare with the credit terms given to customers. A longer period signals weak credit control.
Gross profit ratio: Gross profit ÷ Net sales × 100; A sudden fall may point to unauthorised discounts, pricing errors or cost misposting.
Net sales: Gross sales − Sales returns − Trade discounts allowed; Use to check that returns and discounts are properly deducted and approved.
Ageing of receivables: Group outstanding invoices by days past due (for example 0-30, 31-60, 61-90, over 90); Basis for assessing recoverability and provisioning for doubtful debts.
Revenue recognition core rule: Recognise revenue when control of goods or services passes to the customer, at the amount the entity expects to receive; Under Ind AS 115, the principle is a five-step model. Check cut-off at the period end.

How to solve Internal Audit of Sales and Marketing questions

Use this order for any question on auditing the sales and marketing function, whether it asks for an audit programme, controls, tests or a report.

1Identify the stage of the sales cycle the question is about: order, credit, pricing, dispatch, billing, revenue, receivables, collection or marketing.
2List the main risks at that stage in one line each, such as unauthorised discount or unbilled dispatch.
3State the expected control for each risk, such as approval limits, system credit block or matching of documents.
4Design audit procedures: inspect documents, re-perform calculations, confirm balances, analyse ratios and trace samples both ways.
5Link tests to assertions such as occurrence, completeness, cut-off, accuracy and valuation.
6Apply the facts given in the question: name the company, amounts and gaps, and conclude on what is wrong.
7Write findings with cause, effect and recommendation, and mention management response and follow-up where asked.

Quickest way: Risk-Control-Test grid in three columns

When to use it: Use when the question asks for an audit programme, key controls or areas of review and you have limited time.

Draw three columns in your mind: Risk, Control, Test.
Walk the cycle in order: order, credit, price, dispatch, invoice, record, collect, review.
Write one line per stage, such as 'Dispatch without invoice | Gate pass matched to invoice | Trace gate passes to invoices'.
Add marketing as a last block: budget, approval, proof of performance, incentives.
Close with analytics (ageing, ratios, trend) and one line on reporting to the audit committee or management.

Common mistakes in Internal Audit of Sales and Marketing

Treating the audit as only a check of sales ledger totals.
Students think of statutory audit, which focuses on financial statement figures.
Fix: Cover operations too: policy compliance, pricing authority, credit approval and efficiency of collection.
Testing only from invoice to dispatch records.
It feels natural to start from what is recorded.
Fix: Test in both directions. Invoice to dispatch proves occurrence. Dispatch to invoice proves completeness, catching unbilled goods.
Ignoring cut-off at period end.
Students focus on the year's flow and forget the boundary dates.
Fix: Check dispatches, invoices and returns around the year-end and see that revenue is booked in the period when control passed.
Not separating duties in the answer.
Questions on controls are answered with a list of documents only.
Fix: State who does what. Order entry, credit approval, billing and cash handling should sit with different people.
Writing generic recommendations like 'improve controls'.
Students run short of time and skip specifics.
Fix: Give a concrete action: a system block on credit limit breach, approval matrix for discounts, monthly ageing review by the finance head.
Leaving out marketing expenses and incentives.
The topic name is read as only the sales function.
Fix: Add a short block on budget approval, proof of performance, scheme compliance, commissions and credit notes issued for schemes.

Worked examples

Example 1

Rao Appliances Ltd sells through 40 dealers. The internal auditor finds that sales staff themselves approve credit limits and can edit prices in the billing system. Identify the control weaknesses and recommend actions.

Show the solution

Risk 1: the sales staff are rewarded on sales volume. Approving credit limits themselves creates a conflict of interest and a risk of bad debts.
Risk 2: price edits in the billing system without approval can lead to unauthorised discounts, revenue leakage and possible collusion with dealers.
Control gap: segregation of duties is absent between order taking, credit approval and pricing.
Recommendation 1: move credit limit approval to an independent credit control team or finance, based on dealer financials, history and security.
Recommendation 2: lock the price master. Only a designated person should change it, with approval and a system log.
Recommendation 3: review exception reports of price changes and limit overrides monthly, and report them to management.
Test to confirm: sample invoices, compare price with the approved price list and note deviations without approval.

Answer: The weaknesses are lack of segregation of duties, sales-staff control over credit limits and uncontrolled price editing. Fix them through independent credit approval, a locked and approved price master, and a monthly review of exceptions.

Example 2

At 31 March, Meera Textiles Ltd has net credit sales of ₹12,00,00,000 for the year. Opening receivables are ₹1,50,00,000 and closing receivables are ₹2,50,00,000. Credit terms are 45 days. Compute the average collection period and comment as an internal auditor.

Show the solution

Average receivables = (1,50,00,000 + 2,50,00,000) ÷ 2 = ₹2,00,00,000.
Debtors turnover = 12,00,00,000 ÷ 2,00,00,000 = 6 times.
Average collection period = 365 ÷ 6 = 60.83 days, about 61 days.
Compare with credit terms of 45 days. Collection is about 16 days slower than policy.
Receivables rose by ₹1,00,00,000, or about 67%, against a base of ₹1,50,00,000, which needs explanation.
Audit actions: obtain ageing, review the overdue accounts, check approval of credit extensions, test post year-end receipts and review the adequacy of the provision for doubtful debts.
Also check cut-off, since a rise in closing receivables could come from sales booked early near the year-end.

Answer: Average collection period is about 61 days against the 45-day terms. This signals weak credit control or possible premature revenue, so the auditor should examine ageing, subsequent receipts, cut-off and provisions, and report the matter to management.

Exam tips

Answer in a structure: risks, controls, audit procedures, then recommendations. Examiners reward this order.
Use the facts in the case. Name the company, the amounts and the gap, and do not give only theory.
For ratio questions, show the formula, the working and a one-line audit conclusion.
Mention both directions of testing and cut-off wherever revenue is discussed.
Include marketing expenses and incentive schemes in programme-type answers to show full coverage.

Practice questions from Internal Audit of Specific Functions

Internal Audit of Sales and Marketing in other exams

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

Internal Audit of Sales and Marketing: frequently asked questions

What is the main objective of internal audit of sales and marketing?

The aim is to check that the revenue cycle is controlled, policies are followed and revenue and receivables are correctly recorded. It also looks at efficiency, such as speed of collection and value from marketing spend.

How is internal audit of sales different from statutory audit of revenue?

Statutory audit focuses on whether revenue and receivables in the financial statements are fairly stated. Internal audit goes wider: controls, policy compliance, efficiency and risk, and it reports to management and the audit committee through the year.

What are the key controls over credit and receivables?

Credit limits approved by someone independent of sales, a system block when limits are exceeded, regular ageing review, follow-up on overdue accounts and approved write-offs. Customer balance confirmations add further comfort.

How do I audit marketing expenses?

Check that the budget is approved, spend matches contracts and invoices, and the service was actually delivered. Also test that schemes, commissions and incentives are computed as per approved policy.