SEAB Original-style practice: A company's gross profit margin is steady at 35\% but its profit margin has fallen from 15\% to 9\%. Suggest two reasons and explain why the gross margin being unchanged is significant.

If the gross profit margin is unchanged but the profit (net) margin has fallen, the problem is not in trading (pricing or cost of goods) but in the **operating expenses or other costs** below gross profit. Two possible reasons: 1. **Rising operating expenses**, such as higher administrative or distribution costs, marketing, or staff costs, eating into the margin. 2. **Higher finance costs**, for example interest on new borrowings, reducing profit before the net margin is struck. The unchanged gross margin is significant because it rules out a trading problem: selling prices and the cost of goods are in the same proportion as before. This directs attention to overheads and financing as the cause of the falling profit margin, which is exactly how the layered margins help diagnose performance. Markers reward identifying that the issue lies below gross profit, two valid reasons (overheads, finance costs), and the diagnostic significance of the stable gross margin.

SingaporeAccountingSyllabus dot point

How do profitability ratios measure how well a business turns sales and capital into profit?

Calculate and interpret the gross profit margin, profit margin and return on capital employed

A focused answer to the H2 Principles of Accounting outcome on profitability ratios. Gross profit margin, profit (net) margin, return on capital employed, what each reveals, and how to interpret movements over time.

Generated by Claude Opus 4.810 min answerUpdated 2026-06-06

Reviewed by: AI editorial process; not yet individually human-reviewed

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What this dot point is asking
The answer
Examples in context
Try this

What this dot point is asking

SEAB wants you to calculate and interpret the main profitability ratios: gross profit margin, profit (net) margin and return on capital employed. Profitability is the headline measure of performance, and the exam rewards interpretation far more than computation. The central insight is that profitability has layers, the margin on trading, the margin after all operating costs, and the return on the capital invested, and comparing them reveals where a business creates or loses value.

The answer

The three core ratios

Ratio	Formula	Measures
Gross profit margin	$\dfrac{\text{gross profit}}{\text{revenue}} \times 100$	Trading margin per sales dollar
Profit (net) margin	$\dfrac{\text{profit}}{\text{revenue}} \times 100$	Profit per sales dollar after all costs
Return on capital employed	$\dfrac{\text{operating profit}}{\text{capital employed}} \times 100$	Return per dollar of long-term capital

Capital employed is usually total equity plus non-current liabilities (the long-term funds invested), or equivalently total assets less current liabilities.

What each ratio reveals

Gross profit margin isolates trading: it falls if selling prices drop or the cost of goods rises. Profit margin captures everything down to profit for the year, so it reflects overheads, finance costs and tax as well as trading. Return on capital employed (ROCE) links profit to the capital used to generate it, the single best measure of overall efficiency, because a high margin on tiny capital and a low margin on huge capital are very different businesses.

Interpreting movements

Ratios mean little in isolation; they are compared over time, against budget, or against similar firms. The diagnostic power comes from reading them together: a stable gross margin with a falling profit margin points to overheads or financing, not trading; a falling ROCE despite steady margins may signal that capital has grown faster than profit. Always explain a movement, do not just report it.

Worked example

A company reports: revenue $\$ 800,000 $; gross profit$ \ $280\,000$ ; operating profit $\$ 120,000 $; profit for the year$ \ $84\,000$ ; equity $\$ 500,000 $; non-current liabilities$ \ $300\,000$ . Calculate the profitability ratios and comment.

Step 1: Gross profit margin

\frac{280\,000}{800\,000} \times 100 = 35\%

Step 2: Profit margin

\frac{84\,000}{800\,000} \times 100 = 10.5\%

Step 3: Return on capital employed

Capital employed $= 500\,000 + 300\,000 = \$ 800,000$.

\text{ROCE} = \frac{120\,000}{800\,000} \times 100 = 15\%

Step 4: Comment

The company keeps $35\%$ of each sales dollar after the cost of goods, falling to $10.5\%$ after all costs and tax, a sizeable gap explained by operating expenses, finance costs and tax. The $15\%$ ROCE shows reasonable use of capital. To judge whether these are good, compare with prior years and competitors; the numbers alone are only the start of the analysis.

Examples in context

Example 1. A price war. A retailer cuts prices to win market share. Revenue rises but the gross profit margin falls from $42\%$ to $36\%$ because each sale now yields less. The fall at the gross-margin level confirms the cause is trading (pricing), not overheads. Whether the strategy works depends on whether higher volume and a steady ROCE compensate for the thinner margin, which the layered ratios let management track.

Example 2. Capital growing faster than profit. A manufacturer invests heavily in new plant, doubling capital employed, but operating profit rises only modestly. ROCE falls even though margins are unchanged, signalling that the new capital is not yet generating proportionate returns. The ratio flags a concern that the income statement alone would miss, illustrating why ROCE complements the margins.

Try this

Q1. Revenue is $\$ 400,000 $and gross profit is$ \ $150\,000$ . Find the gross profit margin. [2 marks]

Cue. $\dfrac{150\,000}{400\,000} \times 100 = 37.5\%$ .

Q2. Operating profit is $\$ 60,000 $; equity is$ \ $250\,000$ ; non-current liabilities are $\$ 150,000$. Find ROCE. [3 marks]

Cue. Capital employed $= 250\,000 + 150\,000 = \$ 400,000 $; ROCE$ = \dfrac{60,000}{400,000} \times 100 = 15%$.

Q3. Explain why a falling profit margin with an unchanged gross margin points away from a trading problem. [2 marks]

Cue. The trading margin (price minus cost of goods) is unchanged, so the decline must come from costs below gross profit, namely operating expenses, finance costs or tax.

Exam-style practice questions

Practice questions written in the style of SEAB exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.

Original7 marksA company reports revenue

\

500\,000

, gross profit

200\,000

, operating profit

\

90\,000

, and capital employed of

600\,000

. (a) Calculate the gross profit margin, the operating profit margin and the return on capital employed. (b) Interpret what each tells a user.

Show worked answer →

(a) Gross profit margin $= \dfrac{\text{gross profit}}{\text{revenue}} \times 100 = \dfrac{200\,000}{500\,000} \times 100 = 40\%$ .

Operating profit margin $= \dfrac{\text{operating profit}}{\text{revenue}} \times 100 = \dfrac{90\,000}{500\,000} \times 100 = 18\%$ .

Return on capital employed (ROCE) $= \dfrac{\text{operating profit}}{\text{capital employed}} \times 100 = \dfrac{90\,000}{600\,000} \times 100 = 15\%$ .

(b) The $40\%$ gross margin shows the company keeps $\$ 0.40 $of every sales dollar after the cost of goods. The$ 18% $operating margin shows that after running costs,$ \ $0.18$ of each sales dollar remains as operating profit. The $15\%$ ROCE shows that every dollar of long-term capital generates $\$ 0.15$ of operating profit, a measure of how efficiently capital is used.

Markers reward the three correct ratios with formulae, and an interpretation of each in plain terms (margin per sales dollar, return per capital dollar).

Original5 marksA company's gross profit margin is steady at

35\%

but its profit margin has fallen from

15\%

9\%

. Suggest two reasons and explain why the gross margin being unchanged is significant.

Show worked answer →

If the gross profit margin is unchanged but the profit (net) margin has fallen, the problem is not in trading (pricing or cost of goods) but in the operating expenses or other costs below gross profit. Two possible reasons:

Rising operating expenses, such as higher administrative or distribution costs, marketing, or staff costs, eating into the margin.
Higher finance costs, for example interest on new borrowings, reducing profit before the net margin is struck.

The unchanged gross margin is significant because it rules out a trading problem: selling prices and the cost of goods are in the same proportion as before. This directs attention to overheads and financing as the cause of the falling profit margin, which is exactly how the layered margins help diagnose performance.

Markers reward identifying that the issue lies below gross profit, two valid reasons (overheads, finance costs), and the diagnostic significance of the stable gross margin.