How profitable is a business, and what do profitability ratios reveal about its performance?
Calculate and interpret profitability ratios (gross profit margin, net profit margin, return on owner's equity, return on assets) to evaluate business performance and inform decisions
A worked QCE Accounting Unit 4 answer on profitability ratios. Covers gross profit margin, net profit margin, return on owner's equity and return on assets, how each is calculated from the financial statements, how to interpret trends and compare against benchmarks, and how the ratios inform business decisions.
Reviewed by: AI editorial process; not yet individually human-reviewed
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What this dot point is asking
QCAA wants you to evaluate how profitable a business is using ratio analysis. You must calculate the key profitability ratios from a set of financial statements, interpret what each ratio means, compare results against prior years or benchmarks, and use the analysis to make and justify decisions about the business.
What profitability ratios do
Profitability ratios express profit relative to the resources used to generate it (sales, equity, assets). They turn raw dollar figures into comparable percentages so that performance can be tracked over time and compared between businesses of different sizes. Each ratio answers a specific question about where profit comes from.
Gross profit margin
Gross profit margin = (Gross profit / Net sales) x 100
This is the percentage of each sales dollar left after the cost of goods sold, before operating expenses. A margin of 45% means 45 cents of every sales dollar covers operating costs and profit. The ratio reflects pricing, purchasing efficiency and product mix. A falling gross profit margin signals rising supplier costs, discounting, or theft and inventory loss.
Net profit margin
Net profit margin = (Net profit / Net sales) x 100
This is the percentage of sales remaining after all expenses. It reflects both the trading margin and how well operating expenses are controlled. If the gross profit margin holds steady but the net profit margin falls, operating expenses (wages, advertising, finance costs) have grown faster than sales.
Return on owner's equity
Return on owner's equity (ROE) = (Net profit / Average owner's equity) x 100
where average owner's equity = (opening equity + closing equity) / 2.
ROE shows the return the owner earns on the money they have invested in the business. It is the headline measure for an owner, because it can be compared with the return available from alternative investments. A business returning 18% on equity is rewarding the owner well if comparable investments return less.
Return on assets
Return on assets (ROA) = (Net profit / Average total assets) x 100
ROA shows how efficiently the business uses its assets to generate profit, independent of how those assets are financed. A business with a high ROA squeezes more profit out of each dollar of assets. Comparing ROA with ROE reveals the effect of borrowing: when ROE exceeds ROA, borrowed funds are earning more than they cost, which lifts the owner's return (favourable gearing).
Interpreting and using the ratios
A ratio in isolation says little. Meaningful analysis compares:
- Over time (trend): is the ratio improving or deteriorating across years?
- Against competitors or industry benchmarks: how does the business compare with similar firms?
- Against the owner's expectations or alternative investments.
Analysis then links the movement to a cause and a decision. A falling net profit margin might lead to a decision to review pricing or cut discretionary expenses. A strong ROE might justify reinvesting profit to grow. The ratios are tools for decisions, so an exam answer should always interpret, not just calculate.
Exam-style practice questions
Practice questions written in the style of QCAA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
2024 QCAA4 marksUsing Stimulus 2 and 3 and your responses to Questions 12a) and 12b), calculate the following ratios for 30 June 2024: gross profit ratio, net profit ratio, return on owner's equity, and current ratio. Calculations should be rounded to two decimal places. [Health Foods: net sales 43 000, net profit 19 800, current liabilities 45 310.]Show worked answer →
One mark per ratio. State the formula, substitute, and round to two decimal places.
Gross profit ratio = gross profit / net sales x 100 = 43 000 / 60 000 x 100 = 71.67%.
Net profit ratio = net profit / net sales x 100 = 7 418 / 60 000 x 100 = 12.36%.
Return on owner's equity = net profit / owner's equity x 100 = 7 418 / 45 310 x 100 = 16.37%. (Use closing owner's equity of 39 892 plus net profit 2 000.)
Current ratio = current assets / current liabilities = 19 800 / 5 290 = 3.74:1.
Note that the gross profit and net profit ratios are well below the industry benchmarks (75% and 30%), showing cost of goods sold and expenses are high relative to sales, while the current ratio of 3.74:1 is comfortably above the 2:1 benchmark.
2022 QCAA10 marksRead Case study 2 (Stimulus 9 to 10) in the stimulus book. Analyse and evaluate the performance of The Motel Company to propose two recommendations to improve the profitability of the company.Show worked answer →
Calculate the profitability ratios, interpret the trend against the prior year and the industry benchmark, then give two justified recommendations.
Gross profit ratio = gross profit / sales x 100. 2022 = 36.59 / 91.31 x 100 = 40.07% (down from 50.86 / 89.56 = 56.79% in 2021). This is below the 2022 industry benchmark of 47.28%, indicating cost of sales has risen sharply relative to sales.
Net profit ratio = profit for the year / sales x 100. 2022 = 25.11 / 91.31 x 100 = 27.50% (down from 87.24% in 2021, though 2021 was inflated by a large fair value gain on investment properties of $63.49m, not trading performance). The 2022 net profit ratio of 27.50% is still above the benchmark of 21.65%.
Evaluation: trading profitability has weakened, driven mainly by the falling gross profit ratio. Two recommendations to improve profitability, each justified:
- Review cost of sales (renegotiate supplier costs or adjust room pricing) to lift the gross profit ratio back toward the 47.28% benchmark, because the gap between the gross and net profit margins shows the problem starts at the gross level.
- Reduce or control the largest operating expenses (for example employee and other expenses) so more gross profit converts to net profit, and avoid relying on one-off fair value gains to prop up reported profit.
Markers reward correct ratio calculations, comparison to the prior year and benchmark, and two recommendations that follow logically from the analysis.