Calculating Gross Profit Margin and Net Profit Margin
The gross profit margin and net profit margin are profitability ratios that express profit as a percentage of revenue, which makes it possible to compare profitability between different-sized businesses or between different years. Gross profit margin is calculated as gross profit divided by revenue, multiplied by 100.
Before you start
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Method
- Find the correct figures from the income statement: revenue, gross profit (for gross profit margin) or net profit (for net profit margin).
- State the formula before calculating: gross profit margin = (gross profit / revenue) x 100; net profit margin = (net profit / revenue) x 100.
- Divide the profit figure by revenue.
- Multiply the result by 100 to convert it to a percentage.
- Round the answer to one or two decimal places if it does not come out as a whole number, and always include the percent sign.
- Double-check the answer is sensible: net profit margin should always be lower than, or equal to, gross profit margin for the same business, since net profit is gross profit minus further expenses.
Worked example
A business has revenue of 60,000 pounds, gross profit of 24,000 pounds and net profit of 9,000 pounds. Calculate the gross profit margin and the net profit margin, giving both answers as percentages.
- State the gross profit margin formula: gross profit margin = (gross profit / revenue) x 100.
- Substitute the figures: (24,000 / 60,000) x 100.
- Calculate: 24,000 / 60,000 = 0.4, and 0.4 x 100 = 40%.
- State the net profit margin formula: net profit margin = (net profit / revenue) x 100.
- Substitute and calculate: (9,000 / 60,000) x 100 = 0.15 x 100 = 15%.
- State the answer: gross profit margin is 40% and net profit margin is 15%.
Practice questions
Try each question, then tap to reveal the answer.
Q1State the formula for gross profit margin.Show answer
Answer: Gross profit margin = (gross profit / revenue) x 100.
Q2State the formula for net profit margin.Show answer
Answer: Net profit margin = (net profit / revenue) x 100.
Q3A business has revenue of 40,000 pounds and gross profit of 16,000 pounds. Calculate its gross profit margin.Show answer
Answer: (16,000 / 40,000) x 100 = 40%.
Q4A business has revenue of 90,000 pounds and net profit of 18,000 pounds. Calculate its net profit margin.Show answer
Answer: (18,000 / 90,000) x 100 = 20%.
Q5A business calculates a net profit margin of 45% and a gross profit margin of 30% for the same year. Explain why this result must be wrong.Show answer
Answer: Net profit margin can never be higher than gross profit margin for the same business, because net profit is gross profit minus further expenses, so net profit, and its margin, must be lower than or equal to gross profit, and its margin; one of the figures must have been calculated incorrectly.
Q6A business has revenue of 25,000 pounds, cost of sales of 15,000 pounds and expenses of 6,000 pounds. Calculate its gross profit margin and net profit margin.Show answer
Answer: Gross profit = 25,000 - 15,000 = 10,000 pounds, so gross profit margin = (10,000 / 25,000) x 100 = 40%. Net profit = 10,000 - 6,000 = 4,000 pounds, so net profit margin = (4,000 / 25,000) x 100 = 16%.
Q7Why is it useful to express profit as a percentage of revenue rather than just stating the pound amount of profit?Show answer
Answer: Because a percentage allows fair comparison between businesses of different sizes, or between different years for the same business, whereas a raw pound figure alone does not show how that profit relates to the level of sales.
Exam-style questions
Written in the style of a GCSE Business exam paper, with a full mark scheme.
A business reports revenue of 150,000 pounds, cost of sales of 90,000 pounds, and expenses of 36,000 pounds for the year. (a) Calculate the business's gross profit. (2 marks) (b) Calculate the gross profit margin, as a percentage. (2 marks) (c) Calculate the business's net profit. (2 marks) (d) Calculate the net profit margin, as a percentage. (2 marks)
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A business's gross profit margin is 55% but its net profit margin is only 4%. Assess what this pattern of ratios suggests about the business, and what action it might consider taking.
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