✓ Revise Right course
Gross profit is revenue minus cost of sales, and net profit is gross profit minus operating expenses. Notes, worked examples and 14 questions answered.
Key Financial Terms and Calculations is part of Financial terms and calculations in GCSE AQA Business.
8 min
Reading time
16
Lessons in this topic
GCSE AQA
Pathway
Reviewed by Revise Right
Content review
Gross profit is revenue minus cost of sales, and net profit is gross profit minus operating expenses. Notes, worked examples and 14 questions answered.
Use this lesson to stay inside Financial terms and calculations while connecting the detail back to the wider Finance topic.
Read the core explanations from Key Financial Terms and Calculations before testing yourself from memory.
Every business decision — from hiring a new member of staff to buying a new machine — comes down to money. A business that cannot read its own financial figures is flying blind.
Here is the uncomfortable truth: most businesses that fail do not fail because they have a bad product. They fail because they run out of cash or misread their costs. Understanding the numbers is not optional — it is survival.
In this lesson, you will build the financial vocabulary and calculation skills that AQA examiners test directly. Every term here has appeared in past papers. Every formula here carries method marks.
Think of a business like a bucket. Money flows in from sales — that is revenue. Money flows out to pay for everything the business needs — those are costs. What remains in the bucket is profit. If more flows out than flows in, the bucket empties — that is a loss.
Now that revenue is pinned down, costs are the next piece of the puzzle. Costs split into two important categories, and the distinction matters enormously for exam questions.
Total costs combine both categories: Total Costs = Fixed Costs + Variable Costs. This is the figure you subtract from revenue to find profit or loss.
Here is where it gets interesting. Gross profit and net profit are two different things, and confusing them is one of the most common errors in GCSE Business exams.
| Term | Formula | What It Excludes |
|---|---|---|
| Gross Profit | Revenue - Cost of Sales | Operating expenses (rent, wages, marketing) |
| Net Profit | Gross Profit - Operating Expenses | Nothing — this is the 'bottom line' (at GCSE level, net profit = gross profit minus operating expenses and is treated as the bottom line figure.) |
| Loss | Costs exceed Revenue | N/A — the business is spending more than it earns |
Cost of sales (also called direct costs) refers specifically to the costs directly tied to producing the goods sold — raw materials, direct labour, and manufacturing costs. Operating expenses are the broader running costs of the business.
A business can have a healthy gross profit but still make a net loss if its operating expenses are too high. This is why investors and managers look at both figures, not just one.
Before moving to calculations, check your understanding of these core terms. This next question targets the most common mix-up examiners set traps around.
Theory is straightforward to read but hard to apply under exam pressure. The safest approach is always to follow the same sequence: identify revenue, identify costs, subtract in the right order. Let us walk through a full example.
Worked example: Calculating Gross Profit and Net Profit
Mohammed runs a sports equipment shop. In one month, he sells 300 tennis rackets at £40 each. The cost of buying the rackets from his supplier is £25 each. His monthly operating expenses (rent, utilities, wages) total £2,500. Calculate his gross profit and net profit for the month.
Answer: Gross Profit = £4,500. Net Profit = £2,000.
Notice how the two-stage approach — gross profit first, then net profit — mirrors exactly what AQA mark schemes reward. Writing each stage separately earns method marks even if you make an arithmetic slip at the end.
Now consider what these figures tell Mohammed as a business owner. A net profit of £2,000 on revenue of £12,000 means he keeps 16.7p for every £1 of sales after all costs. Whether that is acceptable depends on his industry, his goals, and what his competitors achieve — which is why financial figures always need interpretation, not just calculation.
Businesses regularly face decisions about whether to invest large sums of money — in new machinery, a bigger warehouse, a fleet of delivery vehicles, or a new production line. The question is always the same: is this investment worth it?
The Average Rate of Return (ARR) gives businesses a way to compare investment projects using a single percentage figure. A higher ARR means a better return relative to the money invested. Crucially, it also allows comparison with alternative uses of that money — such as leaving it in a savings account earning interest.
Here is how the ARR is built up. First, you need to know the total profit generated by the investment over its lifetime. Then you find the average annual profit. Finally, you express that as a percentage of the original investment.
One detail that trips students up: the 'profit' used in ARR is the net return from the investment, not the total cash inflows. You must subtract the initial investment cost from the total returns to find total profit, then divide by the number of years.
Let us walk through a full ARR calculation so the method is completely clear before you try one yourself.
Worked example: Calculating Average Rate of Return for a New Machine
Priya's manufacturing business is considering buying a new machine for £50,000. The machine is expected to generate total returns of £80,000 over 5 years. Calculate the Average Rate of Return (ARR) and advise whether the investment is worthwhile if the bank offers a savings rate of 8% per year.
Answer: ARR = 12%. Since this exceeds the 8% bank savings rate, the investment appears financially worthwhile. However, Priya should also consider the risks involved and whether cash flow can support the upfront £50,000 cost.
Notice that the final step goes beyond the calculation. AQA exam questions that ask you to 'evaluate' or 'recommend' expect you to interpret the ARR figure in context — not just state it. A 12% ARR sounds strong, but if the investment carries high risk or ties up cash the business needs for day-to-day operations, it may not be the right choice.
Looking at the chart above, Project C (the delivery fleet) offers the highest ARR at 15%, followed by Project A (new machinery) at 12%, and Project B (the new warehouse) at 7%. On ARR alone, a business should prioritise Project C.
However, this is where business judgement matters. If the warehouse is essential for storing increased stock to meet growing demand, its strategic value may outweigh its lower ARR. Financial data informs decisions — it does not make them automatically. Stakeholders such as shareholders may prioritise the highest return, while managers may weigh operational necessity more heavily.
Calculating a figure is only half the job. AQA questions that carry 4 or more marks expect you to say what the number means for the business. This is the difference between a Level 1 and a Level 3 response.
Earlier, we calculated Mohammed's net profit of £2,000 and Priya's ARR of 12%. Now consider how different stakeholders would react to those figures. Mohammed's shareholders might be satisfied with a £2,000 monthly profit, but his bank manager might question whether the business generates enough surplus to repay a loan. Priya's investors might welcome a 12% ARR, but her employees might be concerned that the new machine could reduce the need for manual labour.
This is the 'stakeholder lens' that top-band answers apply. Financial figures create trade-offs between groups with different interests, and recognising those trade-offs is what separates analysis from description.
Notice how the sample answer above does two things: it makes a clear financial judgement based on the data, and it acknowledges that ARR is not the only consideration. That two-part structure is exactly what AQA mark schemes reward in evaluation questions.
Financial calculation questions are among the most reliable mark-winners in GCSE Business — if you follow the right method. They are also among the most common sources of avoidable errors. The mistakes below appear in examiner reports year after year.
The single most important habit is to show every stage of your working. AQA mark schemes award method marks for correct intermediate steps, even if the final answer is wrong. A student who writes the correct formula and substitutes correctly but makes an arithmetic error at the end can still earn 2 out of 3 marks. A student who writes only a final answer with no working earns zero if that answer is wrong.
For ARR questions specifically, the most frequent error is using total returns instead of total profit as the starting point. Always subtract the initial investment from total returns before dividing by the number of years. The ARR formula measures return on the money invested, not the raw cash received.
Published by Revise Right. Use the official specification reference to check the requirements for your course. Content updated: 2026-03-05.
Move to the related lessons or back to the topic page when you need the wider sequence before exam-style practice.
Gross profit is revenue minus cost of sales. Mohammed sells 300 tennis rackets at £40, revenue of £12,000, and buys them at £25 each, cost of sales of £7,500, so gross profit is £4,500, before paying running costs such as rent, utilities and wages.
Net profit is gross profit minus operating expenses, the 'bottom line'. Mohammed's sports equipment shop has gross profit of £4,500 and operating expenses of £2,500, so net profit is £2,000; subtracting all costs from revenue in one go gives the same answer.
Gross profit = revenue − cost of sales, the direct costs of producing the goods sold. Net profit = gross profit − operating expenses such as rent, wages and marketing. A shop selling 300 rackets at £40 that cost £25 each has gross profit of £4,500 and, after £2,500 of expenses, net profit of £2,000.
Average rate of return (ARR) = (average annual profit ÷ initial investment) × 100, where total profit = total returns − initial investment. A £50,000 machine returning £80,000 over 5 years makes £30,000 of profit, or £6,000 a year, giving an ARR of 12%.
Cost of sales, also called direct costs, is the cost directly tied to producing the goods sold, such as raw materials, direct labour and manufacturing costs. It is subtracted from revenue to find gross profit, while the broader running costs, called operating expenses, are subtracted to find net profit.
Operating expenses are the broader running costs of a business, such as rent, utilities, wages and marketing. Cost of sales, by comparison, is the cost directly tied to producing the goods sold. Subtracting operating expenses from gross profit gives net profit.
ARR is compared with alternatives, such as a bank savings rate or other projects. An ARR of 12% beats an 8% savings rate, so the investment appears worthwhile, but ARR does not account for risk, cash flow timing or non-financial factors, such as a warehouse's strategic value.
The most common ARR mistake is using total returns instead of total profit. Always subtract the initial investment from the total returns first, then divide by the number of years, because ARR measures the return on the money invested, not the raw cash received.
Revenue is the total value of sales over a given period, calculated as price per unit × quantity sold. A bakery selling 500 loaves at £2.50 each has revenue of £1,250, and a software firm selling 200 licences at £49.99 each has revenue of £9,998.
Net profit per £1 of sales shows how much a business keeps after all costs. Mohammed's net profit of £2,000 on revenue of £12,000 means he keeps 16.7p of every £1; whether that is acceptable depends on his industry, his goals and what his competitors achieve.
Stakeholders react to financial figures differently: shareholders might be satisfied with a £2,000 monthly profit, while a bank manager might question whether it generates enough surplus to repay a loan, and employees might worry that a new machine with a 12% ARR could reduce the need for manual labour.
Average rate of return does not account for risk, cash flow timing or non-financial factors. A 12% ARR sounds strong, but if the investment carries high risk or ties up cash the business needs for day-to-day operations, it may not be the right choice.
A business should not always choose the project with the highest ARR. A delivery fleet at 15% beats new machinery at 12% and a warehouse at 7%, but if the warehouse is essential for storing stock to meet growing demand, its strategic value may outweigh its lower ARR.
Comparing ARR with a savings rate shows whether an investment beats leaving the money in a savings account. Priya's £50,000 machine returning £80,000 over 5 years has an ARR of 12%, more than an 8% bank savings rate, so it appears financially worthwhile.