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Total costs = fixed costs + total variable costs, revenue = price × units sold, and profit = revenue − total costs. Free notes and 13 questions answered.
Basic Financial Terms and Calculations is part of Business planning in GCSE AQA Business.
6 min
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18
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GCSE AQA
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Total costs = fixed costs + total variable costs, revenue = price × units sold, and profit = revenue − total costs. Free notes and 13 questions answered.
Use this lesson to stay inside Business planning while connecting the detail back to the wider Business in the real world topic.
Read the core explanations from Basic Financial Terms and Calculations before testing yourself from memory.
Every business decision — from hiring a new member of staff to launching a product — comes down to money. Without understanding the basic financial language, you cannot analyse whether a business is succeeding or heading for trouble.
AQA examiners expect you to use precise financial terminology. Writing 'money coming in' instead of 'revenue' will cost you marks. This lesson gives you the vocabulary and the calculation skills to answer financial questions with confidence.
Think of a small bakery run by Priya. She bakes and sells bread every day. Some of her costs stay the same no matter how many loaves she bakes — her rent, for example. Others rise as she bakes more — like flour and packaging. Understanding this difference is the foundation of all business finance at GCSE.
Revenue is the starting point. It is the total money a business receives from its sales before any costs are deducted. You calculate it by multiplying the selling price per unit by the number of units sold.
Revenue tells you how much money is flowing into the business. But on its own, it tells you nothing about whether the business is doing well. A business could have high revenue and still be losing money if its costs are even higher.
This is where profit and loss come in. When revenue is greater than total costs, the business makes a profit. When total costs exceed revenue, the business makes a loss. The calculation is the same in both cases: Revenue minus Total Costs.
Back to Priya's bakery. If she sells 200 loaves at £2.50 each, her revenue is £500. If her total costs for the day are £380, she makes a profit of £120. If her costs had been £520, she would have made a loss of £20. The formula is identical — only the outcome changes.
Here is where students often slip up. Revenue is not profit. Many students write 'the business made £500 profit' when £500 is actually the revenue. Profit can only be calculated once you know the total costs.
Not all costs behave the same way. Understanding the difference between fixed and variable costs is one of the most tested areas in AQA Business Studies, and it is also one of the most misunderstood.
Think of fixed costs as the costs you cannot escape. Priya pays £800 per month in rent for her bakery whether she bakes 10 loaves or 10,000. That cost is fixed. Her flour, however, costs more the more she bakes — that is a variable cost.
Total costs combine both types. The formula is straightforward: Total Costs = Fixed Costs + Variable Costs. Variable costs are usually expressed as a cost per unit, so you multiply the variable cost per unit by the number of units produced to find the total variable cost.
Here is a common trap. Students sometimes classify wages as always fixed or always variable. In reality, it depends on the type of wage. A manager on a monthly salary is a fixed cost. A factory worker paid per item produced is a variable cost. Always read the scenario carefully before classifying.
The chart above makes the distinction visible. Fixed costs stay flat at £800 across all output levels. Variable costs rise steadily as more loaves are produced. Total costs rise too, but never drop below the fixed cost line — that floor is always there, even at zero output.
This has a real business implication. If Priya's sales fall sharply, she still owes £800 in rent. Her variable costs will fall because she is buying less flour, but the fixed costs remain. This is why high fixed costs can make a business vulnerable during slow periods — a key point worth making in an evaluate question.
Theory is only useful when you can apply it. AQA calculate questions award marks for showing your formula, your substitution, and your final answer with units. Missing any of these steps costs marks even if your final number is correct.
Let's walk through a full calculation from scratch, the way an examiner expects to see it. This example uses a small manufacturing business run by Mohammed.
Worked example: Calculating Total Costs, Revenue and Profit
Mohammed runs a phone case business. His fixed costs are £1,200 per month. Each phone case costs £4.50 to produce (variable cost per unit). He produces and sells 500 cases per month at a selling price of £12.00 each. Calculate his monthly profit or loss.
Answer: Mohammed's monthly profit is £2,550.
Now consider what happens if Mohammed's sales fall. If he only sells 300 cases instead of 500, his revenue drops but his fixed costs remain at £1,200. His variable costs fall because he produces fewer cases, but the fixed cost floor does not move. This is exactly the kind of analysis an examiner wants to see in a higher-mark question.
Worked example: Analysing the Impact of Falling Sales on Profit
Mohammed's sales fall to 300 cases in the following month. His fixed costs remain £1,200 and his variable cost per unit stays at £4.50. The selling price remains £12.00. Calculate his new profit or loss and explain what this means for the business. [6 marks]
Method: Calculate then Interpret
Answer: Mohammed's profit falls to £1,050. Although the business remains profitable, the £1,500 reduction in profit highlights the risk of fixed costs. Because rent and other fixed costs cannot be reduced in the short term, any fall in sales has a significant impact on profit margins. Mohammed may need to consider ways to increase sales volume or reduce variable costs to protect profitability.
Financial calculation questions follow a predictable pattern on AQA papers. Knowing the formula is only part of the challenge — how you present your working determines how many marks you collect.
The most reliable approach is Formula → Substitution → Answer. Write the formula name and equation first. Then substitute the numbers from the question. Then state the final answer with the correct unit (£). This three-step structure earns marks at every stage, so even an arithmetic slip does not wipe out all your marks.
For higher-mark questions that ask you to 'explain' or 'analyse', the calculation is only the starting point. You must then connect the result to a business consequence. For example: 'The profit of £1,050 is significantly lower than the previous month, which may concern Mohammed's stakeholders and limit his ability to reinvest in the business.' That chain of reasoning is what separates a Level 2 response from a Level 3.
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.
Total costs = fixed costs + total variable costs, where total variable costs = variable cost per unit × quantity. With fixed costs of £1,200 and 500 phone cases costing £4.50 each to produce, total variable costs are £2,250 and total costs are £3,450.
Examples of variable costs are raw materials, packaging and piece-rate wages, which change in direct proportion to output: if output doubles, variable costs double. Flour for a bakery is a variable cost, because it costs more the more is baked.
Revenue = selling price per unit × number of units sold. It is the total income from sales before any costs are deducted, so 500 phone cases sold at £12.00 each give revenue of £6,000. Revenue is not the same as profit.
Examples of fixed costs are rent, insurance and the salaries of permanent staff, which remain constant regardless of the level of output. Priya pays £800 a month rent for her bakery whether she bakes 10 loaves or 10,000, and a business pays fixed costs even if it produces nothing.
Profit = revenue − total costs. If a bakery sells 200 loaves at £2.50, revenue is £500; with total costs of £380 it makes a profit of £120, but if costs were £520 it would make a loss of £20.
Total variable costs = variable cost per unit × number of units produced. If each phone case costs £4.50 to make and 500 are produced, total variable costs are £4.50 × 500 = £2,250; adding fixed costs of £1,200 gives total costs of £3,450.
Revenue is not the same as profit: revenue is the total money a business receives from sales before any costs are deducted, while profit is what remains after total costs are taken away: profit = revenue − total costs. If Priya sells 200 loaves at £2.50, her revenue is £500, but with costs of £380 her profit is £120.
Wages can be either a fixed or a variable cost. A manager on a monthly salary is a fixed cost, while a factory worker paid per item produced is a variable cost, so always read the scenario carefully before classifying wages.
A loss is when a business's total costs exceed its revenue, so revenue − total costs gives a negative result. If Priya's bakery has revenue of £500 but total costs of £520, she makes a loss of £20; the formula is the same as for profit, only the outcome changes.
High fixed costs are risky because they must be paid even when sales fall. If sales drop, variable costs fall but fixed costs such as rent stay the same, so profit falls sharply; Mohammed's profit fell from £2,550 to £1,050 when sales fell from 500 to 300 cases.
Falling sales cause a disproportionate drop in profit because fixed costs do not fall with output. When Mohammed's sales fell 40%, from 500 to 300 cases at £12 each, revenue fell £2,400 to £3,600, total costs fell only to £2,550, and profit fell by £1,500, from £2,550 to £1,050.
Fixed costs do not change with output: they stay constant whether a business produces nothing or a great deal. On a graph, fixed costs are a flat line, and total costs rise with output but never fall under the fixed cost line, even at zero output.
Common mistakes in business finance calculations include writing revenue as profit, forgetting to recalculate variable costs when output changes, and not stating whether the result is a profit or a loss. Writing the formula, then the substitution, then the answer with £ earns marks at each stage.