Business revenues and costs for GCSE

Revenue is the money a business takes in from selling its products, and costs are the money it spends to make and sell them. Profit is what is left over, calculated as revenue minus total costs. These three concepts sit at the heart of Edexcel GCSE Business Theme 1, and the calculations come up in almost every Paper 1.

This guide covers each formula you need, the difference between fixed and variable costs, how to read a break-even chart, and the typical wording examiners use. Master the calculations and you can pick up the 6 to 9 marks that come up reliably in Section B.

Revenue (sometimes called sales or turnover) is the total money a business receives from selling its products or services in a given period. It is calculated as the selling price multiplied by the quantity sold. It is always quoted before any costs are taken off.

The Edexcel specification calls it revenue, but in the real world the same number is also called turnover, sales income, or top line. All four terms mean the same thing. Examiners will use revenue and sales interchangeably.

Costs are the money a business spends to make and sell its products. The GCSE specification splits costs into two types: Fixed costs and variable costs. The sum of the two is called total costs.

Fixed costs do not change with the level of output. Examples include rent, salaries, insurance, and loan repayments. Whether the business sells one unit or one thousand, fixed costs stay the same in the short run.

Variable costs change directly with output. Examples include raw materials, packaging, and piece-rate wages. If you make twice as many products, your variable costs roughly double.

Total costs are fixed costs plus variable costs. For one period, that is TC = FC + VC. If you need variable cost per unit, use VC = variable cost per unit x quantity produced.

Edexcel Paper 1 calculations rely on four core formulas. They are not given to you in the exam, so you have to know them by heart. Each one is simple algebra, but examiners deduct marks for missing units or messy working.

Amara runs a small cake business from her kitchen. Each cake sells for £4. Her fixed costs are £600 per month (rent, equipment lease, insurance). Variable costs are £1 per cake (ingredients and packaging). Last month she sold 500 cakes. Calculate her revenue, total costs, and profit.

Step 1: Revenue = 500 x 4 = £2,000.

Step 2: Variable costs = 500 x 1 = £500. Total costs = 600 + 500 = £1,100.

Step 3: Profit = 2,000 – 1,100 = £900.

Amara made a profit of £900 last month. If the examiner then asks for break-even, you use 600 / (4 – 1) = 200 cakes. She broke even at 200 and the other 300 cakes contributed £3 each, which is the £900 profit.

Break-even is the level of output at which revenue equals total costs, so profit is zero. Below that point the business loses money. Above it, the business makes a profit. The formula is fixed costs divided by the contribution per unit, where contribution is selling price minus variable cost per unit.

At GCSE you might also see a break-even chart with three lines: Fixed costs (horizontal), total costs (rising from the fixed-cost level), and revenue (rising from zero). The break-even point is where total costs and revenue lines cross. The vertical gap between revenue and total costs after that point is the profit, called the margin of safety when measured in units.

Margin of safety is the gap between actual sales and the break-even point. It is calculated as current output minus break-even output, measured in units. A higher margin of safety means more cushion before the business slips into a loss.

For Amara above, the break-even was 200 cakes and she sold 500. Her margin of safety is 500 – 200 = 300 cakes. If sales fall by up to 300 cakes a month, she still avoids a loss. If they fall by more, she would start losing money.

Edexcel Theme 2 introduces a more detailed view of profit using gross profit and net profit, which often appear in the same paper. Gross profit is revenue minus the cost of sales (mainly raw materials and direct production costs). Net profit takes off everything else (rent, salaries, marketing, interest).

The two formulas are: Gross profit = revenue – cost of sales, and net profit = gross profit – other operating costs. Examiners will sometimes also ask for the profit margins as percentages, which is each profit divided by revenue, multiplied by 100.

Edexcel examiner reports flag the same problems every year. Most of them are arithmetic slips or missing units. Calculations are usually marked on method, so showing your steps protects you when your maths goes wrong.

Bilal runs a phone-case business. Each case sells for £8. Variable cost per case is £3. Monthly fixed costs are £1,500. He currently sells 600 cases per month. Calculate his break-even, his profit, and his margin of safety.

Step 1: Break-even = 1,500 / (8 – 3) = 1,500 / 5 = 300 cases.

Step 2: Revenue = 600 x 8 = £4,800. Total variable cost = 600 x 3 = £1,800. Total costs = 1,500 + 1,800 = £3,300. Profit = 4,800 – 3,300 = £1,500.

Step 3: Margin of safety = 600 – 300 = 300 cases.

Bilal makes £1,500 profit per month and has a 300-case cushion. That is a comfortable position. If he wanted to grow profit, he could either raise the price (which might cut quantity) or cut variable costs by buying materials in bulk.