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Market Share, Size and Growth

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Teaching Business

Market Share, Size and Growth

A clear guide to market share, market size and market growth, including how businesses calculate them and use them to judge performance and opportunities.

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Created by an experienced Head of Business and examiner

AQA | Edexcel | Cambridge | Eduqas | WJEC | OCR | GCSE

KEY POINTS

Market size is the total sales in a market over a period of time.
Market share is the percentage of total market sales earned by one business.
Market growth measures how much the total market has increased or decreased over time.
Businesses use market share to judge their position against competitors.
A growing market may create more opportunities for businesses to increase sales.
A business can grow even if its market share stays the same, provided the overall market is getting bigger.
A rising market share usually suggests a business is performing better than competitors.
Market size, share and growth help managers make decisions about pricing, promotion, expansion and investment.

KEY DEFINITION

Market Share

Market share is the percentage of total market sales that is earned by one business.

Main Explanation

Businesses need to understand the market they operate in so they can judge performance and plan future decisions. Three important measures are market size, market share and market growth. These help a business understand how large the market is, how well it is performing compared with competitors, and whether the market is expanding or shrinking.

Market size is the total value or volume of sales in a market over a period of time. For example, the market size for bottled water could be measured as the total number of bottles sold or the total revenue earned by all firms in that market over a year. Market size matters because it helps a business judge how much demand exists in total.

Market share shows the proportion of total market sales that belongs to one business. It is usually calculated using the formula: business sales ÷ total market sales × 100. If a business has a high market share, it may have strong brand recognition, customer loyalty or competitive advantages. However, a low market share does not always mean failure, especially if the market is large or growing quickly.

Market growth measures the percentage increase or decrease in total market size over time. It is calculated by dividing the change in market size by the original market size and multiplying by 100. This helps businesses judge whether demand in the whole market is rising or falling. A growing market may be attractive because there is more chance to increase sales, while a shrinking market may be more difficult and competitive.

These three ideas need to be interpreted together. A business may have a small market share but still perform well if the overall market is growing quickly. Equally, a business may keep the same sales level but lose market share if competitors are growing faster. This is why managers should not look at one figure in isolation.

Market share, size and growth are useful for decision-making. If a business sees strong market growth, it may invest more in promotion, product development or distribution. If market share is falling, managers may review prices, quality, branding or customer service. If market size is small, the business may decide that the market is too limited to justify expansion.

However, these measures also have limitations. Market data may be out of date or based on estimates, especially in fast-changing markets. In addition, a business with high market share is not always the most profitable if costs are too high. Strong exam answers therefore explain what the figures suggest, but also consider context and possible limitations.

Overall, market share, size and growth are useful because they help businesses measure performance, compare themselves with competitors and identify future opportunities. They are especially valuable when used together rather than as separate statistics.

✎ EXAMINER TIP

Students often calculate market share or growth correctly but fail to explain what the result means. Always interpret whether the business is in a strong position and whether the market itself is expanding or becoming more competitive.

KEY FORMULAS(s)

Profit and Profitability Formulas

These key formulas help you calculate different profit measures and profitability ratios used in business.

Gross Profit

Gross profit = Revenue − Cost of sales

The profit made after deducting direct costs.

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Remember: profit shows how much money has been made, while profitability shows how efficiently revenue is being turned into profit.

DATA TABLE

Income Statement for North Coast Coffee Ltd

This statement shows how revenue is converted into gross profit, operating profit and net profit.

Revenue

£250,000

Output

Fixed Costs

Variable Costs

Total Costs

Revenue

Profit / Loss

0 candles £1,200 £0 £1,200 £0 -£1,200

Net profit is the final profit remaining after all costs and expenses have been deducted from revenue.

Comparing Businesses in a Growing Market

This chart compares several businesses in the same market and shows how changes in total market size can affect market share. It helps students see that a business can increase sales but still lose market share if competitors grow faster.

WORKED EXAMPLE

Worked Example: North Coast Coffee

How many coffees must be sold to break even?

Fixed Costs

£1,800

equity + long-term debt

Break-even output = Fixed costs ÷ Contribution per unit

Contribution per unit = Selling price − Variable cost

£3.50 − £1.10 = £2.40

Step 1: Calculate contribution

£3.50 − £1.10 = £2.40

Contribution per unit is the amount each coffee contributes towards fixed costs.

BREAK-EVEN OUTPUT:

750 coffees per month

EXAM TIP

Always explain what the number means for the business. Do not just calculate the break-even point.

Create a 5 pointed blue outlined star ic

Understanding Market Size, Share and Growth

This diagram shows the difference between market size, market share and market growth, and explains how the three measures link together. It helps students understand what each measure tells a business and how each one is calculated.

APPLICATION

Aldi

Aldi is a useful real-world example for understanding market share, size and growth because it operates in the highly competitive grocery market. Managers need to know not only how much Aldi sells, but also how large the total grocery market is and whether Aldi’s share of that market is rising or falling.

If the grocery market grows, Aldi may be able to increase sales even without dramatically changing its market share. However, if Aldi’s market share rises, this suggests it is attracting customers more successfully than some rivals. This could happen because of lower prices, efficient operations, convenient stores or strong customer perceptions of value.

Market share also helps Aldi judge its competitive position. If Aldi’s sales increase but competitors grow faster, Aldi may still lose market share. This would encourage managers to review pricing, promotions, product ranges or store expansion plans.

This example shows why businesses need to look at market size, share and growth together. A growing market may offer opportunities, but a business still needs to compete effectively if it wants to gain a stronger position.

This independent educational case study is not affiliated with, endorsed by or sponsored by Greggs plc. Any financial figures used alongside this example should be treated as simplified or hypothetical estimates created for teaching purposes.

ANALYSIS

EXAM FOCUS

Analysis questions require you to examine a business concept or issue in detail, breaking it down into its component parts. You should explain how and why something happens and consider its impact on the business.

How to Approach Analysis Questions

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Identify the key issue or concept

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Break it down

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Explain how and why

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Reach a reasoned conclusion

Read the question carefully and highlight the focus of the analysis.

Consider the different factors, causes or impacts related to the issue.

Provide clear explanations using business terms and links points to context.

Evaluate the overall implications for the business.

Example Analysis Question

North Coast Coffee is considering using break-even analysis before opening a second café.

Advantages

• Sales forecasts may be inaccurate.

• Assumes costs and revenue remain constant.

• External factors may reduce reliability.

• Ignores qualitative business factors.

Disadvantages

• Sales forecasts may be inaccurate.

• Assumes costs and revenue remain constant.

• External factors may reduce reliability.

• Ignores qualitative business factors.

Key Exam Tip

If you find it difficult to expand your answer and show the type of depth that an examiner is looking for in a top response, consider using the 'so what' approach.

Tesco carry out market research - so what? - this allows them to better understand customer needs - so what? as a result Tesco can provide goods more likely to sell - so what? - this will increase Tesco profit and ensure higher levels of customer satisfaction - so what? this means that customers are likely to become more loyal to Tesco.

Avoid These Exam Traps

Students often lose marks on calculation and analysis questions by making these mistakes. Watch out for them in your exam!

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Helvetica Light is an easy-to-read font, with tall and narrow letters, that works well on almost every site.

Tip:

Helvetica Light is an easy-to-read font, with tall and narrow letters, that works well on almost every site.

2

Helvetica Light is an easy-to-read font, with tall and narrow letters, that works well on almost every site.

Tip:

Helvetica Light is an easy-to-read font, with tall and narrow letters, that works well on almost every site.

3

Helvetica Light is an easy-to-read font, with tall and narrow letters, that works well on almost every site.

Tip:

Helvetica Light is an easy-to-read font, with tall and narrow letters, that works well on almost every site.

Be precise. Read the question carefully. Show your working.

Small mistakes can cost big marks.

EXAM PRACTICE

Practice Question

Apply your knowledge of profit and profitability to answer this exam-style question.

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MINI CASE STUDY

North Coast Coffee Ltd is a premium coffee business which sells freshly roasted coffee beans through its online store and a small chain of independent cafés. The business has experienced strong sales growth due to increasing demand for high-quality speciality coffee products.

The business generates annual revenue of £250,000. Its cost of sales, including coffee beans, packaging and direct production costs, totals £100,000. North Coast Coffee Ltd also faces operating expenses of £80,000, including marketing, employee wages, rent and administration costs. In addition, the business pays £20,000 in interest and taxation each year.

The owner, Mia Thompson, is reviewing the company’s profitability because rising wage costs and increased competition in the premium coffee market have started to place pressure on operating profit margins. She is considering increasing prices slightly in order to protect profitability while still maintaining customer demand.

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EXAM QUESTION

Analyse the possible reasons for BrightBite’s falling profit margins and evaluate strategies it could use to improve profitability.

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HOW TO ANSWER

P

Point

E

Explain

A

Apply

C

Consequence

H

However...

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MODEL ANSWER

P

Point

Increasing prices could improve the profitability of North Coast Coffee Ltd because each sale would generate a larger amount of revenue and potentially increase profit margins.

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EXAMINER TIP

For full marks, make sure you analyse causes rather than just listing them, and evaluate realistic strategies with clear judgement. THINK: Which strategy would have the biggest impact and why?

CALCULATOR

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