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External influences: PESTLE and the changing competitive environment

Edexcel IAL Business · WBS13 Business decisions and strategy

No business operates in isolation. PESTLE analysis is a checklist of the external forces that create opportunities and threats, and businesses must also respond as their competitive environment changes.

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PESTLE

Factor	Examples of influences
Political	Government stability, trade policy and tariffs, government spending, subsidies, taxes, relations between countries
Economic	Economic growth or recession, interest rates, exchange rates, inflation, unemployment, consumer incomes
Social	Demographic change (ageing population), lifestyle and tastes, attitudes to health and the environment, education
Technological	New products and processes, automation, e-commerce and mobile technology, data and artificial intelligence
Legal	Consumer protection, employment law (minimum wage, health and safety), competition law, intellectual property (patents, copyright)
Environmental	Climate change, pollution controls, emissions targets, extreme weather, consumer demand for sustainable products

How to use PESTLE in an answer

A factor only matters if you explain its effect on the business in the question:

Name the factor and the direction of change (interest rates are rising).
Explain the chain of effects (higher loan repayments for households, so less spending on cars; higher cost of the firm's own loans).
Judge how significant it is for this business compared with other factors, and over what time scale.

In the January 2025 WBS13 paper, Question 2 asked how far legal factors explained a technology firm's success; the mark scheme credited intellectual property protection and legal action against a rival, and on the other side the cost of legal disputes and the importance of other PESTLE factors.

The changing competitive environment

The number, size and behaviour of rivals changes over time:

New entrants, including firms from other countries or other industries (for example technology firms entering finance).
Rivals leaving, merging or being taken over.
Changes in rivals' strategies: price cuts, new products, aggressive promotion.
Technology that lowers barriers to entry, such as selling online.

Responses include cutting costs, differentiating more strongly, innovating, finding a niche, or merging with a rival. The best response depends on the firm's strengths and the scale of the change.

Worked example

A car maker exports most of its output to another country. The domestic currency strengthens sharply. Analyse the effect, using PESTLE.

This is an economic factor: the exchange rate.
A stronger currency makes the firm's cars more expensive in the foreign currency, unless it cuts its margin.
If demand abroad is price elastic, sales and revenue fall.
On the other hand, imported components become cheaper, cutting costs. The overall effect depends on price elasticity, the share of imported inputs and how long the change lasts.

Answer: Exports become dearer abroad and sales may fall, partly offset by cheaper imported components.

Key idea: PESTLE: political, economic, social, technological, legal and environmental factors. Always explain the chain of effects on the specific business and judge its importance. The competitive environment changes as firms enter, leave or change strategy.

Check yourself

A rise in interest rates is which type of PESTLE factor?
- Economic
- Political
- Social
- Legal
Show answer
Economic. Interest rates are part of the economic environment.
An ageing population is which type of PESTLE factor?
- Technological
- Environmental
- Social
- Economic
Show answer
Social. Demographic change is social.
A new law raising the minimum wage is best classified as
- legal
- social
- technological
- environmental
Show answer
legal. Employment law is a legal factor (with political roots).
A business has large loans and sells expensive household goods bought on credit. What is the most likely effect of a rise in interest rates?
- Its costs fall and demand rises
- Demand rises because saving becomes less attractive
- It has no effect because interest rates only affect banks
- Its interest costs rise and demand for its goods falls
Show answer
Its interest costs rise and demand for its goods falls. Higher borrowing costs for the firm and its customers.
Which change is most likely to increase competition in a retail market?
- A merger between two of the largest retailers
- Online selling lowering the cost of entering the market
- A new law requiring expensive licences to trade
- A rival closing every one of its stores
Show answer
Online selling lowering the cost of entering the market. Lower entry costs bring new rivals.
A bank introduces an app that lets customers open accounts without visiting a branch. This is a response to a change in which PESTLE factor?
- Legal
- Political
- Environmental
- Technological
Show answer
Technological. Mobile technology.
Explain how growing consumer concern about the environment could affect a fast-food business.
Show answer
Customers may switch to rivals with sustainable packaging and ingredients, so the business may need to invest in recyclable packaging and greener supply, raising costs in the short term but protecting sales and its brand.. Name who responds, what they want, and the effect on the business.

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Last updated 8 November 2026. Spotted a mistake? Tell us.