Cambridge O Level Business Studies · Syllabus 7115 · External Influences on Business Activity
External Cost
What is External Cost?
A cost of a business decision that is borne by third parties rather than by the business making the decision. Because it does not appear in the firm's own accounts, it does not influence the decision unless regulation, taxation or reputational pressure brings it in. Examples include residents living with air pollution from a factory, congestion caused by traffic drawn to a new development, and communities absorbing the health effects of emissions. A cost the business itself pays, including a fine or clean-up bill, is a private cost, not an external cost.
This definition is part of the External Influences on Business Activity chapter in Cambridge O Level Business Studies.
External Cost in context
Government policy, environmental and ethical expectations, and globalisation are external forces a business cannot control but must trace through to a specific effect on itself. A change in taxation, government spending or interest rates reaches a business's costs, prices, demand and cash flow by a different route each time. A private cost is paid by the business itself; an external cost falls on a third party outside the decision — residents living with pollution, for example. Appreciation of the home currency helps importers and hurts exporters, and depreciation does the reverse, so the direction of any exchange-rate effect depends on naming the currency and the firm's position.
Common mistakes with External Cost
- “An external cost is a cost the business has to pay.” Fix The opposite. A cost the business pays is a private cost. An external cost falls on a third party who was not part of the decision. A pollution fine is a private cost; the residents' loss of clean air is the external cost.
Questions students ask about External Cost
What is the difference between a private cost and an external cost?
A private cost is a cost the business itself pays, such as a fine or a clean-up bill. An external cost falls on a third party who was not part of the decision and does not appear in the firm's own accounts, such as residents living with air pollution from a factory. Because an external cost does not affect the firm's own figures, it does not influence its decisions unless regulation, taxation or reputational pressure brings it in.