Cambridge O Level Business Studies · Syllabus 7115 · External Influences on Business Activity
Interest Rate
What is Interest Rate?
The cost of borrowing money, and the reward for saving it, expressed as a percentage of the sum borrowed or saved over a period. A rise in interest rates increases the cost of servicing loans and overdrafts for businesses and reduces the amount households can afford to borrow, which weakens demand for products commonly bought on credit. The size of the effect on any business depends on how much it has borrowed, whether that borrowing is at a variable rate, and whether its customers buy on credit.
This definition is part of the External Influences on Business Activity chapter in Cambridge O Level Business Studies.
Interest Rate 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.
Examiner tips on Interest Rate
- What this gives you in an answer. When a case says the government has raised interest rates, you can say why: it is almost always pursuing the low-and-stable-inflation objective, accepting a cost to growth. That single sentence turns a description into an explanation.
Questions students ask about Interest Rate
How do rising interest rates affect a business?
A rise in interest rates increases the cost of servicing any loans and overdrafts the business already has, and it reduces how much households can afford to borrow, which weakens demand for products commonly bought on credit. The size of the effect depends on how much the business has borrowed, whether that borrowing is at a variable rate, and whether its own customers buy on credit.
Why do answers like "interest rates rise, so costs increase, so profit falls" score poorly?
Because it is three assertions with no actual business in them. A strong answer names the firm, names the specific cost or effect, traces the mechanism — which cost, for which firm, financed how — through to the stated objective, and then names the condition that could reverse the outcome. A generic chain like that could be pasted into any case study without changing a word, so it earns few marks.

