What money is for

Before money, people swapped goods. Money makes trade much easier, but only because we all trust it.

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From swapping to money

Before money, people used barter: swapping goods directly, such as a sack of grain for a pair of shoes.
Barter is hard: you need to find someone who has what you want and wants what you have.
Money solves this problem because everyone accepts it.

Three functions of money

Money has three main jobs:
Medium of exchange: it is accepted in payment for goods and services.
Unit of account: it measures value, so we can compare prices.
Store of value: it can be saved and used later (though rising prices, called inflation, can reduce what it buys).

Forms of money

Money comes in different forms: cash (notes and coins), debit cards and contactless payments, bank transfers, and mobile payment apps.
In the UK, the Bank of England issues banknotes (in England and Wales) and the Royal Mint makes coins.
When you pay by card or phone, the money moves between bank accounts. It is easy to lose track of digital spending, so check your balance.
Worked example

Jack has 3 football cards and wants a book. Sana has a book but wants a hat. Why is barter hard here, and how does money help?

  1. Barter needs both people to want what the other has.
  2. Sana does not want football cards, so no swap can happen.
  3. With money, Jack can buy the book, and Sana can use the money to buy a hat from someone else.

Answer: Their wants do not match, so they cannot swap; money is accepted by everyone, so trade can happen.

Key idea

Money is a medium of exchange, a unit of account and a store of value. It replaced barter. In the UK, the Bank of England issues notes and the Royal Mint makes coins.

Common mistakes
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Extra practice

2 more questions

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  1. A farmer swaps eggs for a neighbour's firewood without using money. What is this called?

    1. Barter
    2. Inflation
    3. Interest
    4. Credit
    Show the answer

    Answer: Barter

    Barter means swapping goods or services directly without money.

  2. You pay £3 for a sandwich. Which function of money is this?

    1. Store of value
    2. Medium of exchange
    3. Unit of account
    4. Barter
    Show the answer

    Answer: Medium of exchange

    Money used to buy and sell is acting as a medium of exchange.

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Sources and references

Checked by the GCSE-ready editorial team, 23 October 2026. Last updated 2 October 2026. Spotted a mistake? Tell us and we will fix it.

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