The circular flow of income — Economics, 14–17
The circular-flow model shows how households, firms, banks and the public sector are linked by flows of work, goods, money and saving. It is a map for seeing connections, not a complete picture of every economy.
Idea
Households offer work and receive wages; they use income to buy goods and services from firms. Firms receive sales revenue and use it to pay workers and buy resources. Money moves one way while work, products and services move the other way, forming a connected loop.
Why it was needed
A country’s economy can look like millions of separate choices, making it hard to see how one change spreads. If households save more, firms may receive fewer sales; if government spends more, someone receives extra income. The model helps trace these links before measuring their size.
Worked example
A bakery pays €2,000 in wages. Workers spend €1,500 at local firms and save €500 in a bank. The bakery and other firms receive the €1,500 as sales, while the bank can lend or invest the €500. Step by step, one payment becomes another person’s income, but saving temporarily leaves the spending loop.
The trap
It is easy to picture money physically travelling in a perfect circle, so the model may seem to say that every euro spent always returns unchanged. That is a reasonable reading of a simple diagram, but real economies have leaks and injections: imports, taxes and saving reduce spending here, while exports, investment and public spending add to it.
Where it appears
The model helps you read news about a spending slowdown, a rise in exports or a new public investment programme. It also helps explain why one person’s spending can support another person’s income. It does not prove that every extra euro creates the same boost, because unused resources, imports and capacity limits matter.
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