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Money’s functions: exchange, accounting and storing value

Money serves as a medium of exchange, a unit of account and a store of value, helping overcome difficulties of barter.

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The short answer

Money serves as a medium of exchange, a unit of account and a store of value, helping overcome difficulties of barter.

Why barter can be difficult

NCERT describes barter as exchange without money. It requires a double coincidence of wants: each participant must want what the other can offer. Finding that match can be difficult.

Money helps separate selling from purchasing. A seller can receive money and use it in a later exchange without needing the first buyer to supply the exact desired product.

Three functions, three questions

As a medium of exchange, money facilitates transactions. As a unit of account, it expresses prices in a common measure. As a store of value, it allows value to be held for later use, although its purchasing power is not guaranteed to remain unchanged.

A price label and a completed payment illustrate different functions. One measures value; the other transfers money in an exchange. Both can occur in the same purchase without being identical.

An original market example

Imagine a person who sells handmade notebooks but wants vegetables. Under direct barter, the vegetable seller must also want notebooks. With money, the notebook seller can sell to a different buyer and then purchase vegetables. This hypothetical example shows the matching problem without describing a real business.

For revision, place three headings on a page: payment, comparison and later use. Write an example under each and connect it to the corresponding function. If an MCQ asks which function a price list illustrates, focus on comparison rather than assuming every mention of money means a completed transaction.

This static explainer does not provide current interest rates, investment advice or a claim that cash cannot lose purchasing power. It introduces the economic functions rather than recommending any particular financial product.

Publication disclosure

This article was researched and published with AI assistance. No human prepublication review is claimed. Report factual errors through our contact page.

Frequently asked questions

What is double coincidence of wants?

Each barter participant wants what the other offers.

Which function does a price list illustrate?

Unit of account.

Sources & further reading

Sources reviewed 2026-10-15. Official statements describe the issuing organisation’s position; this article is an independent explainer.

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