Functions of Money: Economics Notes for B.A. (General)

Functions of Money

Course: B.A. (General) – Economics
Topic: Functions of Money

Money is the medium that facilitates exchange, measurement, and saving in an economy.
It performs four fundamental economic functions:

Function	What it Does	Why It Matters
Medium of Exchange	Allows goods/services to be traded without barter.	Eliminates double‑coincidence problem.
Unit of Account	Provides a common measure for pricing and comparing goods.	Enables budgeting, accounting, and economic analysis.
Store of Value	Keeps value over time so that people can postpone consumption.	Supports saving, investment, and long‑term planning.
Standard of Deferred Payment	Enables credit and future obligations to be settled in money.	Facilitates loans, contracts, and installment sales.

Note: Some economists add a Standard of Value (i.e., a unit of value) and a Standard of Value Transfer (good for measuring wealth). But the four listed above are the core functions widely taught.

1. Simple Explanation

Medium of Exchange
Money is accepted by everyone as a payment for goods/services. Think of a loaf of bread costing 10 rupees—both parties accept the 10‑rupee note.
Unit of Account
Prices are expressed in a common “currency” so we can compare a book (₹200) with a pair of shoes (₹150). Money is the yardstick.
Store of Value
Money can be saved and used later. A savings account holds ₹5,000 today; you can spend it in a month.
Standard of Deferred Payment
Money makes it possible to borrow now and pay later. A ₹10,000 loan is repaid in ₹1,200 installments.

2. Key Points

Function	Key Points
Medium of Exchange	• Eliminates barter’s double‑coincidence. • Enhances market efficiency.
Unit of Account	• Facilitates price signals, cost‑benefit analysis. • Central to national accounts (GDP, inflation).
Store of Value	• Requires stability (low inflation). • Subject to “time‑value of money” (interest).
Standard of Deferred Payment	• Enables credit markets, mortgages, bonds. • Requires trust in the payment system.
General Conditions	• Must be divisible, durable, portable, recognizable, and uniform.
Types of Money	• Commodity money (gold, silver). • Fiat money (paper/coin issued by a government). • Bank money (deposits, digital balances).

3. Worked Example

Scenario

A farmer, Ravi, grows 100 kg of wheat. He sells it to a miller, Sneha, who pays in ₹500 cash.

Step	What Happens	Function Illustrated
1. Ravi offers wheat	Wheat is a commodity.
2. Sneha pays ₹500	Cash is accepted.	Medium of Exchange
3. Price per kg	₹500 ÷ 100 kg = ₹5/kg	Unit of Account
4. Ravi stores ₹500	Keeps it in a bank for next sale.	Store of Value
5. Sneha uses wheat	She will later sell flour to consumers who will pay in money.	Standard of Deferred Payment (future sale, future payment)

Inflation Twist

Suppose inflation is 10% per year. After one year, Ravi’s ₹500 worth of money can buy only ₹450 worth of wheat. Thus, the store‑of‑value function is weakened unless interest compensates for inflation.

4. Quick Revision Summary

Money = Medium of exchange, unit of account, store of value, standard of deferred payment.
Medium of Exchange: eliminates barter; essential for markets.
Unit of Account: common price yardstick; enables comparison & accounting.
Store of Value: keeps purchasing power; affected by inflation & interest.
Standard of Deferred Payment: underpins credit, loans, mortgages.
Key Conditions for Money: divisible, durable, portable, recognizable, uniform.
Types of Money: commodity, fiat, bank (digital) money.
Inflation: erodes the store‑of‑value; interest can offset.
Trust & Institutions: central banks, payment systems maintain money’s functions.

Tip for Exams: When asked “Explain the functions of money,” list the four functions, give a brief definition, and illustrate each with a real‑world example (e.g., buying a loaf of bread