Transaction Demand for Money
Start with an everyday intuition
Think about why you carry cash in your pocket or keep money in your savings account. You don't hold money because you love the paper — you hold it because you need to buy things. Between the day you receive your pocket money and the day you spend it, there's a gap. During that gap, you're holding money for no other reason than to make transactions.
That's the core idea: people hold money because they have to pay for goods and services. The more you plan to spend, the more money you need to hold. This is the transaction demand for money.
The precise meaning
In economics, the transaction demand for money refers to the amount of money people and firms want to hold specifically to carry out everyday purchases. It is one of the three motives for holding money identified by Keynes (the other two being precautionary and speculative demand).
The key insight is simple: money is a medium of exchange. If you need to buy groceries, pay rent, or purchase raw materials for your business, you need money in hand (or in your current account) to do so. You cannot pay for most things with your house or your shares — you need the liquid asset called money.
Why it matters
The transaction demand for money creates a direct link between how much money people want to hold and the level of economic activity. When national income rises, people buy more goods and services, so they need to hold more money for transactions. When income falls, they need less.
This relationship is important for understanding how central banks influence the economy. If the central bank prints too much money but people only need a certain amount for transactions, the extra money will chase the same goods — leading to inflation.
The formula (NCERT-based)
MT=k⋅PY
Where:
- MT = transaction demand for money (nominal)
- k = a constant fraction (the proportion of income people want to hold as money for transactions)
- P = general price level
- Y = real national income (or real GDP)
This is the Cambridge equation (also called the cash-balances approach). It says that the amount of money people want to hold for transactions is proportional to their nominal income (PY).
In the NCERT Class 12 Macroeconomics textbook, this is presented as part of the demand for money chapter. The constant k is assumed to be stable in the short run, so the transaction demand for money depends primarily on nominal income.
A diagram in words
Imagine a graph with nominal income (PY) on the horizontal axis and transaction demand for money (MT) on the vertical axis. The relationship is a straight line through the origin with slope k. As nominal income increases, transaction demand for money increases proportionally. …