What Money Actually Is
Why a piece of paper with Gandhi on it can buy lunch, why a UPI ping can too, and why the government cannot simply print more.
The country that pays for chai with a QR code still loves cash
In the financial year that ended in March 2025, Indians made about 18,600 crore payments through UPI, roughly 50 crore every single day. A vegetable seller in Rajkot, a toll booth on the Mumbai–Pune expressway and a temple donation box in Varanasi all display the same QR code. No country in the world makes more real-time digital payments. And yet, over the same years, the value of cash in circulation kept rising too, to well over ₹30 lakh crore.
Both facts are true at once because they answer the same question in different ways. People do not want paper or pixels for their own sake. They want something that everyone else will accept, that keeps its value until they spend it, and that lets them compare prices. That is what money is. The form keeps changing, from grain and shells to coins, notes and now numbers on a phone, but the jobs money does have stayed exactly the same for thousands of years. Understanding those jobs is the foundation for everything else in this course.
The mango village: what happens when you print more money
Drag the slider to print more rupees. The village still has exactly 100 mangoes.
Before Money: The Problem With Barter
Imagine a village with no money at all. A farmer has a sack of bajra and wants a piece of cloth. To get it, he has to find a weaver who wants bajra, today, in roughly the amount he is offering. If the weaver wants oil instead, the farmer must first find someone who will swap bajra for oil, then take the oil to the weaver. Economists call this the double coincidence of wants: both people must want exactly what the other has, at the same moment. In a village of a few hundred people, trading this way is slow. In a country of 140 crore people, it would be impossible.
Money solves the problem by acting as a go-between that everyone accepts. The farmer sells bajra to anyone who wants it, receives money, and spends that money on cloth from anyone who sells it. Neither side needs to want what the other produces. Money does three separate jobs to make this work, and it is worth learning them by name because every later idea in this course leans on at least one of them.
Medium of exchange: money is accepted in return for goods and services, so buying and selling no longer need to be matched one to one.
Unit of account: prices are written in one common measure, the rupee, so a kilo of tomatoes, a bus ticket and a month’s rent can be compared directly.
Store of value: money earned today can be spent next month or next year. A sack of bajra rots; ₹5,000 in a bank account does not, although, as Unit 5 shows, inflation slowly eats away at what it can buy.
When something does all three jobs well, people treat it as money, whatever it is made of. When it stops doing one of them, for example when prices rise so fast that money is a poor store of value, people start abandoning it for something else, often gold or a foreign currency. That pattern repeats throughout history and is the reason central banks care so much about keeping prices stable.
Why a Piece of Paper Is Worth ₹500
A ₹500 note costs the Reserve Bank of India only a few rupees to print. The paper, ink and security thread are worth almost nothing. Yet a shopkeeper will hand over ₹500 worth of groceries in exchange for it without a second thought. The note has value because of two things: trust and law.
Trust means that the shopkeeper is confident his own suppliers will accept the same note tomorrow. Law means that the note is legal tender: by law it must be accepted to settle a debt in India. Every note carries the line “I promise to pay the bearer the sum of five hundred rupees,” signed by the RBI Governor. That promise is not a promise to swap the note for gold, which ended long ago. It is a promise that the note will keep being honoured as five hundred rupees of money.
Money that has value because a government declares it to be money, rather than because it is made of something valuable, is called fiat money. Almost every currency in the world today, including the rupee, the dollar and the euro, is fiat money. The Reserve Bank of India issues the rupee and is responsible for protecting the trust behind it, mainly by keeping inflation under control.
Who Makes Money, and How Much
The RBI prints notes, and the government mints coins. But most of the money in India is not cash at all. It is the balances sitting in bank accounts, and a large part of that is created by banks themselves. When a bank gives someone a ₹10 lakh home loan, it does not hand over a suitcase of notes. It adds ₹10 lakh to the borrower’s account, who then pays the builder, whose account grows by ₹10 lakh. New money has appeared in the system as a bank deposit.
This is why the RBI does not control money just by deciding how many notes to print. It influences how much banks lend by changing the price of borrowing, the repo rate, which Unit 4 and Unit 5 return to. When the repo rate is low, loans are cheaper, banks lend more, and more money flows into the economy. When it rises, as it did to 5.50% on October 7, 2026, borrowing becomes more expensive and the flow slows down.
Why the Government Cannot Just Print More
It is a question almost every student asks at some point. If many people are poor, why not print lakhs of crores of new notes and give them away? The answer comes from a simple observation: printing money creates more rupees, but it does not create more goods.
Picture a small village with exactly 100 mangoes and ₹1,000 in circulation. If people spend all their money on mangoes, each mango sells for about ₹10. Now the government prints another ₹1,000 and hands it out. People feel richer and rush to buy mangoes, but there are still only 100 of them. Sellers can now charge about ₹20 each. Everyone has twice as many rupees, and everything costs twice as much. Nobody is better off, and anyone who had saved money before the printing is now worse off, because their savings buy half as much.
Real economies are more complicated than one village, but the logic holds. When money grows much faster than the goods and services an economy produces, prices rise. When it grows wildly faster, prices can explode. Zimbabwe in 2008 and Venezuela in the late 2010s printed money to pay their bills, and prices rose so fast that shops changed them several times a day. Zimbabwe eventually printed a 100 trillion dollar note that could not buy a loaf of bread. People abandoned the local currency for US dollars, because it had stopped doing the store-of-value job entirely.
Money You Never Touch: UPI and the Digital Rupee
When you pay ₹20 for chai using UPI, no note moves anywhere. Your bank reduces the number in your account by 20, the chaiwala’s bank increases the number in his by 20, and a system run by the National Payments Corporation of India (NPCI) passes the message between them in a couple of seconds. Money has become a set of trusted records rather than a physical object.
Notice the shape of that chart. Growth was slow for the first two years, then exploded after 2020, when the pandemic made people wary of handling cash and smartphones became cheaper. A system that processed under 100 crore payments in its first full year handled more than 18,500 crore in FY25. Digital payments did not replace cash so much as add an enormous new layer of small, everyday transactions that used to happen in coins.
The RBI is also testing a digital rupee, called the e-rupee, which has been in pilot since December 2022. The difference matters. A UPI payment moves money between bank accounts. An e-rupee is like a digital banknote issued directly by the RBI and held in a wallet on your phone. Both are still the same rupee, and both still depend on trust.
Deep Dive: What Makes Good Money
Over centuries, people have used cattle, salt, shells, silver and gold as money. Some worked better than others, and the reasons tell you what money needs to be. Good money is durable, so it does not rot. It is portable, so you can carry it to market. It is divisible, so you can pay for small and large things. It is uniform, so one unit is as good as another. Its supply is limited, so it cannot be created at will. And above all, it is widely accepted.
Gold scores well on most of these, which is why it was money for so long and why Indian families still treat it as a store of value. Cryptocurrencies such as Bitcoin score well on limited supply and portability, but poorly on stability: Bitcoin can move 10% in a day, which makes it a weak unit of account and an unreliable store of value. India taxes gains from crypto at a flat 30% and deducts 1% at source on transfers, and it is not legal tender. That is why, whatever its merits as a speculative asset, it has not become money in the everyday sense.
Case Study: The Night 86% of India’s Cash Stopped Being Money
On the evening of November 8, 2016, the government announced that ₹500 and ₹1,000 notes would stop being legal tender at midnight. Those two notes made up about 86% of the value of all cash in circulation. Overnight, most of the money in people’s wallets could no longer be spent in shops. It had to be deposited in banks or exchanged for new notes, and for weeks people queued outside branches and ATMs.
The aim was to destroy black money hidden in cash. In the end, the RBI reported that about 99.3% of the cancelled notes came back into the banking system, so very little cash was actually destroyed. What the episode did show, very clearly, is what money depends on. A note is money only while the law and the public agree that it is. Remove that agreement and a ₹1,000 note becomes a piece of paper. The shock also pushed millions of people towards digital payments for the first time, which is part of the story behind Fig 1.3.
Check yourself
0/12 answered1. The “double coincidence of wants” describes a problem with:
2. Which of these is NOT one of the three jobs of money?
3. A ₹500 note is worth ₹500 mainly because:
4. In the mango village, the government prints enough money to double the money supply. What happens?
5. When a bank gives a ₹10 lakh home loan, it usually:
6. Which tool does the RBI mainly use to influence how much banks lend?
7. When you pay ₹20 for chai with UPI:
8. Based on Fig 1.3, roughly how many UPI transactions were made in FY25?
9. How is the RBI’s digital rupee (e-rupee) different from a UPI payment?
10. Why has Bitcoin not become everyday money in India?
11. In November 2016, about what share of India’s cash by value was cancelled overnight?
12. What does demonetisation show about money?
Track every payment your household makes over three days: who paid, how much, for what, and by which method (cash, UPI, card or bank transfer). Work out what share of the number of payments and what share of the value went digital. Then write 150 to 200 words explaining which of money’s three jobs each method does well, and why your family still uses cash for some things.