How do banks create money out of thin air?
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tl;dr
Banks create money by lending: approving a loan posts a brand-new deposit in the borrower's account — no vault, no saver's cash. Repayment deletes it again. Interest rates, capital rules and willing borrowers keep the ledger in check.
Show the written answerThe written answer
Most money is not printed. It is typed. When a commercial bank approves a loan, it does not hand over notes from a vault or pass along some saver's deposit — it posts two entries in its own ledger: a loan (what you owe the bank) and a brand-new deposit in your account (what the bank owes you). That deposit is new money, spendable the moment it appears. The Bank of England spelled this out plainly in 2014: whenever a bank makes a loan, it simultaneously creates a matching deposit in the borrower's account, thereby creating new money. In the UK, roughly 97% of money is exactly this kind of ledger entry; only about 3% is physical cash.
The mechanism, as drawn
No money moves into place before the loan. The act of lending is the act of creation: one keystroke, two balancing entries. The borrower spends the deposit — on a house, a machine, a salary — and it circulates through the economy from account to account. The reverse is just as clean: when the loan is repaid, the deposit is deleted and that money ceases to exist. The money supply breathes in when banks lend and breathes out when loans are paid down.
Why the ledger doesn't run away
If creation is a keystroke, why don't banks type forever? Because every loan must survive contact with reality. Borrowers must exist who want credit and can plausibly repay it — bad loans burn the bank's own capital, and regulators require that cushion to be real. Spent deposits drain away to other banks and must be settled in central bank reserves. And the central bank's interest rate sets the price of every new loan, throttling demand up or down. The Bundesbank's engineers reached the same conclusion as the Bank of England's: banks are not intermediaries shuffling old savings; they create book money by accounting entry, inside limits drawn by policy, capital and profit.
What this redraws
The schoolbook picture — savers deposit, banks lend it out — has the arrows backwards. Loans create deposits, not the other way around. That is why credit booms swell the money supply and why waves of repayment after a crisis can shrink it. The printing press was never the interesting machine. The ledger is.
cited
Sources
- [01]Money creation in the modern economy — Bank of England Quarterly Bulletin 2014 Q1
“Whenever a bank makes a loan, it simultaneously creates a matching deposit in the borrower's bank account, thereby creating new money.”
- [02]How money is created — Deutsche Bundesbank
“This refutes a popular misconception that banks act simply as intermediaries at the time of lending — ie that banks can only grant credit using funds placed with them previously as deposits by other customers.”
people also ask
Keep asking
Can banks create unlimited money?
No. Every loan needs a borrower likely to repay, bad loans destroy the bank's own capital, spent deposits drain to rival banks and must be settled, and the central bank's interest rate prices every new loan. The keystroke is free; the loan is not.
Where does the money go when I repay a loan?
It is destroyed. Repayment reverses the original entries: your deposit shrinks and the loan on the bank's books shrinks with it. The money supply contracts a little every time a loan is paid down — creation and demolition are the same machine run backwards.
Doesn't the government print all our money?
Only the small part. In the UK about 3% of money is notes and coins from the central bank; roughly 97% is bank deposits, created by commercial banks when they lend. The state prints the cash but licenses and limits the ledger.
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