Banks Create Money by Lending It, Not by Lending Out Deposits
The textbook story has savers deposit money that banks then lend. The actual sequence runs the other way, and the difference matters for understanding almost everything else.
The Textbook Version
The traditional explanation runs like this. A saver deposits 100. The bank holds a fraction as reserves and lends the rest. That loan becomes a deposit elsewhere, which is partly lent again, and the process repeats until an initial deposit has supported a multiple of lending.
It is a tidy story and it describes the mechanism backwards.
What Actually Happens
When a bank approves a loan, it credits the borrower account. Both sides of the balance sheet expand simultaneously: a new asset, the loan, and a new liability, the deposit.
No pre existing deposit was required. The bank did not move anyone money. It created a new deposit at the moment it created the loan.
Lending creates deposits. Deposits do not fund lending. Central banks including the Bank of England have stated this explicitly, and it contradicts what most introductory texts still teach.
The deposit then typically moves, since borrowers spend. When it moves to another bank, the first bank must settle, and that is where reserves become relevant, as a settlement mechanism rather than as a lending constraint.
What Actually Constrains Lending
| Constraint | How it binds |
|---|---|
| Capital requirements | Each loan requires equity behind it |
| Profitable demand | Creditworthy borrowers who want to borrow |
| Funding cost and availability | Settling outflows requires funding |
| Risk appetite and management | Internal limits |
| Reserve requirements | Minimal or zero in many systems now |
Capital is the binding constraint in practice. A bank must hold equity against its assets, so expanding the loan book requires either more equity or a shift toward assets carrying lower capital charges.
Several major central banks have reduced reserve requirements to zero, which would be impossible if reserves were what enabled lending.
Why It Matters
Several conclusions follow that the textbook version obscures.
Central banks influence lending primarily through the price of money and through capital regulation, not by controlling a quantity that banks then multiply.
Quantitative easing did not mechanically produce lending. It increased bank reserves, and since reserves were not the constraint, lending did not expand proportionally. Much of the created reserves simply sat at the central bank, which surprised commentators expecting the multiplier to operate.
And bank lending decisions determine the money supply far more than any central bank quantity target does. When banks lend enthusiastically, broad money grows. When they retrench, it contracts, which is precisely what makes credit conditions so central to the economic cycle.
Where Reserves Do Matter
Reserves are the settlement asset between banks. When a customer of Bank A pays a customer of Bank B, reserves move from A to B.
A bank losing deposits must obtain funding, either by attracting new deposits, borrowing in wholesale markets, or borrowing from the central bank. A bank unable to do so has a liquidity problem regardless of whether its loans are sound.
This is why a solvent bank can fail. The constraint is not the quality of its assets but its ability to settle outflows, and that is the problem every bank run represents.
The Limit That Still Exists
None of this means lending is unconstrained. A bank creating loans creates claims on itself, and those claims will be exercised. Lending recklessly produces losses that consume capital, and capital exhaustion is failure.
The discipline is competition, capital regulation, and the fact that bad loans are not repaid. It is simply not the discipline of having to find a depositor first.
The Bottom Line
Banks create deposits when they lend rather than lending out deposits they already hold. The binding constraints are capital, creditworthy demand, and the ability to fund outflows, not reserves, which several systems no longer require at all. Understanding the correct sequence explains why quantitative easing did not mechanically produce lending and why bank credit drives the money supply.