How Money Is Created Today | Money & Banking Deep Dive

Section 2 of 6 · The mechanism

Coming from The History of Money, you saw the same pattern repeat: whoever could create money eventually created more of it. This section asks the present-tense version — today, who actually creates the money you use, and how?

Most money isn't printed — it's lent into existence

Picture a printing press in a government basement. That image is almost entirely wrong. Modern money enters the economy through two connected layers, and the bigger one isn't the government at all.

Layer 1 — Base money (government + central bank)

When the government spends more than it taxes, it borrows by issuing Treasury bonds.
The central bank can buy those bonds from banks, paying with newly created digital reserves.
Base money = physical cash + bank reserves held at the central bank.

Layer 2 — Credit money (commercial banks)

Commercial banks create new money when they make loans.
The act of lending writes a new deposit into existence — money that did not exist a moment before.
When loans are repaid, that money disappears again.

Roughly 90% of the money in the economy is this credit money, not central-bank base money (Bank of England, Money creation in the modern economy, 2014).

What the money supply is actually made of

Most of the money you use was created by commercial banks making loans — not printed by the central bank.

Approximate split, illustrative. Source: Bank of England, Money creation in the modern economy (2014). Exact shares vary by country and over time.

Common misconception

"Banks just lend out the deposits other people put in — like a middleman moving existing money around."

Not quite. In modern banking, a bank doesn't wait for your deposit and pass it along one-for-one. When a bank approves a loan, it creates a new deposit at the same moment — the loan and the new money appear together. Reserves and capital constrain how much banks can do this, but the deposit you see was, in most cases, created by lending, not relayed from a saver. (Bank of England, 2014.) This is why the simple "money multiplier" picture below is a useful teaching model, not a literal description of the order of events.

The two-layer fountain

Adjust how much banks must hold back. Watch a fixed amount of base money turn into a much larger pool of credit money.

Reserve held back: 10%

5% (more lending)25% (less lending)

Layer 1 · Base money (fixed)

$100B

Layer 2 · Total money supply

$1,000B

×10 multiplier

At a 10% hold-back, every $1 of base money supports about $10 of total money — and roughly 90% of it was created by commercial-bank lending, not the central bank.

Simplified textbook model. Real lending is limited by bank capital, regulation, and loan demand — and many countries (including the US since March 2020) have a 0% reserve requirement, so capital rules do the constraining instead.

The faucet handle: interest rates

Central banks don't create most of the money — but they set the price of borrowing, which decides how fast commercial banks create credit money.

Cheaper money, faster credit

Move the rate and see which way credit creation leans.

Central-bank interest rate: 5%

0% (easy money)15% (tight money)

Hold this question for the control room

If most money is created by private banks lending, and the central bank mainly sets the rules and the price of credit, then a small committee's decisions ripple through everyone's money. How much power should that committee have — and what happens when it uses it? That's section 4.

What you've added to the investigation: money is mostly created by banks when they lend, with the central bank setting the terms. Next: if lending creates money, what happens when too many people want that money back at once?