How Banks Create Money: Follow a $1,000 Loan

What changes when a bank makes a loan?

The bank adds both an asset and a liability. Its asset is the borrower’s obligation to repay. Its liability is the deposit it owes the customer. The ECB distinguishes this commercial bank money from reserves, which banks hold at the central bank. ECB: what is money?.

We can trace the entries without assuming any growth forecast. Our hypothetical example, prepared 23 October 2026, uses USD throughout. Bank A grants a $1,000 loan. We ignore interest, fees, tax, provisions and other business. These are changes in balance sheets, not complete bank accounts.

The borrower has a spendable balance. But their financial assets and debt rise together. In this simplified example, their net financial wealth changes by $0.

Bank A has not earned a $1,000 profit either. Its new asset comes with a matching obligation. To see how banks create money, keep the loan and deposit columns together.

This is why “banks create money” and “loans must be repaid” describe the same transaction. A loan agreement alone is not the money. The deposit created when the loan is drawn is the money.

What happens when the borrower pays someone at another bank?

The deposit moves to the recipient’s bank, while banks settle the payment using central bank reserves. The Bank of England explains this settlement obligation as a practical constraint on lending. Creating a customer balance does not create the reserves needed to pay another bank. Bank of England: payment and reserve constraint.

Continue our hypothetical example. The borrower pays the entire $1,000 to a supplier at Bank B. Assume Bank A has enough reserves and settlement occurs directly, without netting against other payments.

The loan stays at Bank A. The new deposit now sits at Bank B. Across both banks, deposits remain $1,000 above their starting level. Aggregate reserves have not changed: one bank lost what the other gained.

We deliberately show the full payment. Real payment systems can offset incoming and outgoing transfers. That affects settlement needs, but it does not make the two ledgers interchangeable. Your deposit is the bank’s liability; reserves are its asset at the central bank. Our monetary base definition separates reserves from public deposits.

Why can banks not create unlimited money?

Banks must manage losses, funding and payment obligations while finding creditworthy borrowers. The Bank of England’s Money creation in the modern economy rejects a fixed process in which banks mechanically multiply a predetermined stock of reserves. It identifies profitability, regulation and monetary policy as constraints. Bank of England, Quarterly Bulletin 2014 Q1.

Capital absorbs losses. It is not the same thing as reserves available for payments. The ECB explains that banks build capital through investor funds and retained profits, with requirements reflecting their risks. A bank can have enough settlement money for today’s transfers yet lack sufficient capital for more risky lending. ECB Banking Supervision: why banks need capital.

Our example exposes a separate funding issue. After the supplier is paid, Bank A still owns the loan but has lost reserves. Repeating that transaction would keep draining its settlement resources unless it obtains funding or receives incoming payments. The ability to enter a deposit is not a promise that every subsequent payment is affordable.

What happens when a loan is repaid or defaults?

Principal repayment cancels a bank loan and a deposit. Default creates a loss on the loan; it does not automatically cancel the recipient’s deposit. The ECB’s explanations of money creation and repayment and loss-absorbing capital establish these distinct entries.

For our repayment example, assume the borrower later earns money and holds it at Bank A. Those earnings transfer existing deposits; no additional money is created. A $200 principal payment reduces their deposit by $200 and the bank’s loan asset by $200. The remaining principal is $800. The payment does not leave another customer with the repaid $200 deposit.

For a separate default scenario, assume the original loan has been spent and Bank A writes off $200 as wholly unrecoverable. In our simplified ledger, the loan asset and bank equity fall by $200. Bank B still owes its supplier the existing deposit. We exclude prior provisions and recoveries, which change the timing and accounting detail of real losses.

Do not apply the principal example to interest. Interest is income to the bank, with different accounting. We isolate principal here so the money-creation mechanism remains visible.

How does bank lending connect to M2?

Eligible customer deposits enter broad money; bank reserves do not enter US M2. The Federal Reserve defines M2 as M1 plus specified small time deposits and retail money market fund shares. Our M2 glossary explains that boundary. Federal Reserve money-supply definitions.

In our ledger, assume every customer deposit qualifies. Loan creation adds $1,000, the supplier payment adds nothing further, and the later principal repayment subtracts $200. That yields a net deposit increase of $800 from these transactions alone.

An economy-wide chart includes other transactions and classification changes. It cannot identify how much a particular bank lent. Use our data methodology to check the aggregate and observation date, and our money supply and inflation guide for the separate question of prices. Central-bank bond purchases follow another mechanism, covered in QE versus money printing.

Frequently asked questions

Does a bank lend another customer’s deposit to me?

Loan origination creates a matching deposit. Existing deposits still matter as funding, especially when payments leave the bank. Creation and funding answer different questions. Bank of England, 2014 explanation.

Does moving money between my own bank accounts create money?

In our example, a transfer changes the account or bank holding the deposit. It does not create an additional deposit across the banking system. Specific money aggregates can change when funds move between included and excluded account types.

Does every lender create bank deposits?

No. A non-bank lender can transfer an existing deposit to a borrower. The lender’s balance falls as the borrower’s rises. The Bank of England distinguishes this from a deposit-taking bank creating money through lending. New forms of digital money, Box A.