Banks create money by lending it out, not by printing it

When you borrow $10,000 from a bank, the bank does not hand you $10,000 that was sitting in a vault. Instead, the bank creates a new deposit account in your name with $10,000 in it. That money did not exist before you signed the loan agreement. The bank created it by recording a promise—your promise to repay—as an asset on its balance sheet, and simultaneously creating a liability (your deposit) of the same amount. This is how most of the money in the economy comes into being.

This process is called credit creation, and it is the primary way banks add money to the money supply. When millions of people and businesses borrow from banks at the same time, the total amount of money in circulation grows. When borrowers repay loans, that money disappears from the economy. Banks do not lend out deposits that customers have already placed with them—that is a common misunderstanding. Instead, banks lend based on their capital reserves and their ability to borrow from other banks and from the central bank (the Federal Reserve, in the United States).

Key Takeaways

  • Banks create money by issuing loans; the money comes into existence when you borrow, not from a pre-existing pool of customer deposits.
  • A bank must hold a fraction of its lending in reserve (set by the Federal Reserve), which limits how much total money a single bank can create.
  • The Federal Reserve controls how much money banks can create by raising or lowering the reserve requirement and by setting interest rates.
  • When a borrower repays a loan, that money is destroyed and removed from the money supply.
  • Banks profit from the difference between the interest rate they pay depositors and the interest rate they charge borrowers.

The reserve requirement limits how much a bank can lend

Banks cannot lend unlimited amounts. The Federal Reserve sets a reserve requirement—a percentage of deposits that banks must keep on hand and cannot lend out. As of 2023, this requirement is zero percent for most banks, though it was 10 percent for large banks before that rule changed. Even with a zero percent requirement, banks still maintain reserves for practical reasons: to cover daily withdrawals, to meet regulatory capital standards, and to stay solvent if loans default.

The reserve requirement acts as a brake on money creation. If a bank has $1 million in capital and a 10 percent reserve requirement, it can lend out roughly $9 million. That $9 million becomes new money in the economy. If the bank lends more than its reserves allow, it must borrow from other banks (through the interbank lending market) or from the Federal Reserve's discount window. The cost of borrowing constrains how aggressively a bank will lend.

The Federal Reserve controls the money supply through interest rates and reserve rules

The Federal Reserve does not create money directly by printing it (the Bureau of Engraving and Printing handles physical currency, which is a tiny fraction of the money supply). Instead, the Fed controls how much money banks create by setting the federal funds rate—the interest rate at which banks lend reserve balances to each other overnight. When the Fed raises this rate, borrowing becomes more expensive, banks lend less, and money creation slows. When the Fed lowers the rate, borrowing becomes cheaper, banks lend more, and money creation accelerates.

The Fed can also inject money directly into the banking system through open market operations. It buys government bonds or other securities from banks, crediting their reserve accounts with new money in exchange. This happened on a massive scale during the 2008 financial crisis and again in 2020 during the pandemic. The Fed created trillions of dollars this way, which banks then lent out into the economy.

Money disappears when loans are repaid

Just as money is created when a loan is issued, money is destroyed when the loan is repaid. When you pay back your $10,000 loan, that $10,000 is removed from your deposit account and ceases to exist as money in the economy. The bank records the repayment as a reduction in its assets (the loan is now paid off) and a reduction in its liabilities (your deposit is gone). The money supply shrinks by $10,000.

This is why the total amount of money in circulation depends on the total amount of debt in the economy. If borrowing slows and people pay down debt faster than new loans are issued, the money supply contracts. This happened during the 2008 recession and again during parts of the pandemic recovery. A shrinking money supply can slow economic growth because there is less money available for spending and investment.

Banks profit from the spread between deposit rates and loan rates

A bank's income comes from the difference between what it pays depositors and what it charges borrowers. If a bank pays 0.5 percent interest on savings accounts and charges 5 percent on car loans, the bank keeps the 4.5 percent difference (minus operating costs). This spread is called the net interest margin. The wider the spread, the more profitable the bank.

Banks also charge fees for services—overdraft fees, wire transfer fees, account maintenance fees—which add to their income. However, the primary source of profit for most banks is the interest spread. This is why banks want to lend as much as possible: each loan generates ongoing interest income. It is also why banks are sensitive to Federal Reserve interest rate changes. When the Fed raises rates, banks can charge borrowers more, but they also have to pay depositors more, which can squeeze the spread.

What happens if a bank lends recklessly

If a bank creates too much money through excessive lending and those loans default, the bank can become insolvent. This is what happened to many banks during the 2008 financial crisis. Banks had lent far more than their capital could support, and when borrowers stopped paying, the banks did not have enough reserves to cover the losses. The Federal Reserve and the federal government had to step in with emergency loans and capital injections to prevent a complete collapse of the banking system.

To prevent this, the Federal Reserve and other regulators set capital requirements—rules that force banks to hold enough capital (equity) relative to their lending. A bank with $1 billion in capital might be required to hold at least $80 billion in total assets, meaning it can lend out roughly $79 billion. If loans go bad and the bank loses money, the capital absorbs the loss. Once capital is depleted, the bank fails. These rules limit how much money any single bank can create and reduce the risk of a banking crisis.

The difference between money creation and inflation

Creating more money does not automatically cause inflation. Inflation occurs when the money supply grows faster than the economy's ability to produce goods and services. If a bank creates $1 million in new loans and borrowers use that money to buy goods that were already produced, prices may not change much—the money just circulates faster. But if banks create money much faster than the economy grows, there is more money chasing the same amount of goods, and prices rise.

During the pandemic, the Federal Reserve created trillions of dollars in new money, and inflation rose sharply. However, inflation was also driven by supply chain disruptions that reduced the availability of goods. The relationship between money creation and inflation is real but not one-to-one. Other factors—productivity, supply, wage growth, and expectations—all play a role.

Frequently Asked Questions

Where does the money come from when I get a loan?

The bank creates it. When you sign a loan agreement, the bank records your promise to repay as an asset and simultaneously creates a deposit account in your name with the loan amount. That deposit is new money that did not exist before. The bank does not withdraw it from a vault or from other customers' deposits.

Can banks create unlimited money?

No. Banks are constrained by capital requirements set by regulators, by the cost of borrowing reserves from other banks or the Federal Reserve, and by the risk that loans will default. A bank with $1 billion in capital can lend roughly $10 to $15 billion, depending on regulatory rules. Beyond that, the bank must raise more capital or borrow at higher cost.

What happens to money when I pay off my loan?

It disappears. When you repay a loan, the bank removes that amount from your deposit account and records the loan as paid off. The money is destroyed and removed from the money supply. This is why rapid loan repayment can slow economic growth—there is less money in circulation for other spending.

Does the Federal Reserve print all the money?

No. The Federal Reserve creates money electronically by crediting bank reserve accounts, but most money creation happens through bank lending. Physical currency (bills and coins) is printed by the Bureau of Engraving and Printing and represents only about 2 percent of the total money supply. The rest exists only as electronic deposits.

Why do banks want to lend so much if it is risky?

Because lending is profitable. A bank earns interest on every loan it issues. The more a bank lends, the more interest income it generates. Banks balance this profit motive against the risk of default by setting interest rates high enough to cover expected losses and by holding capital reserves to absorb actual losses.