How Do Banks Create Money?

Banks and money are intertwined. It is not just that most money is in the form of bank accounts. The banking system can literally create money through the process of making loans. 

Start with a hypothetical bank called Bank. The bank has $10 million in deposits. 

At this stage, Bank is simply storing money for depositors and is using these deposits to make loans. 

The Federal Reserve requires  Bank to keep $1 million on reserve (10% of total deposits). It will loan out the remaining $9 million. By loaning out the $9 million and charging interest, it will be able to make interest payments to depositors and earn interest income for  Bank (for now, we will keep it simple and not put interest income on the balance sheet). 

Instead of becoming just a storage place for deposits, Bank can become a financial intermediary between savers and borrowers.

 Bank lends $9 million to a business, which is deposited in the business’s bank account at National bank.

Making loans that are deposited into a demand deposit account increases the M1 money supply. Remember the definition of M1 includes checkable (demand) deposits, which one can easily use as a medium of exchange to buy goods and services. 

Notice that the money supply is now $19 million: $10 million in deposits in Bank and $9 million in deposits at National. 

Creation of money in this way is possible because there are multiple banks in the financial system, they are required to hold only a fraction of their deposits, and loans end up deposited in other banks, which increases deposits and, in essence, the money supply.

Related Topics

• Legal Tender
• Numismatics
• Gresham's Law
• Barter
• Double Coincidence of Wants
• Parity
• Functions of Money
• Medium of Exchange
• Unit of Account
• Store of Value
• Time Value of Money
• Standard of Deferred Payment
• Liquidity Preference Theory
• National Savings and Investment Identity
• Circular Flow of Money
• Commodity Money
• Gold Exchange Standard
• Bretton Woods System
• Fiat Money
• Money Supply
• M1 and M2 Money Supply
• Monetary Base
• Savings, Demand, and Time Deposits
• Banks
• How Do Banks Create Money? 
• Financial Intermediary
• Bank Balance Sheet
• Money Multiplier Formula
• Velocity of Money
• Multiplier Effect
• Quantity Equation of Money
• McCallum Rule
• Neutrality of Money
• Real Bills Theory
• Banking System?
• Central Bank
• Federal Reserve System
• Federal Open Market Committee (FOMC)
• Fed Balance Sheet
• Term Auction Facility
• Taylor Rule
• How is the Federal Reserve Bank Organized?
• What is Bank Regulation?
• CAMELS Rating
• FDIC
• CFPB
• Bank Supervision
• Bank Runs
• What is Deposit Insurance?
• Federal Deposit Insurance Corporation
• Lender of Last Resort
• Central Banks Carry Out Monetary Policy
• Open Market Operations
• Bank Reserve
• Discount Rate
• Federal Funds Rate
• Monetary Policy
• Contractionary and Expansionary Monetary Policy
• Loose vs Tight Monetary Policy
• Easy Monetary Policy 
• Accommodative Monetary Policy
• Dove & Hawk (Monetary Policy) - Explained
• Tight Monetary Policy - Explained
• Stabilization Policy
• Pushing on a String
• The Effect of Monetary Policy on Interest Rates
• Federal Funds Rate
• Gibson Paradox
• Vasicek Interest Rate Model
• Equation of Exchange (Economics)
• The Effect of Monetary Policy on Aggregate Demand
• Quantitative Easing
• Reserve Currency
• What are Excess Reserves?
• Unpredictable Movements of Velocity
• Central Banks - Unemployment and Inflation
• Inflation Targeting
• Fisher Effect
• Asset Bubbles and Leverage Cycles
• Countercyclical
• Money Capital Market
• Quantity Theory of Money
• Aggregate Expenditure Model
• IS-LM Model
• European Capital Market Institute