HomeFinance & EconomicsBankingWhat is Fractional Reserve Banking?
Finance & Economics·2 min·Updated Mar 11, 2026

What is Fractional Reserve Banking?

Fractional Reserve Banking

Quick Answer

This banking system allows banks to keep only a fraction of their deposits as reserves while lending out the rest. It helps banks create money and provides liquidity to the economy.

Overview

Fractional reserve banking is a system where banks are required to keep a fraction of their deposits as reserves and can lend out the remainder. For example, if a bank has $100 in deposits and the reserve requirement is 10%, it must keep $10 in reserve and can lend out $90. This process creates new money in the economy, as the borrowed funds can be deposited again, allowing banks to lend even more. The way this works is that when you deposit money in a bank, the bank does not just store it. Instead, it uses a portion of that money to provide loans to borrowers, who may use the funds for various purposes like buying a house or starting a business. This lending activity stimulates economic growth, as it enables individuals and businesses to invest and spend. Fractional reserve banking is important because it helps manage the money supply and influences interest rates. However, it also carries risks, such as the potential for bank runs if too many people withdraw their money at the same time. Understanding this banking system is crucial for grasping how modern economies function.


Frequently Asked Questions

If many customers withdraw their deposits at once, the bank may not have enough cash on hand due to the fractional reserve system. This situation can lead to a bank run, which can threaten the bank's stability and potentially lead to its failure.
When banks lend out more money, it can lead to an increase in the money supply, which often lowers interest rates. Conversely, if banks hold onto more reserves and lend less, it can reduce the money supply and potentially raise interest rates.
While fractional reserve banking is a widely used system, it does come with risks. Regulatory measures and insurance systems, like the FDIC in the United States, help mitigate these risks, but no system is completely without potential issues.