Reserve Ratio

What is the Reserve Ratio?

The reserve ratio is the minimum percentage of the amount defined by the central bank to park aside by every commercial bank, it is a requirement that every bank must adhere to as per the regulations, and the central authority holds the right to increase or decrease this ratio as per the economic requirement.

Calculate Reserve Requirement

The simple and straightforward calculation of reserve requirement as it is directly correlated to the amount of deposits liability the bank has-

Reserve Ratio = Deposits * Reserve Requirement

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For eg:
Source: Reserve Ratio (

Example: If the European Central bankEuropean Central BankThe European Central Bank is the apex bank of the member European countries, monitoring the banking and financial functions of all member countries in order to maintain the price stability of the European currency, the more (ECB), which is the central bank for the banks operating in the eurozone, has set a reserve requirement of 8%, and a bank has deposits of 2 billion €.

So, the bank must keep 2 billion € * 8% = 160 million € as a reserve requirement.

Reserve Requirements in the USA by Federal Bank

The below snapshot illustrates the reserve requirement by the fed for commercial banksCommercial BanksA commercial bank refers to a financial institution that provides various financial solutions to the individual customers or small business clients. It facilitates bank deposits, locker service, loans, checking accounts, and different financial products like savings accounts, bank overdrafts, and certificates of more in the USA.

Reserve Requirements in the USA by Federal Bank


  • Inside limits indicated by law, the board of governors of the federal reserve has the sole authority over changes available for later necessities. In January 2019, the fed refreshed its hold necessities for storehouse establishments of various sizes.
  • Banks with more than $124.2 million in net exchange records must keep up a save of 10% of net exchange accounts.
  • Banks with more than $16.3 million to $124.2 million must save 3% of net exchange accounts.
  • Banks with net exchange records of up to $16.3 million or less don’t have a hold necessity. Most banks in the united states fall into the main class.
  • The fed set a 0% prerequisite for nonpersonal time stores and eurocurrency liabilities.

The Functioning of Reserve Ratio

Effects of Change in Reserve Ratio

The following are the effects of change in reserve ratio.

#1 – Bank Credit and Money Stock

  • Reserves are the level of cash that banks must hold for possible later use and not loan out. For instance, with a 10 percent save prerequisite on net exchange accounts, a bank that encounters a net increment of $200 million in these deposits would be required to build its necessary saves by $20 million.
  • The bank would have the option to loan the remaining $180 million of cash, bringing about an expansion in bank credit. As those assets are loaned, they make extra deposits in the financial framework.
  • The fluctuations in deposits influence the cash stock and bank credit:
    • Expanding the (reserve requirement) ratio diminishes the volume of deposits that can be supported by a given level of prerequisite and, without different activities, lessens the cash stock and raises the expense of credit.
    • Diminishing the requirement leaves banks at first with an abundance saves, which can instigate the development of bank credit and store levels and a decrease in financing costs.

#2 – Interest Rate

Importance of Reserve Ratio

The following are the importance of reserve ratio.


Reserve Ratio is a key component in the financial system and can also be used as an effective tool in balancing the monetary structure of the nation; and lastly, the central bank brings down the reserve ratio to give banks more cash to loan and lift the economy and expands the reserve proportion when it needs to decrease the cash supply and control inflation.

This article has been a guide to what is reserve ratio and its definition. Here we calculate the reserve ratio requirement along with examples, importance, and functions. You can learn more about financial analysis from the following articles –