
Central banks set reserve requirements to ensure that commercial banks have enough cash on hand to meet withdrawal demands and prevent bank runs. These requirements are used as a tool to implement monetary policy and influence the money supply by limiting or expanding lending. In some jurisdictions, such as the European Union, central banks do not require reserves to be held during the day, while others, such as the United States, have eliminated reserve requirements altogether. The COVID-19 pandemic led to a reduction in reserve requirement ratios to zero by the US Federal Reserve to stimulate the economy. Other countries, including Canada, the UK, and Australia, have no reserve requirements but must adhere to capital requirements.
| Characteristics | Values |
|---|---|
| Definition | Reserve requirements are central bank regulations that set the minimum amount that a commercial bank must hold in liquid assets. |
| Purpose | To ensure that banks have sufficient cash on hand in the event that large deposits are withdrawn. |
| Mechanism | The central bank lends funds to banks with depleted reserves. |
| Implementation | The reserve requirement is set by the central bank based on a specified proportion of deposit liabilities of the bank. |
| Frequency of Changes | In most countries, reserve requirements are not altered frequently due to potential short-term disruptive effects on financial markets. |
| Monetary Policy Tool | Increasing the reserve requirement is contractionary, while decreasing it is expansionary. |
| Countries with Reserve Requirements | Brazil, China, India, Russia. |
| Countries without Reserve Requirements | United States, Canada, United Kingdom, New Zealand, Australia, Sweden, European Union, Hong Kong. |
| Alternatives | Capital requirements, which refer to the amount of equity a bank or financial institution must hold as required by its financial regulator. |
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What You'll Learn

Reserve requirements and monetary policy
Reserve requirements are central bank regulations that set the minimum amount of liquid assets that a commercial bank must hold. This minimum amount is commonly referred to as the commercial bank's reserve and is determined by the central bank based on a specified proportion of the bank's deposit liabilities. The reserve ratio, or cash reserve ratio, is the rate at which this is calculated.
The primary purpose of reserve requirements is to ensure that banks have sufficient cash on hand to cover large withdrawals and prevent bank runs. Banks are generally not permitted to lend this money; it must be kept in reserve. If a bank's reserves fall below the requirement, it can borrow from other banks or from the central bank.
Central banks can use changes in reserve requirements as a tool for implementing monetary policy. By reducing the reserve requirement, a central bank can increase liquidity in the financial system and encourage lending, which is an expansionary monetary policy. Conversely, raising the reserve requirement reduces liquidity and cools down the economy, which is a contractionary monetary policy.
However, changes in reserve requirements can have disruptive short-term effects on financial markets, so central banks generally prefer to use other monetary policy instruments. Additionally, some jurisdictions, such as the European Union and several countries like Canada, the UK, and the United States, have eliminated reserve requirements altogether. Instead, they may impose capital requirements, which refer to the amount of equity a bank or financial institution must hold as required by its financial regulator.
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Reserve ratios
The reserve ratio is a critical tool for maintaining economic stability. By reducing the reserve ratio, the central bank increases the money supply in the economy, making borrowing more attractive to customers as banks can lend at lower interest rates. Conversely, raising the reserve ratio reduces the money supply, slowing down the economy and causing interest rates to rise.
The Federal Reserve Board’s Regulation D sets uniform reserve requirements for all institutions with transaction accounts. Banks must regularly report to the Federal Reserve and are required to hold reserves as cash in vaults or as Federal Reserve Bank deposits.
In response to the COVID-19 pandemic, the Federal Reserve reduced the reserve requirement ratio to zero across all deposit tiers, effective March 26, 2020. This action eliminated reserve requirements for all depository institutions. Prior to this change, reserve requirement ratios on net transaction accounts differed based on the amount of net transaction accounts at the depository institution.
Some countries, including Canada, the United Kingdom, New Zealand, Australia, Sweden, and Hong Kong, do not have reserve requirements. Instead, they may adhere to capital requirements, which dictate the amount of equity a bank or financial institution must hold as required by its financial regulator.
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Central bank intervention
Central banks are responsible for providing their nations with a safe, flexible, and stable monetary and financial system. One of the tools at their disposal to achieve this is setting reserve requirements. These are the minimum amounts that commercial banks must hold in liquid assets, typically a specified proportion of deposit liabilities. The purpose of reserve requirements is to ensure that banks have enough cash on hand to cover customer withdrawals and prevent bank runs.
Central banks in some jurisdictions, such as the European Union, do not require reserves to be held during the day. Other countries, like Canada, the UK, New Zealand, Australia, Sweden, and Hong Kong, have no reserve requirements at all. Instead, they rely on capital requirements, which dictate the amount of equity a bank or financial institution must hold as required by its financial regulator.
The Federal Reserve, the central bank of the United States, had the authority to establish reserve requirements for depository institutions. However, in March 2020, in response to the COVID-19 pandemic, the Federal Reserve reduced the reserve requirement ratio to zero across all deposit tiers. This action was intended to stimulate the economy by allowing banks to use additional liquidity to lend to individuals and businesses.
Prior to this change, the Federal Reserve had used reserve requirements as a tool to control liquidity in the financial system and influence interest rates. By reducing the reserve requirement, the Fed encouraged expansionary monetary policy, while increasing it led to a contractionary monetary policy.
In summary, central bank intervention in setting reserve requirements is a critical aspect of maintaining financial stability and influencing monetary policy. While not all jurisdictions impose reserve requirements, those that do use them as a tool to manage liquidity and control interest rates.
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Constraints on banks
Reserve requirements are central bank regulations that set the minimum amount that a commercial bank must hold in liquid assets. This minimum amount is commonly referred to as the commercial bank's reserve and is determined by the central bank based on a specified proportion of the bank's deposit liabilities. The reserve ratio is used as a tool by a country's monetary authority to influence the money supply by limiting or expanding the amount of lending by banks.
While reserve requirements are used by most central banks, some jurisdictions, such as the European Union, do not require reserves to be held during the day. Additionally, countries like Canada, the UK, New Zealand, Australia, Sweden, and Hong Kong have no reserve requirements. Instead, they may adhere to capital requirements, which refer to the amount of equity a bank or financial institution must hold as required by its financial regulator.
In the United States, the Federal Reserve Board has the authority to establish reserve requirements for certain types of deposits and other liabilities of depository institutions. These requirements ensure that banks have sufficient cash on hand to cover withdrawals and prevent bank runs. However, in response to the COVID-19 pandemic, the Federal Reserve reduced the reserve requirement ratio to zero across all deposit tiers, effective March 26, 2020, to stimulate the economy by allowing banks to lend more to individuals and businesses.
The reserve requirement is a tool used by central banks to control liquidity in the financial system. By reducing the reserve requirement, the central bank executes an expansionary monetary policy, while increasing it leads to a contractionary monetary policy. Changes in reserve requirements can impact interest rates, with higher requirements leading to higher interest rates and vice versa.
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International differences in reserve requirements
Reserve requirements are central bank regulations that set the minimum amount that a commercial bank must hold in liquid assets. This minimum amount is commonly referred to as the commercial bank's reserve and is determined by the central bank based on a specified proportion of the bank's deposit liabilities. While most central banks use reserve requirements as a mechanism to ensure that banks have sufficient cash on hand in case of large withdrawals, there are international differences in the implementation of these requirements.
Some jurisdictions, such as the European Union, do not mandate that reserves be held during the day. On the other hand, countries like the United States have eliminated reserve requirements altogether. As of March 26, 2020, the Federal Reserve reduced the reserve requirement ratio to zero across all deposit tiers, removing reserve requirements for all depository institutions. This decision was made in response to the COVID-19 pandemic to stimulate the economy by allowing banks to lend more to individuals and businesses.
Canada, the United Kingdom, New Zealand, Australia, Sweden, and Hong Kong have also eliminated reserve requirements. Instead, these countries may have capital requirements, which dictate the amount of equity a bank or financial institution must hold as mandated by its financial regulator.
In contrast, other countries actively adjust their reserve requirements for various purposes. The People's Bank of China, for example, has used changes in reserve requirements as an inflation-fighting tool, raising them multiple times in recent years. Similarly, the Reserve Bank of India altered its cash reserve ratio (CRR) to manage liquidity during the 2008 financial crisis.
While reserve requirements can be a tool for a country's monetary policy, they are not frequently altered due to their potential disruptive effects on financial markets. Central banks must carefully consider any changes to avoid liquidity problems for banks with low excess reserves.
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Frequently asked questions
Yes, central banks have reserve requirements. These are the minimum amounts that commercial banks must hold in liquid assets to ensure they have enough cash on hand in the event of large withdrawals.
No, reserve requirements vary across different central banks. For example, the central bank in the European Union does not require reserves to be held during the day, while the central bank in the United States eliminated reserve requirements in 2020.
Reserve requirements are used as a tool to control liquidity in the financial system and influence the money supply by limiting or expanding lending by banks. They also help maintain public confidence in the banking system.


















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