What are 'Reserve Requirements'

Reserve requirements are the amount of cash that banks must have, in their vaults or at the closest Federal Reserve bank, in line with deposits made by their customers. Set by the Fed's board of governors, reserve requirements are one of the three main tools of monetary policy — the other two tools are open market operations and the discount rate.

BREAKING DOWN 'Reserve Requirements'

Banks loan funds to customers based on a fraction of the cash they have on hand. The government makes one requirement of them in exchange for this ability: keep a certain amount of deposits on hand to cover possible withdrawals. This amount is called the reserve requirement, and it is the rate that banks must keep in the reserve.

The Federal Reserve's Board of Governors sets the requirement as well as the interest rate banks get paid on excess reserves. The Financial Services Regulatory Relief Act of 2006 gave the Federal Reserve the right to pay interest on excess reserves. The effective date on which banks started getting paid interest was Oct. 1, 2008. This rate of interest is referred to as the interest rate on excess reserves and serves as a proxy for the federal funds rate.

Reserve Requirement Thresholds

The Garn-St Germain Depository Institutions Act of 1982 allows some banks to be exempt from the requirement rule. Currently the threshold for exemptions is set at $2 million, which means the first $2 million of reservable liabilities are not subject to reserve requirement rules. The threshold is adjusted each year as set forward by a calculation provided in the act. As of Jan. 1, 2018, banks with deposits less than $16 million have no reserve requirement. Banks with between $16 million and $122.3 million in deposits have a reserve requirement of 3%, and banks with over $122.3 million in deposits have a reserve requirement of 10%. Non-personal time deposits and eurocurrency liabilities have had a reserve ratio of zero since December 1990.

The reserve requirement is another tool that the Fed has at its disposal to control liquidity in the financial system. By reducing the reserve requirement, the Fed is executing an expansionary monetary policy, and conversely, when it raises the requirement, it's exercising a contractionary monetary policy. This action cuts liquidity and causes a cool down in the economy. 

Reserve Requirements vs. Capital Requirements

Some countries don't have reserve requirements, including Canada, the United Kingdom, New Zealand, Australia, Sweden and Hong Kong. Money can't be created without limit, but instead, some of these countries must adhere to capital requirements, which is the amount of capital a bank or financial institution must hold as required by its financial regulator

Reserve Requirement Example

As an example, assume a bank had $200 million in deposits and is required to hold 10%. The bank is now allowed to lend out $2 billion, which drastically increases bank credit. In addition to providing a buffer against bank runs and a layer of liquidity, reserve requirements are also used as a monetary tool by the Federal Reserve. By increasing the reserve requirement, the Federal Reserve is essentially taking money out of the money supply and increasing the cost of credit. Lowering the reserve requirement pumps money into the economy by giving banks excess reserves, which promotes the expansion for bank credit and lowers rates.

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