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Interest on Reserve Balances (IORB) is an interest-rate tool adopted by the Federal Reserve on July 29, 2021.

2026-08-11·x-repost-20260811-162545

Interest on Reserve Balances (IORB) is an interest-rate tool adopted by the Federal Reserve on July 29, 2021. It replaced the Interest on Required Reserves (IORR) and Interest on Excess Reserves (IOER). IORB became the upper bound of the interest-rate corridor the Federal Reserve sets for financial institutions.

The lower bound of the corridor is determined by the overnight reverse repurchase agreement rate. IORB is the interest rate the Federal Reserve pays financial institutions on the reserves they hold at the Federal Reserve. Through this tool, the Fed can better manage the liquidity of U.S. dollars in the market.

Before 2008, the Federal Reserve did not pay interest on reserves that banks held at the Fed. During the 2008 subprime mortgage crisis, however, the Federal Reserve and the U.S. government recognized the importance of maintaining sufficient dollar reserves so that adequate liquidity support could be provided to the banking system when needed.

To encourage banks to hold sufficient dollar reserves, Congress authorized the Federal Reserve in 2008 to pay interest on deposits that banks held at the Fed, thereby increasing the amount of deposits held by banks at the Federal Reserve.

At the same time, the Federal Reserve could use adjustments to the interest rate on reserve balances to more conveniently influence the effective federal funds rate. The federal funds rate is the Fed’s primary tool for fulfilling its mandates of controlling prices and promoting employment.

As a result, the interest rate on reserve balances has become one of the important tools the Fed uses to carry out its functions. ## Why Is the Interest on Reserve Balances Important? The predecessor rates to IORB were the Interest Rate on Required Reserves (IORR) and the Interest Rate on Excess Reserves (IOER).

The Federal Reserve sets the reserve interest rate to better manage the circulation of money in the market, implement monetary policy more effectively, and fulfill its responsibilities for controlling prices, promoting employment, and influencing longer-term interest rates.

If the Federal Open Market Committee (FOMC) believes that the economy is overheating and inflationary pressures are increasing, the Federal Reserve may sell government bonds through open market operations (OMO) and raise the reserve interest rate to reduce dollar liquidity. This would reduce the liquidity available for banks to transact with one another.

Similarly, if the FOMC believes that economic growth is too slow or that deflationary pressures are emerging, the Federal Reserve may purchase government bonds through OMO and lower the reserve interest rate to increase liquidity in the United States. Banks would then have more excess dollar liquidity available for transactions.

The federal funds rate is the most important short-term interest rate influencing other rates in the economy. The interest rate on reserve balances is one of the important tools the Federal Reserve uses to influence the federal funds rate.

When the Federal Reserve raises the interest rate on reserve balances, banks have a greater incentive to hold more reserves at the Fed and earn interest. This reduces the amount of dollars circulating in the market.

When the Fed lowers the rate, banks may reduce the amount of reserves they hold at the Federal Reserve and lend those funds to other institutions, businesses, or individuals, increasing the amount of dollars circulating in the market. Before the 2008 subprime mortgage crisis, the Federal Reserve did not pay interest on reserves that banks held at the Fed.

Beginning on October 6, 2008, the Federal Reserve began paying interest on reserve balances held by banks and depository institutions to better maintain the amount of cash held in Federal Reserve accounts.

By setting the interest rate on reserve balances, the Federal Reserve can more easily withdraw liquidity from the market and then provide an appropriate amount of liquidity by purchasing Treasury securities or mortgage-backed securities, rather than simply increasing liquidity within the banking system.

The latter could lead to excessive monetary growth and excessive inflation. After emerging from a crisis, the Federal Reserve can better control excess reserve levels when it ends monetary stimulus, helping to avoid severe market volatility and allowing markets to transition more smoothly toward normalization.

## How does the Federal Reserve use IORB to control the upper limit of interest rates? The interest rate on reserve balances is the rate banks can earn when they deposit funds with the Federal Reserve. The federal funds rate is the rate banks can earn when they lend funds to other banks.

Currently, the Federal Reserve sets the interest rate on reserve balances at the upper limit of the federal funds rate corridor because: The federal funds rate adjusts according to the demand for interbank lending. When demand for interbank loans increases, the federal funds rate rises. Conversely, when demand decreases, the federal funds rate falls.

The Federal Reserve therefore adjusts IORB to influence demand for borrowing and regulate the federal funds rate: - When the Federal Reserve raises IORB, banks have an incentive to borrow from other banks and deposit the funds with the Federal Reserve to earn the interest-rate spread between IORB and the federal funds rate.

As demand for interbank borrowing increases, the federal funds rate rises. - When the Federal Reserve lowers IORB, banks lose the incentive to borrow from other banks and deposit the funds with the Federal Reserve. As demand for interbank borrowing decreases, the federal funds rate falls.

This shows that IORB currently serves as the upper limit in the Federal Reserve’s interest-rate corridor for the banking sector. ## How can you look up the interest rate on reserve balances? Because IORB was introduced on July 29, 2021, historical data is currently available only from that date onward. You can find historical IORB data through the St.

Louis Fed. As of December 25, 2024, the IORB rate was 4.40%. Interest Rate on Reserve Balances (IORB) [Source] Users who want to view the former rates for required reserves and excess reserves can also visit the relevant portals, although those datasets stopped being updated in July 2021.

Interest on Required Reserves (IORR) [Source] Interest on Excess Reserves (IOER) [Source] ## How did the interest rate on reserve balances come about? In 2006, Congress authorized the Federal Reserve under the Financial Services Regulatory Relief Act to pay interest on certain categories of reserve deposits.

The authorization was scheduled to take effect on October 1, 2011 [Source]. However, the subprime mortgage crisis in the United States triggered a large-scale financial crisis in 2008. As a result, the payment of interest on reserves was implemented ahead of schedule.

Beginning on October 6, 2008, the Federal Reserve introduced the interest rate on required reserves (IORR) and the interest rate on excess reserves (IOER). Thus, starting in 2008, the United States began paying banks interest on reserves held at the Federal Reserve.

IORR was the interest rate banks could earn by depositing their required reserves with the Federal Reserve. IOER was the interest rate banks could earn by depositing funds in excess of their required reserves with the Federal Reserve. Initially, the IORR rate was higher than the IOER rate.

However, beginning in January 2009, the two rates were generally the same. It is important to note that, before March 24, 2020, the Federal Reserve required banks to maintain a reserve ratio. The reserve ratio was the proportion of a bank’s total deposits held as cash in its vaults or at the Federal Reserve.

Beginning on March 24, 2020, however, the Federal Reserve reduced the reserve requirement ratio to zero. Because banks were no longer required to hold reserves, there was no longer any practical reason to distinguish between IORR and IOER.

Therefore, beginning on July 29, 2021, the Federal Reserve introduced the interest rate on reserve balances (IORB), replacing the former IORR and IOER rates. ## More on Macroeconomics - What Is the Federal Reserve’s Balance Sheet? - An Overview of the Federal Reserve’s 24 Primary Dealers - What Is the National Financial Conditions Index?

Published by the Federal Reserve Bank of Chicago - What Is the Buffett Indicator? - What Is the U.S. Treasury Volatility Index? The MOVE Index What is the US Dollar Index? What are bank reserves? What are open market operations? What is the Personal Consumption Expenditures (PCE) Price Index?

Full text

Interest on Reserve Balances (IORB) is an interest-rate tool adopted by the Federal Reserve on July 29, 2021.

**Interest on Reserve Balances (IORB)** is an interest-rate tool adopted by the Federal Reserve on July 29, 2021. It replaced the Interest on Required Reserves (IORR) and Interest on Excess Reserves (IOER). IORB became the upper bound of the interest-rate corridor the Federal Reserve sets for financial institutions. The lower bound of the corridor is determined by the overnight reverse repurchase agreement rate. IORB is the interest rate the Federal Reserve pays financial institutions on the reserves they hold at the Federal Reserve. Through this tool, the Fed can better manage the liquidity of U.S. dollars in the market. Before 2008, the Federal Reserve did not pay interest on reserves that banks held at the Fed. During the 2008 subprime mortgage crisis, however, the Federal Reserve and the U.S. government recognized the importance of maintaining sufficient dollar reserves so that adequate liquidity support could be provided to the banking system when needed. To encourage banks to hold sufficient dollar reserves, Congress authorized the Federal Reserve in 2008 to pay interest on deposits that banks held at the Fed, thereby increasing the amount of deposits held by banks at the Federal Reserve. At the same time, the Federal Reserve could use adjustments to the interest rate on reserve balances to more conveniently influence the effective federal funds rate. The federal funds rate is the Fed’s primary tool for fulfilling its mandates of controlling prices and promoting employment. As a result, the interest rate on reserve balances has become one of the important tools the Fed uses to carry out its functions. ## Why Is the Interest on Reserve Balances Important? The predecessor rates to IORB were the Interest Rate on Required Reserves (IORR) and the Interest Rate on Excess Reserves (IOER). The Federal Reserve sets the reserve interest rate to better manage the circulation of money in the market, implement monetary policy more effectively, and fulfill its responsibilities for controlling prices, promoting employment, and influencing longer-term interest rates. If the Federal Open Market Committee (FOMC) believes that the economy is overheating and inflationary pressures are increasing, the Federal Reserve may sell government bonds through open market operations (OMO) and raise the reserve interest rate to reduce dollar liquidity. This would reduce the liquidity available for banks to transact with one another. Similarly, if the FOMC believes that economic growth is too slow or that deflationary pressures are emerging, the Federal Reserve may purchase government bonds through OMO and lower the reserve interest rate to increase liquidity in the United States. Banks would then have more excess dollar liquidity available for transactions. The federal funds rate is the most important short-term interest rate influencing other rates in the economy. The interest rate on reserve balances is one of the important tools the Federal Reserve uses to influence the federal funds rate. When the Federal Reserve raises the interest rate on reserve balances, banks have a greater incentive to hold more reserves at the Fed and earn interest. This reduces the amount of dollars circulating in the market. When the Fed lowers the rate, banks may reduce the amount of reserves they hold at the Federal Reserve and lend those funds to other institutions, businesses, or individuals, increasing the amount of dollars circulating in the market. Before the 2008 subprime mortgage crisis, the Federal Reserve did not pay interest on reserves that banks held at the Fed. Beginning on October 6, 2008, the Federal Reserve began paying interest on reserve balances held by banks and depository institutions to better maintain the amount of cash held in Federal Reserve accounts. By setting the interest rate on reserve balances, the Federal Reserve can more easily withdraw liquidity from the market and then provide an appropriate amount of liquidity by purchasing Treasury securities or mortgage-backed securities, rather than simply increasing liquidity within the banking system. The latter could lead to excessive monetary growth and excessive inflation. After emerging from a crisis, the Federal Reserve can better control excess reserve levels when it ends monetary stimulus, helping to avoid severe market volatility and allowing markets to transition more smoothly toward normalization. ## How does the Federal Reserve use IORB to control the upper limit of interest rates? The interest rate on reserve balances is the rate banks can earn when they deposit funds with the Federal Reserve. The federal funds rate is the rate banks can earn when they lend funds to other banks. Currently, the Federal Reserve sets the interest rate on reserve balances at the upper limit of the federal funds rate corridor because: The federal funds rate adjusts according to the demand for interbank lending. When demand for interbank loans increases, the federal funds rate rises. Conversely, when demand decreases, the federal funds rate falls. The Federal Reserve therefore adjusts IORB to influence demand for borrowing and regulate the federal funds rate: - When the Federal Reserve raises IORB, banks have an incentive to borrow from other banks and deposit the funds with the Federal Reserve to earn the interest-rate spread between IORB and the federal funds rate. As demand for interbank borrowing increases, the federal funds rate rises. - When the Federal Reserve lowers IORB, banks lose the incentive to borrow from other banks and deposit the funds with the Federal Reserve. As demand for interbank borrowing decreases, the federal funds rate falls. This shows that IORB currently serves as the upper limit in the Federal Reserve’s interest-rate corridor for the banking sector. ## How can you look up the interest rate on reserve balances? Because IORB was introduced on July 29, 2021, historical data is currently available only from that date onward. You can find historical IORB data through the St. Louis Fed. As of December 25, 2024, the IORB rate was 4.40%. **Interest Rate on Reserve Balances (IORB) [Source]** Users who want to view the former rates for required reserves and excess reserves can also visit the relevant portals, although those datasets stopped being updated in July 2021. **Interest on Required Reserves (IORR) [Source]** **Interest on Excess Reserves (IOER) [Source]** ## How did the interest rate on reserve balances come about? In 2006, Congress authorized the Federal Reserve under the **Financial Services Regulatory Relief Act** to pay interest on certain categories of reserve deposits. The authorization was scheduled to take effect on October 1, 2011 [Source]. However, the subprime mortgage crisis in the United States triggered a large-scale financial crisis in 2008. As a result, the payment of interest on reserves was implemented ahead of schedule. Beginning on October 6, 2008, the Federal Reserve introduced the interest rate on required reserves (IORR) and the interest rate on excess reserves (IOER). Thus, starting in 2008, the United States began paying banks interest on reserves held at the Federal Reserve. IORR was the interest rate banks could earn by depositing their required reserves with the Federal Reserve. IOER was the interest rate banks could earn by depositing funds in excess of their required reserves with the Federal Reserve. Initially, the IORR rate was higher than the IOER rate. However, beginning in January 2009, the two rates were generally the same. It is important to note that, before March 24, 2020, the Federal Reserve required banks to maintain a reserve ratio. The reserve ratio was the proportion of a bank’s total deposits held as cash in its vaults or at the Federal Reserve. Beginning on March 24, 2020, however, the Federal Reserve reduced the reserve requirement ratio to zero. Because banks were no longer required to hold reserves, there was no longer any practical reason to distinguish between IORR and IOER. Therefore, beginning on July 29, 2021, the Federal Reserve introduced the interest rate on reserve balances (IORB), replacing the former IORR and IOER rates. ## More on Macroeconomics - What Is the Federal Reserve’s Balance Sheet? - An Overview of the Federal Reserve’s 24 Primary Dealers - What Is the National Financial Conditions Index? Published by the Federal Reserve Bank of Chicago - What Is the Buffett Indicator? - What Is the U.S. Treasury Volatility Index? The MOVE Index What is the US Dollar Index? What are bank reserves? What are open market operations? What is the Personal Consumption Expenditures (PCE) Price Index?

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