2. Effective April 2, 1992, the 12 percent required reserve ratio against net transaction deposits above the low reserve tranche level was reduced to 10 percent. The lag between the end of a quarterly reporting period and the first day of the maintenance period associated with this computation period will depend on whether the fourth or the fifth Thursday following the end of a quarterly reporting period coincides with the first day of a 14-day maintenance period.The interval of maintenance periods associated with a computation period will begin on the fourth Thursday following the end of each quarterly reporting period if that Thursday is the first day of a 14-day maintenance period. This amount is referred to as the low reserve tranche. Net transaction accounts above the low reserve tranche are subject to a higher rate, currently 10 percent. Net transaction account balances above the low reserve tranche were subject to a reserve requirement ratio of 10 percent. Vault cash/drawer cash is just what the name says, cash held by banks on the premises. For weekly reporters, the reserve maintenance period starts 17 days after the end of a reserve computation period.Quarterly reporters are those institutions that submit the FR 2900 report to the Federal Reserve one week each calendar quarter, in March, June, September, and December. The Federal Reserve uses data reported on the FR 2900 to compute an institution's net transaction accounts for a particular computation period, and then calculates a reserve requirement by applying the reserve ratios noted in Table 3.1.An institution's reservable liabilities up to a specified amount--the exemption amount--are subject to a reserve requirement of zero percent. The following content explains the Board’s authority to impose reserve requirements and how reserve requirements were administered prior to the change in reserve requirement ratios to zero.The Federal Reserve Act authorizes the Board to establish reserve requirements within specified ranges for purposes of implementing monetary policy on certain types of deposits and other liabilities of depository institutions.The dollar amount of a depository institution's reserve requirement is determined by applying the reserve requirement ratios specified in the Board's Regulation D (Reserve Requirements of Depository Institutions, 12 CFR Part 204) to an institution's reservable liabilities (see table of Prior to the change effective March 26, 2020, reserve requirement ratios on net transactions accounts differed based on the amount of net transactions accounts at the depository institution.
The amount of net transaction accounts subject to a reserve requirement ratio of zero percent or the "exemption amount." The reserve requirement exemption amount and the low reserve tranche are indexed each year pursuant to formulas specified in the Federal Reserve Act (see table of For more history on the changes in reserve requirement ratios and the indexation of the exemption and low reserve tranche, see the Notes: The Board's Regulation D (Reserve Requirements of Depository Institutions) provides that reserve requirements must be satisfied by holding vault cash and, if vault cash is insufficient, by maintaining a balance in an account at a Federal Reserve Bank. If the fourth Thursday following the end of a quarterly reporting period is not the first day of a 14-day maintenance period, then the interval will begin on the fifth Thursday following the end of the quarterly reporting period. If a commercial bank has $2 million cash in its vault $1 million in government securities $3 million on deposit at the Fed and $60 million in checkable deposits then its excess reserves equal: Since December 27, 1990, reserve requirements have only been assessed on net transaction accounts, since nonpersonal time deposits and eurocurrency liabilities have had a reserve ratio of zero ( 1. Net transaction accounts are total transaction accounts less amounts due from other depository institutions and less cash items in the process of collection. Reserve requirements are calculated by applying reserve ratios specified in Regulation D to an institution's reservable liabilities (See Reserve Ratios) as reported on the Report of Transaction Accounts, Other Deposits and Vault Cash (FR 2900) during the reserve computation period.

November 20, 2019
The worksheets are organized as follows:The data used in the worksheets should be rounded to the nearest thousand, with the exception of the reserve ratios.The length of a reserve computation period depends on the frequency with which an institution files the FR 2900 report of deposits, either weekly or quarterly. The length of a reserve computation period depends on the frequency with which an institution reports an FR 2900 report. March 20, 2020 Reserve requirements are imposed on "depository institutions," defined as commercial banks, savings banks, savings and loan associations, credit unions, U.S. branches and agencies of foreign banks, Edge corporations, and agreement corporations.The following list covers regulatory changes in reserve requirements and indexation of the low reserve tranche and the reserve requirement exemption beginning December 1, 1959, and their effects on required reserves.106. Reservable liabilities consist of net transaction accounts, nonpersonal time deposits, and eurocurrency liabilities. Reserve requirements are calculated by applying reserve ratios specified in Regulation D to an institution's reservable liabilities (See The Federal Reserve calculates and provides reserve balance requirements before the start of each maintenance period to depository institutions via the Reserves Central--Reserve Account Administration, which is available on the The dollar amount of a depository institution's reserve requirement is determined by applying the reserve ratios specified in the Federal Reserve Board's Regulation D to an institution's reservable liabilities.

It means that the fraction of vault cash a bank has cannot be greater than the fraction of bank deposits (it has) at the Federal Reserve.