Standing Deposit Facility (SDF)

The Standing Deposit Facility (SDF) is an uncollateralised liquidity-absorption tool operated by the Reserve Bank of India (RBI) under which scheduled commercial banks park surplus funds with the central bank overnight and earn a fixed rate of interest. Its legal foundation was created by the Finance Act, 2018, which amended the Reserve Bank of India Act, 1934 to insert a new sub-section in Section 17 empowering the RBI to accept deposits from banks without the obligation to issue collateral in the form of government securities. Although Parliament conferred the authority in 2018, the facility lay dormant until the RBI Monetary Policy Committee operationalised it on 8 April 2022, citing the need for a more robust instrument to mop up the extraordinary liquidity overhang accumulated during the COVID-19 pandemic. The SDF thus became the newest pillar of the central bank's Liquidity Adjustment Facility (LAF) corridor.

The procedural mechanics are deliberately simple, which is the source of the instrument's appeal. A bank holding excess reserves at the end of the day places funds with the RBI through the e-Kuber platform; the deposit is overnight, settles automatically, and is remunerated at the SDF rate. Unlike a repurchase transaction, the RBI does not transfer any security to the depositing bank as a leg of the operation. The SDF rate is positioned 25 basis points below the repo rate, and it constitutes the floor of the LAF corridor. The ceiling is set by the Marginal Standing Facility (MSF) rate, fixed 25 basis points above the repo rate. The width of the corridor is therefore 50 basis points, symmetrically arranged around the policy repo rate, with the SDF at the bottom and the MSF at the top.

The defining feature that distinguishes the SDF from earlier absorption tools is the absence of collateral. Under the previous arrangement, when the RBI wished to drain liquidity it conducted reverse repo operations, handing over government securities from its own portfolio to the banks supplying funds. Because the RBI's stock of eligible securities is finite, the volume of liquidity it could absorb was constrained by its balance sheet. The SDF removes this ceiling entirely: the central bank can sterilise any quantum of surplus liquidity because it issues no securities and merely records a deposit liability. This makes the SDF particularly valuable in periods of large structural surplus, and it is available to banks on demand throughout the day, including the option of placing funds during the regular LAF window or under separate intra-day arrangements the RBI may notify.

In contemporary practice the SDF rate moves in lockstep with the repo rate decided by the six-member Monetary Policy Committee in Mumbai. When the MPC raised the repo rate to 6.50 percent in February 2023, the SDF rate was correspondingly placed at 6.25 percent, with the MSF and Bank Rate at 6.75 percent. RBI Governors Shaktikanta Das and later Sanjay Malhotra have repeatedly framed the SDF as the operative floor against which short-term money-market rates such as the weighted average call rate are anchored. The Department of Economic and Policy Research and the Financial Markets Operations Department within the RBI publish daily money-market operation data showing the quantum absorbed under the SDF, which during the surplus-liquidity phase of 2022–23 frequently ran into trillions of rupees.

The SDF must be distinguished carefully from the instruments it sits beside. It replaced the fixed-rate reverse repo as the floor of the corridor; the reverse repo was not abolished but rendered largely dormant, retained by the RBI as a discretionary tool for fine-tuning. The MSF, by contrast, is a lending facility through which banks borrow overnight from the RBI against securities, including a permitted dip into the Statutory Liquidity Ratio holdings, and it forms the ceiling. The repo rate remains the single signalling rate set by the MPC. A frequent point of confusion concerns the Cash Reserve Ratio: the CRR is a mandatory, unremunerated reserve banks must maintain, whereas the SDF is a voluntary, remunerated overnight deposit chosen by the bank when it has surplus funds.

Controversy and debate around the SDF have centred on its interaction with the corridor's symmetry and on financial-stability questions. Because the SDF is uncollateralised, some analysts noted that funds parked under it leave the depositing bank without a security in hand, a non-issue for solvency but relevant for collateral availability in stressed conditions. The RBI has also retained flexibility over corridor width; in earlier emergency phases the corridor had been widened asymmetrically, and the restoration to a symmetric 50-basis-point band in April 2022 was itself a normalisation step. More recently the central bank has experimented with variable rate reverse repo (VRRR) auctions alongside the SDF to manage frictional liquidity, signalling that the SDF is the standing floor while VRRR handles transient surplus through market-determined rates.

For the working practitioner—whether a UPSC aspirant preparing General Studies Paper III, a money-market dealer, or a policy analyst—the SDF is essential to understanding how the RBI transmits its policy stance. The SDF rate, not the repo rate alone, often determines where overnight money actually trades when the banking system is flush with liquidity, because banks will not lend below the rate they can earn risk-free at the central bank. Mastery of the corridor architecture—SDF floor, repo signal, MSF ceiling—is indispensable for interpreting RBI policy statements, anticipating short-term interest-rate movements, and explaining the mechanics of monetary transmission in the Indian economy.