4 min Read Feb 21, 2022
The deposit multiplier — also referred to as the money multiplier — is the maximum amount of commercial bank money (deposits) that can be created in the banking system from a given unit of central bank reserves, based on the reserve requirement ratio set by the central bank. It is calculated as: Deposit Multiplier = 1 ÷ Reserve Requirement Ratio. For example, if the Reserve Bank of India mandates a Cash Reserve Ratio (CRR) of 4%, the theoretical deposit multiplier is 25 — meaning every ₹1 of base money held as reserves can theoretically support up to ₹25 in bank deposits through the process of fractional reserve banking and successive rounds of lending and re-depositing. In practice, the actual money multiplier is lower than the theoretical maximum due to cash leakages and excess reserves held by banks. For investors and analysts on Ventura Securities tracking banking sector credit growth, monetary policy transmission, and RBI's liquidity management operations, the deposit multiplier is a foundational concept for understanding how changes in CRR or open market operations by the RBI ripple through the banking system to influence overall money supply and credit availability.
