Money Multiplier

What it answers

The RBI creates only a base of money, yet the economy runs on far more than that. How does a relatively small amount of central-bank money turn into a much larger money supply? The money multiplier explains the gap. It captures how the banking system multiplies reserves into credit and deposits.

How it works

When a bank receives a deposit, it must hold a fraction in reserve and can lend out the rest. That loan becomes someone else's deposit, part of which is again lent, and so on. Through this chain of lending and re-depositing, an initial injection of reserves supports a far larger stock of deposits and credit.

Formally, the money multiplier is the ratio of broad money (M3) to reserve or base money (M0). In India M3 is essentially currency with the public plus deposits with banks, while M0 is the RBI's reserve money. A multiplier of, say, around five means each rupee of base money supports roughly five rupees of broad money.

What the RBI controls

The size of the multiplier depends partly on rules the RBI sets. The Cash Reserve Ratio (CRR) is the share of deposits banks must park with the RBI, and the Statutory Liquidity Ratio (SLR) is the share they must hold in approved liquid assets. As of late 2025 the CRR stood at 3.00% and the SLR at 18.00%. When the RBI raises CRR or SLR, banks must lock away more and can lend less, shrinking the multiplier; cutting them frees up funds and lets it expand.

The public's preference for cash over deposits also matters, since currency held outside banks does not get re-lent and dampens the multiplier.

Why it matters

The money multiplier is central to how monetary policy reaches the real economy. By adjusting reserves and reserve ratios, the RBI nudges how much credit the banking system can create, influencing growth, inflation and the cost of borrowing across the country.