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Money Multiplier Formula

By Madhuri ThakurMadhuri Thakur

Money Multiplier Formula

Money Multiplier Formula (Table of Contents)

  • Formula
  • Examples
  • Calculator

What is the Money Multiplier Formula?

The term “money multiplier” refers to the phenomenon of credit creation due to the fractional reserve banking system under which a bank is required to hold a certain amount of the deposits in its reserves in order to be able to meet any potential withdrawal demand. So, it means that a bank has to hold a fraction of all the deposits as reserves, while it can extend the remaining as loans to create more money in the economy. The mandatory reserve maintained by the bank divided by the total deposits received by the bank is known as the required reserve ratio. The formula for money multiplier is simple and it can be derived by dividing one by the required reserve ratio. Mathematically, it is represented as,

Money Multiplier = 1 / Required Reserve Ratio

Examples of Money Multiplier Formula (With Excel Template)

Let’s take an example to understand the calculation of the Money Multiplier in a better manner.

You can download this Money Multiplier Formula Excel Template here – Money Multiplier Formula Excel Template

Money Multiplier Formula – Example #1

Let us take a simple example of a bank with the required reserve ratio of 25%. Calculate the money multiplier of the economy.

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Money Multiplier Formula-1.1

Solution:

Money Multiplier is calculated using the formula given below

Money Multiplier = 1 / Required Reserve Ratio

Money Multiplier Formula-1.2

  • Money Multiplier  = 1 / 25%
  • Money Multiplier = 4

Therefore, the money multiplier of the economy is 4.

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Money Multiplier Formula – Example #2

Let us take the example of a country where the central bank has mandated the commercial banks to maintain a reserve equivalent to 20% of their deposits. Calculate the money multiplier and the total money supply in the economy if the total deposits are $20 million.

Money Multiplier Formula-2.1

Solution:

Money Multiplier is calculated using the formula given below

Money Multiplier = 1 / Required Reserve Ratio

Money Multiplier Formula-2.2

  • Money Multiplier = 1 / 20%
  • Money Multiplier = 5

Total Money Supply is calculated using the formula given below

Total Money Supply = Money Multiplier * Total Deposits

Money Multiplier Formula-2.3

  • Total Money Supply = 5 * $20 million
  • Total Money Supply = $100 million

Therefore, the money multiplier is 5 while the total money supply in the economy is $100 million.

Money Multiplier Formula – Example #3

Let us take another example of a bank SDF Bank Ltd to understand the concept of the money multiplier. Last year, the bank collected total deposits worth $30 million, out of which the bank extended $27 million in the form of different types of loans. Based on the given information, Calculate the following:

  1. Money Maintained in Reserve
  2. Required Reserved Ratio
  3. Money Multiplier
  4. Total Money Supply in the Economy

Example of SDF Bank Ltd

Solution:

Reserve Amount is calculated using the formula given below

Reserve Amount = Total Deposit – Loan Extended

Calculation of Reserve Amount 

  • Reserve Amount = $30 million – $27 million
  • Reserve Amount = $3 million

Therefore, the money maintained in the reserve is $3 million.

Required Reserve Ratio is calculated using the formula given below

Required Reserve Ratio = Reserve Amount  / Total Deposit

Calculation of Required Reserve Ratio

  • Required Reserve Ratio = $3 million / $30 million
  • Required Reserve Ratio = 10%

Therefore, the Required Reserved Ratio is 10%.

Money Multiplier is calculated using the formula given below

Money Multiplier = 1 / Required Reserve Ratio

Calculation of Money Multiplier Formula

  • Money Multiplier = 1 / 10%
  • Money Multiplier = 10

Therefore, the Money Multiplier of the Economy is 10.

Total Money Supply is calculated using the formula given below

Total Money Supply = Money Multiplier * Total Deposits

Calculation of Total Money Supply

  • Total Money Supply = 10 * $30 million
  • Total Money Supply = $300 million

Therefore, the total money supply in the economy due to SDF Bank Ltd is $300 million.

Explanation

The formula for money multiplier can be determined by using the following steps:

Step 1: Firstly, determine the number of deposits received by the bank in the form of the current account, savings account, recurring account, fixed deposit, etc.

Step 2: Next, determine the number of loans extended to the borrowers. It is the aggregate of all the types of lending, such as term loan, short term loan, overdraft facility, etc.

Step 3: Next, calculate the amount of deposit maintained in the reserve by deducting the total amount of loans extended (step 2) from the total amount of deposits received (step 1) as shown below.

Reserve Amount = Total Deposit – Loan Extended

Step 4: Next, calculate the required reserve ratio by dividing the fraction of deposit maintained in the reserve (step 3) by the total amount of deposits received (step 1) by the bank as shown below.

Required Reserve Ratio = Reserve Amount / Total Deposit

Step 5: Finally, the formula for the money multiplier can be calculated by dividing one by the required reserve ratio (step 4) as shown below.

Money Multiplier = 1 / Required Reserve Ratio

Relevance and Use of Money Multiplier Formula

From the perspective of banking economics, the money multiplier is a very important concept as it is a key element of the fractional banking system that controls the money supply in an economy. In fact, the money multiplier defines the amount of money that the banking system generates with each dollar of reserves. Theoretically, the higher the reserve requirement, the lower the amount of money that the banking system can use to extend loans resulting in lesser money in circulation. As such, the money multiplier is inversely proportional to the reserve ratio.

Money Multiplier Formula Calculator

You can use the following Money Multiplier Formula Calculator

Required Reserve Ratio
Money Multiplier
 

Money Multiplier =
1 =
Required Reserve Ratio
1 = 0
0

Recommended Articles

This is a guide to Money Multiplier Formula. Here we discuss how to calculate Money Multiplier Formula along with practical examples. We also provide a Money Multiplier calculator with a downloadable excel template. You may also look at the following articles to learn more –

  1. Time Value of Money Formula
  2. How to Calculate the Nominal Interest Rate?
  3. Examples of Interest Expense (Excel Template)
  4. How to Calculate Monthly Compound Interest?
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