EconomicsISC Class 12 · Commercial Banks and Central Bank

Credit Creation by Commercial Banks: Process, Credit Multiplier, High Powered Money and Limitations

Updated 17 October 2026 · Fact-checked

Commercial banks create credit by lending a part of the deposits they receive, keeping only a fraction as reserve. Each loan is redeposited and creates a new (derivative) deposit. With a legal reserve ratio (LRR), the maximum total deposits = initial deposit x 1/LRR, so the credit multiplier is 1/LRR. High powered money (cash reserves with banks plus currency with the public) forms the base.

Understand Credit Creation by Commercial Banks: Credit Multiplier and Limitations

1. Why banks can create credit. Banks accept deposits and lend. Experience shows that depositors do not withdraw all deposits at the same time, so banks keep only a fraction as reserves and lend the rest. Because a loan is credited to the borrower's deposit account, deposits (a part of the money supply) grow. This is credit creation (deposit creation).

2. Types of deposits. Primary deposits come from the public paying in cash (or cheques) and are the starting point. Derivative (secondary) deposits are created when a bank grants a loan and credits the borrower's account; the loan becomes a deposit in the same or another bank.

3. Legal reserve ratio (LRR) and the credit multiplier. The legal reserve ratio is the minimum fraction of deposits that banks must hold as reserves (in India through the CRR with the RBI and the SLR in liquid assets). The credit multiplier is 1 / LRR. The maximum total deposits that an initial primary deposit can support is initial deposit x credit multiplier, and the credit created is total deposits minus the initial deposit.

4. The process (example). Suppose LRR = 20% and the public deposits Rs 1,000. Bank 1 keeps Rs 200 and lends Rs 800. The Rs 800 is spent and redeposited in Bank 2, which keeps Rs 160 and lends Rs 640; Bank 3 receives Rs 640, keeps Rs 128 and lends Rs 512, and so on. Total deposits = 1,000 + 800 + 640 + 512 + ... = Rs 5,000 (= 1,000 x 1/0.2), of which Rs 4,000 is derivative deposits created by loans and Rs 1,000 is the primary deposit; total reserves are Rs 1,000.

5. High powered money (HPM). Also called the monetary base or reserve money: it consists of currency held by the public and cash reserves of commercial banks with the central bank. It is called high powered because each rupee of HPM held as reserve can support several rupees of deposits. For a given reserve ratio, a rise in HPM raises the money supply by a multiple.

6. Limitations on credit creation.

Legal reserve requirement set by the central bank (higher CRR/SLR, lower multiplier).
Cash drain: if borrowers keep part of loans as cash, less returns to banks as deposits.
Availability of sound borrowers and demand for loans: banks will not lend more than they find creditworthy borrowers for.
Banking habits: where the public prefers cash, deposits are smaller.
Central bank policy: repo rate, open market operations and selective controls change banks' ability and willingness to lend.
State of the economy: in a slump borrowers and banks are cautious; in a boom lending expands.
Banks' own safety margin: excess reserves held above the requirement reduce actual creation.

The quantitative and qualitative credit-control methods are in the next topic.

Credit Creation by Commercial Banks: Credit Multiplier and Limitations: key facts

Credit multiplier: Credit multiplier = 1 / LRR
Maximum total deposits: Total deposits = initial deposit x 1 / LRR
Credit created: Credit created = total deposits - initial deposit
Each round: Reserve = LRR x deposit; Loan = deposit - reserve

How to answer Credit Creation by Commercial Banks: Credit Multiplier and Limitations questions

Credit-creation problems depend on the initial deposit and the reserve ratio.

1Write the LRR as a fraction (20% = 0.2).
2Credit multiplier = 1/LRR.
3Maximum total deposits = initial deposit x multiplier.
4Credit created (loans, derivative deposits) = total deposits - initial deposit.
5For a round table: reserve = LRR x deposit; loan = deposit - reserve; next deposit = loan.
6If the reserve ratio rises, the multiplier and deposits fall.

Credit Creation by Commercial Banks: Credit Multiplier and Limitations in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

One deposit becomes many loans

Suppose a farmer deposits Rs 1,000 in a bank where banks must hold 20 per cent of deposits as reserves. The bank lends Rs 800 to a trader, who pays a supplier who deposits the Rs 800 in another bank, and the process repeats.

What is the total deposit the system can reach, and how much credit does it create?

Try it first, then show the solutionSolution

Credit multiplier = 1/0.2 = 5.
Total deposits = 1,000 x 5 = Rs 5,000.
Credit created = 5,000 - 1,000 = Rs 4,000.

Answer: Deposits can reach Rs 5,000, with Rs 4,000 of new loans created from the Rs 1,000 cash deposited.

Memory hook: A deposit is lent, then deposited, then lent again.

Tricks to remember Credit Creation by Commercial Banks: Credit Multiplier and Limitations

Short memory aids. Say each one aloud once, then use it on a question the same day.

Multiplier is 1 over reserve
The smaller the reserve ratio, the bigger the multiplier: 10% gives 10, 20% gives 5, 25% gives 4.
Use it when: Quick formulas.
Lend, spend, re-deposit
Each loan comes back as a new deposit: the loop is what multiplies credit.
Use it when: Explaining the process.
HPM = currency + bank reserves
Cash with the public plus cash reserves with banks.
Use it when: Definition.

Credit Creation by Commercial Banks: Credit Multiplier and Limitations: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Credit multiplier · 1 mark · MCQBoard level

If the legal reserve ratio is 10 per cent, the credit multiplier is:
(a) 0.1
(b) 1
(c) 10
(d) 100

Try it first, then show the solutionSolution

Multiplier = 1/0.10 = 10.

Answer: (c) 10

Example 2: Maximum deposits and credit · 3 marks · Short answerBoard level

The public deposits Rs 2,000 crore and the LRR is 25%. Calculate the credit multiplier, the maximum total deposits and the amount of credit created. (3 marks)

Try it first, then show the solutionSolution

Credit multiplier = 1/0.25 = 4.
Total deposits = 2,000 x 4 = Rs 8,000 crore.
Credit created = 8,000 - 2,000 = Rs 6,000 crore.

Answer: Multiplier 4; total deposits Rs 8,000 crore; credit created Rs 6,000 crore.

Example 3: Round table · 4 marks · Long answerHarder board level

With a primary deposit of Rs 1,000 and LRR of 20%, show the deposit, reserve and loan in the first four rounds and the total of each. Then find the final total deposits and credit created. (4 marks)

Try it first, then show the solutionSolution

Round 1: deposit 1,000; reserve 200; loan 800.
Round 2: deposit 800; reserve 160; loan 640.
Round 3: deposit 640; reserve 128; loan 512.
Round 4: deposit 512; reserve 102.4; loan 409.6.
Totals for four rounds: deposits 2,952; reserves 590.4; loans 2,361.6.
Final: multiplier 5, total deposits 1,000 x 5 = Rs 5,000; credit created = Rs 4,000 (total reserves = 20% x 5,000 = Rs 1,000, equal to the primary deposit).

Answer: After four rounds deposits are Rs 2,952 and loans Rs 2,361.6; in the end total deposits are Rs 5,000 and credit created is Rs 4,000, with reserves of Rs 1,000.

Example 4: Finding the reserve ratio · 4 marks · Short answerHarder board level

A primary deposit of Rs 3,000 crore leads to total deposits of Rs 12,000 crore. Find the credit multiplier, LRR and credit created. If the RBI then raises the requirement so that the LRR becomes 40%, find the new maximum deposits. (4 marks)

Try it first, then show the solutionSolution

Multiplier = 12,000/3,000 = 4; LRR = 1/4 = 25%.
Credit created = 12,000 - 3,000 = Rs 9,000 crore.
New multiplier = 1/0.40 = 2.5; maximum deposits = 3,000 x 2.5 = Rs 7,500 crore.

Answer: Multiplier 4, LRR 25%, credit created Rs 9,000 crore; with LRR at 40% deposits fall to Rs 7,500 crore.

Example 5: Base money and limits · 4 marks · Short answerHOTS / competency

Commercial banks hold Rs 600 crore of cash reserves and are required to hold 15% of deposits as reserves. (a) Find the maximum deposits the banks can support. (b) Banks actually hold a safety margin so that their effective reserve ratio is 20%. Find the actual deposits and explain the difference. (4 marks)

Try it first, then show the solutionSolution

(a) Maximum deposits = 600/0.15 = Rs 4,000 crore.
(b) Actual deposits = 600/0.20 = Rs 3,000 crore.
The difference of Rs 1,000 crore comes from banks voluntarily holding excess reserves, which is one limitation on credit creation (along with cash drain and low loan demand).

Answer: Maximum deposits are Rs 4,000 crore, but with a 20% effective reserve ratio only Rs 3,000 crore; caution by banks and limited loan demand keep actual credit creation below the legal maximum.

Where students lose marks in Credit Creation by Commercial Banks: Credit Multiplier and Limitations

The slips examiners see most often, and what to write instead.

Mistake: Using multiplier = LRR
Forgetting to invert.
Wrong working
LRR 20%: multiplier = 0.2.
Right working
Multiplier = 1/0.2 = 5.
Do this: Take the reciprocal.
Usually costs: 2 marks.
Mistake: Treating total deposits as credit created
Not subtracting the primary deposit.
Wrong working
Credit created = Rs 5,000.
Right working
Credit created = 5,000 - 1,000 = Rs 4,000.
Do this: Subtract the primary deposit.
Usually costs: 1 mark.
Mistake: Confusing primary and derivative deposits
Mixing definitions.
Wrong working
Derivative deposits are those made in cash by the public.
Right working
Primary deposits are made by the public; derivative deposits arise from the loans banks give.
Do this: Primary = deposited, derivative = derived from loans.
Usually costs: 1-2 marks.
Mistake: Listing no limitations
Process explained but not limits.
Wrong working
Banks can create unlimited credit.
Right working
Creation is limited by the reserve requirement, cash drain, loan demand and central bank policy.
Do this: Add at least three limitations.
Usually costs: 2 marks.

Exam tips

Present the process as a table: deposit, reserve, loan, for at least three rounds.
State the formula 1/LRR and the idea that the final deposit is a multiple of the initial deposit.
Define primary deposits, derivative deposits and high powered money in one line each.
Give at least three limitations of credit creation.
Mention the CRR and SLR as the Indian forms of the reserve requirement.

Practice questions on Credit Creation by Commercial Banks: Credit Multiplier and Limitations

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
If banks must hold 12.5 per cent of deposits as reserves, the credit multiplier is:
(a) 0.125
(b) 4
(c) 8
(d) 12.5
Hint
Reciprocal of 0.125.
Answer
(c) 8
Q2 · 3 marks · Short answerBoard level
Rs 5,000 crore is deposited in the banking system and the LRR is 10%. Find the credit multiplier, maximum total deposits and the credit created. (3 marks)
Hint
Multiplier = 1/LRR.
Answer
Multiplier = 10; total deposits = 5,000 x 10 = Rs 50,000 crore; credit created = 50,000 - 5,000 = Rs 45,000 crore.
Q3 · 4 marks · Short answerHarder board level
A primary deposit of Rs 4,000 is made when the LRR is 20%. Show the deposit, reserve and loan for three rounds, and find the maximum total deposits and credit created. (4 marks)
Hint
Reserve = 20% of each deposit.
Answer
Round 1: deposit 4,000, reserve 800, loan 3,200. Round 2: deposit 3,200, reserve 640, loan 2,560. Round 3: deposit 2,560, reserve 512, loan 2,048. Maximum total deposits = 4,000 x 5 = Rs 20,000; credit created = Rs 16,000.
Q4 · 4 marks · Short answerHarder board level
A bank has deposits of Rs 500 crore and reserves of Rs 100 crore. The required reserve ratio is 10%. Find its excess reserves and the maximum additional deposits that the banking system could build on them. (4 marks)
Hint
Required reserves are 10% of deposits.
Answer
Required reserves = 0.10 x 500 = Rs 50 crore; excess reserves = 100 - 50 = Rs 50 crore. With a multiplier of 1/0.10 = 10, additional deposits the system can build = 50 x 10 = Rs 500 crore.
Q5 · 3 marks · Short answerHOTS / competency
The RBI raises the reserve requirement from 20% to 25%. For a primary deposit of Rs 1,000 crore, find the change in the maximum total deposits and explain how this works as a limit on credit creation. Name two other limitations. (3 marks)
Hint
Compare 1,000 x 5 with 1,000 x 4.
Answer
At 20% the multiplier is 5 and deposits can reach Rs 5,000 crore; at 25% the multiplier is 4 and deposits fall to Rs 4,000 crore, a fall of Rs 1,000 crore. A higher reserve requirement leaves banks less to lend. Other limitations: cash drain (public holds cash) and lack of creditworthy borrowers or loan demand.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Credit multiplier formula?Show answer
1 / LRR.
2.What are derivative deposits?Show answer
Deposits created when banks grant loans.
3.Total deposits from Rs 100 at LRR 10%?Show answer
Rs 1,000.
4.High powered money consists of?Show answer
Currency with the public plus cash reserves of banks.
5.Name one limitation of credit creation.Show answer
Legal reserve requirement (or cash drain, lack of loan demand).

Credit Creation by Commercial Banks: Credit Multiplier and Limitations: frequently asked questions

How do banks create credit?

They lend a part of deposits, and the loans return as new deposits, which are lent again.

What is the credit multiplier?

The reciprocal of the legal reserve ratio, the number of times deposits can be expanded.

What is high powered money?

The monetary base: currency held by the public and cash reserves of banks with the central bank.

What are the limitations of credit creation?

Reserve requirements, cash drain, limited loan demand, excess reserves and central bank policy.