Maintenance of Subsidiary Books and Ledger: JAIIB AFM Guide 2026

If you are preparing for the JAIIB AFM exam. Mastering the maintenance of subsidiary books and ledger is non-negotiable. This single topic from AFM Module A quietly decides whether the rest of your accounting paper feels easy or impossible. Get the foundation right. And journal entries, trial balance, and final accounts all fall into place.

This 2026 guide breaks down subsidiary books. The ledger. Journal entries.

Types of accounts. And the golden rules of accounting in the simplest possible way. You get real banking examples, exam-focused explanations, and a clear study plan.

Let us make accounting effortless.

What Are Subsidiary Books in Accounting?

Subsidiary books are special-purpose books used to record transactions of a similar nature in one place. Instead of passing a separate journal entry for every single sale or purchase. Businesses group them.

Think of a busy bank branch. Recording every transaction in one main journal would be slow and messy. Subsidiary books solve this by creating dedicated registers for each type of transaction.

These books are also called books of original entry or day books. They are the first formal record of a transaction before it reaches the ledger.

Why Subsidiary Books Matter for JAIIB AFM

• Speed: Similar transactions are recorded together, saving time.
• Division of work: Different clerks can maintain different books at once.
• Fewer errors: Specialisation reduces mistakes and makes checking easier.
• Easy reference: Need all credit sales? Open the Sales Book. Done.

Types of Subsidiary Books You Must Know

For the AFM paper. You should be able to name each subsidiary book. State exactly what it records. Here is the complete list in one clean table.

Subsidiary Book	What It Records	Also Known As
Purchases Book	Credit purchases of goods only	Purchase Day Book
Sales Book	Credit sales of goods only	Sales Day Book
Purchases Return Book	Goods returned to suppliers	Return Outward Book
Sales Return Book	Goods returned by customers	Return Inward Book
Cash Book	All cash and bank receipts/payments	—
Bills Receivable Book	Bills received from debtors	B/R Book
Bills Payable Book	Bills accepted to creditors	B/P Book
Journal Proper	Entries that fit no other book	General Journal

Exam tip: Only credit transactions of goods go into the Purchases. Sales Books. Cash purchases and cash sales go into the Cash Book. This distinction is a favourite of examiners.

The Cash Book: A Special Subsidiary Book

The Cash Book is unique. It is both a subsidiary book and a part of the ledger. It records every cash and bank transaction in date order.

Because it doubles as a ledger account. You never open a separate Cash Account in the ledger. The Cash Book itself gives you the closing cash and bank balance.

Common Types of Cash Book

• Single Column Cash Book: Records only cash transactions.
• Double Column Cash Book: Adds a bank column (or a discount column).
• Triple Column Cash Book: Has cash, bank, and discount columns.
• Petty Cash Book: Records small day-to-day expenses like postage and stationery.

Understanding the Journal: The Book of Prime Entry

The journal is the very first step in the accounting cycle. It is called the Book of Prime Entry. Every transaction is recorded here first. In chronological order, before moving to the ledger.

Each journal entry shows the accounts affected. The amounts, and a short narration explaining the transaction.

Example: Rohit Sharma invested ₹50,000 in his business.

Cash A/c Dr. ₹50,000   To Capital A/c ₹50,000

Simple vs Compound Journal Entry

A simple journal entry involves only two accounts. One debit and one credit.

Example: Paid ₹10,000 wages to workers.

Wages A/c Dr. ₹10,000   To Cash A/c ₹10,000

A compound journal entry involves more than two accounts.

Example: Paid ₹10,000 wages — ₹5,000 in cash and ₹5,000 via bank.

Wages A/c Dr. ₹10,000   To Cash A/c ₹5,000   To Bank A/c ₹5,000

The Ledger: The Book of Final Entry

Once transactions are recorded in the journal or subsidiary books. They are transferred to the ledger. The ledger is the Book of Final Entry.

The process of transferring entries from the journal to the ledger is called posting. Each ledger account collects all transactions relating to one item — for example. One account for Cash, one for Capital, one for Wages.

At the end of a period, each ledger account is balanced. These balances are then used to prepare the trial balance and. Finally, the financial statements.

Journal vs Ledger: The Key Difference

Students often confuse the two. This comparison clears it up instantly.

Basis	Journal	Ledger
Meaning	Book of prime entry	Book of final entry
Order	Recorded by date (chronological)	Grouped by account (analytical)
Process	Journalising	Posting
Balancing	Not balanced	Balanced periodically

Types of Accounts and the Golden Rules of Accounting

Every account belongs to one of three categories. Knowing the category tells you which golden rule to apply. This is the heart of journal entries.

1. Personal Accounts

These relate to persons. Firms. Or institutions — for example, Rohit's A/c, a bank, or a company.

Golden Rule: Debit the receiver, Credit the giver.

2. Real Accounts

These relate to assets and properties — for example, Cash, Machinery, Building, Furniture.

Golden Rule: Debit what comes in, Credit what goes out.

3. Nominal Accounts

These relate to expenses. Losses, incomes, and gains — for example, Wages, Rent, Interest, Commission.

Golden Rule: Debit all expenses and losses, Credit all incomes and gains.

How to Study Subsidiary Books and Ledger for JAIIB AFM

Theory alone will not get you marks. AFM rewards practice. Follow this simple, proven study plan.

1. Learn the flow first. Memorise: Journal → Ledger → Trial Balance. Everything connects to it.
2. Master the three golden rules. Write 10 entries daily until classification is instant.
3. Drill the subsidiary book table. Be able to match each transaction to the correct book.
4. Solve full cycles. Take a set of transactions. Carry them from journal to ledger to trial balance.
5. Attempt timed practice. Use our mock tests to build speed and accuracy under exam pressure.
6. Revise with notes. Read our free guides the night before for quick recall.

Common Mistakes to Avoid in Accounting

Even strong candidates lose easy marks to avoidable slips. Watch out for these.

• Mixing cash. Credit: Putting cash sales in the Sales Book instead of the Cash Book.
• Omitting transactions: Forgetting an entry distorts the trial balance.
• Wrong classification: Treating an expense as an asset breaks the balance sheet.
• Ignoring narration: Skipping the explanation under a journal entry can cost marks.
• Breaking double entry: Every debit must have an equal and opposite credit.
• Calculation errors: A small arithmetic mistake snowballs through final accounts.

Worked Example: From Journal to Ledger

Let us tie it all together with a short worked example. This is exactly the kind of flow the AFM exam tests.

Transaction: Amit started a business with ₹1,00,000 cash and immediately paid ₹20,000 as rent.

Step 1 — Journal entries:

Cash A/c Dr. ₹1,00,000   To Capital A/c ₹1,00,000 Rent A/c Dr. ₹20,000   To Cash A/c ₹20,000

Step 2 — Post to the ledger:

• Cash A/c: Debited ₹1,00,000, credited ₹20,000 → closing balance ₹80,000.
• Capital A/c: Credited ₹1,00,000.
• Rent A/c: Debited ₹20,000.

Notice how each amount in the journal moves cleanly into its own ledger account. That is posting in action. And it is the skill that earns marks in numerical questions.

Advantages of Maintaining Subsidiary Books and a Ledger

Why does the system work so well? Understanding the benefits helps you answer theory questions with confidence.

• Organised records: Every transaction has a clear, logical home.
• Faster reporting: Balances are ready when final accounts are prepared.
• Easy auditing: Auditors can trace any figure back to its source quickly.
• Accountability: Splitting work across books fixes responsibility on each clerk.
• Error detection: The trial balance flags arithmetic mismatches early.

Frequently Asked Questions (FAQ)

What is the difference between a journal and a ledger?

The journal is the book of prime entry where transactions are recorded first in date order. The ledger is the book of final entry where those transactions are grouped by account through posting. Then balanced.

Is the Cash Book a subsidiary book or a ledger?

It is both. The Cash Book records cash and bank transactions like a subsidiary book. But it also serves as a ledger account. So a separate Cash Account is not maintained.

What goes into the Sales Book?

Only credit sales of goods are recorded in the Sales Book. Cash sales are recorded in the Cash Book. And sale of assets is recorded through the Journal Proper.

How many subsidiary books are there for JAIIB AFM?

The commonly studied subsidiary books are eight: Purchases Book. Sales Book. Purchases Return Book.

Sales Return Book. Cash Book, Bills Receivable Book, Bills Payable Book, and Journal Proper. Always confirm the exact scope on the latest official IIBF notification.

What are the three golden rules of accounting?

Personal Account — debit the receiver, credit the giver. Real Account — debit what comes in, credit what goes out. Nominal Account — debit all expenses and losses, credit all incomes and gains.

Final Thoughts: Build Your Accounting Foundation Now

The maintenance of subsidiary books. Ledger is the bedrock of the entire JAIIB AFM paper. Once you can journalise confidently. Route transactions to the right subsidiary book. And post to the ledger, the rest of accounting feels simple.

Be consistent. Practise a few entries every day. Solve complete cycles, and test yourself often. Small daily effort compounds into a confident exam performance. You have got this — start today and make every mark count.

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