Subsidiary Books in Class 11 Accountancy: Which Book Should You Use?

Subsidiary books can feel confusing in Class 11 Accountancy because every transaction suddenly seems to have a separate place.

Cash book, purchases book, sales book, purchase return book, sales return book, journal proper, ledger posting. The names are simple, but when a question gives five or six transactions together, many students stop and think, “Where should this go?”

That confusion is normal at the beginning.

The good news is that subsidiary books are not random. They are built around one practical idea: similar transactions should be recorded together.

If a business has many cash transactions, it is easier to record them in a cash book. If it has many credit purchases of goods, it is easier to record them in a purchases book. If it has many credit sales of goods, it is easier to record them in a sales book.

Once you learn the decision pattern, the chapter becomes much calmer.

What Subsidiary Books Actually Mean

In the beginning, students learn that transactions are first recorded in the journal and then posted to the ledger.

That is correct.

But in a real business, many transactions repeat again and again. A shop may make cash sales daily. A trader may buy goods on credit from suppliers every week. Customers may return goods. The business may return goods to suppliers. Recording every repeated transaction in one journal would make the journal bulky and slow to use.

So the journal is divided into special books for common types of transactions. These special books are called subsidiary books or special purpose books.

They are still books of original entry because transactions are first recorded in them before being posted to the ledger.

This difference matters because students sometimes write “ledger” when the question is asking for the book of original entry.

Why Businesses Use Subsidiary Books

Subsidiary books are not introduced just to make the syllabus longer. They solve a real accounting problem.

They help a business:

• record similar transactions in one place
• save time in writing repeated entries
• reduce confusion in large volumes of transactions
• divide accounting work between different people
• make ledger posting more organized
• find purchase, sales, and return details quickly

For a student, the main benefit is clarity. Instead of treating all transactions as one big list, you start grouping them by type.

That one question usually points you to the correct book.

The Main Subsidiary Books You Need to Know

Class 11 students usually deal with these important subsidiary books.

Book	Used for
Cash Book	Cash and bank receipts and payments
Purchases Book	Credit purchases of goods
Sales Book	Credit sales of goods
Purchases Return Book	Goods returned to suppliers
Sales Return Book	Goods returned by customers
Journal Proper	Transactions that do not fit the special books

This table is useful, but it is not enough. The real skill is knowing the limits of each book.

For example, purchases book does not mean every purchase. Sales book does not mean every sale. They have specific uses.

Cash Book: For Cash and Bank Transactions

The cash book records transactions involving cash or bank.

If cash is received, cash is paid, money is deposited into the bank, a cheque is received, or a payment is made through bank, the cash book may be involved.

Depending on what your teacher has taught, you may see:

• simple cash book
• cash book with bank column
• petty cash book

The important point is this: if cash or bank is part of the transaction, do not put it in the purchases book or sales book just because goods are involved.

Suppose goods are sold for cash. This is not recorded in the sales book. It is recorded in the cash book because the sale is for cash.

Suppose goods are purchased by cheque. This is not recorded in the purchases book. It is recorded in the cash book with bank column because payment is made through bank.

The sales book is for credit sales of goods. Cash sales go elsewhere.

Purchases Book: For Credit Purchases of Goods

The purchases book records credit purchases of goods.

This sentence has three important parts:

• it must be a purchase
• it must be on credit
• it must be goods for resale or business trading

If any one part is missing, be careful.

Bought goods from Riya on credit. This goes to the purchases book.

Bought goods for cash. This goes to the cash book.

Bought furniture on credit. This does not go to the purchases book because furniture is an asset, not goods purchased for resale. It goes to journal proper.

Bought stationery for office use on credit. This also does not go to the purchases book if stationery is treated as an expense item, not goods for resale. It usually goes to journal proper.

This is one of the most common Class 11 mistakes.

Sales Book: For Credit Sales of Goods

The sales book records credit sales of goods.

Again, all three parts matter:

• it must be a sale
• it must be on credit
• it must be goods

Sold goods to Aman on credit. This goes to the sales book.

Sold goods for cash. This goes to the cash book.

Sold old furniture on credit. This does not go to the sales book because furniture is an asset, not goods. It goes to journal proper.

Sold office equipment for cash. This goes through the cash book, not the sales book.

The sales book is not a place for every sale word in the question. It is only for credit sales of goods.

Those two questions prevent most wrong entries.

Purchases Return Book: When Goods Go Back to Suppliers

The purchases return book records goods returned by the business to its suppliers.

This is also called the return outwards book.

For example, a business bought goods from a supplier on credit. Later, some goods were found damaged or not as ordered. The business returns those goods to the supplier. This return is recorded in the purchases return book.

The word “outwards” helps you remember the direction. Goods are going out from the business back to the supplier.

Do not confuse it with sales return, where the customer returns goods to the business.

Sales Return Book: When Customers Return Goods

The sales return book records goods returned by customers.

This is also called the return inwards book.

For example, a business sold goods to a customer on credit. Later, the customer returns some goods because they are damaged or unsuitable. This return is recorded in the sales return book.

The word “inwards” helps you remember the direction. Goods are coming back into the business from the customer.

Students often mix up return books because both involve goods coming or going. Always ask, “Who is returning the goods?”

If the business returns goods to supplier, it is purchases return. If customer returns goods to business, it is sales return.

Journal Proper: The Book for Transactions That Do Not Fit Elsewhere

Journal proper is used for transactions that cannot be recorded in the special subsidiary books.

It is not a wastebasket for confusing transactions. It has a clear role.

Common examples include:

• credit purchase of assets
• credit sale of assets
• opening entries
• closing entries
• adjustment entries
• rectification entries
• transfer entries
• entries for bad debts or depreciation when required

If the transaction does not involve cash or bank, and it is not a credit purchase or credit sale of goods, and it is not a goods return, journal proper may be the right place.

For example, bought machinery from Raj on credit. This is a credit purchase, but not of goods. Machinery is an asset. So it goes to journal proper.

Sold old furniture to Karan on credit. This is a credit sale, but not of goods. Furniture is an asset. So it goes to journal proper.

This is why you should not decide only from the words bought or sold.

A Simple Decision Chart for Choosing the Right Book

Use this order when you solve questions.

Question to ask	If the answer is yes
Is cash or bank involved?	Cash Book
Is it credit purchase of goods?	Purchases Book
Is it credit sale of goods?	Sales Book
Is the business returning goods to supplier?	Purchases Return Book
Is the customer returning goods to business?	Sales Return Book
Does it fit none of these?	Journal Proper

This order is useful because cash and bank transactions are easy to identify first.

Then you check whether it is about goods. After that, you check whether it is a return. If nothing fits, journal proper remains.

With practice, this becomes automatic.

Common Traps in Subsidiary Books

Many mistakes happen because students read only one word in the transaction.

If they see “purchased”, they write purchases book.

If they see “sold”, they write sales book.

If they see “returned”, they guess between the two return books.

This is risky. Read the full transaction.

Transaction	Correct book	Why
Bought goods for cash	Cash Book	Cash is paid
Bought goods from Riya on credit	Purchases Book	Credit purchase of goods
Bought furniture from Riya on credit	Journal Proper	Asset, not goods
Sold goods to Aman on credit	Sales Book	Credit sale of goods
Sold goods for cash	Cash Book	Cash is received
Sold old machine on credit	Journal Proper	Asset, not goods
Returned goods to supplier	Purchases Return Book	Business returns purchased goods
Customer returned goods	Sales Return Book	Customer returns sold goods

For a furniture dealer, furniture may be goods. For a grocery shop using furniture in the office, furniture is an asset. Always understand the business context if the question gives one.

How Ledger Posting Fits In

Subsidiary books are not the end of the accounting process.

After recording transactions in subsidiary books, amounts are posted to ledger accounts. This is where students need to stay organized.

For example, entries from the purchases book are posted to the credit of individual suppliers and the total is posted to the debit of Purchases Account. Entries from the sales book are posted to the debit of individual customers and the total is posted to the credit of Sales Account.

At first, this may feel like a lot. But remember the purpose: subsidiary books collect similar transactions, and the ledger shows account-wise results.

Wrong book selection leads to wrong ledger posting.

A Practice Method That Actually Works

When you practise this chapter, do not start with long mixed questions immediately.

Start with small classification practice.

Write ten transactions and only identify the book. Do not prepare formats yet.

Then take the same ten transactions and write why each one belongs to that book.

After that, move to format and posting.

Here is a simple practice routine:

Step	What to do
1	Underline cash, bank, credit, goods, asset, return
2	Write the book name beside each transaction
3	Check if “goods” really means trading goods
4	Prepare the subsidiary book format
5	Post totals and individual accounts to ledger

This may feel slow in the beginning, but it builds accuracy.

If you get the book right, the rest of the question becomes much easier.

How to Think During a Test

In a test, do not panic when the question mixes many transactions.

Read once for meaning. Read again for classification.

Mark each transaction lightly:

• CB for cash book
• PB for purchases book
• SB for sales book
• PR for purchases return
• SR for sales return
• JP for journal proper

Then prepare the required books neatly.

This small marking step reduces pressure because you are not deciding everything while writing the final answer.

Also, pay attention to trade discount, freight, cartage, GST treatment, and other details your teacher has included in class. These may affect the amount or presentation, but they do not change the basic rule for choosing the book.

Frequently Asked Questions

Are subsidiary books and special purpose books the same?

Yes. In Class 11 Accountancy, subsidiary books are also called special purpose books because each book is used for a particular type of transaction.

Is the cash book a subsidiary book or a ledger account?

The cash book is a book of original entry because cash transactions are first recorded in it. It also works like a cash and bank ledger account because it is balanced like an account.

Do all purchases go into the purchases book?

No. Only credit purchases of goods go into the purchases book. Cash purchases go into the cash book, and credit purchases of assets usually go into journal proper.

Do all sales go into the sales book?

No. Only credit sales of goods go into the sales book. Cash sales go into the cash book, and credit sales of assets usually go into journal proper.

How do I remember purchases return and sales return?

Ask who is returning the goods. If the business returns goods to the supplier, it is purchases return. If the customer returns goods to the business, it is sales return.

When should I use journal proper?

Use journal proper for transactions that do not fit the cash book, purchases book, sales book, or return books. Common examples include credit purchase or sale of assets, opening entries, closing entries, adjustment entries, transfer entries, and rectification entries.