Books of Original Entry Questions for SSC CGL

What Are Books of Original Entry?

Books of Original Entry (also called Subsidiary Books or Day Books) are the first point where business transactions are recorded in chronological order. They act as a filter before data reaches the Ledger. Think of them as a sorting system: raw transactions come in, get classified by type, and then summarized into the Ledger. Every transaction must pass through one of these books first. They improve efficiency because instead of posting hundreds of individual entries to the Ledger, you post summaries (totals) from each book.

• First record of transactions — entered before Ledger posting
• Classified by transaction type (sales, purchases, cash, journal entries)
• Reduce Ledger clutter by grouping similar transactions
• Provide audit trail and internal control
• Not part of the double-entry system themselves — they feed into it

Types of Books of Original Entry

There are five main subsidiary books in a typical business. Each handles a specific category of transaction. The key is recognizing which book to use based on the nature of the transaction. Sales Book records credit sales only (not cash sales). Purchase Book records credit purchases only. Cash Book records all cash/bank transactions. Journal Proper handles non-routine transactions. Bills Receivable and Bills Payable books (sometimes combined into one) record negotiable instruments.

• Sales Book — credit sales of goods only (not services, not cash sales)
• Purchase Book — credit purchases of goods only (not services, not cash purchases)
• Cash Book — all cash and bank transactions (receipts and payments)
• Journal Proper — returns, adjustments, opening entries, non-routine items
• Bills Receivable Book — promissory notes and cheques received
• Bills Payable Book — promissory notes and cheques issued

Sales Book (Sales Day Book)

The Sales Book records only credit sales of goods. Cash sales do NOT go here — they go to Cash Book. Services sold on credit also do NOT go here (they go to Journal Proper). Each entry shows: date, customer name, invoice number, and amount. At the end of the period, the total is posted as a debit to Accounts Receivable and a credit to Sales in the Ledger. This is a one-sided book (only shows debit side of the entry).

• Records ONLY credit sales of goods (merchandise)
• Excludes cash sales and service sales
• Posted as: Debit Accounts Receivable, Credit Sales (in Ledger)
• Subsidiary ledger of Accounts Receivable is maintained from this book
• Common SSC trap: confusing credit sales with cash sales

Purchase Book (Purchase Day Book)

Mirror image of Sales Book. Records only credit purchases of goods. Cash purchases and service purchases go elsewhere. Each entry shows: date, supplier name, invoice number, and amount. Total is posted as a debit to Purchases and a credit to Accounts Payable in the Ledger. Subsidiary ledger of Accounts Payable is maintained from this book.

• Records ONLY credit purchases of goods
• Excludes cash purchases and service purchases
• Posted as: Debit Purchases, Credit Accounts Payable (in Ledger)
• Supplier-wise details maintained in Accounts Payable subsidiary ledger
• SSC often tests: 'Where would a cash purchase entry go?' (Answer: Cash Book, not Purchase Book)

Cash Book

The Cash Book is unique — it is BOTH a book of original entry AND a ledger account (it replaces the Cash account in the Ledger). It records all cash and bank transactions: receipts on the left (debit), payments on the right (credit). The Cash Book is typically three-column: Cash column, Bank column, and Discount column. The balance at the end of the Cash Book is the actual cash/bank balance. This book requires Bank Reconciliation because the Cash Book balance may differ from the bank statement due to timing differences (cheques in transit, deposits not yet cleared, bank charges).

• Records ALL cash and bank transactions (both receipts and payments)
• Acts as both a subsidiary book and a Ledger account
• Three-column format: Cash, Bank, Discount columns
• Balance in Cash Book = actual cash/bank held (before reconciliation)
• Bank Reconciliation Statement required to match Cash Book with bank statement
• Discount column records cash discounts allowed (debit) and received (credit)

Journal Proper (General Journal)

The Journal Proper handles all transactions that don't fit into the specialized books. This includes: opening entries, closing entries, returns (sales returns and purchase returns), adjustments, depreciation, bad debts, and non-routine transactions. Each entry is recorded in full double-entry format: date, account to debit, account to credit, and amount. Returns can also have their own dedicated books (Sales Returns Book, Purchase Returns Book), but in simpler systems they go to Journal Proper.

• Records non-routine and adjusting transactions
• Includes: opening entries, closing entries, returns, depreciation, bad debts
• Full double-entry format shown (unlike Sales/Purchase Books which are one-sided)
• Posted individually to Ledger (not summarized like Sales/Purchase Books)
• SSC tests: identifying which transactions belong in Journal Proper vs. specialized books

Bank Reconciliation Statement

The Cash Book balance and the bank statement balance rarely match on the same date due to timing differences. Bank Reconciliation Statement is prepared to explain these differences. Common reasons: cheques issued but not yet presented (deduct from bank statement), deposits made but not yet credited (add to bank statement), bank charges (deduct from bank statement), interest credited (add to bank statement). The reconciliation starts with either the Cash Book balance or the bank statement balance and adjusts to reach the other figure. SSC typically asks: 'Prepare a Bank Reconciliation Statement given Cash Book balance and bank statement balance.'

• Explains difference between Cash Book balance and bank statement balance
• Common adjustments: cheques in transit, deposits not cleared, bank charges, interest
• Can start from Cash Book balance OR bank statement balance
• Cheques issued but not presented: deduct from bank statement
• Deposits made but not credited: add to bank statement
• Bank charges and errors: adjust Cash Book, then reconcile

• Confusing Sales Book with Cash Book — Sales Book is ONLY for credit sales; cash sales go to Cash Book. SSC loves this trap.
• Posting Purchase Book entries incorrectly — remember: Debit Purchases, Credit Accounts Payable (not the other way around).
• Forgetting that Cash Book is BOTH a subsidiary book and a Ledger account — it replaces the Cash/Bank account in the Ledger, so you don't post it again.
• Misidentifying where service transactions go — credit sales of services go to Journal Proper, NOT Sales Book (Sales Book is goods only).
• Bank Reconciliation direction errors — if starting from bank statement, cheques not presented are deducted; if starting from Cash Book, they are added. Aspirants often reverse this.

• SPJCB mnemonic: Sales Book, Purchase Book, Journal Proper, Cash Book — the four main books you'll see in SSC.
• Credit = Subsidiary Book; Cash = Cash Book — if it's a credit transaction of goods, it goes to Sales/Purchase Book. If it's cash, it goes to Cash Book.
• Cash Book = Ledger Account too — it's the only subsidiary book that also serves as a Ledger account. Don't post it twice.
• Bank Reconciliation = Time Lag Explainer — cheques in transit and deposits not cleared are timing issues, not errors. They explain why Cash Book and bank statement differ.

• SSC Tier-II typically has 1-2 questions on identifying which book to use (scenario-based). Example: 'Goods purchased on credit from XYZ Ltd. Where is this recorded?' Answer: Purchase Book.
• Bank Reconciliation Statement is a high-frequency topic — expect a 2-3 mark question asking you to prepare one given Cash Book balance and bank statement balance with 3-4 adjustments.
• Journal Proper questions often test your ability to distinguish it from specialized books. Example: 'Where would you record sales returns?' Answer: Sales Returns Book or Journal Proper (depending on whether a dedicated Returns Book exists).
• Cash Book three-column format (Cash, Bank, Discount) is tested — know what each column records and how to balance it.
• Recent SSC papers show increased focus on practical scenarios: 'Given these transactions, prepare entries in appropriate books.' Ensure you can quickly identify the correct book for each transaction type.