Recording of Transactions — Ledger & Subsidiary Books

The full picture

Once you have written every transaction in the journal, you need to organise that information by account. That is what the ledger does. Think of the ledger as a collection of individual account cards — one card for Cash, one for Rent, one for Debtors, one for Capital, and so on. Every account card has two sides: the left side is the Debit side and the right side is the Credit side. The act of copying each journal entry into the correct account card is called 'posting.' After posting, you can open the Cash account and see all cash inflows and outflows in one place, or open the Debtors account and see exactly who owes you money. The journal tells you what happened on a given day; the ledger tells you the running balance of each account.

Posting follows a fixed routine. When you record, say, 'Cash debited ₹1,000, Sales credited ₹1,000' in the journal, you open the Cash account in the ledger and write ₹1,000 on its debit side, then open the Sales account and write ₹1,000 on its credit side. Each entry also carries the date, a brief description, and the journal page number so you can trace it back if there is ever a question. This cross-referencing trail is called the audit trail. Accountants, tax officers, and bank auditors rely on it to confirm that the books are honest. Once all entries are posted, you find each account's balance by comparing the two sides: if the debit side total is larger, the account has a debit balance; if the credit side total is larger, it has a credit balance. Asset accounts normally carry debit balances; liabilities and capital normally carry credit balances — this is not a rule you need to memorise in isolation, it follows naturally from the nature of those accounts.

Now think about a busy shop. Anjali runs a stationery business near a school in Thrissur. On an average school day she makes 80 cash sales and receives 20 cheque payments from credit customers. If she tried to write each of these as a full journal entry and post each one to the ledger individually, she would spend more time writing than actually running the shop. This is the problem that subsidiary books solve. A subsidiary book is a specialised journal that collects one type of transaction. The most common subsidiary books are: the Cash Book (all cash and bank receipts and payments), the Purchases Book (credit purchases only), the Sales Book (credit sales only), the Purchases Returns Book (goods returned to suppliers), and the Sales Returns Book (goods returned by customers). Each subsidiary book is designed for speed — it has ready-made columns so you just fill in amounts without writing long descriptions each time.

The key efficiency of subsidiary books is in how they connect to the ledger. Instead of posting each of the 80 cash sales one by one, Anjali totals her cash book at the end of the month and posts that single total to the Cash account and the Sales account in the ledger. One posting replaces 80. The individual transaction details stay in the cash book as a reference — they are not lost — but the ledger only receives the summarised total. This saves enormous clerical effort in any business that handles more than a handful of daily transactions. It also reduces errors because there is less manual copying.

One subsidiary book deserves special attention: the Cash Book. Unlike other subsidiary books, the Cash Book works as both a book of original entry and a part of the ledger at the same time. When you record a cash receipt in the cash book, you have effectively posted it to the Cash account already — so you do not open a separate Cash ledger account. The cash book itself is the Cash and Bank ledger. This is why the closing balance of the cash book appears directly on the balance sheet. A double-column cash book has one column for physical cash and another for bank (cheque) transactions. A triple-column cash book adds a discount column. Keeping these columns separate prevents a common mix-up: physically receiving a cheque is a bank receipt, not a cash receipt.

An Indian example

Rajesh runs a small grocery (kirana) shop in Kozhikode. In the month of November he makes 600 cash sales totalling ₹1,80,000, buys goods on credit from four local wholesalers worth ₹90,000 in total, and pays ₹8,000 rent and ₹2,000 electricity by cash. If Rajesh wrote every cash sale as a separate journal entry and posted each one to the ledger, he would write 600 debit entries in the Cash account and 600 credit entries in the Sales account — nearly impossible to manage by hand. Instead, Rajesh records all 600 sales in his cash book as they happen, totals the cash book at month-end (₹1,80,000 received), and posts that single total to Sales and Cash in the ledger. His four credit purchases go into the Purchases Book; the month-end total of ₹90,000 posts as one entry to Purchases (debit) and Creditors (credit). His November ledger now shows clean, readable balances: Cash ₹1,70,000 (₹1,80,000 in minus ₹10,000 out), Sales ₹1,80,000 credit, Creditors ₹90,000 credit. The detail lives in the subsidiary books; the ledger carries the final picture.

Common misconceptions to watch for

• Many students think the journal and the ledger contain different transactions — as if some transactions go to the journal and others go to the ledger. In fact they contain the same transactions, just organised differently: the journal lists them in date order, while the ledger groups them by account. Nothing is recorded twice in terms of the events; only the perspective changes.
• Students often believe that using subsidiary books means you are doing extra work because you are writing things in two places. The opposite is true: subsidiary books reduce total ledger entries dramatically. Without a cash book, 100 cash transactions would create 100 individual postings to the Cash account in the ledger; with a cash book you post one monthly total — a single line. The subsidiary book absorbs the detail so the ledger stays clean.
• A very common error is assuming that once a transaction is in a subsidiary book it is 'done' and does not need to reach the ledger. This is wrong. The subsidiary book is only an intermediate step. The final, legal balances live in the ledger. If you prepare a trial balance or a balance sheet from subsidiary books alone, you will miss dozens of account balances and the trial balance will not tally.