The short version
- Day book: everything that happened, in date order. Cash book: money in and out. Ledger: everything grouped by account or party.
- The same transaction appears in all three, from three points of view, which is what lets you check one against another.
- Double entry means every transaction hits two accounts, and the two sides must be equal.
- The trial balance is the proof that they are: if it does not tie, something is missing, not just wrong.
- Profit and loss and balance sheet are summaries of the ledger, not separate records you maintain.
The day book
Every transaction, in the order it happened. Sales, purchases, expenses, receipts, payments, returns: one running record of the day. Its job is completeness, not analysis. If something happened and is not in the day book, it is not in the books at all, and no amount of clever reporting will find it later.
This is the register most shops already keep, in some form. Opening the day book for a date is how you answer "what happened last Tuesday".
The cash book
Money in and money out, and the balance after each. It answers a different question: not what happened, but where the cash is. A cash book with a bank column tracks the bank account alongside the cash drawer, which is how most businesses run it.
The cash book has a property the others do not: it can be verified physically. Count the drawer, compare with the book, and you know immediately whether your records are keeping up. Doing that daily catches errors while anyone still remembers the transaction.
The ledger
The same transactions, regrouped by account. A ledger account for each customer, each supplier, each expense head, each bank account, sales, purchases, stock, capital. Where the day book is chronological, the ledger is thematic: it answers "how much has Sharma Traders bought, paid and still owes" or "what did we spend on transport this year".
A party's ledger account is exactly what a khata is. The word is older than the software.
Why double entry
Every transaction moves two accounts in opposite directions. Sell goods for cash: cash goes up, sales goes up. Buy on credit: purchases go up, the supplier's balance goes up. Pay the supplier: their balance goes down, cash goes down.
That symmetry is not academic. It means the books can be checked against themselves, and it means one mistyped figure shows up as an imbalance instead of quietly sitting in a total. Single-entry records, the ones that just list transactions, have no such check, and that is why they drift.
The trial balance
A list of every ledger account with its balance, debits in one column and credits in the other. The two columns must be equal. If they are not, something is missing or has been posted once instead of twice, and you find it before it becomes a report.
A trial balance that ties does not prove every entry is right: it proves that every entry is complete. A sale posted to the wrong customer still balances. That is what reconciliation and review are for.
What the reports are
Profit and loss, balance sheet and cash flow are not separate books you maintain. They are views of the ledger:
- Profit and loss: income and expense accounts for a period.
- Balance sheet: asset, liability and capital accounts at a date.
- Cash flow: the movement of cash across the period.
Which is why the quality of the reports is decided at the entry, not at month end.
The same books, without the books
AawazAI keeps a real double-entry ledger underneath a khata that looks like the one you already use. You say a sale; the app posts it to the journal, moves the party balance, moves stock and records the tax position in one transaction. Debit equals credit is enforced by the database rather than by discipline, so an unbalanced entry cannot exist. What you see is the day book, the party khata and the reports; what your CA sees is a trial balance that ties.
Real books under a simple khata
AawazAI keeps a double-entry ledger with balance enforced by the database, and shows you the day book, the party khata and the reports your CA asks for.
Frequently asked questions
What is the difference between a day book and a ledger?
The day book records every transaction in date order, so it answers what happened on a given day. The ledger regroups the same transactions by account or party, so it answers how much a particular customer owes or how much was spent on an expense head.
What is a cash book used for?
To track money in and out with a running balance, usually with a bank column alongside cash. Its advantage is that it can be verified physically by counting the drawer and comparing.
What does double entry mean?
Every transaction is recorded in two accounts, one debit and one credit, of equal amount. The symmetry allows the books to be checked against themselves, which single-entry records cannot do.
What is a trial balance?
A list of all ledger balances with debits and credits in separate columns. The totals must be equal. It proves the entries are complete, though not that each one was posted to the right account.
Is a khata the same as a ledger account?
Yes. A party khata is the ledger account for one customer or supplier: every sale, payment and return with them, and the balance those add up to.