The trial balance

What it is

Take every ledger, write its closing balance in the debit column or the credit column, and add both columns up. Because every entry was written on two sides, the totals must be equal. That is the whole test.

What it proves

Only that the arithmetic is complete — that no entry was written on one side and not the other. It is a check on the mechanics, and a genuinely useful one.

What it does not catch

This is the part that catches people out. A trial balance agrees perfectly when:

• An entry was never made at all. Both sides missing, both columns short by the same amount.
• An entry was posted to the wrong ledger of the right type — Sharma's payment recorded against Verma. The debtors total is right and both parties are wrong.
• The same wrong amount was used on both sides. ₹5,400 keyed as ₹4,500 twice balances beautifully.
• An entry was recorded twice in full.

So an agreed trial balance means the books are arithmetically sound, not that they are right. The four above are found by reading the ledgers and confirming balances with parties, never by the trial balance itself.

Finding a difference

When it does not agree, the difference is itself a clue:

• Divisible by 9, and often two digits swapped — 540 keyed as 450.
• Exactly twice an entry you recognise: it was posted to the wrong side.
• A round number: usually one whole entry missing a side.
• Otherwise narrow it by date. Run the trial balance to the end of each month, find the first month that breaks, then the first week, then read that day book.

In software this class of difference should not arise at all, because the two sides are written together from one document — you never key a debit and then have to remember a credit. What software cannot do is notice that the document named the wrong party.

Which edition. Accounting — ledgers, vouchers, trial balance, profit & loss and balance sheet — is in Silver. Basic is billing and inventory: invoices, stock, parties, outstanding and GST reports, and no ledgers. Both prices are on the pricing page.

This page explains how book-keeping works so a shopkeeper can follow what an accountant is asking for. It is not accounting or tax advice — talk to your accountant before you rely on it for a filing or a return.

Questions

My trial balance agrees. Are my books correct?

They are arithmetically complete. A missing entry, a posting to the wrong party, or the same wrong amount on both sides all leave it agreeing.

Why is my difference divisible by nine?

Almost always two digits swapped — 540 keyed as 450. Divide the difference by nine and look for entries of about that size.

Do I need a trial balance if I use software?

You will rarely need it to find a one-sided posting, because there are none. You will still be asked for it — by your accountant, at year end, and by a bank.