Trial balance: what it proves, and what it does not
A trial balance that agrees says your debits equal your credits. It does not say the books are right. The five errors it cannot catch, and the checks that do catch them.
A trial balance is a list of every ledger with its balance on a given day — debit balances in one column, credit balances in the other. Because every entry was written once on each side, the two columns must add up to the same figure.
| Ledger | Debit | Credit |
|---|---|---|
| Capital | 20,00,000 | |
| Bank | 6,40,000 | |
| Stock (opening) | 9,00,000 | |
| Sundry debtors | 7,20,000 | |
| Sundry creditors | 4,90,000 | |
| Purchases | 38,00,000 | |
| Sales | 41,50,000 | |
| Expenses | 5,80,000 | |
| Total | 66,40,000 | 66,40,000 |
What an agreed trial balance proves
- Every voucher was complete — no entry was posted on one side only.
- The ledgers were added up and carried forward correctly.
- The opening balances, taken together, balanced.
With software these are almost guaranteed, because a voucher that does not balance cannot be saved. Which is exactly why an agreed trial balance tells you so little.
Five errors it will never show
- Omission — a bill that was never entered. Both sides are missing, so the totals still agree.
- Wrong account — a machine debited to Repairs, or a payment posted to the wrong party with a similar name.
- Wrong amount on both sides — ₹18,500 entered as ₹15,800. Debit and credit are wrong together.
- Compensating errors — one mistake of ₹5,000 too much and another of ₹5,000 too little.
- Entered twice — the same bill booked from the challan and again from the invoice.
When it does NOT agree
In software this nearly always comes from the opening balances. When a business moves to new books, the balances brought in from the old ones may not add up — capital left out, stock not valued, a party's bills not matching its ledger. The gap is usually parked in an account called Suspense or Opening Balance Difference.
The one line never to ignore A balance in Suspense or Opening Balance Difference is a to-do list, not a home. It means part of the opening position has not been entered. Find what it is — do not pass an entry to "adjust" it away.
The checks that find what the trial balance cannot
- Bank reconciliation — finds entries missing from the books and entries that never reached the bank.
- Party statements — ask two or three big customers and suppliers to confirm their balance.
- Stock count — finds sales and purchases that were never billed.
- GST matching — purchase register against GSTR-2B, sales register against GSTR-1.
- Reading the ledgers — a Repairs account that suddenly has one entry of ₹3,50,000 is asking to be looked at.