A balanced Trial Balance does not guarantee absolute accuracy. Several errors, known as 'compensating errors' or 'errors of principle,' do not affect the equality of debits and credits and thus are not disclosed by a Trial Balance. These include:
- Errors of Omission: When a transaction is completely omitted from the books of accounts (e.g., a purchase invoice not recorded at all).
- Errors of Commission (Compensating Errors): When two or more errors cancel out each other's effect on the debit and credit totals (e.g., an over-debit of ₹100 in one account and an over-credit of ₹100 in another).
- Errors of Principle: When a transaction is recorded in violation of fundamental accounting principles (e.g., treating the purchase of a machine as a revenue expense by debiting 'Repairs Account' instead of 'Machinery Account').
- Errors of Original Entry: When a transaction is recorded incorrectly in the subsidiary books (e.g., journal) and this incorrect amount is then correctly posted to the ledger accounts.
- Posting to the Wrong Account but on the Correct Side: For example, a payment made to 'Supplier A' is correctly credited to 'Cash Account' but incorrectly debited to 'Supplier B's Account' instead of 'Supplier A's Account'.