The purpose and preparation of the trial balance, the errors that a trial balance will and will not reveal, the use of a suspense account, and the correction of errors through journal entries.

What this dot point is asking

AQA wants you to prepare a trial balance, explain its purpose, list the errors it does and does not reveal, use a suspense account to balance the books temporarily, and correct errors using journal entries. This is unit 3.1.3, and error-correction journals with a suspense account are among the most reliably examined skills on Paper 1.

Purpose and preparation

To extract a trial balance, balance off every ledger account and list its closing balance under debit or credit. Assets, expenses and drawings are debit balances; liabilities, capital and income are credit balances. The two columns should total to the same figure. If they do, the books are arithmetically consistent, though not necessarily correct, as the error types below show.

Errors not revealed by the trial balance

Each of these leaves the trial balance in balance because, in every case, an equal debit and credit have still been recorded. The classic distinction examiners test is commission versus principle: commission keeps the transaction in the right class of account but the wrong individual account (sales to J. Smith posted to J. Smyth); principle puts it in the wrong class entirely (a new delivery van debited to motor expenses rather than non-current assets). An error of principle is the more serious because it misstates profit and the statement of financial position, not just a personal ledger.

Errors that do unbalance the trial balance include one-sided entries (only the debit or only the credit made), posting different amounts to each side, transposition errors in a single posting, and casting (addition) mistakes. These create a difference that must be parked somewhere while it is investigated, which is the role of the suspense account.

The suspense account and corrections

When the trial balance does not agree, the difference is entered in a suspense account so the books balance temporarily and the financial statements can be drafted while the error is hunted down. As each error is found, a journal entry clears the relevant amount from the suspense account and corrects the affected accounts. When the last error is cleared, the suspense account balance should be zero; if it is not, an error remains.

Why these checks matter

The trial balance applies the accruals-era principle that the double entry must be self-checking. It cannot guarantee correctness, but it localises arithmetical failure quickly and cheaply, before the misstatement reaches the published accounts and misleads the users identified in unit 3.1.1.

Try this

Q1. Name two errors that a trial balance will not reveal. [2 marks] For example an error of omission and a compensating error.

Q2. Explain the purpose of a suspense account. [2 marks] To hold the difference temporarily so the trial balance agrees and statements can be drafted while the error is investigated and corrected by journal.