The trial balance
How it works: In double-entry bookkeeping, every transaction has equal debits and credits. Therefore, the total of all debit balances must equal the total of all credit balances.
\text{Total Debit Balances} = \text{Total Credit Balances}
Limitations: A balanced trial balance does not prove that the accounts are correct. It only proves that debits equal credits. Many errors can exist even if the totals match (see 'Errors Not Revealed').
- Assets & Expenses = Debit balance
- Liabilities, Equity & Income = Credit balance
Step 2: Sum the Debit column and the Credit column separately.
Step 3: Compare totals. If they differ, the difference is placed in a Suspense Account on the shorter side to make them equal.
| Account | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Capital | Equity | 20,000 | |
| Sales | Income | 73,250 | |
| Purchases | Expense | 41,785 | |
| Trade Receivables | Asset | 6,100 | |
| Bank Overdraft | Liability | 3,106 | |
| Suspense Account | Balancing Figure | 18,471 | |
| Total | 66,356 | 96,356 |
Debits: 41,785 + 6,100 = 47,885.
Credits: 20,000 + 73,250 + 3,106 = 96,356.
Difference: 96,356 - 47,885 = 48,471.
Correction for clarity in exam context: If the trial balance is unbalanced, you must open a Suspense Account. The suspense account holds the difference until errors are found. If the trial balance balances initially, there may still be errors (see below).
Correct Understanding: The trial balance is merely a list of balances extracted from the ledger. It is a check tool, not a financial statement. A balanced trial balance can still contain significant errors (e.g., omissions, wrong accounts).
Context: When asked to identify errors that do not affect the trial balance totals, you must name the specific type. Examiners look for precise terminology.
Why this is accepted: These errors do not break the equality of debits and credits because they either miss both sides or swap them incorrectly but equally.
Key Types to Memorize:
- Error of Commission: Recorded in the wrong account, but the same class (e.g., Debited to J Sharp instead of T Sharpe; both are Trade Receivables).
- Compensating Error: Two or more errors cancel each other out (e.g., Sales overcast by 100 and Purchases overcast by100).
- Complete Reversal: The correct accounts are used, but the sides are swapped (e.g., Dr Sales, Cr Bank instead of Dr Bank, Cr Sales).
- Error of Omission: The entire transaction is left out of the books.
- Error of Original Entry: The wrong amount is recorded in both accounts (e.g., 500 recorded instead of50).
- Error of Principle: Recorded in the wrong class of account (e.g., Debiting a Fitting (Asset) as an Expense).
- Error of Commission (1) 2. Error of Omission (1)