A trial balance is a list of ledger balances placed in debit and credit columns at a stated date. Equal totals are a useful check, but they are a narrow one. A transaction can be missing entirely or recorded in the wrong accounts while the two totals still agree.
We will prepare a trial balance for Fernbridge Supplies, a fictional classroom business, then diagnose two known transcription mistakes. All amounts are invented KSh. The supplied balances are already extracted from the ledger; no ledger reconstruction, tax treatment, profit calculation or suspense account is required.
Know what is being transferred
Transfer each ledger account’s balance, not the total of all its transactions. Put a debit balance in the debit column and a credit balance in the credit column. Include the business name and date so the reader knows which set of balances the statement represents.
Assets, expenses and drawings commonly have debit balances; capital, liabilities and income commonly have credit balances. These patterns help you check a list, but the actual account balance matters. “Bank” does not always mean debit: an explicitly stated overdraft is a credit balance. Do not replace a stated side with a memorised guess.
NCERT’s Trial Balance and Rectification of Errors explains the balancing process and errors that can escape it. Here we use the balance method only: one net balance per supplied account. The figures are original and the examples establish no legal, tax or current curriculum-placement claim.
Worked case 1: build the statement from ten balances
| Account | Balance side | Amount |
|---|---|---|
| Shop equipment | Debit | 54,000 |
| Opening inventory | Debit | 12,000 |
| Purchases | Debit | 38,500 |
| Trade receivables | Debit | 14,500 |
| Bank, favourable | Debit | 9,000 |
| Rent expense | Debit | 6,000 |
| Drawings | Debit | 4,000 |
| Capital | Credit | 62,000 |
| Sales | Credit | 58,000 |
| Trade payables | Credit | 18,000 |
There are seven debit balances and three credit balances. Mark each source line as it is transferred, so a correct-looking total does not distract you from a missing account. Opening inventory is explicitly supplied; do not invent a closing-inventory balance or an adjustment.
| Account | Debit | Credit |
|---|---|---|
| Shop equipment | 54,000 | — |
| Opening inventory | 12,000 | — |
| Purchases | 38,500 | — |
| Trade receivables | 14,500 | — |
| Bank, favourable | 9,000 | — |
| Rent expense | 6,000 | — |
| Drawings | 4,000 | — |
| Capital | — | 62,000 |
| Sales | — | 58,000 |
| Trade payables | — | 18,000 |
| Totals | 138,000 | 138,000 |
The debit control total is 54,000 + 12,000 + 38,500 + 14,500 + 9,000 + 6,000 + 4,000 = KSh138,000. Independently, credit is 62,000 + 58,000 + 18,000 = KSh138,000. The two totals agree, and all ten source balances appear once.
This is a successful transfer check, not evidence that Fernbridge earned KSh138,000. Equipment, drawings and capital sit beside trading balances in the same statement. The column total has no simple meaning as profit, sales or cash available.
Worked case 2: repair a deliberately flawed copy
A learner copies Purchases as KSh35,800 instead of KSh38,500 and puts the KSh9,000 favourable bank balance in the credit column. All other lines are copied correctly. This creates the following faulty version.
| Account | Debit | Credit |
|---|---|---|
| Shop equipment | 54,000 | — |
| Opening inventory | 12,000 | — |
| Purchases | 35,800 | — |
| Trade receivables | 14,500 | — |
| Bank, favourable | — | 9,000 |
| Rent expense | 6,000 | — |
| Drawings | 4,000 | — |
| Capital | — | 62,000 |
| Sales | — | 58,000 |
| Trade payables | — | 18,000 |
| Faulty totals | 126,300 | 147,000 |
The difference is 147,000 − 126,300 = KSh20,700, with credit greater. That number alone does not identify the cause. Here we can trace both errors because the original ledger-balance list is supplied.
First move Bank back to debit. Debit increases by KSh9,000 to KSh135,300; credit decreases by KSh9,000 to KSh138,000. The remaining difference is KSh2,700. The wrong-side entry contributed twice KSh9,000, or KSh18,000, to the original discrepancy.
Next correct Purchases from KSh35,800 to KSh38,500. Debit increases by 38,500 − 35,800 = KSh2,700 and becomes KSh138,000. Both columns now agree at their independently calculated control total.
| Stage | Debit, KSh | Credit, KSh | Credit minus debit, KSh |
|---|---|---|---|
| Faulty copy | 126,300 | 147,000 | 20,700 |
| After restoring Bank to debit | 135,300 | 138,000 | 2,700 |
| After correcting Purchases | 138,000 | 138,000 | 0 |
Notice what we did not do: alter Capital, insert a mystery amount or accept the first pair of equal totals. Each correction has an identified account, a source balance and a measurable effect. A difference divisible by nine may suggest a digit-order error, but it is only a clue and never proof.
Worked case 3: complete omission can preserve agreement
Consider a separate business with an otherwise correct trial balance. It buys shop equipment on credit for KSh7,600, but the entire transaction is omitted. The missing correct entries would increase Equipment on the debit side and the supplier liability on the credit side by the same KSh7,600.
Because both aspects are missing, the incorrect trial balance can still agree. In this example, both the equipment balance and the amount owed are understated by KSh7,600. No amount of simply re-adding the existing columns will discover a transaction that never reached the books. Compare source documents with records to test completeness.
Worked case 4: complete reversal can also preserve agreement
A customer pays an existing debt of KSh2,800 into the business bank. Correctly, Bank is debited and the customer’s receivable is credited. Suppose both sides are reversed: Bank is credited and Receivables is debited.
The mistaken entry still contains equal debit and credit amounts of KSh2,800, so it preserves arithmetic equality. Yet each affected balance is KSh5,600 away from its correct position: the bank has been reduced instead of increased, and the receivable increased instead of reduced. The gap is twice KSh2,800.
This is not the same as moving just one already-extracted balance into the wrong trial-balance column. A complete reversal affects both sides of a transaction. That distinction explains why one example keeps equality while the bank-copying error in case 2 destroys it.
What other errors can remain?
If an entire transaction is recorded at the same wrong amount on both sides, equality may survive. So may a debit to the wrong expense account when the matching credit is correct. Two unrelated one-sided mistakes can also offset each other. These examples do not make checking useless; they show why different checks answer different questions.
Use the trial balance to test the arithmetic relationship of the listed balances. Use account-by-account comparison to test transfer accuracy. Use documents and transaction explanations to test completeness, amounts and account choice. One successful test does not replace the others.
Three solved practice tasks
Task 1: assemble a fresh small trial balance
Question: Supplied balances are Cash debit KSh6,500, Equipment debit KSh24,000, Purchases debit KSh13,500, Rent debit KSh3,000, Capital credit KSh30,000, Sales credit KSh12,000 and Payables credit KSh5,000. State both totals.
Solution: Debit = 6,500 + 24,000 + 13,500 + 3,000 = KSh47,000. Credit = 30,000 + 12,000 + 5,000 = KSh47,000. Four debit and three credit balances account for all seven source lines. Agreement does not provide a profit figure.
Task 2: calculate the effect of one wrong-side balance
Question: An otherwise correct trial balance totals KSh52,000 on each side. A KSh1,250 debit balance for stationery expense is instead copied to credit. Find the faulty totals and correction.
Solution: Faulty debit = 52,000 − 1,250 = KSh50,750; faulty credit = 52,000 + 1,250 = KSh53,250. Credit exceeds debit by KSh2,500. Remove KSh1,250 from credit and restore it to debit; both totals return to KSh52,000.
Task 3: interpret a balanced mistake
Question: A cash payment of KSh1,900 for rent is completely omitted. A learner says no error exists because the trial balance agrees. Explain.
Solution: Both the debit to Rent and credit to Cash are missing. Equality can remain, while Rent is understated by KSh1,900 and Cash overstated by KSh1,900 relative to the correct records. Check the payment evidence; agreement alone does not settle the issue.
Frequently asked questions
- Does an agreed trial balance prove the books are correct?
- No. It shows equality of the listed debit and credit balances. Complete omissions, reversals and other balanced errors can remain.
- Is the trial-balance total the profit?
- No. The total combines different kinds of balances. Calculating profit needs the relevant income, expenses and adjustments, not subtraction of equal column totals.
- Why can a wrong-side entry cause twice the amount as the difference?
- Moving a debit balance to credit both removes that amount from debit and adds it to credit. A single KSh900 wrong-side error therefore creates a KSh1,800 difference.
- Should I use the account name or its supplied balance side?
- Use the actual ledger balance and its stated side. Normal account patterns help detect a possible mistake but do not override clear evidence, such as a bank overdraft.
- Can I change capital just to force agreement?
- No. A changed capital figure without source evidence hides the discrepancy. Trace the error back to the supplied ledger balances or original records.
- What does a blank amount cell mean in these tables?
- A dash means that account has no balance in that column. It is not a missing number that should be copied from the opposite side.
- Does this lesson reconstruct a suspense account?
- No. It corrects traceable copying and classification mistakes and explains agreement’s limits. Suspense-account work is a separate topic.
Continue with the Business Studies topical revision collection. Its resource contents require login. These are fictional worked cases, not official marking schemes or personal financial advice.
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