Explain how error corrections affect the financial statements
Trace each correction to profit, assets, liabilities and equity instead of assuming every trial-balance error changes profit.
Cambridge International AS & A Level Accounting 9706, 2026–2028 syllabus, Version 2. These lessons cover Topic 1.4 only. Practice is self-checked, not an official Cambridge grade; the separately published 2029 syllabus, timed papers and human subject-teacher review remain outstanding.
Before you begin
- Use double-entry, ledger and trial-balance knowledge from Topic 1.2. Reconciliations compare records with independent or separately maintained evidence; an unexplained difference needs investigation.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
If an income item is omitted from both sides of the ledger, can a trial balance still agree?
What you will learn
- Calculate the net effect of errors on reported profit and financial position
- Distinguish errors that affect profit from reclassifications
- Evaluate the limitations of the trial balance
Follow the original and corrected accounts
An omitted expense can overstate profit and understate a payable. A capital purchase wrongly charged as an expense can understate profit and non-current assets. A wrong account may change classification without changing total profit, depending on which accounts were used.
Calculate the effect from the actual error and its correction. Check whether an expense, income, asset or liability changes, and whether the change affects current-period profit or only classification. Do not assume that every error that changes a trial balance has a profit effect.
Agreement is not a complete financial-statement check
A trial balance helps check arithmetic agreement and provides balances for drafting statements. It does not identify omitted transactions, all wrong-account entries, incorrect accounting treatment, cut-off errors or unsupported transactions when both sides still balance.
Reconciliation, source-document checks and review of unusual balances provide different evidence. Together they reduce risk but do not guarantee that every statement is free from error.
Pause and explain
A $600 office expense is wrongly debited to motor expenses. What is the likely effect on total profit before correction, assuming both are expenses?
Worked example
A $900 annual insurance payment was correctly credited to bank but wrongly debited to equipment instead of insurance expense. What is the correction and the effect before correction?
Show the worked solution
- The wrong debit has overstated equipment by $900 and omitted $900 of expense.
- The correction is debit insurance expense $900 and credit equipment $900.
- Before correction, profit is overstated by $900 and non-current assets are overstated by $900.
Answer Dr Insurance expense $900; Cr Equipment $900. Before correction, profit and non-current assets were each overstated by $900.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A $1,100 credit electricity bill is omitted entirely. State the correction and its effect on profit, liabilities and trial-balance agreement before correction.
Give me a hint
The missing bill needs an expense debit and a payable credit.
Compare my reasoning
- Debit electricity expense $1,100 and credit trade payables $1,100.
- Before correction, expense and payables are understated by $1,100.
- Profit is overstated by $1,100, but the trial balance may still agree because both sides were omitted.
Dr Electricity expense $1,100; Cr Trade payables $1,100. Before correction, profit is overstated and payables understated by $1,100; the trial balance may still agree.
Look for these in your work
- Double entry correct
- Profit direction correct
- Agreement limitation stated
A $750 repair is wrongly recorded as a non-current asset. Calculate the correction and likely pre-correction effect on profit and assets.
Give me a hint
Move the cost from the asset account to the current-period expense.
Compare my reasoning
- Debit repairs expense $750.
- Credit the non-current asset $750.
- Before correction, profit and non-current assets are each overstated by $750.
Dr Repairs expense $750; Cr Non-current asset $750. Before correction, profit and assets are overstated by $750.
Look for these in your work
- Correct accounts selected
- Amount correct
- Effects stated
A trial balance agrees and a business owner concludes that cut-off and classification must be correct. Explain why this conclusion is unsafe and name two relevant checks.
Give me a hint
A balanced trial balance can contain equal wrong or missing entries.
Compare my reasoning
- Errors of omission, commission, principle, original entry, reversal and compensating errors may preserve agreement.
- Check source documents around year-end for cut-off and compare balances with external statements or independent records.
- Inspect unusual expense, asset and liability classifications and follow up unexplained balances.
Agreement is only an arithmetic check. Review documents and transaction dates around year-end, reconcile ledger balances to external statements, and inspect classification; each tests a different risk.
Look for these in your work
- Trial-balance limit explained
- Two checks named
- Risks distinguished
Common mistakes
- Saying an expense error affects only profit when a payable is also wrong
- Assuming every wrong account changes total profit
- Treating trial-balance agreement as evidence that cut-off is correct
What can you explain now?
A capital purchase is wrongly charged to repairs expense. What is the likely effect before correction?
Compare with the explanation
Profit and non-current assets are understated
The asset is omitted and an expense is overstated.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Give one correction that changes profit and one that may only reclassify an expense.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.