Finding and Correcting Errors

Learning objectives

By the end of this chapter, you will be able to:

• Explain what a trial balance can (and cannot) tell you when checking double-entry records.
• Identify common errors that may still exist even when the trial balance agrees.
• Correct bookkeeping errors using journal entries (without using a suspense account).
• Analyse how errors affect profit and the statement of financial position.
• Distinguish between classification errors (including errors of principle) and settlement mispostings.

Overview & key concepts

Accurate records depend on two essentials:

1. Double-entry discipline(every transaction has equal debits and credits), and
2. Correct classification(the right accounts, in the right period).

A trial balance supports the first aim. It lists ledger balances to check whether total debits equal total credits. If totals agree, this suggests the ledgers are arithmetically consistent, but it does not prove that transactions have been recorded in the correct accounts or that everything has been recorded.

Finding and correcting errors is therefore a practical skill with two steps:

• Diagnosewhat was recorded versus what should have been recorded.
• Correctthe records by posting journals that move amounts to the right accounts while keeping double-entry intact.

Purpose and limitations of the trial balance

A trial balance is prepared at a point in time by extracting closing balances from ledger accounts.

What a balanced trial balance tells you

A balanced trial balance indicates that recorded debits and credits sum to the same total. This makes certain errors less likely (for example, one-sided postings), but it is not a guarantee of accuracy.

What a balanced trial balance does not tell you

The trial balance may still balance when:

• a transaction is posted to the wrong account (but still double-entry)
• a transaction is recorded in the wrong period
• the correct accounts are used but debits and credits are swapped (complete reversal)
• a transaction is omitted entirely (nothing posted at all)
• separate errors cancel each other out (compensating errors)
• the wrong amount is recorded in both the debit and credit (error of original entry)

Trial balance differences and suspense accounts

When a trial balance does not agree, some questions introduce a suspense account to hold the difference until the error is found. In this chapter, assume errors are identified and corrected directly, so no suspense account is needed.

Types of errors that may not affect trial balance agreement

The following errors commonly leave total debits equal total credits:

• Error of original entry: the wrong amount is used for both debit and credit.
• Error of omission: a transaction is not recorded at all.
• Error of commission: the correct category is used, but the wrong individual account.
• Error of principle (classification error): the transaction is posted to the wrong category of account.
• Compensating errors: independent errors that offset each other numerically.
• Complete reversal: correct accounts and amount, but debits and credits are swapped.

Correcting errors using journal entries

The “posted vs correct → adjustment journal” method

A reliable way to correct errors is to convert what was posted into what should have been posted, using the minimum journal needed.

1. Write the correct entry(what should have been posted).
2. Identify the posted entry(what was actually posted).
3. Compute the adjustment(posted → correct).
4. Post the correctionwith a clear narration.
5. State the impacton profit and on the statement of financial position.

A quick debit/credit movement test

Use this to sense-check correction journals:

• Assetsincrease with debits, decrease with credits.
• Liabilitiesincrease with credits, decrease with debits.
• Incomeincreases with credits.
• Expensesincrease with debits.
• Equityincreases with credits (distributions reduce equity, but are not expenses).

Errors of principle

Errors of principle arise when items are recorded in the wrong category of account.

A common source is confusion between:

• Capital expenditure: recorded as an asset because it supports benefits beyond the current period.
• Revenue expenditure: recorded as an expense because it relates to routine operations or maintenance.

Typical correction pattern (where a routine cost was wrongly capitalised):

Dr Relevant expense / Cr Relevant asset

Settlement mispostings

Settlement mispostings happen when cash receipts/payments are recorded against the wrong account.

Common patterns include:

• Customer receiptcredited to income instead of reducing trade receivables.
• Supplier paymentdebited to purchases instead of reducing trade payables.
• Cash paidbut cash/bank not credited (a payable is credited instead).

A key discipline is to decide whether cash/bank was posted correctly. If cash was already recorded correctly, the correction usually moves only the non-cash side.

Core theory and frameworks

A cycle-based error hunt

Work through records in business cycles, each with a control total that can be checked against evidence:

• Cash cycle: agree cash/bank ledger to the bank statement.
• Revenue cycle: match invoices to receivables, then match receipts to settlements.
• Purchases cycle: match supplier invoices to payables, then match payments to settlements.
• Inventory cycle: reconcile inventory records to counts and identify slow-moving/damaged items.
• Overheads cycle: review accruals and prepayments to ensure correct period cut-off.

Purchases and cost of sales

In bookkeeping systems, a “Purchases” account may be used as a working total. In published financial statements, purchases are normally reflected within cost of sales after inventory adjustments. Unless an inventory adjustment is given, assume no inventory adjustment and treat Purchases as the period charge. If opening and closing inventory figures are provided, adjust Purchases into Cost of sales accordingly.

Deferred income (unearned revenue)

If cash is received before goods or services are provided, the receipt is recognised as a liability until the performance occurs.

Disposals of PPE

In simple cases, the carrying amount may equal proceeds, so no gain or loss arises. In many questions, however, you must remove cost and accumulated depreciation as well as recognise the gain or loss. The principle remains:

Proceeds − carrying amount = gain/(loss)

Allowance for doubtful debts (loss allowance)

Receivables may not all be collected. A common approach is to set up a contra-receivable balance (often described as a loss allowance under an expected credit loss approach). At this level the mechanics are:

1. Increase the allowance required:
2. Dr Impairment loss / Cr Allowance for doubtful debts
3. Decrease the allowance required(required allowance falls):
4. Dr Allowance for doubtful debts / Cr Impairment loss
5. Write off a specific debt(where it has already been provided for):
6. Dr Allowance for doubtful debts / Cr Trade receivables:
7. This reduces receivables and the allowance withno further profit impactif the write-off is already covered by the allowance.

Worked mini-case: correcting settlement and classification errors (no suspense account)

Scenario

Ridgeway Services buys and sells goods on credit and also provides small service jobs. During February (USD), several entries were posted incorrectly. Unless stated otherwise, cash receipts/payments were posted to Cash/Bank as described.

Opening balances were nil except:

• PPE: Dr 5,000
• Capital: Cr 5,000

Correct postings made during the month:

• Credit sale of goods:USD 15,800
• Credit purchase of inventory:USD 7,100

Errors made during the month:

1. A customer paidUSD 4,200to settle an invoice; the credit was posted toRevenue – goods.
2. A customer paidUSD 500to settle an invoice; the credit was posted toOther income.
3. A payment to a supplier ofUSD 2,600(for earlier credit purchases) was debited toPurchases.
4. Repairs paidUSD 640were posted toPPE.
5. Insurance paidUSD 1,200was posted toPrepaid insurance, but it all relates to the current month.
6. Electricity paidUSD 900: the electricity expense debit was posted correctly, but the credit was posted toElectricity payableinstead of Cash/Bank (so Cash/Bank was not credited).
7. Old equipment was sold forUSD 5,000cash; the proceeds were credited toRevenue – goods. The carrying amount immediately before sale wasUSD 4,400.
8. Cash ofUSD 2,700was received in advance for services not yet provided; it was credited toRevenue – services.
9. A customer paidUSD 1,150to settle an invoice; the credit was posted toLoan payable.

Required

• (a) Prepare the correction journals for items 1–9 (no suspense account).
• (b) Calculate the net effect of the corrections on profit.
• (c) Prepare a corrected trial balance extract for the accounts affected.

Solution

Instruction: After each correction journal, state the profit effect (↑ / ↓ / none) and the main statement of financial position effect.

(a) Correction journals

1. Receipt credited to Revenue – goods (USD 4,200)

• Dr Revenue – goods 4,200
• Cr Trade receivables 4,200
• (Profit: ↓; SOFP: trade receivables ↓)

2. Receipt credited to Other income (USD 500)

• Dr Other income 500
• Cr Trade receivables 500
• (Profit: ↓; SOFP: trade receivables ↓)

3. Supplier payment debited to Purchases (USD 2,600)

• Dr Trade payables 2,600
• Cr Purchases 2,600
• (Profit: ↑; SOFP: trade payables ↓)

4. Repairs posted to PPE (USD 640)

• Dr Repairs expense 640
• Cr PPE 640
• (Profit: ↓; SOFP: PPE ↓)

5. Insurance posted to Prepaid insurance but relates to current month (USD 1,200)

• Dr Insurance expense 1,200
• Cr Prepaid insurance 1,200
• (Profit: ↓; SOFP: prepayment ↓)

6. Electricity paid but credited to Electricity payable (USD 900)

Electricity expense was already debited correctly; the correction fixes the credit leg because cash was missed.

• Dr Electricity payable 900
• Cr Cash/Bank 900
• (Profit: none; SOFP: cash ↓, accrual ↓)
• (Electricity payable here is an error-created accrual, not a normal supplier payable.)

7. Disposal proceeds credited to Revenue – goods (USD 5,000); carrying amount USD 4,400

Because Cash/Bank was already debited in the incorrect posting, the correction removes the incorrect credit to revenue and replaces it with derecognition of PPE and recognition of the gain.

• Dr Revenue – goods 5,000
• Cr PPE 4,400
• Cr Gain on disposal of PPE 600
• (Profit: ↓; SOFP: PPE ↓; cash unchanged in the correction because it was already debited in the original posting.)
• Net profit effect: revenue removed decreases profit by 5,000; gain recognised increases profit by 600; overall profit decreases by 4,400.

8. Advance receipt credited to Revenue – services (USD 2,700)

• Dr Revenue – services 2,700
• Cr Deferred income 2,700
• (Profit: ↓; SOFP: deferred income ↑)

9. Receipt credited to Loan payable (USD 1,150)

• Dr Loan payable 1,150
• Cr Trade receivables 1,150
• (Profit: none; SOFP: trade receivables ↓, loan payable ↓)

(b) Net effect on profit

Profit decreases (income removed / expenses recognised):

• Dr Revenue – goods: 4,200
• Dr Other income: 500
• Dr Repairs expense: 640
• Dr Insurance expense: 1,200
• Dr Revenue – goods: 5,000
• Dr Revenue – services: 2,700
• Total decreases =14,240

Profit increases (income recognised / expenses removed):

• Cr Purchases: 2,600
• Cr Gain on disposal of PPE: 600
• Total increases =3,200

Net decrease in profit = 14,240 − 3,200 = USD 11,040
So, before correction, profit was overstated by USD 11,040.

(c) Corrected trial balance extract (accounts affected)

Assumptions for this extract:

• Opening PPEDr 5,000and opening CapitalCr 5,000.
• Unless inventory information is provided, assume no inventory adjustment and treat Purchases as the period charge.

Debit balances (USD)

• Cash/Bank: 8,210
• Trade receivables: 9,950
• Purchases: 7,100
• Repairs expense: 640
• Insurance expense: 1,200
• Electricity expense: 900
• PPE: 600
• Total debits: 28,600

Credit balances (USD)

• Trade payables: 4,500
• Revenue – goods: 15,800
• Deferred income: 2,700
• Gain on disposal of PPE: 600
• Capital (opening): 5,000
• Total credits: 28,600

Control total checks:

• Trade receivables = 15,800 − (4,200 + 500 + 1,150) =9,950 Dr
• Trade payables = 7,100 − 2,600 =4,500 Cr

Common pitfalls and misunderstandings

• Assuming a balanced trial balance means the books are correct (it only supports arithmetic agreement).
• Treating receipts as income (many receipts are settlements of receivables).
• Treating payments as purchases/expenses (many payments are settlements of payables).
• Capitalising routine costs without evidence of future benefit beyond the current period.
• Reposting cash during corrections (first decide whether cash/bank was already recorded correctly).
• Misclassifying advance receipts as income instead of deferred income.
• Double-counting receivables impairment (writing off a debt covered by an allowance should not create a second expense).

Summary and further reading

A trial balance checks whether recorded debits and credits agree, but it cannot detect every error. Many misclassifications and omissions preserve double-entry and therefore leave totals balanced.

Strong performance in error-correction questions comes from:

• separatingperformance(income/expenses) fromsettlement(receivables/payables)
• using theposted vs correct → adjustment journalmethod
• stating the profit effect and statement of financial position effect of each correction
• treating purchases and inventory consistently, adjusting only when inventory information is provided

For further reading, consult introductory financial accounting texts covering revenue recognition, accruals/prepayments, PPE disposals (including cost and accumulated depreciation), and receivables impairment.

Glossary

Trial balance
A list of ledger account balances at a point in time, used to check whether total debits equal total credits.

Error of original entry
The wrong amount is recorded in both debit and credit entries.

Error of omission
A transaction is not recorded at all.

Error of commission
A transaction is recorded in the wrong individual account within the correct category.

Error of principle
A transaction is recorded in the wrong category of account.

Compensating error
Two or more errors that offset each other numerically so totals may agree while balances remain incorrect.

Complete reversal
Correct accounts and amount used, but debits and credits are swapped.

Deferred income (unearned revenue)
Cash received before goods or services are provided; treated as a liability until the performance occurs.

Allowance for doubtful debts (loss allowance)
A contra-receivable balance used to reflect expected shortfalls in collecting trade receivables.

Accounting equation
A core relationship in bookkeeping: Assets = Liabilities + Equity.