Last reviewed: July 2026.
Accounting errors are mistakes or omissions in recording, classifying, posting, measuring or presenting transactions. Some errors make the trial balance disagree; others leave total debits equal to total credits and can remain hidden until an account is reconciled or a financial statement is reviewed.
A balanced trial balance is therefore not proof that the accounting records are correct. Effective error correction starts by comparing what should have been recorded with what was actually recorded, preparing the correcting journal, and confirming that related ledgers and reports are updated.
Common types of accounting errors
| Error type | What happened | Trial balance effect | Typical correction |
|---|---|---|---|
| Complete omission | The transaction was not recorded. | Usually none. | Record the missing double entry. |
| Error of commission | Correct type of account, wrong individual account. | Usually none. | Transfer the amount between the affected accounts. |
| Error of principle | Wrong class of account, such as capital expenditure treated as an expense. | Usually none. | Reverse the wrong classification and record the correct one. |
| Reversal of entries | The correct accounts were used on the wrong sides. | Usually none. | Reverse twice the recorded amount to reach the correct balances. |
| Original-entry error | The same wrong amount was entered on both sides. | Usually none. | Correct the difference in both affected accounts. |
| One-sided or unequal posting | Only one side, or different amounts, were posted. | Creates a difference. | Use or clear a suspense account while investigating. |
| Compensating errors | Two unrelated errors offset each other. | May still balance. | Correct each error separately. |
Errors that do not affect the trial balance
Complete omissions, errors of commission, errors of principle, reversals and equal original-entry errors often preserve double-entry equality. For example, recording equipment repairs as equipment cost debits an account and credits cash correctly, so the trial balance balances even though profit and assets are misstated.
These errors are commonly found through reconciliations, analytical review, supporting documents, tax checks and management review rather than through the trial balance total alone.
Errors that create a suspense balance
A suspense account is a temporary holding account used when the correct destination of an amount is not yet known or when a difference must be investigated. In a modern computerised system, unbalanced journals may be blocked; the bookkeeper may deliberately post the uncertain side to suspense until evidence is obtained.
Suspense must not become a permanent dumping account. Every balance should have an owner, supporting evidence, a review date and an approved clearing entry.
A reliable correction method
- Describe the transaction using the source document.
- Write the correct double entry.
- Write the entry that was actually posted.
- Compare the two and calculate the net correction.
- Identify whether suspense is involved.
- Post an authorised correcting journal with a clear narration.
- Reperform affected reconciliations and review the financial-statement impact.
Worked example: a sales return recorded as a sale
A credit sales return of 900 CU should have been recorded as:
- Debit sales returns 900 CU
- Credit trade receivables 900 CU
Instead, a sales invoice was entered:
- Debit trade receivables 900 CU
- Credit revenue 900 CU
Trade receivables are therefore overstated by 1,800 CU: they should have decreased by 900 CU but increased by 900 CU. Revenue is overstated by 900 CU and sales returns are understated by 900 CU. The correction is:
- Debit revenue 900 CU
- Debit sales returns 900 CU
- Credit trade receivables 1,800 CU
No suspense account is needed because both the wrong and correcting entries balance.
Worked example: one-sided bank charge
Suppose a bank charge of 120 CU appears on the bank statement but was omitted from the ledger. The correction is:
- Debit bank charges expense 120 CU
- Credit bank 120 CU
This is a complete omission. It affects profit and the bank balance but would not have caused the original trial balance to disagree.
Prior-period errors under IAS 8
IAS 8 distinguishes errors from changes in estimates. An error arises from failure to use, or misuse of, reliable information that was available when the statements were authorised. A change caused by new information is generally an estimate change, not an error.
Material prior-period errors are normally corrected retrospectively by restating comparative amounts, unless retrospective correction is impracticable. Current-period bookkeeping errors discovered before statements are issued are corrected in the current records.
Materiality and financial-statement impact
Not every small error requires the same response, but materiality is not a permission to ignore known problems. Consider amount, nature, cumulative effect, regulatory consequences, management incentives and whether an error changes a trend, covenant or reported profit.
Read the detailed guide to materiality in accounting and the article on accounting policies, estimates and errors.
Error-prevention controls
- authorised source documents and master-data changes;
- restricted journal access and independent approval;
- bank, supplier, customer and control-account reconciliations;
- automated validation and duplicate-invoice checks;
- exception reports and unusual-entry analysis;
- period-end cut-off and ledger reviews;
- documented suspense-account ageing and clearance.
The control accounts guide, bank reconciliation guide and trial balance worked example explain key detection procedures.
Common correction mistakes
- correcting only half of a reversed or duplicated entry;
- posting a plug to suspense without investigating the cause;
- changing a closed prior period without assessing IAS 8;
- ignoring tax, inventory, receivable or depreciation consequences;
- deleting audit evidence instead of using a transparent journal;
- assuming a balanced trial balance means the problem is solved.
Key takeaway
Accounting error correction is a controlled process, not a balancing exercise. Identify the intended entry, compare it with the actual posting, correct every affected account, clear suspense with evidence, and assess whether the error is material or belongs to a prior reporting period.
Official references: ACCA Suspense Accounts and Error Correction and IAS 8 Basis of Preparation of Financial Statements.