9.5 IAS 8 Accounting Policies, Estimates and Errors, and Disclosing Material Items
Key Takeaways
- IFRS 18 renamed IAS 8 to Basis of Preparation of Financial Statements and moved the fair presentation, going concern and accrual basis requirements into it from IAS 1.
- A change in accounting policy is applied retrospectively, restating comparatives and the opening balance of each affected component of equity for the earliest period presented.
- A change in accounting estimate is applied prospectively in the period of change and future periods, and never restates a comparative.
- Material prior period errors are corrected retrospectively, never through the current period's profit or loss.
- Where a change cannot be distinguished between a change in policy and a change in estimate, it is treated as a change in estimate.
9.5 IAS 8 Accounting Policies, Estimates and Errors, and Disclosing Material Items
A standard that changed its name. Until the consequential amendments made by IFRS 18, this standard was called IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. It is now IAS 8 Basis of Preparation of Financial Statements, because IFRS 18 moved into it the requirements previously in IAS 1 on fair presentation and compliance with IFRS Accounting Standards, going concern, the accrual basis of accounting, and the disclosure of an entity's selection and application of accounting policies. The substance of the policies, estimates and errors material is unchanged; the title and the scope are wider. Use the current name in the exam.
1. Selecting an Accounting Policy
Accounting policies are the specific principles, bases, conventions, rules and practices applied by an entity in preparing and presenting financial statements. They are not optional preferences: where an IFRS Accounting Standard applies to a transaction, that standard determines the policy.
Where no standard specifically applies, management must use judgement to develop a policy that results in information that is relevant to users' economic decision-making needs and reliable — faithfully representative, reflecting economic substance, neutral, prudent and complete. In doing so it refers, in descending order, to:
1. The requirements in IFRS Accounting Standards dealing with SIMILAR and
RELATED issues;
2. The definitions, recognition criteria and measurement concepts in the
CONCEPTUAL FRAMEWORK for Financial Reporting;
3. (May also consider) the most recent pronouncements of OTHER STANDARD-
SETTING BODIES that use a similar conceptual framework, other
accounting literature and accepted industry practices, to the extent
these do not conflict with 1 and 2.
Policies are applied consistently for similar transactions unless a standard specifically requires or permits categorisation with different policies.
2. The Three Mechanisms, Side by Side
This table is the whole section in miniature. Learn it.
| Change in accounting POLICY | Change in accounting ESTIMATE | Prior period ERROR | |
|---|---|---|---|
| What it is | A change in the basis of measurement, recognition or presentation | A revision of the carrying amount of an asset or liability resulting from new information or developments | An omission from, or misstatement in, prior period financial statements arising from a failure to use, or misuse of, reliable information that was available |
| When permitted | Only if required by an IFRS Accounting Standard, or if it results in reliable and more relevant information | Whenever new information or developments warrant it — no permission needed | Not a choice; must be corrected |
| Treatment | RETROSPECTIVE | PROSPECTIVE | RETROSPECTIVE RESTATEMENT |
| Comparatives | Restated | Never restated | Restated |
| Opening equity | Adjusted for the earliest period presented | Unaffected | Adjusted for the earliest period presented |
| Current year P/L | Reflects the new policy | Absorbs the full effect of the revision | Never includes the error correction |
| Examples | Moving from the cost model to the revaluation model for PPE; changing from FIFO to weighted average cost | Revising the useful life or residual value of an asset; revising an allowance for expected credit losses or a warranty provision | Arithmetic mistakes, misapplication of a standard, oversights, misinterpretation of facts, fraud |
[!CAUTION] Where a change is difficult to distinguish, IAS 8 requires it to be treated as a change in ACCOUNTING ESTIMATE. This default is examined regularly, and it matters, because the prospective treatment is far less disruptive than a retrospective restatement.
The practical distinction that catches candidates
Changing the depreciation method — say from reducing balance to straight line — is a change in accounting estimate, not a change in accounting policy, because the method is the estimation technique used to consume the asset's economic benefits. The policy is the decision to depreciate the asset over its useful life; the method is an estimation input. The effect goes through the current and future periods and the comparative is untouched.
Impracticability
Retrospective application or restatement is required except to the extent that it is impracticable to determine either the period-specific effects or the cumulative effect. Impracticable means the entity cannot apply the requirement after making every reasonable effort — a genuinely high hurdle, not an inconvenience.
3. How Each One Lands in the Financial Statements
CHANGE IN POLICY / PRIOR PERIOD ERROR (retrospective)
+------------------------------------------------------------------+
| STATEMENT OF CHANGES IN EQUITY |
| Balance at 1 January 20X5 as previously reported X |
| Prior period adjustment (X) |
| Balance at 1 January 20X5 as RESTATED X |
+------------------------------------------------------------------+
| COMPARATIVE STATEMENT OF PROFIT OR LOSS -- every affected line |
| is restated |
+------------------------------------------------------------------+
| CURRENT YEAR PROFIT OR LOSS -- contains NOTHING in respect of |
| the prior period |
+------------------------------------------------------------------+
CHANGE IN ESTIMATE (prospective)
+------------------------------------------------------------------+
| COMPARATIVES -- untouched |
| OPENING EQUITY -- untouched |
| CURRENT YEAR PROFIT OR LOSS -- absorbs the entire effect, in the |
| same line item the original estimate affected |
+------------------------------------------------------------------+
4. Disclosing Material Items of Income and Expense
The FR syllabus asks you to indicate the circumstances where separate disclosure of material items of income and expense is required. Under IFRS 18 this is handled through the aggregation and disaggregation principles introduced in section 2.2 rather than by a list of named categories.
The rule is one of shared characteristics: items are aggregated only where they share characteristics, and are disaggregated where they do not. An item that is material by size or by nature and that does not share characteristics with the line it would otherwise sit in must be shown separately, either on the face of the primary statement or in the notes.
Items that commonly require separate disclosure in an FR scenario:
| Item | Why it is usually disaggregated |
|---|---|
| Write-downs of inventories to net realisable value, and reversals | Does not share the characteristics of routine cost of sales |
| Impairment losses on property, plant and equipment or goodwill, and reversals | A goodwill impairment shares nothing with general administrative expenses |
| Restructuring costs and reversals of restructuring provisions | Non-recurring in nature, though still an operating expense |
| Disposals of items of property, plant and equipment and of investments | Different in nature from trading income |
| Litigation settlements | Material by nature even when modest in size |
| Reversals of provisions | Reversing a credit through an expense line obscures both |
Two rules that sit alongside this:
- There is no "extraordinary items" caption. IFRS Accounting Standards do not permit items of income or expense to be presented as extraordinary, in the primary statements or in the notes. An item can be material, non-recurring and separately disclosed, but never "extraordinary".
- Where operating expenses are presented by function, IFRS 18 requires a note disaggregating specified expenses by nature — including depreciation, amortisation, employee benefits, impairment losses and reversals, and write-downs of inventories and reversals.
[!TIP] In the exam, the scenario usually tells you. The FR examining team's guidance is explicit that where an operating expense is to be disaggregated, the scenario will say so, and credit is awarded for following that instruction. Failing to present the named item separately loses the mark even where the arithmetic is perfect.
5. Worked Example: Three Adjustments, Three Different Treatments
Scenario — Ravensworth plc, year ended 31 December 20X6
Draft profit for the year ended 31 December 20X6 is $2,400,000; the reported profit for 20X5 was $1,900,000; retained earnings at 1 January 20X5 as previously reported were $6,300,000. The tax rate throughout is 20%. Three matters are outstanding.
(a) Ravensworth has decided to change its measurement of its head office from the cost model to the revaluation model under IAS 16, because directors believe current values give more relevant information. The revaluation is effected at 31 December 20X6.
(b) A delivery fleet acquired on 1 January 20X3 for $1,800,000 was being depreciated over nine years to a nil residual value. On 1 January 20X6 the fleet manager's review concluded that the remaining useful life from that date is four years and the residual value is $200,000.
(c) Closing inventory at 31 December 20X5 was overstated by $150,000 because a stock sheet was added up incorrectly. The error is material.
Analysis
(a) Change in accounting policy — but a special one. A move from the cost model to the revaluation model is a change in accounting policy. However, IAS 16 and IAS 38 contain a specific exception: a change to a revaluation model is dealt with in accordance with those standards, that is, prospectively as a revaluation, and not by retrospective restatement under IAS 8. The revaluation surplus is recognised in other comprehensive income at 31 December 20X6 and comparatives are untouched.
This is the exception that examiners most enjoy setting, because candidates who have learned "policy change equals retrospective restatement" apply the general rule and restate three years of depreciation for nothing.
(b) Change in accounting estimate — prospective.
Original annual charge: $1,800,000 / 9 years = $200,000
Accumulated depreciation to 31 December 20X5 (3 years) = $600,000
Carrying amount at 1 January 20X6 = $1,200,000
Revised charge from 20X6: ($1,200,000 - $200,000) / 4 years = $250,000
Effect: an ADDITIONAL $50,000 charged in 20X6 and in each of 20X7-20X9.
Comparatives: UNCHANGED. Opening equity: UNCHANGED.
Draft profit falls by $50,000.
(c) Prior period error — retrospective restatement. Closing inventory in 20X5 was overstated, so 20X5 cost of sales was understated and 20X5 profit was overstated. The opening inventory of 20X6 was correspondingly overstated, so 20X6 cost of sales is overstated and 20X6 profit is understated by the same amount — the error reverses.
Gross error $150,000
Tax effect at 20% ($30,000)
Net-of-tax restatement $120,000
20X5 comparative profit: $1,900,000 - $120,000 = $1,780,000 (restated)
20X6 draft profit: increased by $120,000, because the overstated opening
inventory has depressed the current year's figure
Current year profit or loss: contains NO prior period adjustment
Revised figures
20X6 profit: $2,400,000 - $50,000 (estimate change) + $120,000 (error reversal) = $2,470,000
20X5 profit: $1,900,000 - $120,000 = $1,780,000 (restated)
Presentation in the statement of changes in equity
RAVENSWORTH PLC -- STATEMENT OF CHANGES IN EQUITY (retained earnings column, extract)
$
Balance at 1 January 20X5, as previously reported 6,300,000
Prior period adjustment (correction of inventory error) --
Balance at 1 January 20X5, as restated 6,300,000
Profit for the year ended 31 December 20X5, as restated 1,780,000
Balance at 31 December 20X5, as restated 8,080,000
Profit for the year ended 31 December 20X6 2,470,000
Balance at 31 December 20X6 10,550,000
The 1 January 20X5 opening balance requires no adjustment because the error arose in the year ended 31 December 20X5, which is within the comparative period presented. Had the error originated in 20X4 or earlier, the opening balance at 1 January 20X5 would have been restated instead.
6. Common Exam Traps
[!WARNING] Trap 1: Putting a prior period adjustment through this year's profit or loss. The correction belongs in the statement of changes in equity and in the restated comparative. It never appears as a current-year expense or income.
[!WARNING] Trap 2: Restating comparatives for a change in estimate. A revised useful life, residual value, allowance or provision estimate is prospective. Restating last year is wrong and costs presentation marks.
[!WARNING] Trap 3: Applying retrospective restatement to a first revaluation. A change to the revaluation model is handled under IAS 16 or IAS 38 as a revaluation, not under the IAS 8 retrospective mechanism.
[!WARNING] Trap 4: Forgetting that an inventory error self-corrects. An overstated closing inventory in one year becomes an overstated opening inventory in the next, so the profit effect reverses. Both years move, in opposite directions, by the same net-of-tax amount.
[!TIP] Ask two questions in order. First: has the entity changed what it measures or how it presents (policy) or the numerical inputs to an existing measurement (estimate)? Second: was reliable information available at the time that should have been used (error)? If the answer to the first question is genuinely unclear, IAS 8 tells you to call it an estimate.
Bellerby Co has reviewed its delivery vehicles and concluded that their remaining useful lives are shorter than previously assumed and that the residual values should be reduced. How should Bellerby account for this in the financial statements for the current year?
In January 20X7, while preparing the financial statements for the year ended 31 December 20X6, Wensley Co discovered that a material repair costing $400,000 had been wrongly capitalised as part of a building in the year ended 31 December 20X5. The building is depreciated over 40 years and the tax rate is 25%. Which statement correctly describes the treatment?
Under IFRS 18, when must an entity present a material item of income or expense separately rather than aggregating it within a larger line item?