IAS 8
Active
Accounting Policies, Changes in Accounting Estimates and Errors
Prescribes the criteria for selecting and applying accounting policies, together with the accounting treatment and disclosure of changes in accounting policies, accounting estimates and prior period errors.
1
Conceptual Framework Linkage
Why IAS 8 is the Framework's "quality control" standard
The Conceptual Framework's qualitative characteristics – comparability, consistency, and faithful representation – are meaningless without rules governing WHEN and HOW an entity may change the policies used to prepare its numbers. IAS 8 is that rulebook.
HOW IAS 8 MAPS TO THE FRAMEWORK'S QUALITATIVE CHARACTERISTICS
Comparability – restricting voluntary policy changes to those producing more relevant/reliable information prevents opportunistic year-to-year manipulation of results Consistency – the same policies are applied to similar transactions across periods and across items within a period, unless a Standard permits otherwise Faithful representation – correcting prior period errors ensures financial statements do not perpetuate a materially misstated position
IAS 8 does not itself set RECOGNITION or MEASUREMENT rules – it governs the META-question of how an entity should select, apply, and change the policies that other standards' recognition/measurement rules operate within.
Why the three categories are measured differently
IAS 8's central technical distinction – retrospective restatement vs prospective application – flows directly from WHETHER new information reflects a correction of something that was always wrong, or a genuine, forward-looking change in circumstances/judgement.
CategoryTreatment basis
Change in accounting policyRetrospective – as if the new policy had always been applied
Change in accounting estimateProspective – from the period of change forward only
Prior period errorRetrospective restatement – as if the error had never occurred
Qualitative characteristics in action: prospective treatment for estimate changes reflects that new information about the FUTURE doesn't mean the past was wrong – restating history for a genuine change in judgement would itself be a faithful-representation failure.
2
Scope & Applicability
What IAS 8 covers
IAS 8 prescribes the criteria for selecting and changing accounting policies, together with the accounting treatment and disclosure of changes in accounting policies, changes in accounting estimates, and corrections of prior period errors – applicable to ALL entities preparing IFRS financial statements.
WHAT IS NOT A CHANGE IN ACCOUNTING POLICY
Applying an accounting policy for transactions/events that DIFFER in substance from those previously occurring Applying a new accounting policy for transactions/events that DID NOT OCCUR previously or were immaterial
This distinction matters enormously: a genuinely NEW transaction type simply adopts a policy for the first time (no retrospective restatement needed); only a change in the treatment of the SAME type of transaction is a "change in accounting policy."
Key definitions you must know
Accounting policies
The specific principles, bases, conventions, rules, and practices applied by an entity in preparing and presenting financial statements.
Change in accounting estimate
An adjustment of the carrying amount of an asset/liability, or the periodic consumption of an asset, resulting from the assessment of the present status of, and expected future benefits and obligations associated with, assets and liabilities. Results from new information or new developments – NOT a correction of an error.
Prior period errors
Omissions from, and misstatements in, an entity's financial statements for one or more prior periods arising from a failure to use, or misuse of, reliable information that was available and could reasonably be expected to have been obtained and taken into account when those statements were authorised for issue.
Retrospective application / restatement
Applying a new policy, or correcting an error, as if it had always applied/never occurred – adjusting the opening balance of each affected component of equity for the earliest prior period presented, and other comparative amounts.
3
Selecting & Applying Accounting Policies
The selection hierarchy
Where an IFRS Standard specifically applies to a transaction, the policy is determined by applying that Standard, considering any relevant Implementation Guidance. Where NO Standard specifically applies, management must use judgement to develop a policy that is relevant and reliable, applying the following hierarchy IN ORDER.
Step 1 – Mandatory sources
Requirements in other IFRS Standards dealing with similar/related issues, AND the Conceptual Framework's definitions, recognition criteria, and measurement concepts for assets, liabilities, income, and expenses.
Step 2 – May also consider
Pronouncements of other standard-setting bodies using a similar conceptual framework, other accounting literature, and accepted industry practices – ONLY if not in conflict with Step 1.
Step 1 is not optional or discretionary – the Conceptual Framework must be consulted, and requirements from OTHER, related IFRS Standards take priority over any outside literature. This ordering is one of the most frequently tested technical points in IAS 8.
4
Changes in Accounting Policies
When a voluntary change is permitted
A voluntary change in accounting policy is permitted ONLY if it is required by an IFRS Standard, OR results in the financial statements providing reliable and MORE RELEVANT information.
MANDATORY (NOT VOLUNTARY) CHANGES
Adoption of a new IFRS Standard is applied per that Standard's own specific transitional provisions; only in their absence does IAS 8's general retrospective rule apply by default.
RETROSPECTIVE APPLICATION MECHANICS
Adjust the opening balance of each affected component of equity for the EARLIEST prior period presented, and restate other comparative amounts as if the new policy had always applied
Worked example – change in inventory cost formula
Example 1: Changing from weighted average to FIFO
An entity changes its inventory cost formula from weighted average to FIFO on 1 January 20X3, because FIFO is judged to provide more relevant information given recent volatility in purchase prices. Under the old policy, retained earnings at 1 January 20X2 (the earliest comparative period presented) were $800,000. Under FIFO, they would have been $830,000. Profit for 20X2 under the old policy was $150,000; under FIFO it would have been $158,000.
Restated opening retained earnings at 1 Jan 20X2 = $830,000 (adjustment of +$30,000 to the earliest period presented)
20X2 comparative profit restated = $158,000 (not the original $150,000)
20X3 is then prepared going forward as if FIFO had always been the policy – no separate "catch-up" adjustment appears in 20X3 itself.
20X2 comparative profit restated = $158,000 (not the original $150,000)
20X3 is then prepared going forward as if FIFO had always been the policy – no separate "catch-up" adjustment appears in 20X3 itself.
If restating comparatives for 20X2 is impracticable, the cumulative adjustment is made to the opening balance of the EARLIEST period for which restatement IS practicable (Section 8) – potentially the current period itself.
5
Changes in Accounting Estimates
Prospective application mechanics
A change in estimate is recognised prospectively by including it in profit or loss in: (a) the period of change, if it affects that period only; or (b) the period of change AND future periods, if it affects both
COMMON EXAMPLES
Useful life or residual value of PPE/intangible assets Pattern of consumption of economic benefits (depreciation/amortisation method) Allowance for expected credit losses / doubtful receivables Provisions – warranty obligations, restructuring costs Fair value of financial assets/liabilities where no active market price exists
Worked example – change in useful life
Example 2: Machine useful life revised
A machine was purchased for $500,000, originally depreciated straight-line over 10 years (no residual value). After 4 years (carrying amount = 500,000 − 4×50,000 = $300,000), management revises the remaining useful life estimate to 3 more years (total 7 years, not 10) based on new information about wear patterns.
New annual depreciation = Remaining carrying amount ÷ Remaining useful life = 300,000 ÷ 3 = $100,000 p.a., starting in Year 5
NO adjustment is made to Years 1–4's depreciation already recognised – the change applies prospectively from the date of change only.
NO adjustment is made to Years 1–4's depreciation already recognised – the change applies prospectively from the date of change only.
Never restate prior periods for an estimate change – even if the effect is material. Retrospectively "correcting" a genuine change in estimate would misrepresent the information actually available to management at the time.
6
Prior Period Errors
Correction mechanics & worked example
Material prior period errors are corrected RETROSPECTIVELY in the first set of financial statements authorised for issue after discovery, by restating the comparative amounts for the prior period(s) presented, or if the error occurred before the earliest prior period presented, restating the opening balances of assets, liabilities, and equity for that earliest period.
Example 3: Overstated revenue discovered in a later period
During preparation of 20X3 financial statements, an entity discovers that revenue of $60,000 was incorrectly recognised in 20X2 for goods that had NOT yet been delivered to the customer at year end (a genuine error under IFRS 15, not a change in judgement). Retained earnings at 1 Jan 20X2 (before the error) were correctly $500,000. Income tax rate: 20%.
20X2 comparative figures restated: revenue reduced by $60,000; profit reduced by 60,000 × (1 − 0.20) = $48,000 net of tax
Restated retained earnings, 1 Jan 20X3 (= restated closing 20X2) = original closing balance − $48,000
A THIRD statement of financial position (at 1 Jan 20X2) is required under IAS 1 only if the error relates to periods BEFORE the earliest comparative period presented – here it does not, so only the 20X2 comparative SOFP and SOPL are restated.
Restated retained earnings, 1 Jan 20X3 (= restated closing 20X2) = original closing balance − $48,000
A THIRD statement of financial position (at 1 Jan 20X2) is required under IAS 1 only if the error relates to periods BEFORE the earliest comparative period presented – here it does not, so only the 20X2 comparative SOFP and SOPL are restated.
7
The Three Treatments – Side-by-Side Comparison
Quick-reference comparison table
FeaturePolicy changeEstimate changeError correction
TriggerNew info makes an existing policy less relevant, or new Standard requires itNew info/developments about future economic benefitsReliable information available but not used/misused
TreatmentRetrospectiveProspectiveRetrospective restatement
Comparatives restated?YesNoYes
Third SOFP possible?Yes, if materialNo – neverYes, if material and pre-dates earliest comparative
Typical exampleInventory cost formula, presentation formatUseful life, ECL allowance, warranty provisionArithmetical mistake, misapplication of a policy, fraud, oversight
The classic exam trap: when it is difficult to distinguish a change in policy from a change in estimate, the change is treated AS a change in accounting estimate – the default always favours the less disruptive, prospective treatment.
8
Impracticability Exemption
When retrospective treatment is not required
Retrospective application/restatement is NOT required when it is impracticable to determine either the period-specific effects, or the cumulative effect, of the change/error.
A REQUIREMENT IS IMPRACTICABLE WHEN
The effects of retrospective application/restatement are not determinable Retrospective application/restatement requires assumptions about what management's intent would have been in that prior period Retrospective application/restatement requires significant estimates, and it is impossible to distinguish objectively information about those estimates that would have been available at the time from information that became available LATER (hindsight)
Fallback approach when impracticable
If restating comparatives for one or more prior periods is impracticable, apply the new policy/correct the error prospectively from the EARLIEST date practicable If determining the CUMULATIVE effect at the start of the current period is impracticable, adjust comparatives prospectively from the earliest date practicable – potentially the current period itself
The "use of hindsight" prohibition is a critical safeguard – an entity cannot justify a retrospective adjustment using information that genuinely only became known/knowable after the prior period ended.
9
Disclosure Requirements
Required disclosures by category
CHANGE IN ACCOUNTING POLICY
Nature of the change; reasons why the new policy provides more reliable/relevant information (voluntary changes) For each period presented, the amount of the adjustment for each financial statement line item affected, and EPS if applicable Amount of the adjustment relating to periods before those presented, to the extent practicable
CHANGE IN ESTIMATE & ERROR CORRECTION
Nature and amount of a change in estimate that has an effect in the current period, or is expected to have an effect in future periods For prior period errors: nature of the error, and for each period presented, the amount of correction for each line item affected and EPS Amount of the correction at the beginning of the earliest prior period presented
10
Critical Judgments & Estimates
Where management judgement matters most
SIGNIFICANT JUDGEMENTS
Distinguishing a change in accounting policy from a change in accounting estimate (defaults to estimate when genuinely unclear) Whether new information reflects a genuine error (should have been known/available) versus a legitimate change in estimate based on new developments Whether retrospective restatement is genuinely impracticable, and to what extent hindsight would need to be used
SIGNIFICANT ESTIMATES
The cumulative financial effect of a restatement, when full period-by-period data is unavailable The materiality threshold applied in determining whether an error requires correction at all
Fraud, deliberate misstatement, and simple oversight are ALL treated identically as "prior period errors" under IAS 8 – the standard does not distinguish by cause or intent; only the RESULT (a misstatement using information that was or should have been available) matters for accounting purposes.
11
IFRS vs US GAAP – Key Differences
Comparison – IAS 8 vs US GAAP (ASC 250)
FeatureIFRS (IAS 8)US GAAP
Accounting policy selection hierarchyMandatory: other IFRS Standards, then the Conceptual Framework, before other literatureFASB Accounting Standards Codification is the single source of authoritative GAAP – no equivalent tiered hierarchy needed
Voluntary policy changesPermitted if the new policy provides more relevant and reliable informationPermitted only if the new policy is "preferable," with a similar underlying rationale
Error correctionRetrospective restatementAlso retrospective restatement – largely converged
Change in estimateProspectiveAlso prospective – largely converged
Materiality error correction – prior "rollover" methodNot used – always retrospective if materialHistorically some entities used non-GAAP "rollover"/"iron curtain" quantification approaches for immaterial items, now largely restricted by SEC guidance (SAB 108)
IAS 8 and its US GAAP counterpart are among the more converged pairs of standards – the retrospective/prospective distinctions are conceptually aligned, with the main practical difference lying in the source-hierarchy for developing policies where no specific standard exists.
12
Statement Mapping – Where Every IAS 8 Event Lands
Comprehensive event-to-statement mapping table
Event / transactionStatement(s) affectedNotes
Change in accounting policy – cumulative adjustmentEquity SOFPOpening retained earnings of earliest period restated
Change in accounting policy – comparative period impactSOPL SOFPPrior period comparatives restated as if always applied
Change in accounting estimate – current/future impactSOPL SOFPRecognised prospectively; NO restatement of prior periods
Prior period error – comparative restatementSOPL SOFP EquityPrior period figures restated as if error never occurred
Error pre-dating earliest comparative periodSOFP EquityOpening balances of earliest period restated; may trigger third SOFP (IAS 1)
Impracticable restatement – prospective fallback appliedSOPLApplied from the earliest date practicable instead
Cumulative effect of non-cash accounting adjustmentsCash Flow StatementNo actual cash impact; comparatives in the cash flow statement also restated where relevant
Nature, amount, and reasons for changes/errorsNotesMandatory disclosure for all three categories
13
Related Standards – Cross-Reference Map
How IAS 8 connects across the IFRS body of literature
StandardNature of the connection
IAS 1Determines when a "third statement of financial position" is required as a consequence of retrospective application, restatement, or reclassification under IAS 8
IAS 12Deferred tax consequences must be recalculated and restated alongside any retrospective policy change or error correction affecting temporary differences
IAS 33Restated EPS figures for each period presented must accompany retrospective adjustments, since EPS is highly comparability-sensitive
IAS 10Interacts in determining whether an item discovered after year end is an adjusting event (often converging with error correction) or requires separate non-adjusting disclosure
IAS 16 / IAS 38Supply the classic examples of "changes in estimate" – useful life, residual value, depreciation/amortisation method revisions
IAS 37Changes in provision estimates (e.g. revised probability or amount of an obligation) are treated as changes in accounting estimate under IAS 8's framework
IFRS 9Revisions to expected credit loss estimates are treated as changes in accounting estimate, applied prospectively
All other StandardsIAS 8's selection hierarchy (Step 1) requires consulting related Standards FIRST whenever a transaction has no directly applicable Standard of its own
14
Quick-Reference Glossary
Retrospective application
Applying a NEW accounting policy to transactions/events as if that policy had always been applied.
Retrospective restatement
CORRECTING the recognition, measurement, and disclosure of amounts in financial statements as if a prior period error had never occurred.
Prospective application
Applying a new accounting policy, or recognising the effect of a change in estimate, to transactions/events occurring AFTER the date the policy is changed / estimate is revised.
Impracticable
A requirement is impracticable when the entity cannot apply it after making every reasonable effort – the exemption threshold that allows a prospective fallback instead of full retrospective treatment.
Material
Errors, omissions, or misstatements are material if they could, individually or collectively, influence the economic decisions of users based on the financial statements.
IFRS Standards
Standards and Interpretations adopted by the IASB, comprising IFRS Standards, IAS Standards, and Interpretations developed by the IFRS Interpretations Committee / former SIC.
Financial statement key
BS Balance sheet
IS Income statement
SE Statement of changes in equity
OCI Other comprehensive income
SCF Statement of cash flows
History & Development
Oct-1976
Exposure Draft E8 The Treatment in the Income Statement of Unusual Items and Changes in Accounting Estimates and Accounting Policies
Feb-1978
IAS 8 Unusual and Prior Period Items and Changes in Accounting Policies
Jul-1992
Exposure Draft E46 Extraordinary Items, Fundamental Errors and Changes in Accounting Policies
Dec-1993
IAS 8 (1993) Net Profit or Loss for the Period, Fundamental Errors and Changes in Accounting Policies (revised as part of the 'Comparability of Financial Statements' project)
Effective for annual periods beginning on or after 1 January 1995
18-Dec-2003
Revised version of IAS 8 issued by the IASB
Effective for annual periods beginning on or after 1 January 2005
31-Oct-2018
Amended by Definition of Material (Amendments to IAS 1 and IAS 8)
Effective for annual periods beginning on or after 1 January 2020
12-Feb-2021
Amended by Definition of Accounting Estimates (Amendments to IAS 8)
Effective for annual periods beginning on or after 1 January 2023. An entity needs to apply the amendments to changes in accounting estimates and changes in accounting policies that occur on or after the beginning of the first annual reporting period in which it applies the amendments.
09-Apr-2024
IAS 8 (2005) will be superseded by IAS 8 (2024) Basis of Preparation of Financial Statements when an entity applies IFRS 18 Presentation and Disclosure in Financial Statements
Effective for annual periods beginning on or after 1 January 2027, with earlier application permitted