How are accounting policy changes handled under IAS 8?
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IAS 8 — Core Rule
Changes in accounting policies must be applied retrospectively to all periods presented unless an alternative treatment is permitted, requiring restatement of comparative figures and opening balances to ensure consistency and comparability across periods (IAS 8.19).
How IAS 8 Works
Recognition of policy change: An accounting policy change occurs only when the entity adopts a new accounting policy that differs from the previously applied policy. This includes initial adoption of an IFRS, changes mandated by new standards, and voluntary changes that result in financial statements that are more relevant without making them less reliable (IAS 8.14–15). Changes in accounting estimates (e.g., useful lives, provisions) are not policy changes and are handled prospectively (IAS 8.32–33).
Retrospective application requirement: When a policy change is adopted, the entity must adjust opening balances of all affected line items for the earliest prior period presented. All comparative figures (balance sheet, income statement, cash flows, equity) must be restated as if the new policy had always been in effect (IAS 8.22). This ensures like-for-like comparison across all periods shown.