Under IAS 21, what triggers a change in an entity's functional currency, and how is the transition accounted for?

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AcadiFi · Accepted Answer

IAS 21 defines functional currency as the currency of the primary economic environment in which the entity operates. A change is rare, but when the underlying economic facts and circumstances shift, the entity must change its functional currency. Here is how it works. **When Does a Change Occur?** A change is triggered when the **primary economic environment** shifts. IAS 21 lists indicators grouped into primary and secondary categories: **Primary Indicators (most weight):** - Currency that mainly influences **sales prices** for goods and services - Currency of the country whose **competitive forces and regulations** mainly determine prices **Secondary Indicators:** - Currency that mainly influences **labor, materials, and other production costs** - Currency in which **financing activities** generate funds (debt, equity) - Currency in which **operating receipts** are usually retained **Worked Example — Verona Textiles (Colombian Subsidiary):** Verona's Colombian subsidiary historically operated in Colombian pesos — local sales, local suppliers, peso-denominated debt. Over 18 months, the business transformed: | Indicator | Before | After | |---|---|---| | Sales currency | 85% COP | 75% USD (export contracts) | | Supplier payments | 90% COP | 60% USD (imported raw materials) | | Financing | COP bank loans | USD intercompany loan from parent | | Cash retained in | COP accounts | USD accounts | Management concludes the functional currency has changed from COP to USD effective January 1, 2026. **Accounting for the Change — Prospective Application** The change is applied **prospectively** from the date of change. This is critical — there is **no restatement** of prior periods. 1. All assets and liabilities are **translated into the new functional currency at the exchange rate on the date of change**. These translated amounts become the new historical cost basis. 2. Non-monetary assets translated at the date-of-change rate are NOT remeasured again — the translated amount is the deemed cost going forward. 3. Cumulative translation adjustments previously recognized in **OCI** from translating the entity into a different presentation currency remain in equity and are **not reclassified** to profit or loss until disposal of the entity. \`\`\`mermaid flowchart TD A["Economic Environment
Shifts"] --> B["Reassess Primary
& Secondary Indicators"] B --> C{"Functional Currency
Changed?"} C -->|"Yes"| D["Translate All Items at
Date-of-Change Rate"] D --> E["New Translated Amounts
= Deemed Cost"] D --> F["Prior OCI CTA
Remains in Equity"] C -->|"No"| G["Continue Current
Functional Currency"] E --> H["Prospective Only —
No Restatement"] \`\`\` **Exam Alerts:** 1. The change is a **change in fact**, not a change in accounting policy — no retrospective application. 2. Translated amounts at the change date become the new cost basis — subsequent depreciation is based on these amounts. 3. If the entity has a different presentation currency, the CTA accumulated before the change stays in equity. 4. Management cannot simply choose to change functional currency — objective economic evidence is required. Learn the full IAS 21 framework in our CFA Level II FRA course.

Under IAS 21, what triggers a change in an entity's functional currency, and how is the transition accounted for?

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