IAS 21
Active
The Effects of Changes in Foreign Exchange Rates
Prescribes the accounting treatment for foreign currency transactions, foreign operations and the translation of financial statements into a presentation currency.
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Conceptual Framework Linkage
Why translation is a measurement problem, not just arithmetic
The Conceptual Framework requires assets, liabilities, income, and expenses to be measured faithfully in the CURRENCY that best reflects the economic substance of an entity's transactions. IAS 21 exists to determine that currency (functional currency) and to ensure foreign currency amounts are translated in a way that preserves faithful representation.
HOW IAS 21 MAPS TO THE FRAMEWORK
Faithful representation – the functional currency concept ensures an entity's PRIMARY economic environment drives its measurement currency, not simply the currency it happens to report in Relevance – recognising FX gains/losses on monetary items as they arise (rather than deferring them) reflects genuine changes in economic resources/obligations Comparability – a consistent, principles-based translation methodology allows group financial statements to meaningfully combine operations across multiple currencies
The functional currency determination is deliberately a matter of FACT, not a free accounting policy choice – it is determined by the primary economic environment the entity operates in, which the Framework treats as an objective, verifiable matter.
Measurement principles applied by IAS 21
IAS 21's rules split cleanly by WHETHER an item's underlying value is fixed in currency terms (monetary) or subject to a separate measurement basis (non-monetary) – directly following the Framework's asset/liability characteristics.
Item typeExchange rate used
Monetary itemsClosing rate at EVERY reporting date
Non-monetary items at historical costRate at the date of the original transaction
Non-monetary items at fair valueRate when fair value was determined
Qualitative characteristics in action: retranslating monetary items at EVERY reporting date reflects relevance – a foreign currency debt's real economic burden genuinely changes as exchange rates move, and faithful representation requires this to be shown.
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Scope & Applicability
What IAS 21 covers
IAS 21 applies to accounting for transactions and balances in foreign currencies, EXCEPT those derivative transactions and balances within IFRS 9's scope; translating results and financial position of foreign operations included in the entity's financial statements; and translating results/financial position into a presentation currency.
TWO DISTINCT PROBLEMS IAS 21 SOLVES
(1) How does an individual entity account for TRANSACTIONS denominated in a currency OTHER than its functional currency?
(2) How does a group TRANSLATE the results of a foreign operation into the presentation currency used for consolidated financial statements?
These are genuinely separate questions with DIFFERENT mechanics (Sections 4–5 for the first, Section 6 for the second) – a common source of confusion.
Key definitions you must know
Functional currency
The currency of the primary economic environment in which the entity operates.
Presentation currency
The currency in which the financial statements are presented – may DIFFER from the functional currency (an entity is free to present in any currency).
Foreign currency
A currency OTHER than the functional currency of the entity.
Foreign operation
An entity that is a subsidiary, associate, joint arrangement, or branch of the reporting entity, the activities of which are based/conducted in a country/currency OTHER than those of the reporting entity.
Closing rate
The spot exchange rate at the end of the reporting period.
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Determining Functional Currency
Primary and secondary indicators
Functional currency is determined based on economic substance, not choice. IAS 21 provides a hierarchy of indicators; primary indicators usually determine the answer, with secondary indicators as tie-breakers.
PRIMARY INDICATORS
The currency that mainly INFLUENCES sales prices for goods/services (often the currency in which sales prices are denominated/settled) The currency of the country whose competitive forces/regulations mainly determine sales prices The currency that mainly influences labour, material, and other costs of providing goods/services
SECONDARY INDICATORS
The currency in which funds from financing activities are generated The currency in which receipts from operating activities are usually retained For a foreign operation: whether its activities are an EXTENSION of the parent's (same functional currency), or carried out with significant AUTONOMY (own functional currency)
Functional currency, ONCE DETERMINED, is only changed if there is a change in the underlying transactions, events, and conditions that are relevant to it – it cannot be switched simply because management prefers a different currency's presentation.
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Foreign Currency Transactions – Initial & Subsequent Recording
Recording rules
INITIAL RECOGNITION
Record at the SPOT exchange rate on the transaction date (or an average rate that approximates it, if rates don't fluctuate significantly)
At EACH subsequent reporting date, translate: monetary items at the CLOSING rate; non-monetary items at historical cost using the HISTORICAL rate; non-monetary items at fair value using the rate WHEN fair value was determined.
Worked example – foreign currency purchase and settlement
Example 1: Trade payable denominated in a foreign currency
A UK entity (functional currency GBP) purchases inventory from a US supplier for $120,000 on 1 November (rate: $1.30/£1, so £92,308). Year end is 31 December (rate: $1.25/£1). The invoice is settled on 20 January (rate: $1.20/£1).
Initial recognition (1 Nov): 120,000 ÷ 1.30 = £92,308
Year-end retranslation (31 Dec): 120,000 ÷ 1.25 = £96,000 → FX loss of £3,692 recognised in SOPL (the GBP cost of settling the liability has INCREASED)
Settlement (20 Jan): 120,000 ÷ 1.20 = £100,000 → a FURTHER FX loss of £4,000 recognised in the following period's SOPL
Year-end retranslation (31 Dec): 120,000 ÷ 1.25 = £96,000 → FX loss of £3,692 recognised in SOPL (the GBP cost of settling the liability has INCREASED)
Settlement (20 Jan): 120,000 ÷ 1.20 = £100,000 → a FURTHER FX loss of £4,000 recognised in the following period's SOPL
FX gains/losses on monetary items are recognised in SOPL in the period they arise – split across periods if settlement occurs after a reporting date, as shown here.
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Monetary vs Non-Monetary Items – The Critical Distinction
Classification examples
Monetary itemsNon-monetary items
Cash and cash equivalentsInventory
Trade receivables/payablesProperty, plant and equipment
Loans and borrowingsIntangible assets
Provisions to be settled in cashInvestments in equity instruments (unless held for trading at FVTPL, then treated per its FV measurement date)
The test: is the item a right to receive, or obligation to deliver, a FIXED or DETERMINABLE number of units of currency? If yes → monetary. If the amount could vary based on non-currency factors (e.g. physical goods, ownership stakes) → non-monetary.
Worked example – non-monetary asset held at historical cost
Example 2: Foreign currency PPE purchase, no retranslation
The same UK entity purchases machinery from Germany for €50,000 on 1 March (rate: €1.15/£1, so £43,478), held under the cost model. At year end (31 Dec), the EUR/GBP rate has moved to €1.10/£1.
Carrying amount at year end = £43,478 (UNCHANGED) – since the machinery is a non-monetary asset held at historical cost, it is NOT retranslated at the closing rate; only its ORIGINAL historical rate applies (subject to normal depreciation).
A very common exam trap: students often incorrectly retranslate non-monetary assets held at cost using the closing rate – only MONETARY items and non-monetary items measured at FAIR VALUE are retranslated at each reporting date.
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Translating Into the Presentation Currency
The consolidation translation method – with worked example
Statement itemRate used
Assets and liabilities (SOFP)CLOSING rate at the end of the reporting period
Income and expenses (SOPL)Exchange rates AT THE DATES of the transactions (an AVERAGE rate for the period is a permitted approximation, unless rates fluctuated significantly)
Resulting exchange differencesRecognised in OCI, accumulated in a separate component of equity (the "foreign currency translation reserve")
Example 3: Translating a foreign subsidiary's SOFP
A US parent (functional/presentation currency USD) has a UK subsidiary with net assets of £2,000,000 at year end. Closing rate: $1.28/£1. Opening net assets were £1,800,000, translated at the opening rate of $1.25/£1 = $2,250,000. Profit for the year, translated at the average rate, was $180,000.
Closing net assets translated = 2,000,000 × 1.28 = $2,560,000
Expected closing net assets = Opening ($2,250,000) + Profit translated ($180,000) = $2,430,000
Exchange difference (gain) = 2,560,000 − 2,430,000 = $130,000 → OCI, accumulated in the translation reserve
Expected closing net assets = Opening ($2,250,000) + Profit translated ($180,000) = $2,430,000
Exchange difference (gain) = 2,560,000 − 2,430,000 = $130,000 → OCI, accumulated in the translation reserve
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Disposal of a Foreign Operation
Recycling the translation reserve on disposal
On DISPOSAL of a foreign operation, the CUMULATIVE amount of exchange differences relating to that foreign operation, previously recognised in OCI and accumulated in the separate component of equity, is RECLASSIFIED ("recycled") from equity to profit or loss as a reclassification adjustment.
On PARTIAL disposal (while retaining control, e.g. selling some shares in a subsidiary that remains a subsidiary), only a PROPORTIONATE share of the cumulative amount is reattributed to non-controlling interests – NOT recycled to profit or loss, since control is retained. Only a disposal resulting in loss of control (or significant influence/joint control) triggers full recycling of the parent's share.
8
Net Investment in a Foreign Operation
Monetary items forming part of the net investment
Exchange differences on a MONETARY item that forms part of a reporting entity's net investment in a foreign operation (e.g. an intercompany loan not expected to be settled in the foreseeable future, effectively permanent financing) are recognised in OCI in the CONSOLIDATED financial statements, and reclassified to SOPL only on disposal of the foreign operation – even though such a loan would normally be an ordinary monetary item recognised through SOPL.
In the SEPARATE (unconsolidated) financial statements of either the parent or the foreign operation, exchange differences on such a loan are recognised in PROFIT OR LOSS as normal – the special OCI treatment applies ONLY at the consolidated level, since it is only there that the loan is genuinely "quasi-equity" (eliminating intragroup effects).
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Disclosure Requirements
Required disclosures
GENERAL DISCLOSURES
The amount of exchange differences recognised in profit or loss (excluding those on financial instruments at FVTPL) Net exchange differences accumulated in the separate translation reserve component of equity, and a reconciliation of that amount at the beginning and end of the period
FUNCTIONAL/PRESENTATION CURRENCY DISCLOSURES
When the presentation currency differs from the functional currency, that fact, together with disclosure of the functional currency and reason for using a different presentation currency Any change in functional currency, and the reason for the change
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Critical Judgments & Estimates
Where management judgement matters most
SIGNIFICANT JUDGEMENTS
Determining functional currency, especially for entities with genuinely mixed currency exposure (a fact-based, sometimes finely balanced judgement) Whether a foreign operation's activities are carried out with significant autonomy or as an extension of the parent's operations Classifying an intercompany loan as forming "part of the net investment" (quasi-equity) versus an ordinary monetary receivable/payable
SIGNIFICANT ESTIMATES
Whether exchange rates have fluctuated "significantly," determining if an average rate approximation remains appropriate for SOPL translation Appropriate spot rate to apply when multiple exchange rates are available and genuinely exchangeable (per the 2023 IAS 21 lack-of-exchangeability amendments)
Since a 2023 amendment, IAS 21 provides specific guidance on estimating a spot rate when a currency is NOT exchangeable into another currency – a growing practical issue for entities operating in jurisdictions with currency controls.
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IFRS vs US GAAP – Key Differences
Comparison – IAS 21 vs US GAAP (ASC 830)
FeatureIFRS (IAS 21)US GAAP
Core translation methodologyFunctional currency approach – SOFP at closing rate, SOPL at transaction/average rateVery similar functional currency approach; largely converged in substance
Recycling on disposalFull recycling of cumulative translation adjustment to SOPL on loss of control/significant influence/joint controlSimilar recycling requirement on sale/substantially complete liquidation of a foreign entity – largely converged
Hyperinflationary economiesGoverned by IAS 29 – restate financial statements for the effects of hyperinflation before translationUses the REPORTING currency of the parent directly as the functional currency for highly inflationary economies (bypassing separate hyperinflation restatement)
Lack of exchangeability guidanceSpecific guidance added in 2023 amendment for estimating spot rates when a currency lacks exchangeabilityNo direct equivalent standalone guidance; addressed through general fair value/estimation principles
IAS 21 and its US GAAP counterpart are substantially converged on the core translation mechanics – the most significant divergence lies in how each framework handles HYPERINFLATIONARY economies, where the underlying philosophies differ (restate-then-translate under IFRS vs use-parent-currency-directly under US GAAP).
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Statement Mapping – Where Every FX Event Lands
Comprehensive event-to-statement mapping table
Event / transactionStatement(s) affectedNotes
Initial recognition of a foreign currency transactionSOFPRecorded at the transaction-date spot rate
Retranslation of monetary items at each reporting dateSOPL SOFPFX gain/loss recognised immediately
Non-monetary items at historical cost–NOT retranslated; historical rate preserved
Non-monetary items at fair value (revalued/FVTPL/FVOCI)SOFP SOPL/OCITranslated at the date fair value was determined; FX effect follows the underlying item's own gain/loss classification
Translation of a foreign operation's SOFP for consolidationOCI SOFPClosing rate used; resulting difference to translation reserve
Translation of a foreign operation's SOPL for consolidationSOPLTransaction-date (or average) rate used
Disposal of a foreign operation (loss of control)OCI SOPLCumulative translation reserve recycled to SOPL as part of gain/loss on disposal
Exchange differences on a net-investment intercompany loan (consolidated level)OCIRecognised in OCI, recycled only on disposal of the foreign operation
Same loan in separate financial statementsSOPLOrdinary monetary item treatment – no special OCI deferral
Cash flows in foreign currencyCash Flow StatementTranslated at transaction-date rates per IAS 7; FX effect on cash held is a separate reconciling item
Functional currency determination, translation reserve reconciliationNotesMandatory disclosure
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Related Standards – Cross-Reference Map
How IAS 21 connects across the IFRS body of literature
StandardNature of the connection
IFRS 9Derivative instruments used to hedge FX risk (forward contracts, currency swaps) are excluded from IAS 21's transaction rules and follow IFRS 9's hedge accounting/measurement rules instead
IAS 29Financial statements of an entity whose functional currency is that of a HYPERINFLATIONARY economy must be restated under IAS 29 BEFORE translation under IAS 21
IFRS 10Determines whether a foreign entity is a subsidiary requiring consolidation and translation under IAS 21's foreign operation rules
IAS 7Determines how foreign currency cash flows are translated for the statement of cash flows, and how the FX effect on cash balances is separately reconciled
IAS 12Exchange differences recognised in OCI create temporary differences whose related deferred tax also follows into OCI, per IAS 12's "tax follows the item" principle
IAS 2Foreign exchange differences on inventory purchases invoiced in foreign currency are generally NOT capitalised into inventory cost under IAS 2, and instead follow IAS 21's normal monetary item treatment
IFRS 3Goodwill and fair value adjustments arising on the acquisition of a foreign operation are treated as ASSETS/LIABILITIES of the foreign operation, and translated at the closing rate along with the rest of its net assets
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Quick-Reference Glossary
Spot exchange rate
The exchange rate for immediate delivery, used to record the initial recognition of foreign currency transactions.
Exchange difference
The difference resulting from translating a given number of units of one currency into another currency at different exchange rates.
Net investment in a foreign operation
The amount of the reporting entity's interest in the net assets of a foreign operation, including any monetary item accounted for as part of that net investment (e.g. long-term intercompany loans not expected to be settled).
Reclassification adjustment
Amounts reclassified to profit or loss in the current period that were previously recognised in OCI – applies to cumulative translation differences on disposal.
Fair value hedge / cash flow hedge
Hedge accounting designations under IFRS 9 that may modify the normal IAS 21 treatment of exchange differences on hedged monetary items.
Translation reserve
The separate component of equity accumulating cumulative exchange differences arising on translating foreign operations for consolidation.
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
Dec-1977
Exposure Draft E11 Accounting for Foreign Transactions and Translation of Foreign Financial Statements
Mar-1982
E11 was modified and re-exposed as Exposure Draft E23 Accounting for the Effects of Changes in Foreign Exchange Rates
Jul-1983
IAS 21 Accounting for the Effects of Changes in Foreign Exchange Rates
01-Jan-1985
Effective date of IAS 21 (1983)
1993
IAS 21 (1983) was revised as part of the comparability of financial statements project
May-1992
Exposure Draft E44 The Effects of Changes in Foreign Exchange Rates
Dec-1993
IAS 21 (1993) The Effects of Changes in Foreign Exchange Rates (revised as part of the 'Comparability of Financial Statements' project)
01-Jan-1995
Effective date of IAS 21 (1993)
18-Dec-2003
Revised version of IAS 21 issued by the IASB
01-Jan-2005
Effective date of IAS 21 (Revised 2003)
Dec-2005
Minor Amendment to IAS 21 relating to net investment in a foreign operation
01-Jan-2006
Effective date of the December 2005 amendments
10-Jan-2008
Some revisions of IAS 21 as a result of the Business Combinations Phase II Project relating to disposals of foreign operations
01-Jul-2009
Effective date of the January 2008 amendments
15-Aug-2023
Lack of Exchangeability (Amendments to IAS 21) published
An entity applies the amendments for annual reporting periods beginning on or after 1 January 2025
13-Nov-2025
Translation to a Hyperinflationary Presentation Currency (Amendments to IAS 21) issued
The amendments are effective for annual periods beginning on or after 1 January 2027 with earlier application permitted