Section 43AA Income Tax Act 1961: Taxation of Foreign Exchange Fluctuation

Updated: 28 September 2026

Section 43AA of the Income-tax Act, 1961 dealt with the tax treatment of gains and losses caused by changes in foreign exchange rates. From 1 April 2026, the Income-tax Act, 2025 is in force. The corresponding current provision is Section 43 of the 2025 Act, while Section 42 deals with capitalising specified foreign-exchange fluctuation relating to assets acquired from outside India.

Current-law note: This page retains Section 43AA because the URL and historical material concern the Income-tax Act, 1961. For tax years governed by the Income-tax Act, 2025, refer to Section 43, read with Section 42 and the applicable Income Computation and Disclosure Standards.

What did Section 43AA provide?

Section 43AA required a gain or loss arising because of a change in foreign exchange rates to be treated as income or loss, subject to Section 43A. The amount was to be computed in accordance with the Income Computation and Disclosure Standards notified under Section 145(2) of the 1961 Act.

In practical terms, the provision connected the statutory treatment of foreign-exchange differences with the notified ICDS framework, particularly ICDS VI dealing with the effects of changes in foreign exchange rates.

Legacy text of Section 43AA of the Income-tax Act, 1961

43AA(1). Subject to the provisions of section 43A, any gain or loss arising on account of any change in foreign exchange rates shall be treated as income or loss, as the case may be, and such gain or loss shall be computed in accordance with the income computation and disclosure standards notified under sub-section (2) of section 145.

43AA(2). For the purposes of sub-section (1), gain or loss arising on account of the effects of change in foreign exchange rates shall be in respect of all foreign currency transactions, including those relating to:

monetary items and non-monetary items;
translation of financial statements of foreign operations;
forward exchange contracts; and
foreign currency translation reserves.

Meaning of important terms under ICDS VI

ICDS VI provides the computation framework for foreign-currency transactions. Important concepts include:

Foreign currency transaction: a transaction denominated in, or requiring settlement in, a foreign currency. It can include foreign-currency purchases or sales, borrowings or lending, forward exchange contracts, and foreign-currency assets or liabilities.
Monetary items: money held and assets receivable or liabilities payable in fixed or determinable amounts of money, such as cash, receivables and payables.
Non-monetary items: assets and liabilities other than monetary items, such as fixed assets, inventories and equity investments.
Exchange difference: the difference arising when the same amount of foreign currency is reported in the reporting currency at different exchange rates.
Forward exchange contract: an agreement to exchange currencies at a forward rate, including specified similar instruments covered by ICDS VI.

Section 43AA and Section 43A: what was the difference?

Section 43AA was expressly subject to Section 43A. Section 43A contained a special rule for exchange-rate changes affecting specified liabilities connected with assets acquired from outside India for business or profession. Accordingly, a transaction falling within Section 43A was dealt with under that special provision rather than the general Section 43AA rule.

Issue	1961 Act	Current 2025 Act
General taxation of foreign-exchange fluctuation	Section 43AA	Section 43
Specified exchange fluctuation connected with foreign assets	Section 43A	Section 42
ICDS enabling provision	Section 145(2)	Section 276(2)

Current law from 1 April 2026: Section 43 of the Income-tax Act, 2025

The Income-tax Act, 2025 came into force on 1 April 2026. Section 43 now provides the rule for taxation of foreign-exchange fluctuation. Subject to Section 42, a gain or loss arising from a change in foreign exchange rates on foreign-currency transactions is treated as income or loss and computed under the ICDS notified under Section 276(2).

The current provision expressly covers foreign-currency transactions relating to monetary and non-monetary items, translation of financial statements of foreign operations, forward exchange contracts and foreign currency translation reserves. This substantially carries forward the subject matter of former Section 43AA in the reorganised 2025 Act.

How ICDS VI applies

ICDS VI deals with foreign-currency transactions, translation of financial statements of foreign operations and forward exchange contracts. It does not govern foreign-exchange gain or loss relating to a capital asset purchased from a foreign country where the special capital-asset provision applies.

For tax computation, monetary items are generally translated using the closing rate, subject to the detailed rules and exceptions in ICDS VI. Non-monetary items are generally converted using the exchange rate at the date of the transaction, with specific treatment where an item such as inventory is carried at net realisable value. Forward exchange contracts have separate rules for premium or discount and exchange differences.

Why the provision matters

Businesses dealing with imports, exports, foreign-currency receivables or payables, overseas operations, foreign-currency borrowing or forward contracts may recognise exchange differences for tax purposes. The correct treatment depends on the nature of the item, whether the special capital-asset rule applies, and the applicable ICDS computation rule.

Book accounting and taxable income are not necessarily identical. ICDS is used for computation of taxable income within its statutory scope and is not itself a standard for maintaining books of account.

Official references

Related provisions

For the legacy 1961 Act framework, also see Section 43A - changes in rate of exchange, Section 43 - definitions relevant to business income and Section 43B - deductions on actual payment.

This article is a general legal and tax information resource. Application to a particular transaction depends on its facts, the relevant tax year and applicable statutory and ICDS provisions.