Section 43 of Income Tax Act 2025: How Are Foreign Exchange Gains and Losses Taxed?
Section 43 explains when gains or losses arising from changes in foreign exchange rates are recognised for income-tax purposes. It covers foreign currency transactions, monetary and non-monetary items, foreign operations, forward contracts and foreign currency translation reserves.
What does Section 43 provide?
Section 43(1) provides that, subject to Section 42, any gain or loss arising because of a change in foreign exchange rates on foreign currency transactions is treated as income or loss, as applicable. Its computation must follow the income computation and disclosure standards (ICDS) notified under Section 276(2).
Section 43(2) makes clear that the rule applies to all foreign currency transactions, including the four categories listed below. The section is a tax-computation rule; the accounting entry alone does not necessarily determine the final tax treatment.
Which foreign currency transactions are covered?
Foreign currency balances, receivables and payables may give rise to exchange differences. Non-monetary items can also fall within the statutory scope, but their measurement and recognition must follow the applicable ICDS rules.
Where financial statements of a foreign operation are translated into the reporting currency, resulting exchange differences are addressed under the applicable tax-computation standards.
Exchange differences and other recognised amounts arising from forward foreign exchange contracts require treatment in accordance with the applicable ICDS, including relevant exceptions and contract classifications.
The statute expressly includes foreign currency translation reserves within the scope of foreign currency transactions governed by Section 43, with the computation controlled by the notified standards.
Important terms and statutory context
Foreign currency transaction: A transaction denominated in or requiring settlement in a currency other than the relevant reporting currency. The applicable ICDS supplies detailed recognition and measurement rules.
Monetary item: Generally, money held and assets or liabilities to be received or paid in fixed or determinable amounts of money, subject to the applicable ICDS definition.
Non-monetary item: An asset or liability that does not represent a right to receive, or an obligation to deliver, a fixed or determinable amount of money; its tax treatment depends on the relevant standard.
Forward exchange contract: An agreement to exchange currencies at a specified rate on a future date; the applicable ICDS determines how differences and premiums or discounts are treated.
ICDS: Income Computation and Disclosure Standards are notified standards used for computing taxable income, and may differ from financial reporting standards.
How does Section 43 interact with Section 42?
Section 43 begins with the words "Subject to the provisions of section 42". Accordingly, an exchange difference governed by the capitalisation mechanism in Section 42 must first be considered under that provision. A taxpayer should not automatically recognise the same amount again as an independent revenue gain or loss under Section 43.
Read the companion article: Section 42: Capitalising the impact of foreign exchange fluctuation.
Practical illustrations
Example 1: Foreign currency trade payable
A business records an eligible trade payable of USD 10,000 at Rs. 83 per USD (Rs. 8,30,000). If the relevant exchange rate becomes Rs. 85, the difference is Rs. 20,000. The tax treatment and timing of recognition must be determined under Section 43 and the applicable ICDS, taking account of the nature of the payable.
Example 2: Foreign currency receivable
A qualifying USD 5,000 receivable initially measured at Rs. 84 per USD is subsequently measured at Rs. 86. The illustrative increase is Rs. 10,000. Whether and when this is recognised as taxable income depends on the relevant ICDS rules and facts.
Example 3: Borrowing used to acquire an asset
Where foreign currency borrowing is connected with acquisition of an asset, Section 42 must be checked before applying the general income-or-loss treatment under Section 43. The outcome depends on the statutory conditions and the relevant asset and borrowing details.
These figures are simplified illustrations, not a substitute for a transaction-specific computation.
Records and compliance considerations
- Maintain invoices, loan documents, forward contracts and settlement evidence.
- Record transaction dates, relevant exchange rates and supporting rate sources.
- Distinguish capital-related exchange differences from revenue-related items.
- Reconcile book entries with tax computations under the notified ICDS.
- Document the treatment of foreign operations and translation reserves where applicable.
- Verify the relevant notifications, rules and amendments for the tax year concerned.
Frequently asked questions
Is every foreign exchange gain taxable under Section 43?
Section 43 establishes the general treatment of exchange gains and losses, subject to Section 42 and the applicable ICDS computation rules. The facts, character of the transaction and applicable exceptions matter.
Does Section 43 cover unrealised exchange differences?
The provision covers exchange differences broadly, but the timing and method of recognition must be determined under the applicable ICDS rather than assumed solely from the financial statements.
Are forward exchange contracts included?
Yes. Section 43(2)(c) expressly includes forward exchange contracts. Their detailed tax treatment is governed by the relevant notified ICDS.
What is the difference between Sections 42 and 43?
Section 42 addresses capitalisation of specified foreign exchange fluctuations. Section 43 provides the general tax treatment of foreign exchange gains and losses, expressly subject to Section 42.
Official legal sources
Last updated: 10 November 2026. This is general legal information; apply the current statutory text, ICDS notifications and facts of the relevant tax year.