All Changes in Foreign Exchange Rates :

Tax Effects of Exchange Differences

Gains and losses on foreign currency transactions and exchange differences arising on the translation of the financial statements of foreign operations may have associated tax effects which are accounted for in accordance with AS 22, Accounting for Taxes on Income.

Forward Exchange Contracts 6 

An enterprise may enter into a forward exchange contract or another financial instrument that is in substance a forward exchange contract, which is not intended for trading or speculation purposes, to establish the amount of the reporting currency required or available at the settlement date of a transaction. The premium or discount arising at  the inception of such a forward exchange contract should be amortised as expense or income over the life of the contract. Exchange differences on such a contract should be recognised in the statement of profit and loss in the reporting period in which the exchange rates change. Any profit or loss arising on cancellation or renewal of such a forward exchange contract should be recognised as income or as expense for the period.

The risks associated with changes in exchange rates may be mitigated by entering into forward exchange contracts. Any premium or discount arising at the inception of a forward exchange contract is accounted for separately from the exchange differences on the forward exchange contract. The premium or discount that arises on entering into the contract is measured by the difference between the exchange rate at the date of the inception of the forward exchange contract and the forward rate specified in the contract. Exchange difference on a forward exchange contract is the difference between (a) the foreign currency amount of the contract translated at the exchange rate at the reporting date, or the settlement date where the transaction is settled during the reporting period, and (b) the same foreign currency amount translated at the latter of the date of inception of the forward exchange contract and the last reporting date.

A gain or loss on a forward exchange contract to which paragraph 36 does not apply should be computed by multiplying the foreign currency amount of the forward exchange contract by the difference between the forward rate available at the reporting date for the remaining maturity of the contract and the contracted forward rate (or the forward rate last used to measure a gain or loss on that contract for an earlier period). The gain or loss so computed should be recognised in the statement of profit and loss for the period. The premium or discount on the forward exchange contract is not recognised separately

In recording a forward exchange contract intended for trading or speculation purposes, the premium or discount on the contract is ignored and at each balance sheet date, the value of the contract is marked to its current market value and the gain or loss on the contract is recognised.