Cash
Cash you hold in a foreign currency in a safety deposit box, as a traveller’s cheque, in a bank account or in a High Interest Savings Account (HISA) is subject to special rules with respect to reporting gains and losses because of fluctuations in foreign exchange rates. For administrative ease, the first C$200 of the sum of all foreign exchange gains and losses on cash are exempt from taxation in a taxation year. If the sum of all the exchange gain or losses for all these forms of cash is in excess of C$200, the excess must be reported for Canadian income tax purposes. Note that this C$200 exemption does not apply to gains and losses realized on the sale of securities denominated in foreign currencies.The CRA considers that a foreign exchange gain or loss has occurred:
a) at the time of conversion of funds in a foreign currency into another foreign currency or into Canadian dollars; or
b) at the time funds in a foreign currency are used to make a purchase or a payment.
For example, let’s say you deposit C$100,000 in a U.S. dollar HISA when the Canada-US exchange rate is par. You keep the funds there until the Canadian dollar strengthens, then you either withdraw the funds from the HISA to purchase a publicly-traded stock, or you convert the funds to Canadian dollars. In either case, the CRA considers that a foreign exchange gain or loss has occurred. You must report all foreign currency capital gains related to cash on your Canadian tax return except for the first C$200 that is exempt. If you simply withdraw the cash in U.S. dollars and place the cash in your safety deposit box, there is no foreign exchange gain or loss triggered at this time.