I did not realise you were assuming that the taxpayer already held the CAD for some period of time before the coffee purchase. So US tax law provides no excepti

I did not realise you were assuming that the taxpayer already held the CAD for some period of time before the coffee purchase. So US tax law provides no exception for trivial capital gains on personal use assets? Clearly it makes sense to bring forex gains and losses to account when dealing with large transactions and investments expected to produce a return (eg. cryptocurrency). But in my country, a small balance in a foreign bank account held for the purpose of personal expenditure while in that country would not be regarded as a capital asset where every transaction is taxable.