I am wondering how to account for foreign exchange fluctuations when converting USD to CAD. I have money in a USD from when I worked in the US several years ago. At the time, the USD was not as strong and I paid Canadian and US income taxes on the income. Since then, the money has sat in a savings account and earned a bit of interest. I've claimed that interest as income each year on my taxes. Now I am looking to close out the USD account and convert it to CAD. Will I have a capital gain? How do I figure out my adjusted cost base?