Most institutions do not charge a commission on the currency exchange, the spread is built into the price that the client receives. There may be charges for wire transfers, and these are set by the institution that is doing the actual sending. Some banks may charge on the size of the ticket, in the past, it was common for banks to charge as much as a $800 to send the funds on top of the client’s price. It is best to ask this question when entering any negotiations so there are no surprises.