When you book a profit on eToro, yes you are required to pay taxes as per your country regulations. For example: You Bought XYZ Stock at USD 10 and sold the XYZ Stock at USD 12.50, you booked a profit of USD 2.50 and it is taxable as per your local/country laws. If you don't know about legal regulations related to taxes then we strongly recommend hiring a Chartered Accountant.