Brokerage firms differ in the services they provide, in their success in helping clients identify potentially profitable investment opportunities, and in the commissions which they charge. Provided commissions are stated in a clear and forthright manner, each firm can set its own rates - the same as firms in the securities industry do. Nevertheless, commissions are one variable in an option's profit equation and you should be satisfied that they are fair and reasonable in relation to the services and advice being provided.