How much will a theatrical agent cost me?
It really shouldn't cost you anything. The best and most reputable agents don't charge you to come into their office and take you on as a client. They make their money when you work. I should rephrase that. It will cost you something: in most cases it will cost you 10% of your income. Some places, some arrangements may be slightly more than that - 12%, 15%. But in general, 10% is the commission that you would pay to an agent every time that they send you for a job that you actually book. When you actually get the job, then you are beholden to them for having sent you on the job interview, the audition. Their form of compensation is 10% of an actor's work.