How much do you pay an acting agent?

Answer 1

A acting agent should never be paid for signing. They however should receive 10 to 15 percent of the amount the actor or actress receives for any role they got them.

Answer 2

The standard practice is that you need to pay upfront to hire a literary agent. Agents normally get a part, ~15%, of the royalty. If a agent ask for advance upfront, run away from it.