definition retainer fee
Definition: A retainer fee is a fixed amount of money that a client agrees to pay, in advance, to secure the services of a consultant or freelancer.The fee is typically not associated with the success of a project or based on achieving particular results.upiterimages/Stockbyte/Getty Images. Definition: A retainer fee is a fixed amount of money that a client agrees to pay, in advance, to secure the services of a consultant or freelancer. The fee is typically not associated with the success of a project or based on achieving particular results.