When it comes to your children, quality care isn't an expense-- it's an investment. Choosing any nanny agency may come with a fee, but the value you receive in return far outweighs the cost. At Tried and True - Nannies & Sitters, our nanny agency investment ensures families are supported every step of the way-- from the interview process to ongoing placement support and perks that make parenting easier. Why Pay a Retainer? The retainer fee-- 15% of your nanny's annual salary-