What I do is raise rates for new families coming in but reward loyalty by not raising rates of families in care. Sort of like a landlord does with apartments. When someone moves out he can raise the rate to whatever he wants to. I think I would be waiting till the one year mark to raise the rates but do give your families some notice that it is coming and ask anyone with concerns to speak to you as soon as possible. Hopefully that will give you an idea of anyone that is thinking of moving on.