I recently raised my rates after 2 years running and no rate increase. I had signed on a new baby at the increased rate a few months back and gave notice to the current families that rates would increase as of July 2015 (almost 3 months notice). I had one parent leave due to this but filled the spot right away. I was nervous that I would loose more than one but decided that what i have to offer is worth more than what i was charging. Good news was that the dkp that left was the one i was hoping would move on to find something that fit their needs better and stopped "complaining" about things everyday! worked out for me!