How much should I charge for a summer holiday retainer. The 2 children stop comming to me in first week in July, then return in September. I have told the parent I would like a small fee. How much? There are so many childminders in my area so lots of competition. Also I have 3 children of my own so it suits me. Also I am currently having the children for One day a week and the parent doesn't know when they will be working in September.