whatever you charge...first make sure that you are going to be comfortable with that fee...after it's set.. it's hard to change it...we watch our 4 grandsons in our home M-F (11+ hours a day) plus transport the eldest to and from school...give baths, do laundry, make sure homework is done and transport to swimming, football, soccer, baseball practices...if they weren't our grandkids...they couldn't afford us..for all we do.