How do you distinguish between a sick day and a vacation day for the client. Just as the parents who have "sick" days at work will tell the employer they are home sick when they are really entertaining company or cleaning their house or taking a spa day. You may have to streamline things to have 5 days no pay and ALL other days are half fee. The half fee would cover sick, vacation, grandma visiting days, etc. I know you didn't ask for critique but I am really asking a question as to how you clarify the difference with your clients. As I see the dilemma the parent paid when they attended and didn't pay for 5 days off and didn't pay when they were home "sick" which is all legal by your contract. What is the definition of "sick". Sometimes we all feel too sick to go to work.