Usually an additional cost to cover the child on medical insurance is split on a pro-rata basis. As such, it's not that the entire amount would be taken off the basic order - instead, only the portion you would otherwise need to pay would be subtracted. In other words, if the comparison between your income & his is 80%-20%, then only 20% of the additional premium would be subtracted off the order. Regardless, he need to prove what that additional amount is. Schedule a consult with a child support lawyer in your area.   -- David Bliven, Westchester Child Support attorney (