Syag:
While I cannot vouch for the 50% figure, the basis for calculation for child support is not based on the expenses for the children, but on the parent’s income. I believe in NYS (you may check with the statutes and with attorneys for accuracy here), the demand for support of one child is a max of 17% of the parent’s income. Assuming that the child is residing with the mothers, we are talking about the father’s income. For 2 children, that percentage rises to 25%. I’m not sure whether there are higher percentages for largewr numbers of children.