My OH left me and 2 young children, I have seen a solicitor and they are asking for an interim payment to cover the mortgage and living expenses (I have been a SAHM as agreed during the relationship to cut down on childcare costs and enable OH's career progression) I am unsure whether when you go on the CMS website the amount it calculates is supposed to cover everything for your child, or if I use that amount for food, clothes, activities etc and then add on a % of the mortgage, council tax etc. Anyone have any experience?