Hi Georgia
I’m afraid I can’t comment from an official stance as mine and my ex’s arrangements were agreed between us. Adhered to what the calculator said though. When she had him the majority of the time up until around 15 months, I paid the full amount, and shared paying for kitting the house out with baby stuff. We’ve since moved to a 50/50 arrangement with child care, so we don’t pay each other anything, but share clothes buying etc, but if she has extra curricular things she wants to do her end, she pays, and likewise me at mine. I know that doesn’t really help much, but I don’t think your ex is being very fair. Perhaps if he was paying the full amount he may have an argument, but to pay for school trips as well out of what he’s giving can’t be right at all. I’m sure I’ve heard that there can be an attachment to earnings if they aren’t paying enough, but you’d have to look into it.