Ex and I have been separated 3 years now and originally agreed to split all children costs like clubs, school dinners, clothes etc 60:40 because he earns more than me. If you add up our salaries his is roughly 60% of the total and mine is 40%. He is now saying he thinks we should split the costs 50:50 now because we have the children 50% of the time each (and always have done since the separation). I think we should stick with 60:40, but am interested to know how others work out how to split costs. Thanks 😊