Is he right in what he is saying??

Hi

My x2b is telling me that my children's (age 13, 7) maintanence money will drop when he moves in with his partner (she has 2 boys, 14 and 17, the youngest is diabetic. Is this right??

That's correct, the CSA will deduct 20% from his income before calculating CM. So for example if he earns £1,000 net a month 20% is deducted (£200) leaving £800; CM for two children is then calculated at 20% of £800 = £160.