50/50 shared care but taking advantage?

[4anddog]

Hi everyone, first post here so apologies in advance for anything ridiculous! I have 4 children aged 12-17. We have an agreed 50/50 care arrangement. However presently DD isn’t even going to her dad because she doesn’t like his partner and a couple of other things. I’m not taking any pleasure in this, I’d rather the children were together even though it’s a bit rubbish without them ☹️
He fought for 50/50 which as posted I agreed to but it really feels like his motivation was financial so he didn’t have to pay anything to me.
He keeps asking me to have them whilst he goes off on holiday (4 weeks booked in for this year so far). So here’s the point (sorry) AIBU to ask for some kind of financial support for the extra time the children are with me? His earnings are 10x mine and he lives with a partner also on good salary. Also was recently revealed he lied and hid assets during the divorce. It sounds petty to say I’m covering extra meals, electricity, transport etc but it all adds up and on a low salary. Has anyone else been in this position? Shoot your honesty at me. I’ve put up with quite a lot so I’m sort of feeling enough is enough. Do I just take it on the chin?

Ask which weeks he wants to swap for his holiday weeks?

Thanks. I always make a swap when I change weekends etc with him. This is a good idea.

I was going to suggest the same swap weeks. 4 weeks out of 26 is a lot

I wouldn't agree to taking them the weeks he wants until you've both decided which weeks he is having instead. That way he'll realise 50/50 is 50/50 hopefully...

Is he pulling his weight buying half of everything they need - including random stuff like birthday presents for parties etc/after school activities

Thank you all, I’ve had the conversation about 50/50 being equal responsibility on all things. I think it’s exacerbated by the fact that my daughter won’t go at all just now. Hopefully things will resolve peacefully soon!

Yes we split the cost of everything/ he’s pretty extravagant with the large presents and foreign holidays too. They don’t miss out directly

If your daughter isn't going he needs to start paying maintenance for her.

If your daughter isn't going he needs to start paying maintenance for her

This! Claim for one child via cms. Also swap weeks, he can have them in school holidays, meaning you can work without worrying about childcare.

Second that,

Ask for a contribution for DD who is not seeing her dad, then if he’s unable to swap weeks then have a look at the CMS calculator online, see what he’d roughly have to pay for your 4 children if you didn’t share care (so say 80/20 spilt if you’re now doing 3 weeks and he’s doing 1)
Then see what he would owe. Even if he can’t stump up the whole amount for whatever reason he should 100% be paying for food, electric, water that would be extra. Teens are bloody expensive, I’ve got 3 at home that have shared care and I spend at least £160 on shopping every week.

He should be paying 4/7th of the child maintenance levels expected for someone with 4 dependent children. So that's 19 % of his weekly gross income upto £800. Then 15% of his weekly gross income between £800-3k. Then you receive 4/7th of this if he has all 4 children. The calculations get more complicated of one is not going, but probably wouldn't change that much as usually its a set rate for 3 plus children.
Any income over 3k a week gross needs to go via courts.
Yes he should be paying it. If he won't go directly to the child Maintenance service.

It's his choice to have 4 weeks totally child free and this is part of the consequence.