"Since he is being so bratty id price up rent, electricity, water, tv licence, etc and bill him. He buys his own food and anything else he needs from the rest." Can absolutely see the merits of this idea too!
I still remember from my teen years a few of my friends parents getting so fed up of my friends and their siblings excessive use of the telephone (and not being mindful of when cheaper rates kicked in) and putting locks on the phone or turning them into payphones! My friends moaned at the time but now they're parents themselves (and actually not long after when they became liable for their own bills) they often say they wish they could put meters/locks on their kids mobile phones!
PocketsForMe - so does dd then give you that money to cover her costs? Or are you paying for them AND she's getting a hell of a lot of money as basically "pocket money" from your ex?
Quite honestly aside from the financial side of things I'd be having a serious word with him about respecting the fact YOU are the one that's been the main parent, the one that has been there for him. YOU are the one that's done the vast majority of sleepless nights, caring for him when he had colds/flu, nightmares, friendship fallouts, vaccinations...
YOU were the one who not only paid for but ensured he was cared for at good quality childcare when he was young enough to need it.
YOU were the one taught him to swim, cycle, tidy his room, pack his school bag...
YOU were the one at parents eves, nativities, awards presentations...
Yea maybe I'm making assumptions and his dad did some of that but I'm willing to bet from sounds of things precious bloody little of it!
"Silly things like washing powder, toothpaste, toiletries etc are all necessities that probably dont cross his mind but they all add up" Yep include all of it
I remember my sister having an argument with my mum once about electricity use (she kept leaving stuff on! Not just on standby either but properly on!) we were on a meter at that point, when dad got home and was told he was not impressed! He pointed out how much they put in the meter each week, then promptly removed the fuses from ALL The plugs in sisters room and told her she wasn't getting them back for a week, then the following week pointed out how much that had saved them! (It was "only" £15 but that was a lot of money 30 odd years ago and a most half the bill!!) sister suitably chastised, got her fuses back and stopped bloody leaving stuff on! My parents main concern was actually the fire risk! The main thing she kept leaving on was bloody hair tongs which she'd leave on lying next to the box of tissues! But the money was an issue too and this exercise did bring it home to her.
The OTHER benefit of them getting a job is they start mixing with older people who aren't their parents (cos what could a mere mum know about real life?! 🙄) who will look at them askance if they come out with entitled/spoilt bullshit and put them straight!
Dd wasn't this bad at 16 but even she has improved since starting her current job as she's become very friendly with a single mum who's only a few years older than her who was a teen mum and has had life hit her hard so far.