I can’t get husband to see it not fair or am I wrong ?

[Vbi]

My husband and I constantly disagree about how much he pays towards the household bills

we are both in a second marriage
we live in my house , and he has kept his original home which is empty, not rented
my 16 year old son lives with us and I have another at uni , who comes home in term times
i am employed with a good job and he owns his own company which is doing very well - we probably earn about the same

our household bills , mortgage , utilities and food come to about £2500 but that’s increasing monthly like everyone’s
I never ask him to pay for the childrens expenses or mine
since he moved in he has paid £600 a month and pays if we go out which is 1-2 times a week but nowhere fancy
I have asked him to increase his contribution but he refuses

He says I am being unreasonable , I’m sure I’m not but wanted your opinions

Why isn't he renting out his house?

This makes me realise how lucky I am. Because DH absolutely stepped in and paid for stuff for my DC
at times. I didn't have much money when we got together as they were young so nursery bills were high. And my ex rarely paid maintenance as he liked to withhold it to punish me for the smallest things (sending a child to his with a sock with a hole in, being a minute late dropping them off).

And now (in no small part thanks to him pulling his weight and sometimes more in the housework) I have climbed the career ladder fast and earn more than he does and am quite happy to pay for things for his DC.

Isn't that what a partnership is?

Admittedly in op's case I think there is more to unpick- eg why doesn't he rent his house out?does he have a mortgage to pay on that? And op was presumably happy with the cost split when he moved in (and they married) so what has changed now?