Name change for this. I'm actually pretty sure IABU but wanted to get some other opinions.
Since having dc2 four years ago I've been a sahm although just over a year ago I started working a day or two a week when the work is there freelancing. I can't do more as I need to work around dh and if he is working loads it's good for me not to have a contract so I can have the kids full time.
Dh takes home 10-12k per month net. He pays for family holidays, days/nights out, anything to do with the house, all bills, all large car expenses. All his earnings go into a business account. He transfers an amount to his own personal account and to me each month. He transfers £1300 to me and with that I buy the food shopping, kids activities (2 dc), kids clothes/shoes/presents etc, mobile phone bill, petrol, card repayments, and general stuff for me such as meals out with friends, hair cuts, clothes etc.
Most months it is not enough. We do eat well and prioritise fresh food so our food bill is about £600 per month which I know is a lot but we also eat all of our meals at home. As the kids have got older days out/activities cost more plus lots of kids parties so presents for those, hair cuts, etc. Dh goes away with friends each year and I do as well but those costs would also come out of the £1300.
For the first few years if it wasn't enough I would use my credit card rather than ask for more so I ended up with about £4000 on cards. It's all interest free and is now about £2500 and I pay off about £100 per month.
Since joining Mumsnet a few years ago I started to think maybe this wasn't the norm so had a discussion with dh and he did up it £100 (it was originally 1200). I brought it up again recently and he has said I can use his credit card if I run out of money before the end of the month. I have done this a few times around Christmas when money is especially tight. If I can work a few days a week I'm generally ok.
We share the childcare and housework 50/50, he doesn't make me feel bad for taking the credit card although I can sense he would rather I didn't. We have a lovely lifestyle which he funds and he doesn't mind me spending money on things. Just he seems to think it should be enough. I wonder if I should insist on having more. We don't have a joint account and I'm happy with that as would still not pay all income into it so don't really see the point. We save a lot so it's not like he's out shopping or anything. He has an expensive hobby and has a holiday or two with friends a year. Maybe a joint credit card would be the answer.
YABU: your financial agreement is fine
YANBU: there are problems with your family finances.
Sorry this is so long!