We both work dh full time I'm part time although I'm on maternity leave at the moment.
Years ago I added up all the bills, food etc to find out how much it costs each month rounded it up and it's split between the two of us. We adjust it every year when the bills increase, like the coucnil tax, tv licence. Dh puts his share into my bank account when he gets paid as all the direct debits come out of my account and all the bills are in my name, always have been. AFter all the bills have been paid there is some money left over at the end of the month that is put aside towards, christmas, holidays, emergencys etc.
The child benefit and the child tax credits go into another bank account in my name and I control that money and spend it on the girls, clothes, nappies, wipes, etc.
I should point out that after dh has put his share of the bills into my account he has money left over in his account that is for him to spend on what ever he wants and I'm the same. It's not a huge amount and neither is mine but it's ours to spend on what we want throughout the month, clothes, books, going out whatever.
We have a food shopping budget which we stick to. And I have a credit card but the only money that goes on that is the Internet bil and it's cleared every month. Dh doesn't believe in Credit cards and would never have one if he wants to buy something he saves up until he has enough money to buy it. If we needed something major in an emergency though like new fridge freezer etc we know that we have the Credit card there to buy it.
We've always shared all the bills etc. If one of us won the lottery it would be shared between us it wouldn't just be that persons money. Same for inheritance it would be spent on all of us not just the person who got it.
Money is not an issue for us we manage to get to the end of the month without being flat broke and I like to know that everything is paid and what's left over as I'm paranoid about being in debt. A friend of mine had a strange money situation when she was with her husband and they were in loads of debt it used to worry me sick that we would end up like that if we weren't careful. Sometimes I think I might be a bit too careful but I'd rather be careful than have sleepless nights.