Both paid into the joint account, all bills come out of it. Then at the beginning of the month (payday) you get your money for any additional spending e.g. haircut, night away with friends, new clothes - you're 'allowed' anything, but you should 'declare' it at the beginning of the month and you get your money for it then.
Then, you get 'paid' £80 per week personal money from the joint account every Friday, this is for your petrol and general personal miscellaneous spending, drinks with friends, make up and the like. In addition, there is also £150 per week for the food shop, the person doing the food shop that week transfers it into their account, any change goes into a cash pot in the kitchen, you get top-up shops from there, not your personal money.
How much the bills, big-ticket items, £80 per person per week plus the food shop is added up at the beginning of the month. A couple of hundred is kept in the joint account as a buffer for random meals out, school trips, unexpected items, and the rest gets transferred to the savings. You don't touch the joint account at any other time as your money is already allocated!
It might seem a bit complicated but it's not really. We've done it this way for 20 years, we're never overdrawn and always have a bit left at the end of the month.
What you earn and pay in is irrelevant, e.g. when I was on maternity. You both get an equal share out!
It all sounds very complicated but we've been