Our arrangement started when we moved in together, and did not change when we married, nor when we bought a house. We opened a joint account, and we pay equal percentages of our paychecks into it. We put in enough to pay rent/mortgage, bills, and groceries (and now kid’s stuff). We each have the accounts we had before, and we keep what’s left in those. From those, we buy our clothes, our luxuries, and other personal expenses. In other words, there’s “my money,” “her money,” and “our money.” I used to make a lot more than than my wife, but she’s caught up, since she works for a ginormous biotech company and I work for an impoverished pharmaceutical startup. This change has had no effect.
Since the kid was born, our expenses have gone up, and sometimes the joint account can’t cover expenses right away. In this case, we move some money over from an individual account. If it’s just a little, it’s forgotten; a big chunk of money would probably be paid back. I like the individual account, because I know I can spend money on a new computer or lots of books without impoverishing “us.”
The issues in the OP:
“Whose (expensive) whisky is it? You bought it, but your SO finished with friends, which are not entirely your friends. (substitute whisky with car, space, equipment, or other stuff, as needed)”
*If I destroyed my wife’s expensive goody, or vice versa, I’d be expected to fix it, replace it, or (if the first two options are impossible) apologize profusely and do stuff to make up for it until the emotional bank account is refilled.
“You earn more or less then your SO, but neither of you wants to make a big deal out of it.”
*We don’t. We pay equal percentages, and we don’t discuss whose money makes up most of the joint account. I think it behooves me, as the slightly richer partner, to be generous: I will often put things like dining out on my card instead of our card. But I don’t talk about it.
“You both earn money. You’ve made a division of who pays what. Yet, you also both feel you contribute ever so slightly more then your SO does. This feeling is only ventilated during really nasty quarrels, but you sometimes suspect it is lurking in the backs of both your minds.”
Doesn’t happen. If my wife brought it up (as in “your percentage has fallen behind”), I’d either agree (and change it) or disagree (and offer reasons why)
“You want to buy some personal luxuries. Do you buy them with household money, pocket money, your “own” money?”
My own money. This is why I have my own money to begin with.
“What do you do with all those receipts, clogging up your wallet ?”
*I throw them away. I keep receipts that I might need for warranty or tax purposes, but most purchases are made from the appropriate account, and don’t need reconciling.