[rodolphoarruda]

I have a wife and 2 pre teens at home.

All of our fixed costs are shared in a way to promote an equal amount per month per person. For example, I pay my daughter school's tuition and my wife pays of my son's. I pay Netflix, she pays Prime Video, so on and so forth.

For market and groceries, we have a credit card account with two cards. This was a game changer for our home expenses management. I have the total spent per month on a spreadsheet and can see how things are going, especially in regards to inflation, currently at 19%/y where I live.

Everything else like going out with friends, small indulgencies, fuel etc. each one of us would cover his/her own expenses.