I currently live with my fiance and he makes a lot more then I do as I am still a full time college student and only work part time.  He already graduated from college and is a junior engineer.  The agreement was when he wanted me to move in with him, was that he would pay for the apartment and everything that went with it, as the amount I work only covers my bills and school.  Sometimes I feel guilty about not paying rent, but then I think about the fact that he wants me to live with him and that once I'm done schooling I'll eventually make much more then him and then I'll be the one paying more.

He makes about 60% of our income, we don't split up who pays what. We'd never split up who pays what bill, our checks go into the same account and it's our money and our bills to pay.

All of my living experiences have been either home or dorm, so I don't have any experience with splitting money.  However, I do make more than my mother and I pay for more than she does.  My dad is still the one who makes by far the most money out of all of us.

I lived with my ex for a while.  We split everything 50-50, despite the fact he was making significantly more than me both before I went back to school and obviously while I was in school.  Most others thought this was an odd arrangement, but my pride wouldn't let me do it any other way.  It ended up biting me in the ass when we broke up.

My current boyfriend and I do not live together, and I plan to keep it that way until after we're engaged.  After that point, I think it'll be more realistic for us to create a joint account & contribute based on income.  Until I get really settled in my career, we'll be making roughly the same amount of money, so there shouldn't be huge discrepancies between contributions & expenses.