<prompt> Human: My gf and I have been together for just over 4 years now, and we plan on moving in together next spring May 17.We started talking last night about how to go about moneycosts for this new situation, and we each have opposite opinions on how things should be split. Heres how things stand currently, I make roughly 30k with a side job starting soon while she makes roughly 60k With a side job as while. She proposes that split all bills 5050. Rent, utilities, groceries, internet, should all be split equally, so that we have equal ownership and rights to the apartment. I propose that we split all bills proportional to our incomes whatever they may be at that point so that each of us are losing the same rough of our income to our basic costs. We each have longer explanations for our beliefs, and our financial situations are much more complicated, but I wanted to keep this basic as to focus on concept more and not bias either side of the argument. So Im asking everyone here, which method do you use? Pros and cons? If needed I can provide more details on where our current income goes and our projected earnings by that point in time, and if shes interested we can each elaborate further for each side, but I didnt think it was needed.  <response>: So, unless you put a ring on it, you should split the bills 5050.What does that mean? It means you live in a place where the poorer of you can afford their half. If the richer person then suggests that you can afford better, they need to cover the better lifestyle. So, you live like you guys are 60k kind of couple. If she want a nice dinner out that you cant afford...she pays. If she wants fancy mirrors all over the place, she pays. But, for the basics you pay 5050.In other words, you act like you two have a combined income of 60k and use that as a basis for where you live.Once you get engaged andor married, then you base your lifestyle on the real total income of 90k. 