<prompt> Human: My girlfriend has been looking into a mortgage for a year or so. We have been dating for 7 months. Recently we have talked about me moving in with her. The mortgage is roughly 600 a month. She is 22 and I am 24; I have not considered getting my own mortgage at this time, so joint isnt something I am interested in; and she wants her own house anyways. She is looking into both one and two bedrooms. What percentage should I pay? I am prepared to pay half as it logically seems fair, but part of me feels a bit uncomfortable with it because there would be no gain on my behalf. Should I pay less if the house is a one bedroom and more for a two bedroom? Should I feel guilty for being uncomfortable with my lack of financial gain in the situation? Obviously utilities will be split evenly..but I am unsure on where I should stand in terms of paying off the mortgage.Assistant: So, if you werent living with her, youd be renting?It seems like half is fair. When you rent, youre paying someones mortgage, but in this case its your girlfriends.Human: We both are currently living at our family homes for the last year.Assistant: Are you financially able to contribute equally to the household or will it derail you in some way?You should be trying to support one another, not profit from one another, so if your goals make the extra 300 a stretch, be honest, and see if she would rather have you there with a smaller contribution.Human: It is a stretch for me to pay 5050 on everything but possible. I actually am happy to pay half. We have no problems splitting other expenses equally. However, I have been imagining a few scenarios in which I would feel quite hard done by, and could see causing issues. She does not plan on living in the flat for 5 years-she wants to up size. The problem for myself I see here is at the end when she sells, assuming we are together, I have equally contributed to the equity yet would have no claim to the profit. Is it reasonable for me to suggest I get a percentage of the profit at the end not 50 as she would be responsible for any maintainence issues and took the risk of putting her name on the loan? Another scenario is if we broke up, it seems this could cause an extra level of pain and resentment if I were to have payed half. Perhaps this is something I would have to just come to terms with before I moved in?You should be trying to support one another, not profit from one anotherThat is my main concern really. While I am the type of person who always pays their way, something in me feels like I would be being profited on, whether consciously or not. And that makes me feel uncomfortable. I dont suppose you have any ideas on how to make this arrangement work, without me contributing directly to the equity of the house, yet still paying my way, and thus having no expectations of profit or feeling hard done by?  <response>: Are you going to take half the loss if the property loses value? Shes taking the risk she gets the reward. 