<prompt> Human: Im 24 and I was very frugal with my money throughout college and because of the money I had saved some stayed in mutual funds and recently boomed. I now have about 60k and change and I want to buy into my fiances house. She bought it recently for 410k with 100 down but just put into it about 30k. Right now I live with her and pay 1k a month for rent because her kids also live here but I do a lot of maintenance on the house and want to be part of it. Does anyone have experience on buying half ownership and mortgages for this sort of thing?I can probably get the extra money for the down payment borrowed or possibly pay a higher percentage in mortgage.Also does anyone know a fair way to split a mortgage payment if we did each own half because she gets 2.3k a month for child support and her kids live here.  <response>: Youre not going to get a mortgage for half a house. If she wants you on the mortgage, she needs to refinance with you on the mortgage. If she wants you on the deed, she can just add you. The banks interest in the property still comes first, but you would be listed on the deed as well. It would be a foolish thing for her to do honestly.Youre engaged, so just wait till you are married and refinance with you both. Or just leave it alone if she has a good interest rate. However you want to split married finances and mortgages is really a personal opinion. My opinion, you are married, all the money belongs to the both of you. I dont understand how her child support come into play or how owning half makes sense. I purchased my house before I met my wife. When we got engaged, and then married, it became our house. I havent added her to the deed, nor have we refinanced. The mortgage gets paid out of the sum of the money the household made for the month. Whomever contributes the most to that fund is inconsequential; its our plural money. 