<prompt> Human: I know this question has been asked in the past, but reddits search algorithm isnt great and I didnt find anything that fully answered my question. Please redirect me if appropriate.nbsp;I currently own my house. The mortgage is about 40 paid off and I anticipate paying it off in 5-10 years.nbsp;My SO and I have been dating for about a year. Weve begun to discuss moving in together which we would like to do in the next 6-12 months.nbsp;My mortgage payment is about 400month. My SO currently pays 450month to rent his apartment.nbsp;He has proposed to split my mortgage payment and all bills 5050, with me being solely responsible for property taxes, insurance, and all incidental costs repairsetc.nbsp;I am concerned about income taxes and financial not moralrelationship fairnesscommon sensebest practices. nbsp;Taxes: I have never rented my house out, so I have never had to report rent as income. Because the amount I would receive is so small, below market, not for profit is it even worth reporting on my income taxes? Could easily be a 35-50week gift... Assuming that I do have to report it, is it best to just have my SO cover say the utility and grocery bills to avoid this? nbsp;Fairness: My SO is happy to split things 5050 because it would be less than half what he is paying now, and is well below market. I am concerned because: nbsp; I make roughly 2x what my SO makes. I also own the home, so the mortgage payments are going to me and he would have no equity. If we were to break up, this would be a gap in rental history for him. I know rent payments dont typically affect credit scores but I dont want to adversely affect his ability to the rent in the future.nbsp;I am interested to see if anyone has been in a similar situation, and how they handled it.  <response>: The most straightforward solution is to figure out what the entire house would rent for on the open market. Then ask SO to pay half of that. You pay everything else taxes, repairs, etc. You can adjust downward a bit if youd like, espeically if the house is more lavish than SO would want without you in the picture.But I would stick to a specific monthly amount, leaving you responsible for all repairs. Otherwise, its messy. When is a repair required vs. optional? When the refrigerator dies, do you want the cheap 400 unit, or the 2000 one? 