<prompt> Human: Hi! I know theres plenty of similar posts out there, but couldnt see one that matches exactly. I earn 26k in a stable full-time job. My partner of 6 months is a zero-hours worker with variable shifts, averaging about 12k a year but could theoretically earn nothing in a month. I recently bought my own home. Due to circumstances beyond his control, he has to move out his parents house where he only pays 100 digs. We have talked about moving in to my flat - a little sooner than Id have planned, but Im OK with the theory.However we cant agree on how to split the expenses. My mortgage is 400 a month, all other essential household expenses before foodsocial around 150. Most of the time he could afford to half this, but he finds it very unfair to split the mortgage in half when the flat is 10037; mine. I sort of agree, as we have already agreed that if we break up he obviously gets no stake whatsoever and would just leave, but I feel that considering hed pay at least 5 or 600 a month in rent and expenses in our area to flatshare, its not unreasonable to pay a proportion. He doesnt often take all the shifts available to him, and could earn more if he tried, but admits hes lazy and is not trying to get full-time work. I have previous of awful relationships, and dont want to feel in future that hes lived off me and resent it. However considering my past experience, I dont know if Im being over wary, as I can be hyper sensitive and have some trust issues! If we were married Id be happy just to pool our money, and I have no plans to break up, but also being realistic we havent been together long enough to stake my future on it. In this situation, what would you consider fair? Thanks in advance :  <response>: but he finds it very unfair to split the mortgage in half when the flat is 100 mineHe should pay half the market rent of a similar flat. This may end up being more than what he is currently paying. . He doesnt often take all the shifts available to him, and could earn more if he tried, but admits hes lazyThis is why you shouldnt play house. All this relationship stuff doesnt matter. He is a tenant of yours, and regardless of how much he wants to work or not, is expected to pay rent on time and in full. 