<prompt> Human: Hello, my GF is going to move in at the end of December. I purchased the place a few years ago. It will be our place and she doesnt want it to be paying me a rent check. Wants to be paying expenses together. I do rent out my basement and claim it as income on my taxes.--- Mortgage 579.99month Property tax 206.34month Internet 70month Home insurance 37.70month Utilities 160month ranging 250-95 currently Rental income 550month---There are obviously other expenses like groceries and home supplies TP. We do tend to eat and cook dinner together. My average grocery cost is 120month for myself and dont eat out. Now I obviously have a lot of sunken costs in the house and Im currently getting the equity also. I really dont want to over complicate this, but I dont want her to feel like shes paying rent. So, I feel like we need to split we need to split the variable costs like utilities, groceries, home supplies, and probably add internet to the mix. Thank you, any help would be appreciated as I know Im probably looking at this through blinders.  <response>: I really dont want to over complicate this, but I dont want her to feel like shes paying rent.She is paying rent. Thats whats going on. She needs to be a rational adult and recognize the situation. Pretending like she owns part of the house just makes things immature and messy. What is she pays half the mortgage for a couple months then breaks up with you? Does she get half the house? Can she force you to sell? If she wants to buy out half your equity and refinance the house in both your names you can talk about that its a stupid idea. But otherwise, its YOUR house. Shes paying to live in YOUR house. Shes paying rent. 