My SO and I have known each other for several years, dated for one. We're talking about me moving in to the house he owns, and we're looking for a fair way to split expenses.

Due to some of the household and relationship dynamics, we’re not sure what would be fair. Here are the factors we’re currently considering:

- House is 2,000 square feet: 4 bedrooms, 2.5 bathrooms, kitchen, dining, living room, 2-car garage.  

- He has two kids who spend about half of their time with him: they each have one bedroom.

- The guest bedroom would be my space, and the loft would be his.

- The rest of the space would be shared between him, me, and the two kids (when they’re home).

- We are both financially secure, but he makes nearly three times as much as I do (but he also has more expenses, such as child support and financial aid to his parents). Should our difference in income even be a consideration? I could afford half of everything, and it would cost me about what I spend now. However, since my SO will benefit financially if I move in, I feel it would be fair for me to, as well. 

What say ye, reddit? What percentage of the mortgage and bills should I pay if I move in? Are there any other factors we should consider other than what I listed?
user
Moving in with SO who owns home, makes more money than I do, and has 2 kids half the time. What percentage of the mortgage
assistant
My SO and I have known each other for several years, dated for one. We're talking about me moving in to the house he owns, and we're looking for a fair way to split expenses.

Due to some of the household and relationship dynamics, we’re not sure what would be fair. Here are the factors we’re currently considering:

- House is 2,000 square feet: 4 bedrooms, 2.5 bathrooms, kitchen, dining, living room, 2-car garage.  

- He has two kids who spend about half of their time with him: they each have one bedroom.

- The guest bedroom would be my space, and the loft would be his.

- The rest of the space would be shared between him, me, and the two kids (when they’re home).

- We are both financially secure, but he makes nearly three times as much as I do (but he also has more expenses, such as child support and financial aid to his parents). Should our difference in income even be a consideration? I could afford half of everything, and it would cost me about what I spend now. However, since my SO will benefit financially if I move in, I feel it would be fair for me to, as well. 

What say ye, reddit? What percentage of the mortgage and bills should I pay if I move in? Are there any other factors we should consider other than what I listed?
user
Moving into SO's house, and we're not sure how to split expenses.
assistant