<prompt> Human: I bought a house this year with my girlfriend. Its 100 in my name, I pay the mortgage etc, but when we bought the house she said she would help pay for that mortgage. Well she gave me a check for this year, and I was wondering if I need to pay taxes on that. I dont see it as an income, its more of a cost sharing, but I dont know how the government views it. EDIT: The amount she pays covers electricity, cable, and gas.EDIT2: The amount she pays just happens to be equal to what utilities cost. The money goes in my savings so it cant be determined what that money is being used for.  <response>: Yes its income, no you will not get caught for not reporting it. 