After having serious issues with my last tenant and letting company resulting in me being £950 out of pocket i took my house off the rental market. This is my only property as i work overseas for the FCO and free accomodation is provided. My property remained empty for about a month and then my daughter asked if she and her fiancee could live in the house as there rent was £750pcm. I said yes they then stated that they would happily pay me £450 pcm so as not to be seen to be accepting charity. They also pay council tax etc. Do i have to declare this money to the tax man or is it like getting kids that live with you to contibute to living there etc.