Hi I have a friend who has a spare-time business - an online dating website he started with another friend abut a year ago. The website allows free and premium (paying) members. They currently have only about 15 paying members - but in the last 6 months have earned approximately £500 from paying memberships. They haven't formed or registered any kind of company in the UK yet and are trying to work out how to take the business forward as they have some advertising campaigns coming up. My question is it it illegal for them to be earning money from the website or have the business running without it being registered as a company? I think it is but he thinks that as they have not earned much money it is not necessary to register or form a company until they do. What about the income - does that have to be taxed and who would it be taxed under if there are only 2 people in the business and even if it is only about £500 for the year?