Right, I did some work that I wasn't expecting payment for. My client (an old employer) agreed to pay me £200, but I need to know how to get it through the books. I am employed full time but may try to get a few more wee projects over the coming months. So my questions: 1). Do I need send an invoice? 2). If so, does it need to come from a registered company and do I need to register as self-employed/sole trader 3). Do I need to register a company? 4). Do I need a company bank account? Thanks in advance!