I am a PAYE employee on €24k a year. Normally would be on a higher salary but when my last contract finished I took this position so as to have some income coming in. Since then, a friend has asked me to help her out for her start up company and I will get €12 an hour. What is the best way for (a) me to receive payment for this and (b) for her also re her books? It will be maybe 150-200 a month. Do I need to set myself up as a company to invoice her? Thank you in advance.