Can a self employed dentist who works as an associate in someone else's dental practice say 2 days (earning say £6k a month after lab fees etc but before income ax and NI) use that income to help setup his own dental surgery by reducing his tax liability when it becomes due, by paying towards the cost of a lease of e.g. £3k per month?
What if the dentist is also a director of dormant company, can he somehow use that self employed income to pay for the lease whilst working in his new practice for the remaining 3 days but all billings going to his limited company? My guess is that you cannot and that each employment (self employed business) has to be distinct from working as an employee in the limited company as a director? What is the most tax efficient way of combining the two roles so that one can write off the tax from the self employed income whilst generating income in the limited company?