For the past 6 months I have been tutoring through an agency, maths and science up to gcse, including pupils at a top independent school working towards an A*. I've had excellent feedback but due to agency fees only earning £18 per hour (less in fact when transport time/costs and prep work are taken into account). I believe the parents pay a much larger sum but I do not know how much. Now I have been asked to tutor a couple of gcse students referred by a teaching friend. I am based in Cambridge, no teaching qualifications but a Cambridge science degree (and excellent feedback from parents). How much do I charge? Is £25 an hour reasonable and do I add transport costs?