I had a side job tutoring one student on the SATs and later helping write college essays. In my mind, it was only worth it if you could avoid working for a tutor overlord, aka, tutoring service, Kaplans, Princeton Review or any of those outfits. I was in a HCOL area and charged $175 an hour with a minimum 2 hour session. The student did great, the pay was enough to be worth it to get to the student's house, and pay for the prep I would do between sessions. I think we met twice a week for 10 weeks to prepare for the test. The student scored in the 2300's when the SAT was scored out of 2400. To turn this into a career, I think you need to have a reliable relationship with a private school to get referrals, and you HAVE to deliver results for your students, which often meant teaching beyond the test, and also coaching in test taking behaviors, stress and time management, ordered thinking techniques, etc. I hope this helps. Referrals are the key. In tutoring for tests, it's also imperative to get a top score yourself and to take the test yourself to empathize with the testing pressures students are under. Hope this helps.