My son's IGCSE English Language tutor charges £38 an hour.
Bear in mind she's taught KS3, GCSE, and A Level English for 28 years, and has been an examiner for Cambridge, AQA, & WJEC GCSE, IGCSE, and A Level English for over 10 years. She has a degree and masters degree in English, plus a PGCE with QTS.
So she's a very very qualified English tutor.
I'm sure some other tutors with less qualifications would charge less. You don't necessarily need to have done a teaching qualification, or a masters degree, or have worked as an examiner to be a tutor, so I'm sure you could find a cheaper one.