* Where you retake it: Private tuition is considerably more expensive than retaking through a college or adult education centre. A college or adult education centre might be free or charge a relatively small fee, depending on your location and eligibility (e.g., based on your age or income). Private tutors can charge anywhere from £20-£100+ per hour.
* Number of subjects: Retaking one subject is cheaper than retaking several.
* Exam board: Exam board fees can vary slightly.
* The type of course: Some courses might offer bundled packages including materials and tuition.
In summary: You could potentially retake a GCSE for free (or a very low fee) through a college or adult learning center, or it could cost several hundred pounds or more if you opt for private tuition. To get an accurate cost, you need to contact the specific college, adult learning centre, or tutor you're considering.