Booking an exam as a private candidate looks simple: pick a subject, pay, turn up. Most problems happen in the gaps between those steps, and they tend to surface at the worst moment, in the week of the exam or on results day.
None of the mistakes below is unusual, and every one of them can be avoided at the booking stage.
Exam boards publish entry deadlines, and it is easy to assume those are the dates that matter. For the June 2027 series, the boards' deadline is 21 February 2027, according to the JCQ key dates.
Centres set their own deadline earlier, so they have time to check and submit every entry. At Private Exams Centre, the standard deadline for June 2027 is 15 February 2027. From 16 February, late fees apply, and from 16 April, high late fees. For GCSE Maths, that is the difference between £250, £320 and £395 for the same exam.
The deadline also decides refunds. Under our refund policy, a GCSE, IGCSE, AS or A Level entry cancelled before the first deadline is refunded minus £30 per paper. After it, nothing is refunded.
The fix: put the centre's deadline in your calendar, not the board's. Every series is listed on our exam entry deadline page.
"GCSE Maths" is not one exam. AQA (8300), Pearson Edexcel (1MA1), OCR (J560) and WJEC (C300U) each write their own papers, and a GCSE is a different qualification from an IGCSE in the same subject. Pearson Edexcel even offers two GCSE English Language specifications, 1EN0 and English Language 2.0 (1EN2), and you cannot be entered for both in the same series.
Tiers are a second trap. In GCSE Maths, Foundation tier covers grades 1 to 5 and Higher covers 4 to 9. Book Foundation when your course needs a grade 6, and the grade you need is out of reach before you start.
The fix: find the specification code on your textbook, course materials or past papers, and match it exactly to the code on our exam fees page. Decide your tier from the grade you need, not from what feels more impressive.
Every board offers two GCSE English Language entries: a retake, for candidates carrying forward an earlier spoken language result, and an entry with speaking, for those who need to complete the spoken language endorsement. At Private Exams Centre they cost £230 and £250 before the first deadline.
The mistake runs both ways. Some candidates book the retake without having an endorsement result to carry forward. Others pay for speaking when they already have a result from an attempt in June 2017 or later, which AQA allows to be carried forward from any board.
The fix: check your previous results slip or certificate for a spoken language grade before you book. If you are unsure, ask the centre.
Some subjects include work that has to be done at, or supervised by, the centre. GCSE sciences include required practical activities, and AQA states that the entering centre must make provision for private candidates to carry them out. A Level sciences report a separate practical endorsement. Subjects with coursework, such as A Level History, need the work supervised and authenticated.
Leave it too late and the chance may have gone: at Private Exams Centre, GCSE practical sessions run in the spring half term, so a candidate who realises in April has missed them for that summer.
The fix: check the specification for words such as practical, endorsement, non exam assessment or coursework before you book. Our GCSE science practical sessions run over two days per subject during the spring half term, in school laboratories in the London Borough of Newham. The A Level practical endorsement course runs over five days per subject. For coursework, our non exam assessment page recommends starting at least one month before the exam board's submission deadline.
If you need extra time, a reader, a scribe or another arrangement, the request has to be made with your entry, not shortly before the exam. JCQ's guidance for private candidates says access arrangements must be arranged with the exam centre at the time you make your entry. The centre then needs evidence and has to submit the application by JCQ's deadline, which for June 2027 is 21 March 2027.
The fix: mention any access arrangement in your first contact with the centre, and gather your evidence before you book.
A centre that has not taught you has no other way of knowing who you are. JCQ's Instructions for Conducting Examinations require private candidates to show original photographic evidence of identity, such as a passport or photographic driving licence. A photo of your passport on your phone is not the original, and phones are not allowed in the exam room anyway.
The less obvious problem is a mismatch between the name on your ID and the name on your entry, after a name change or with a different spelling.
The fix: register using the name exactly as it appears on your photo ID. If you have no photo ID, contact the centre before you book to agree an alternative.
Once your entry is made, you receive a statement of entry. It shows exactly what the exam board thinks you are sitting: subject, board, specification code, tier and options. An error there becomes an error on exam day.
Then there is the timetable. In a summer series, papers for one subject can be weeks apart, and some days have papers in both the morning and the afternoon. Journeys across London can take longer than expected at peak times, and JCQ does not accept misreading the timetable as grounds for special consideration.
The fix: check the statement line by line as soon as it arrives. Then put every paper in your calendar with its session, plan the journey to the centre in advance, and keep the contingency day, 23 June 2027, free.
If you are still choosing where to sit your exams, our checklist for choosing a private exam centre in London covers the questions worth asking first. For the full booking process from start to finish, see our guide to booking GCSE and A Level exams for 2026/2027.
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Updated 28-July-2026
