Haileybury 13+ Tutoring — Expert Year 9 Entry Preparation 2027

Haileybury, located near Hertford in Hertfordshire, admits approximately 70 new pupils each year into Year 9 — known at Haileybury as Removes. The 13+ entrance process combines the school's own written papers in Maths and English, an online CAT4 cognitive abilities test, and a one-to-one interview. There are two distinct routes: the Early 13+, taken in February of Year 6, and the Main 13+, taken in January of Year 7. For the current cycle, the Main 13+ registration deadline is Friday 18 December 2026 and the examinations take place on Friday 22 January 2027.

Haileybury is a co-educational independent school for boarding and day pupils aged 11 to 18. With over 880 pupils on roll, of whom more than 550 board, it is one of the larger Hertfordshire boarding schools and offers a broad curriculum through to GCSE and A Level, alongside the International Baccalaureate Diploma in the Sixth Form. The campus occupies a historic estate in the Hertfordshire countryside close to the town of Hertford, approximately 20 miles north of central London.

What Does the Haileybury 13+ Entrance Process Involve?

The Haileybury 13+ assessment has three components, all of which must be completed as part of the formal application process.

The first component is Haileybury's own written papers in Maths and English. These are set by the school to assess fundamental understanding of each subject — the Maths paper tests problem-solving ability, numerical fluency and mathematical reasoning at a level appropriate for the end of prep school (Year 8 standard), while the English paper tests reading comprehension, written expression and command of language. These are not the ISEB Common Pre-Test used by many other independent schools for 11+ or 13+ entry; they are Haileybury's own bespoke examinations, and the school provides sample papers on its admissions website.

The second component is the CAT4 (Cognitive Abilities Test, 4th edition), an online, age-standardised and adaptive assessment of reasoning ability. The CAT4 comprises four batteries: verbal reasoning, non-verbal reasoning, quantitative reasoning and spatial ability. It is not a knowledge test — it does not assess what a pupil has been taught, but rather their underlying cognitive abilities and potential. Because it is adaptive, questions become progressively harder as correct answers are given, meaning the test adjusts in real time to each candidate's performance. The score is standardised against the candidate's age, and Haileybury uses the results alongside the written papers and interview to build a holistic picture of each applicant.

The third component is the interview. Every applicant has a one-to-one interview with a member of Haileybury staff. The interview is designed to be conversational rather than adversarial — the school describes the assessment day as deliberately pressure-free, with applicants given time to get to know each other and enjoy lunch in the Dining Hall. The interview assesses personal qualities, intellectual curiosity, articulacy and motivation. Pupils who are widely read, engaged with ideas beyond their school curriculum, and able to discuss their interests and experiences with confidence tend to perform well.

The assessment day takes place on site at Haileybury's Hertfordshire campus where possible, though international candidates may sit their entrance examinations remotely under the invigilation of a Haileybury staff member, or at offices of the British Council or a lawyers' office.

What Is the CAT4 Test and How Should Your Child Prepare?

The CAT4 is produced by GL Assessment and is one of the most widely used cognitive ability assessments in UK independent school admissions. For many families, it is an unfamiliar format — unlike a knowledge-based subject exam, there is no fixed syllabus to work through. Preparation instead focuses on developing reasoning skills and building familiarity with the question types and computerised format.

The four batteries of the CAT4 each test a distinct type of reasoning. Verbal reasoning questions assess a pupil's ability to think logically with words — typically through analogies, word relationships, sentence completion and identifying patterns in verbal information. Non-verbal reasoning questions present patterns, sequences and shape relationships, requiring pupils to identify rules and apply them without relying on language. Quantitative reasoning tests numerical reasoning and mathematical logic — closer to problem-solving than straightforward arithmetic. Spatial ability assesses the capacity to manipulate shapes and figures mentally, including rotating objects, folding nets and identifying 3D representations.

Because the CAT4 is adaptive, pupils cannot skip ahead or return to previous questions, and the difficulty of what they face next depends on how they answered the previous question. This makes exam technique particularly important: pupils must pace themselves, resist the temptation to dwell too long on any single question, and remain calm when questions become significantly harder — a sign that they are performing well, not struggling.

Effective CAT4 preparation involves consistent exposure to each question type through practice materials, developing strategies for approaching unfamiliar questions methodically, and building confidence with the computerised, timed format. Unlike knowledge revision, this kind of preparation takes several months to have a meaningful effect — short bursts of intensive drilling in the weeks before the test are significantly less effective than sustained, well-spaced practice over a longer period.

What Are the Key Dates and Deadlines for Haileybury 13+ Entry 2027?

Families should register directly with Haileybury's admissions department. Upon registration, the school requires a copy of the child's latest school report and a copy of their passport. International applicants may additionally be asked to sit a UKiset test to assess functional English ability ahead of the entrance examinations. The full admissions process is described on the Haileybury 13+ admissions page.

Early 13+ vs Main 13+: Which Route Is Right for Your Child?

The two routes to Haileybury Year 9 entry differ principally in timing and competitiveness. The Early 13+ takes place in February of a candidate's Year 6, meaning children are assessed approximately two and a half years before their proposed entry date. Haileybury explicitly states that the Early Tests route is highly competitive and that only a small number of offers are made at this stage. The route is designed primarily for children attending UK prep schools, where the academic and preparedness level expected of Year 6 pupils is typically higher than at maintained primary schools.

The Main 13+ examinations take place in January of Year 7 — approximately 20 months before the September entry date. This is the principal route, carries more places, and is open to all applicants regardless of school type. Offers made through the Main 13+ are unconditional and confirmed at the time they are issued. Importantly, candidates who are unsuccessful through the Early 13+ route are fully eligible to reapply through the Main 13+ when they reach Year 7 — an unsuccessful Early result does not preclude a later successful application.

Following the Main 13+ examinations, Haileybury continues to accept registrations and assess candidates for as long as places remain available. This means families who register later in Year 7 may still be considered, provided places have not been filled. However, the school's preference is clearly for timely registration before the December deadline, and the most competitive applicants tend to register and prepare well in advance.

For most families, the choice of route depends on practical readiness. A child who is genuinely well-prepared academically and emotionally by Year 6 may benefit from the Early 13+ — an early secured place removes uncertainty from the final years of prep school. A child who needs more time to develop, or who is applying from a non-prep background, is better served by the Main 13+ route with its larger pool of places and less extreme time pressure.

What Is Haileybury Like as a School?

Haileybury was founded in 1862 on the site of the former East India Company College, and its Victorian campus in the Hertfordshire countryside near Hertford gives it a distinctive architectural character. The school sits on a substantial estate and offers extensive facilities — including a dedicated STEM Research Centre, sports pitches, a theatre, and a wide range of co-curricular provision. It is a member school of the Headmasters' and Headmistresses' Conference (HMC), the body representing leading independent schools in the UK.

With over 880 pupils across all year groups, Haileybury is genuinely large for an independent boarding school. More than 550 of those pupils board, giving the school a strongly residential character, and the house system plays a central role in pupils' daily lives. There are separate boarding houses for boys and girls, and the housemistress or housemaster is the primary pastoral figure for each pupil. Day pupils are attached to a house and participate fully in the house community.

Academically, Haileybury offers a broad curriculum through to GCSE and A Level in the Sixth Form, alongside the International Baccalaureate Diploma — making it one of a smaller number of UK independent schools where pupils can choose between A Levels and the IB. The school has been named among the top global IB schools and was recognised by TES as Boarding School of the Year. Sixth-form leavers progress regularly to Russell Group universities, with a proportion each year to Oxford, Cambridge and leading overseas institutions.

Co-curricular provision is extensive. Sport is a particular strength — Haileybury has a long cricket tradition and is listed among The Cricketer's top 100 schools, and there is strong provision across rugby, hockey, tennis and athletics. Drama, music and outdoor activities are also central to school life. The CCF (Combined Cadet Force) and service and volunteering programmes give pupils opportunities beyond the purely academic.

Families considering Haileybury typically value the combination of a strong academic culture, broad co-curricular offer, and the depth of pastoral support that comes with the boarding house system. For those comparing it against other Hertfordshire independents, see also our guides to Common Entrance preparation and our overview of ISEB Pre-Test preparation for schools using that route, and our general 13+ tutoring hub for an overview of how we support families across boarding school entry.

How Should You Prepare for the Haileybury 13+ Interview?

The interview is a component that many families underestimate during preparation. Because Haileybury's written papers and CAT4 are assessable through structured practice, they tend to receive the bulk of preparation time — but the interview carries significant weight in Haileybury's holistic assessment and can differentiate applicants whose written scores are similar.

Haileybury's interviews are designed to be exploratory rather than prescriptive. Interviewers are looking for genuine intellectual curiosity, the ability to engage with ideas, articulacy and a sense of personality. Common themes include asking pupils about their interests, what they enjoy reading or studying, current events they find interesting, why they want to attend Haileybury, and how they would contribute to the school community. Unlike more formal academic interviews, the Haileybury interview is unlikely to involve set problem-solving tasks or unseen texts — though candidates should expect to discuss their ideas substantively rather than superficially.

Preparation for the interview should begin several months before the assessment day. Pupils benefit from being encouraged to read widely — including quality newspapers, books beyond the school curriculum, and non-fiction on topics they find genuinely interesting. They should practise speaking clearly and at length about subjects they care about, and be prepared to respond thoughtfully when challenged or asked to develop a point further. Mock interviews, conducted by someone unfamiliar to the pupil, help build the comfort with formal conversation that makes the real interview feel less daunting.

Parents can support interview preparation by having regular conversations about ideas and current events at home, encouraging children to form and articulate opinions, and ensuring they have visited Haileybury's campus before the assessment day — familiarity with the environment reduces anxiety and allows pupils to speak authentically about why they want to attend the school specifically.

Frequently Asked Questions About Haileybury 13+ Entry