Charterhouse
Independent boarding and day school (co-educational) · Est. 1611
Charterhouse is a selective co-educational boarding and day school where the admissions filter is deliberately wider than a raw exam score. The practical admissions challenge is to clear ISEB or digital academic screening, then show teachability, group contribution, writing fluency and genuine all-round fit in the school-based assessment.
For Charterhouse, prepare the child who can think, write, collaborate and live well in a busy boarding community.
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Godalming, Surrey GU7 2DX
Main Entry
13+
Year 9 senior-school intake
Exam Provider
ISEB
Common Pre-Test for 13+ first filter
Boarders
893
of 998 pupils in ISI 2024
Sixth Form Results
60%
A*-A / IB 6-7 equivalent in 2025 overview
GCSE 9-7
76%
2025 official overview
Fees
GBP 20,016
boarding termly, 2025/26 inc. VAT
Best For
Curious, socially confident pupils who can combine adaptive-test accuracy with genuine boarding-school readiness: group work, discussion, independent organisation, creative writing and a real appetite for co-curricular life.
Watch Out For
Families often over-prepare only for the ISEB Common Pre-Test. Charterhouse's own second stage matters: interview, group activities and a creative-writing assessment at 13+, plus observed seminar, short written exercise and 1:1 interview at 16+. The school reference and house/boarding fit are also part of the decision.
Entry Points
- 13+ Year 9 is the main senior entry; 11+ is a linked prep-school pathway through Edgeborough or Windlesham House; 14+ and 16+ routes are also published.
The Complete Admissions Timeline
Every key date, deadline and decision point — with insider intelligence you won't find on the school website. Click any item to reveal verified insider knowledge.
The critical window:
Charterhouse Published Admissions Dates
- 1
11+ linked pathway registration deadline
30 September in Year 6
- 2
13+ ISEB Common Pre-Test
Autumn Term Year 6
- 3
13+ Interview and Activities Assessment
Spring Term Year 6
- 4
13+ offers
March Year 6
- 5
16+ digital testing
24 September to 6 October 2026
- 6
16+ assessment day
Friday 13 November 2026
- 7
16+ offers
1 December 2026
- 8
16+ scholarship assessments
9 to 12 November 2026
Inside the Charterhouse 13+ and 16+ Assessment
Charterhouse is an ISEB-first school at 13+, but not an ISEB-only school. The Common Pre-Test screens Maths, English, Verbal Reasoning and Non-Verbal Reasoning online; shortlisted pupils then attend Charterhouse for interviews, group activities and creative writing. Sixth Form is different: digital literacy, numeracy and reasoning tests lead into an observed seminar, short written exercise and 1:1 interview.
ISEB Maths
Part of approximately 2.5-hour ISEB Common Pre-Test sequence · Online adaptive multiple choice
Pupils who can solve untimed prep-school maths sometimes lose adaptive-test marks through slow starts, weak mental arithmetic or overworking MCQ options.
ISEB English
ISEB English section plus separate creative-writing task at assessment · Online adaptive ISEB English; school-based written assessment for shortlisted pupils
Families prepare comprehension but neglect spelling, punctuation, grammar and controlled creative writing.
VR + NVR
Part of ISEB sequence · Online adaptive verbal and non-verbal reasoning
Random mixed practice creates false confidence. Systematic question-type mastery is safer for Charterhouse because ISEB is the first gate.
Assessment Day
13+: Spring Term assessment afternoon/day; 16+: Friday 13 November 2026 assessment day · 13+: group activities, friendly interviews and creative writing. 16+: observed seminar, short written exercise and 1:1 interview.
Over-coached candidates can sound polished but fail to listen, build on others' ideas or write with authentic voice.
Topic Difficulty & Weight
Difficulty (%) and exam weight by topic area
Key takeaway: Maths is adaptive and online, so small early weaknesses can change the difficulty path. The trap is not only content gaps; it is pace, stamina and not panicking when the level rises.
Topic Breakdown
Known Exam Traps — ISEB Maths
Train calm first-five-question discipline: read twice, estimate, eliminate impossible options, then answer.
Practise timed triage: solve, estimate, or move on. Review whether the child is losing more marks to stubbornness than ability.
The pattern: Pupils who can solve untimed prep-school maths sometimes lose adaptive-test marks through slow starts, weak mental arithmetic or overworking MCQ options.
If you can only improve in one area, make it
Adaptive maths accuracy under ISEB timing
What this means in practice:
Dedicate 60%+ of prep time to this area
Practice under timed conditions regularly
Review mistakes immediately after each session
Track progress weekly to spot patterns
All focus areas ranked by impact:
#1
Adaptive maths accuracy under ISEB timing
ISEB Maths
#2
Comprehension plus written voice
ISEB English
#3
Question-type fluency before mixed mocks
VR + NVR
#4
Discussion, writing and teachability
Assessment Day
Format
Duration
Approximately 2.5 hours across four areas
Answer Method
Results & League Table Position
Charterhouse consistently ranks among the top co-educational schools in England. These figures are benchmarked against national averages so you can see the full picture.
A-Level A* Rate
23%
Public A-Level breakdown not published.
A-Level A*/A Rate
57%
Use the narrative summary below.
GCSE Grade 9-7
76%
Public GCSE breakdown not published.
A-Level A*-B Rate
84%
Results support the academic strength of the cohort, but Charterhouse's admissions page is explicit that selection is not just score-led: interview, activity assessment, references, writing and all-round potential matter.
A-Level Results vs National Average
Charterhouse vs England average (%)
What this means: Charterhouse publishes combined Sixth Form headline results because it offers both A Levels and the IB Diploma. In 2025, the school reported 60% A*-A / IB 6-7 equivalent, 87% A*-B / IB 5-7 equivalent and 98% A*-C / IB 4-7 equivalent. The four-year A-Level subject PDF shows particular volume in Mathematics, Economics, Geography, Politics, Chemistry, History and Physics.
GCSE Grade Distribution
Charterhouse vs National distribution (%)
What this means: The 2025 GCSE overview reports 55% grades 8-9, 76% grades 7-9 and 87% grades 6-9. Subject-level detail shows especially strong 9-7 rates in Geography, Drama, Music, Religious Studies, Biology, Chemistry, Physics, French and History.
University Destinations
Where Charterhouse leavers go — % of cohort
Notable Academic Achievements
ISI 2024: all inspected standards met.
The September 2024 ISI report found the standards met for leadership/governance, education, wellbeing, social/economic education and safeguarding.
Fully co-educational since September 2022.
ISI 2024 notes the implementation of the move to coeducation is complete.
2024 destination profile includes strong Durham, London and North American routes.
The public destination page lists 13 to Durham, 11 each to King's and UCL, 7 to LSE, 5 to Imperial and 18 to North America.
League Table Position: Results support the academic strength of the cohort, but Charterhouse's admissions page is explicit that selection is not just score-led: interview, activity assessment, references, writing and all-round potential matter.
Interview, Activity and Seminar Intelligence
Charterhouse gives more public detail than many boarding schools. At 13+, successful ISEB candidates attend an Interview and Activities Assessment in Spring Term Year 6. The school says the aim is to get to know candidates through group activities, friendly interviews and a creative-writing assessment. At 16+, shortlisted candidates attend an assessment day with observed seminar, short written exercise and 1:1 interview.
Format
13+: interview plus group activities and creative writing. 16+: observed seminar, short-written exercise and 1:1 interview.
Duration
Not published for 13+; 16+ is a full assessment day on the published date.
Role in Admissions
The interview/activity stage is central because the official admissions page names it as the post-ISEB school assessment, and selection criteria stress the complete child.
This is a boarding-community interview, not a trophy recital
The strongest candidate can talk about real interests, recover from follow-up questions, listen well and show they will contribute to a house community. Memorised status answers are risky.
What Makes a Strong Impression
A good Charterhouse answer has specificity, humility and forward motion: what the pupil did, what they learned, what they would try next. A weak answer is a list of achievements with no reflection.
Confirmed and High-Confidence Themes
Compiled from parent reports (2023-2025)
- 13+ group activities
- 13+ friendly interviews
- 13+ creative writing
- 16+ observed seminar
- 16+ short written exercise
- 16+ 1:1 interview
- Current-school reference and predicted grades for 16+
- All-round contribution and complete-child potential
The pattern: Conversational, all-round and fit-led. The school is likely checking curiosity, kindness, teachability, independence and boarding/day contribution.
Never Asked — Don't Over-Prepare
- No reliable public evidence found of a fixed official 13+ question list.
- No reliable public evidence found that candidates need to bring a portfolio unless applying for a relevant scholarship route.
What Actually Wins Offers
- 1Explains interests with real examples rather than adult branding
- 2Can write with freshness and accuracy under light pressure
- 3Listens and builds in group activity
- 4Shows evidence of independence and organisation
- 5Can explain why boarding/day life at Charterhouse fits them
Insider Intel: What Other Parents Don't Know
These are the verified insights you will not find on the school website, in Good Schools Guide, or from any single tutoring agency. Each insight is compiled and cross-referenced from 15+ sources including official documents, parent reports, and tutoring industry data.This is the intelligence that gives ClassAce families an edge.
Do not confuse the 11+ pathway with direct Year 7 Charterhouse senior entry.
The 11+ route is a linked pathway through Edgeborough or Windlesham House for Years 7 and 8 before senior Charterhouse. This matters for families comparing direct 11+ London day schools.
Prepare ISEB early, but leave capacity for the Charterhouse stage.
ISEB is the first filter, not the whole process. Creative writing, interview and group activity need deliberate preparation.
Use the current-school reference as a preparation target.
Organisation, attitude, kindness and contribution can matter because the school explicitly reviews ISEB results with the reference.
Teach VR/NVR systematically rather than through random mocks.
Tutor-site guidance and ISEB structure both point to reasoning as a common unstable area. Question-family mastery beats repeated guessing.
Practise creative writing in the same term as ISEB prep.
Charterhouse names creative writing as the written assessment at interview/activity stage. Leaving it until after ISEB creates a late scramble.
For 16+, build seminar skills before the invitation arrives.
The assessment day includes an observed seminar. Candidates need to practise building on other people's ideas, not just answering interview questions.
Use A Level vs IB choice as a serious fit question.
Charterhouse offers both. A 16+ candidate who can explain route choice intelligently will look more self-aware.
Boarding readiness is not a soft extra.
ISI records nearly 900 boarders and detailed house/boarding systems. Candidates should be ready to discuss independence, kindness and contribution.
Late entrants need admissions confirmation, not assumptions.
14+ and late 13+ routes can exist, but exact places and testing are not fully public. Families should contact admissions before building a prep plan.
Treat bursary applications as both academic and family-assessment processes.
Bursaries can cover up to 100%, but Year 9 bursaries use ISEB, interview/activity performance, reports/testimonials and means-testing.
Benchmark against peers, not a mythical pass mark.
The school does not publish a pass mark. Use percentile-style diagnostics and compare preparation against boarding-school peers like Wellington, Marlborough and Cranleigh.
Common Mistakes Parents Make
The errors we see most often from families preparing for Charterhouse. Avoid these and you're already ahead of the majority of applicants.
Treating ISEB as the full admissions process
ISEB opens the door, but interview/activity assessment and writing are explicitly part of selection. Fix: build a four-strand prep plan.
Leaving creative writing until after the pre-test
Charterhouse's written assessment is creative writing. Fix: weekly short-form writing from the start of Year 6 prep.
Ignoring current-school habits
The current-school reference is used in the process. Fix: address homework, attitude, contribution and organisation early.
Over-coaching interview scripts
The interview is friendly and conversational. Fix: prepare examples and follow-up thinking, not memorised speeches.
Confusing day-school selectivity with boarding-school fit
Charterhouse is boarding-heavy. Fix: assess independence, social stamina and house-life readiness honestly.
Under-preparing 16+ seminar contribution
The 16+ assessment day includes an observed seminar. Fix: practise discussion behaviours as a discrete skill.
Choosing Sixth Form subjects for status
Charterhouse asks for proposed courses/subjects. Fix: connect subject choices to evidence of interest and strengths.
Relying on old co-ed assumptions
The move to coeducation is complete. Fix: compare Charterhouse as a current co-ed boarding school, not as a legacy boys' school.
Charterhouse vs Competitor Schools
How does Charterhouse compare to the schools your child is most likely also applying to? This analysis covers the key factors that actually matter to families.
Important context: ClassAce difficulty tier: very high for 13+ and 16+, especially for candidates who are strong on screen but underdeveloped in writing or group contribution.
| Factor | FeaturedCharterhouse | Wellington College | Marlborough College | Radley College | Winchester College | Cranleigh School | Epsom College |
|---|---|---|---|---|---|---|---|
| School Type | Independent co-ed boarding/day | Independent co-ed boarding/day | Independent co-ed boarding | Independent boys' boarding | Independent boarding/day | Independent co-ed boarding/day | Independent co-ed boarding/day |
| Co-educational | |||||||
| VR in Exam | |||||||
| Annual Fee | |||||||
| 11+ Difficulty | Very high | Very high | Very high | Very high | Elite | High | High |
| Interview Style | Interview/activity assessment | Assessment and interview | Assessment and interview | Assessment and interview | Assessment and interview | Assessment and interview | Assessment and interview |
Why Parents Choose Charterhouse
- All-round boarding cultureISI describes strong house spirit, broad co-curricular provision and effective boarding support.
- Broad Sixth Form routesA Level plus IB gives internationally minded pupils more route flexibility than A-Level-only schools.
Points to Consider
- The second stage is not genericInterview, group activities and writing should be prepared specifically, not left to personality alone.
- Large boarding environmentThis can be energising for the right child and overwhelming for the wrong one. Fit matters.
Scholarships & Financial Support
| Scholarship Type | Value | Available Places | Selection Method | Stackable? |
|---|---|---|---|---|
| 13+ scholarships | Merit-based; may be supported by bursaries where there is need | Art & Textiles, Drama, Dance, Performing Arts, Design Engineering, Music and Sport in January of Year 8; Academic in April of Year 8. | No | |
| 16+ scholarships | Merit-based; may be supported by bursaries where there is need | Academic by invitation after entrance assessments; Music, Drama, Art & Design and Sport in November of Year 11. | No |
The Preparation Roadmap
Everything here is built around Charterhouse's specific exam format, interview style, and selection criteria. This is not generic 11+ advice. Every recommendation is calibrated to this school.
12-10 weeks before ISEB or digital tests
- Run a baseline in Maths, English, VR and NVR.
- Identify whether weakness is content, timing or adaptive-test behaviour.
- Start one creative-writing task per week immediately.
8-6 weeks before testing
- Move from isolated question types into mixed adaptive-style sets.
- Start interview example bank: subject, book, challenge, house contribution, why Charterhouse.
- Review current-school habits that may affect reference quality.
4-2 weeks before testing
- Run full ISEB or digital-test mocks.
- Practise group and seminar behaviours out loud.
- Review writing for structure, punctuation and prompt fidelity.
Final week
- Do short confidence sets only.
- Rehearse the adaptive-test calm script.
- Avoid new reasoning types and new interview scripts.
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Intelligence Score
Updated May 2026 · 15 sources
Coverage
Measures how much of the admissions picture is directly evidenced rather than inferred from comparable schools or legacy material.
Freshness
This edition was last checked May 2026. Recency scores fall when public evidence ages or current-cycle detail is sparse.
Use it well
Treat lower-scoring areas as prompts to verify with admissions, not as automatic red flags. The score is about evidence quality, not school quality.
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