CAT4 Test Preparation for UK Schools [2026]
The CAT4 (Cognitive Abilities Test) is one of the most widely used assessments in the UK education system. From grammar schools to independent schools, the CAT4 plays a crucial role in admissions, streaming, and identifying gifted students.
This guide covers which UK schools use the CAT4, the scores they typically expect, and how to prepare your child for the best possible result.
Which UK Schools Use the CAT4?
The CAT4 is used across all sectors of UK education:
- Grammar schools: Many grammar schools use the CAT4 alongside or instead of the 11+ exam. It helps identify students with strong cognitive potential regardless of their primary school's curriculum.
- Independent schools: Leading independent schools use the CAT4 as part of their entrance process. Schools like Eton, Harrow, Winchester, and many others require CAT4 scores.
- State secondary schools: Many state secondaries administer the CAT4 in Year 7 for streaming and setting purposes, even if they don't use it for admissions.
- Academies and free schools: Academy trusts increasingly use the CAT4 to benchmark student ability and inform teaching strategies.
Score Requirements by School Type
CAT4 scores are reported as SAS (Standard Age Scores) and Stanine values. See our full scores guide for a detailed explanation of how scoring works.
| School Type | Typical SAS Required | Typical Stanine |
|---|---|---|
| Grammar School | 112+ | 7+ |
| Top Independent School | 120+ | 8–9 |
| Independent School | 105+ | 6+ |
| State School (top set) | 100+ | 5+ |
UK CAT4 Testing Timeline
The typical timeline for CAT4 testing in the UK:
- Year 4–5 (age 8–10): Some prep schools begin CAT4 testing. This is when early preparation can have the biggest impact.
- Year 5 (age 9–10): Many independent schools require CAT4 scores as part of 11+ registration. Level C is typically used.
- Year 6 (age 10–11): Peak testing period. Grammar schools and state secondaries administer the CAT4. Level D is most common.
- Year 7 (age 11–12): State schools administer CAT4 for internal streaming and setting. Results inform teaching groups for Years 7–9.
Which CAT4 Level for UK Schools?
The most commonly tested levels for UK school entry:
- Level C: Ages 9–11 (Year 6). Used for 11+ entry at grammar and independent schools.
- Level D: Ages 10–12 (Year 7). The most commonly administered level in UK secondary schools.
- Level E: Ages 11–13 (Year 8–9). Used for 13+ entry at senior schools.
- Level F: Ages 13–17 (Year 9–12). Used for sixth form entry and senior school admissions.
How to Prepare for the CAT4 in the UK
MindScout provides everything UK families need for CAT4 preparation:
- Free diagnostic test: Start with a full practice test to identify your child's strengths and weaknesses across all four batteries.
- AI Tutor Atlas: Atlas explains every question in child-friendly language, teaching strategies rather than just giving answers.
- Progress reports: Track stanine predictions and improvement trends in the parent dashboard.
- Timed practice: Build familiarity with time pressure through realistic timed practice sessions.
Ready to start? Take a free CAT4 practice test and see where your child stands today.
FAQs: CAT4 in the UK
Do all UK schools use the CAT4?
Not all schools use the CAT4, but it is one of the most widely administered cognitive assessments in the UK. Grammar schools, independent schools, and many state secondaries use it for admissions or streaming.
Is the CAT4 the same as the 11+?
No. The CAT4 tests cognitive abilities (how your child thinks), while the 11+ typically tests academic achievement in English and Maths. Some grammar schools use the CAT4 alongside the 11+, while others use only one.
When should my child start preparing?
Ideally 4–8 weeks before the test. Start with a diagnostic test to identify weak areas, then focus practice on those batteries. Regular short sessions (15–20 minutes daily) are more effective than cramming.
How long does CAT4 preparation take?
Most children see meaningful improvement with 4 weeks of focused practice (15–20 minutes per day). The key is consistency and targeting weak areas rather than total hours spent.