Quick Definition
A CAS (Confirmation of Acceptance for Studies) is a unique 14-character reference number issued by a UK UKVI-licensed university. Mandatory for the UK Student visa application, it contains course dates, tuition fees, and the student's qualification details.
CAS Letter — Full Explanation
Issued after an unconditional offer and all entry requirements are met. Used in the online UK Student visa application. Valid 6 months, one-time use. Universities typically issue CAS 3–6 months before course start.
Country Relevance
UK
Helpful Resources
AS
Written & reviewed by
Arjun SinghAcademic Counsellor — Test Prep & Complex Profiles
Frequently Asked Questions
3–6 months before course start, after you have an unconditional offer and met all conditions.
No — the CAS number is mandatory for the UK Student visa application.
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