Understanding the CAS Letter and UK Student Visa Process
By Muntasir • Published Feb 15, 2026 • Updated May 28, 2026 • Guides
UK student visa applications require a unique 14-digit Confirmation of Acceptance for Studies (CAS) reference from a licensed sponsor. To qualify, you must show living funds of £1,529 monthly for London or £1,171 elsewhere, held in your bank account for 28 consecutive days. Processing takes three weeks for the standard route or five days via the priority service.
Choosing to pursue higher education in the United Kingdom requires thorough preparation and accurate financial planning. Our Ultimate Guide to Studying in the UK 2026 covers universities, costs, and scholarships in full. Your academic journey depends on securing admission to a licensed institution and satisfying modern immigration requirements. This comprehensive guide outlines the essential steps, costs, and visa regulations.
What is a UK CAS Letter?
The Confirmation of Acceptance for Studies (CAS) is an electronic document issued by your licensed university sponsor. You need this unique 14-character reference number to initiate your visa application. It contains your personal details, course information, tuition fees, and any paid deposits.
| CAS Attribute | Detail and Requirement | Official Rule |
|---|---|---|
| Format | 14-character alphanumeric reference number | Issued electronically via the Home Office Sponsor Management System |
| Validity | 6 months from the date of issue | You must submit your visa application within this period |
| Earliest Application | 6 months before your course start date | Applies to applications submitted from outside the United Kingdom |
| Deposit Requirement | Often requires a partial tuition fee payment | Your university updates the CAS to reflect your paid amount |
Step-by-Step UK Student Visa Application Process
Securing your visa requires following a structured chronological pathway. You begin the process online after receiving your official CAS number. Completing each stage accurately avoids delays in receiving your final decision.
- Receive your CAS: Accept an unconditional offer from a licensed UK university and pay your required tuition deposit.
- Compile financial evidence: Secure the required living funds and remaining tuition fees in an approved bank account for 28 consecutive days.
- Submit the online application: Complete the official form on the GOV.UK visa portal .
- Pay the required fees: Submit your visa application fee and the mandatory Immigration Health Surcharge online.
- Book a biometrics appointment: Attend an interview at a local visa application center to register your fingerprints and digital photograph.
- Verify identity online: Use the official "UK Immigration: ID Check" app if your nationality qualifies for digital verification.
Financial Proof and Maintenance Fund Requirements
Immigration authorities require proof of sufficient financial resources to sustain yourself during your studies. You must demonstrate funds covering your remaining first-year tuition fees and monthly living expenses. Holding these funds in an incorrect account type leads to immediate application refusal.
| Location of University | Required Monthly Living Funds | Maximum Period for Living Funds | Total Living Cost Requirement |
|---|---|---|---|
| Inside London | £1,529 per month | 9 months | £13,761 |
| Outside London | £1,171 per month | 9 months | £10,539 |
The Home Office enforces strict criteria for financial documentation. Your bank statement must display the full required sum held for 28 consecutive days. The date of your bank statement must reside within 31 days of your online visa application date.
- Acceptable Evidence: Personal bank statements, building society passbooks, official government sponsorships, or educational loans from approved financial institutions.
- Unacceptable Evidence: Credit card limits, stock portfolios, property valuations, cryptocurrency accounts, or bank statements from non-approved international banks.
Step-by-Step Required Document Checklist
Submitting a complete set of supporting files minimizes processing delays. You must ensure all foreign-language documents carry a certified English translation.
- Valid Passport: Your travel document must contain at least one blank page for your visa vignette.
- CAS Letter: The official reference document issued by your university sponsor.
- Financial Evidence: Bank statements proving you hold the required funds.
- English Language Certificate: Approved test scores from providers like IELTS Academic or PTE Academic .
- Tuberculosis (TB) Test Certificate: Required if you reside in a listed nation for more than six months.
- Academic Qualifications: Transcripts and graduation certificates listed on your CAS document.
Processing Times, Fees, and Service Pathways
The time required to receive your visa decision varies based on your chosen processing route. Optional expedited services incur additional charges.
| Processing Service | Decision Timeline | Additional Cost (Outside UK) | Total Processing Charge | Official Source Link |
|---|---|---|---|---|
| Standard Route | 3 weeks (15 working days) | £0 | £558 | GOV.UK Student Visa Fees |
| Priority Service | 5 working days | £500 | £1,058 | GOV.UK Priority Visas |
| Super Priority | 24 hours (1 working day) | £1,000 | £1,558 | GOV.UK Priority Visas |
All international students must pay the mandatory Immigration Health Surcharge during the online application. This payment grants you access to the National Health Service (NHS) during your stay. The student rate stands at £776 per year of study.
Common Visa Refusal Reasons and Success Strategies
Failing to meet specific requirements results in immediate application refusal. Understanding these common errors helps you prepare a successful application.
- Insufficient Funds: The balance in your bank account fell below the required threshold for even a single day during the 28-day period. Maintain a buffer amount above the minimum requirement to prevent currency fluctuations from reducing your balance.
- Incorrect Document Date: The bank statement carries a date older than 31 days at the time of visa submission. Obtain your final statement on the day of your online application submission.
- Unapproved Financial Institution: The bank holding your funds does not meet Home Office verification standards. Verify your chosen financial institution resides on the approved list before depositing your funds.
- Incomplete Academic Records: Submitting documents different from those listed on your CAS. Double-check your CAS reference list and upload identical academic files.
Recent UK Policy Shifts and Real-World Updates
The Home Office implemented several regulatory updates to manage international student numbers. Adapting to these rules prevents application errors.
- Dependent Visa Restrictions: Home Secretary James Cleverly announced restrictions on family members in 2023. Effective January 1, 2024, international students on taught postgraduate courses no longer hold eligibility to bring dependents to the United Kingdom.
- Maintenance Fund Adjustments: The Home Office increased the monthly living cost requirement on November 11, 2025. Students must now show £1,529 monthly for London courses and £1,171 monthly for courses outside London.
- Transition to eVisas: The UK government replaced physical Biometric Residence Permits (BRP) with digital eVisas on December 31, 2024. International students now verify their immigration status online through the official View and Prove service.