What Is a CAS? (Not What You Think)
Most Pakistani students hear the phrase "CAS letter" and picture a formal document on university letterhead. The reality is different. A CAS — Confirmation of Acceptance for Studies — is a virtual record stored on a UK Home Office database. Your university assigns you a 14-character alphanumeric reference number (for example, E8Y123456789012) and sends it to you, usually by email. There is no paper certificate to stamp or submit at a visa application centre.
When you complete your online UK Student visa application on the gov.uk portal, you type your CAS number into the application. The Home Office system then pulls all your course and sponsor details directly from the database — there is nothing extra to upload. Your university may also send you a separate "CAS statement," which is a printed summary of those details. It is not required for the visa application, but it is extremely useful for completing the form accurately.
What Information Does Your CAS Contain?
Your CAS statement (the printable summary your university sends alongside the number) will include the following details. Check every single one against your passport before you submit your visa application:
| Field on CAS | What to Check |
|---|---|
| CAS reference number | 14 characters, starts with a letter — copy this exactly into your visa form |
| Your full name | Must match your passport character-for-character (including middle names) |
| Date of birth | Must match passport — a single digit error causes refusal |
| Passport number | Confirm this matches your current, valid passport |
| Course title | Should match what you applied for — watch for shortened titles |
| Course level | E.g., RQF Level 7 (Master's), RQF Level 6 (Bachelor's) |
| Course start and end dates | Drives your visa validity — check against your offer letter |
| Total tuition fee | Used to calculate your maintenance funds requirement |
| Fees paid to date | Reduces the maintenance funds you need to show in bank statements |
| English language assessment | Whether the university has assessed your English (affects SELT requirement) |
| Sponsor licence number | Confirms university is a licensed Student sponsor |
When Does the University Issue Your CAS?
This is the question Pakistani students most frequently ask Applywise — and the answer has a few layers. Universities cannot assign a CAS more than 3 months before your course start date, as per UKVI rules. In practice, most universities issue CAS letters 6–10 weeks before the course begins. But to reach that point, you must first clear several gates:
Your offer must be unconditional — all academic and English language conditions must be met. A conditional offer will not trigger a CAS.
Most UK universities require a deposit of approximately £1,000–£3,000 (roughly PKR 350,000–1,050,000 at 2026 rates) to confirm your place. Until the deposit is paid, the CAS is not issued.
Many UK universities — especially those with large Pakistani student cohorts — conduct a pre-CAS interview before releasing the CAS. This is an admissions credibility check, not a visa interview. See the dedicated section below.
Your university will ask you to fill out a CAS request form confirming your passport details, intended start date, and any fees already paid. Return it promptly — processing typically takes 5–15 working days.
Once issued, the CAS number is valid for 6 months. Your visa application must be submitted within this window.
For a full picture of the UK student visa process after you receive your CAS, see our detailed UK Student Visa from Pakistan guide, which covers financial evidence, the IHS surcharge, biometrics, and processing times.
CAS Validity: The 6-Month Rule
Your CAS is valid for exactly 6 months from the date it is assigned. If you fail to submit your visa application within this window — for example, because of delays in gathering 28 days of bank statements — your CAS expires and you must request a new one from your university. Some universities charge an administrative fee for a re-issue; others do not, but it always costs time.
The Pre-CAS Interview: What Pakistani Students Need to Know
A pre-CAS interview (sometimes called an admissions credibility interview or pre-visa interview) is conducted by the university — not by UKVI — before they agree to issue your CAS. It is increasingly common at UK universities that have experienced high refusal rates or visa compliance issues in their Pakistani student cohort.
The interview is typically 20–40 minutes by video call (Microsoft Teams or Zoom). Interviewers are usually from the international admissions or compliance team. Common questions include:
- Why did you choose this specific university and programme?
- What modules are you most looking forward to and why?
- How does this course connect to your previous degree or work experience?
- What do you plan to do with this qualification in Pakistan after you graduate?
- How are you financing your studies? Who is your sponsor?
- Have you been to the UK before? Do you have family in the UK?
The UKVI Credibility Interview
Separate from the pre-CAS interview, UKVI may call you for a credibility interview after you submit your Student visa application. This is conducted by a UK Home Office officer — either by phone, video call, or in person at a Visa Application Centre — and typically lasts 15–30 minutes. Not all applicants are called; UKVI selects based on a risk assessment that includes country of origin (Pakistani applicants face elevated scrutiny), application consistency, and documentation quality.
In a credibility interview, the officer is testing whether your stated study intentions are genuine. Your answers must be consistent with your CAS, your personal statement, your financial documents, and your visa application form. Typical questions mirror the pre-CAS interview but with additional focus on your ties to Pakistan and your intention to return after your course.
Using Your CAS in the Visa Application
Once you have your CAS number, here is how it feeds into your UK Student visa application:
- Log into the UK Visas and Immigration online application (gov.uk)
- Enter your CAS number when prompted — the system auto-fills your course and sponsor details
- Verify the auto-filled information matches your CAS statement exactly
- Enter tuition fees already paid (reduces the maintenance funds you must demonstrate)
- Complete the financial evidence section: you need 28 consecutive days of bank statements showing you can cover your first year's remaining tuition plus living costs (£1,334 per month for up to 9 months if studying outside London, £1,023 per month in London — approximate 2026 figures, confirm on gov.uk)
- Pay the application fee (approximately £490 for entry clearance in 2026) and the Immigration Health Surcharge (approximately £776 per year)
Your CAS also determines whether your university will assess your English language proficiency on the CAS itself. If your university holds Highly Trusted Sponsor (HTS) status and assesses English on your CAS, you may not need a separate SELT (Secure English Language Test) such as IELTS UKVI — standard IELTS Academic may satisfy both your admission and visa requirements. Always confirm this with your university before booking your English test. For full IELTS requirements for UK universities, see our UK study guide.
Common CAS Problems and How to Fix Them
| Problem | Cause | Fix |
|---|---|---|
| CAS has wrong name spelling | Typo by university admissions staff | Email international admissions immediately with passport scan — they can update the CAS within 2–5 working days |
| CAS not issued despite deposit paid | Missing CAS request form, or pre-CAS interview not yet completed | Chase your admissions officer with a timeline — universities are obliged to issue the CAS within a reasonable period once all conditions are met |
| CAS expired before visa was submitted | Delays in financial document preparation | Request a new CAS from your university — gather all financial documents before making the request to avoid a second expiry |
| CAS shows wrong tuition fee | Fee increase not updated, or deposit not recorded | Get a corrected CAS — submitting with the wrong fee figure will affect your maintenance funds calculation |
| University withdrew the CAS offer | Failed pre-CAS interview or visa compliance issue | Contact Applywise — we can help you approach an alternative university or appeal the decision where possible |
2025–2026 Context: What Has Changed
The CAS process itself has not changed structurally in 2026, but the surrounding visa environment has tightened significantly for Pakistani applicants. UKVI refusal rates from Pakistan have remained elevated. Key 2025–2026 developments affecting CAS and the student visa:
- Stricter financial evidence scrutiny: UKVI caseworkers are examining bank statements more carefully for "sudden deposits" that inflate balances artificially. Funds must have been held for a full 28 days and must reflect a credible financial profile.
- More pre-CAS interviews: UK universities operating under UKVI compliance pressure are conducting pre-CAS interviews at higher rates than in 2023–2024, particularly for postgraduate programmes at newer or smaller universities.
- Graduate Route preserved (2026): Following debates in 2024, the Graduate Route (formerly Post-Study Work visa) remains available for 2026 graduates — 2 years for Bachelor's and Master's, 3 years for PhD. Your CAS-linked university must be an HTS-status sponsor for you to be eligible.
- IHS surcharge increase: The Immigration Health Surcharge rose to approximately £776 per year in 2024 and has not been reduced. This is a significant upfront cost for multi-year programmes.
Applywise has placed over 1,000 students in UK universities and secured more than $3 million in scholarships. As an ICEF member and British Council IELTS partner, we know exactly which universities are currently conducting pre-CAS interviews, which institutions issue CAS quickly, and how to prepare your application to minimise credibility concerns.
Confused about your CAS or stuck waiting for it? Applywise guides Pakistani students through every stage — from securing an unconditional offer to passing the pre-CAS interview, gathering financial documents, and submitting a clean visa application. Book a free 30-minute consultation with our UK team.
Frequently Asked Questions
What is a CAS letter for the UK student visa?
A CAS (Confirmation of Acceptance for Studies) is not a physical letter — it is a unique 14-character alphanumeric reference number assigned to you by your UK university. It is stored on a Home Office database and confirms your place on a course. You enter the CAS number in your online Student visa application; the system automatically fetches your course and sponsor details. Your university may also send you a "CAS statement," a printable summary for your reference.
When does the university issue the CAS?
Universities issue the CAS after you have an unconditional offer, have paid your tuition deposit (typically £1,000–£3,000), met all conditions, and — where required — passed the pre-CAS interview. UKVI rules prohibit universities from assigning a CAS more than 3 months before your course start date. In practice, most students receive their CAS 6–10 weeks before term begins.
How long is a CAS valid?
A CAS is valid for 6 months from the date it is assigned to you. You must submit your Student visa application within this 6-month window. If your CAS expires before you apply, you must request a new one from your university — which may involve a processing delay and sometimes an administrative fee.
What is a pre-CAS interview and do Pakistani students have to do one?
A pre-CAS interview is an admissions credibility check conducted by the university — not by UKVI — before they issue your CAS. It is increasingly common at UK universities with large Pakistani student intakes. Interviewers ask about your chosen course, your study plans, career goals, and financial situation. Failing this interview means no CAS, so thorough preparation is essential.
What should I check on my CAS before submitting the visa application?
Check every detail on your CAS statement against your passport: full name, date of birth, passport number, course title, course start and end dates, total tuition fee, fees paid to date, and the English language assessment recorded. Any discrepancy — even a misspelling — can cause a visa refusal. Contact your university's international admissions office immediately to issue a corrected CAS before you apply.
