CAS Letter UK 2026: Full Form, Meaning, Sample & How to Get It

 What is a CAS Letter UK?

CAS (Confirmation of Acceptance for Studies) is an online certificate that contains a unique 14-digit alphanumeric code. It is mandatory to apply for a UK Student Visa.

Key Highlights

• Issued by the university you have been accepted to, following your acceptance of the unconditional offer and making the tuition deposit payment
• It is not a hard-copy document but an online document issued by email, including a number and a statement.
• The CAS is stored in the UKVI database and allows the UK Home Office to view all your personal and course information.
• It contributes 50 points out of 70 required under the Points-Based Student Visa system.
• The same CAS number cannot be used twice.

CAS Letter Vs Offer Letter

These two documents are issued by your university; however, their purposes are entirely different in regards to studying in the UK.

Is a CAS Letter Mandatory for a UK Student Visa?

The UK CAS letter is mandatory and crucial, without which you can’t make an application for a Student Visa of the UK.

This is precisely what it means in terms of your application.

• As part of the UK Student Visa process, there is a mandatory point system that requires applicants to score 70 points. For having a legitimate CAS, issued by a legitimate student sponsor, 50 points are awarded. Another 10 points are awarded if you have met the required financial conditions, and another 10 points for your language skills.
• The CAS letter in UK is only issued by UKVI’s legitimate sponsor universities. The CAS code needs to be entered into your visa application form.
• The CAS number enables UKVI to match your course, cost, and other information.
• The existing students require an updated CAS for advancing to a higher course or for renewing their Student Visa.
• Getting a UK CAS letter does not necessarily assure you that your application will be successful. The decision is made on the basis of an overall assessment by the UKVI caseworker after thoroughly examining all your application documents.

What Information Is Mentioned in a CAS Letter?

A CAS letter UK is much more than a reference number; it is an elaborate document issued by your university on your behalf to UKVI. All information included herein should correspond word-for-word with what you have on your passport and all related documents.

1. Personal Details – Full Name, birth date, nationality, passport number, contact information as shown on your passport.
2. Your Unique CAS Reference Number – A 14-digit alphanumeric code valid for six months and can be used only once for one visa application.
3. Your University’s Information – Your Institution Name, UKVI Sponsor License Number, and all contact details.
4. Course Details — Name of course, level of course (undergraduate, postgraduate, or research), type of course (full-time) and time span from beginning to end.
5. Fees Details — Full fees required for the course, initial deposit for the fees and outstanding balance left for the first year.
6. Educational Requirements for Admission — Official transcripts and scores for English proficiency test (such as IELTS/PTE) verified by the university during the admission process
7. Accommodation Details — Any payments made towards university accommodation, if applicable.
8. Financial Document Review — Confirmation that the university has considered your financial documents during the pre-CAS assessment.

How to Get a CAS Letter for a UK Student Visa

Your CAS letter for UK should be requested following the right procedure since its generation depends on the completion of certain steps in the right sequence.

Step 1 — Receive Your Unconditional Offer

• The process for your CAS will commence only when your offer becomes unconditional. You need to satisfy all academic transcript, grade, language and other additional CAS letter UK requirements.
• After verifying the unconditional offer, you will officially accept the offer through the university portal, thereby gaining entry to the CAS application process.

Step 2 — Pay the Tuition Deposit

• Once you have accepted the offer, you have to make the necessary deposit of the tuition fee so as to confirm your place. Normally, most UK institutions ask for a deposit amount of around £2,000 to £5,000, but it might be as high as £8,000, depending upon the university and course starting in late 2026.
• It should be done without any delay since international transactions take time, which delays the generation of your CAS.

Step 3 — Complete Pre-CAS Checks and Submit Documents

• The universities are under an obligation towards the Home Office to confirm that they are sponsoring a true student.
• This will involve the completion of a form by you for the purposes of verifying your identity, your immigration status, your financial standing, and many others.

Step 4 — Credibility Interview (If Required)

• Pre-CAS interviews are not always needed at all universities, but if you get a request for an interview, then passing it is necessary because you will not get your CAS without it.
• These interviews take place through a video conference call and usually take 20 to 30 minutes, during which questions are asked about your choice and your finances.

Step 5 — CAS Issued

• The CAS letter UK will be issued once the university finishes its process of checking whether your documents and interview meet its requirements. You will receive the CAS by email, where you will see your CAS number as well as the details that were submitted for you to UKVI.
• Check all your details immediately to ensure that your full name, date of birth, passport number, course name, and payment made are correct.

Documents Required to Get a CAS Letter

Your CAS process will not begin until all the required documents are submitted and verified. Here is the list of documents required for CAS letter in UK, and you must prepare in advance for smooth results.

• Valid Passport
• Unconditional Offer Letter
• Tuition Deposit Receipt
• Academic Transcripts
• English Language Certificate
• Financial Evidence
• TB Test Certificate
• ATAS Certificate
• Immigration History

CAS Letter UK — Validity, Processing Time & Next Steps

Once your UK CAS letter application is made, three factors stand out, including the time it will take, its validity period, and what you need to do once it is received. 

CAS Letter Validity UK

A CAS is issued for 6 months from the date of issuance and cannot be used more than once. It cannot be utilised beyond 6 months before the start date of your course. Moreover, in case of expiry, a fresh CAS has to be obtained from your university.

CAS Letter Processing Time UK 2026

After all the necessary documentation is submitted, and if the unconditional offer is issued, then the CAS letter processing time in UK is between 5 business days to 3 to 4 weeks, based on the institution and the period of the year. 

The period between June and August is the peak season, and you must apply early to avoid delays. Moreover, make sure all the required documents are submitted on time without making any typical mistakes.

Next Steps After Receiving Your CAS Letter

Once your CAS letter UK comes in, there are certain procedures that you should go through to ensure that everything is in place. These procedures involve:

• Verification of CAS Information – Confirm your full name, date of birth, passport number, course information, starting and finishing dates of your course, and tuition payments made.
• Get all the required financial statements – Your bank statement for 28 days should be with you and show enough maintenance money, which is £1,334 per month for London and £1,023 per month for outside London.
• Apply for your visa – Online through the website of UKVI using the 14-digit CAS number. It can be done 6 months in advance of your course.
• Pay the Immigration Health Surcharge — You need to pay the healthcare charge for the NHS before making your visa application.
• Schedule your Tuberculosis Test – If you are from one of the countries on the list, which includes India, schedule your test at an authorised clinic in the United Kingdom.
• Secure accommodation and flights — Once you have obtained your visa, ensure that you have booked your accommodation at your university and your travel.

Common Reasons for CAS Letter Delay or Rejection

Getting your CAS application letter deferred or outright denied is common, and generally, you may believe and, more often than not, completely preventable. Below are things to look out for:

• Problem with Bank statements -  The minimum balance during the period of 28 days in total should comply with the required maintenance requirements.
• Incorrect information – You should match your name, date of birth, and passport number in all submitted documents.
• Credibility interview failure — Unclear or memorised answers regarding your course, finances, or future intentions will automatically lead to outright denial.
• Omission of immigration record — Failing to mention a previous visa application that was denied will be considered a violation of compliance.
• Late application submission — The period from June to August experiences much slower processing and making mistakes during this period adds a significant delay to your application.

What Is a Combined CAS Number?

Combined CAS refers to a CAS with only one reference number, linking two related courses at a university on the same application for a student visa.

This is most common when a student is enrolled in an English pre-sessional course followed immediately by a main course. This way, you do not have to apply for two different visas but are able to undertake the two courses using just one visa.

In order to have a CAS Combined issued, the following requirements should be fulfilled:

• The course you plan to study in UK must belong to the same university.
• The time difference between ending the first course and starting the second one shouldn’t exceed a month.
• Academic and language criteria for obtaining the degree in question should be fulfilled or accepted conditionally.
• The university should consider you a legitimate student for both courses.

Final Thoughts

The CAS letter UK is not just paperwork; it is the backbone of your student visa application. Doing it correctly means your path to the UK will be smooth sailing, but do it wrong, and you may find yourself facing unnecessary delays, missing intakes, and visa issues that never had to happen. For those wanting to leave no stone unturned, reach out to our study abroad consultants now. Our counsellors will take you through all stages of the CAS procedure and beyond, ensuring your studies in the UK remain on target.

Frequently Asked Questions:

1. What is a CAS letter for a UK student visa?

A CAS (Confirmation of Acceptance for Studies) is an electronic document issued by a UK university, containing a unique 14-digit code required to apply for a UK Student Visa.

2. How many digits is the CAS number UK?

A UK CAS number is 14 digits long and uses an alphanumeric format. This unique code is generated by your university and linked to your personal and course details in the UKVI system.

3. How long does it take to get a CAS letter in the UK?

UK universities typically issue a CAS letter within 5 to 15 working days after all required documents are submitted and verified. The CAS letter processing time in UK varies by university and intake season.

4. What is the validity of the UK CAS letter?

A UK CAS letter is valid for 6 months from the date of issue. You must submit your Student Visa application within this window, as an expired CAS cannot be used for any visa application.

5. Can I use my CAS if my visa is refused?

 No. A CAS number is single-use only. If your UK Student Visa is refused, your existing CAS becomes invalid, and you must request a fresh CAS from your university before reapplying.

6. Can I get a CAS letter from multiple UK universities?

Yes, you can receive CAS letters from multiple UK universities, but only one CAS can be used for your Student Visa application. All unused CAS numbers must be withdrawn before applying.