Do I need UK ATAS clearance for my STEM degree

What is ATAS

The Academic Technology Approval Scheme is a mandatory UK security clearance system for international postgraduate students and researchers in specific STEM fields. It exists because these subject areas could relate to weapons of mass destruction (WMD) or advanced conventional military technology (ACMT) development.

The FCDO (Foreign, Commonwealth and Development Office) assesses whether your proposed research or study poses a national security risk. It's not a visa assessment. ATAS clearance is separate from and required before your visa application.

Who Needs ATAS Clearance

You need ATAS clearance if all three conditions apply:

• You're pursuing a postgraduate degree (taught master's or PhD)
• Your subject falls within the designated STEM areas
• You're a national of a non-exempt country

The scheme applies to subjects identified by their CAH3 code (Common Aggregate Hierarchy code). Your university will confirm in your offer letter whether your course requires ATAS .

Common STEM subjects requiring ATAS include physics, chemistry, engineering, mathematics, computer science, biotechnology, and related research areas. Your offer letter will state your CAH3 code explicitly.

Who Doesn't Need It

Citizens of these countries do not need ATAS, even in sensitive STEM fields:

• Australia
• Austria
• Belgium
• Bulgaria
• Canada
• Croatia
• Cyprus
• Czech Republic
• Denmark
• Estonia
• Finland
• France
• Germany
• Greece
• Hungary
• Iceland
• Ireland
• Italy
• Japan
• Latvia
• Liechtenstein
• Lithuania
• Luxembourg
• Malta
• Netherlands
• New Zealand
• Norway
• Poland
• Portugal
• Romania
• Singapore
• Slovakia
• Slovenia
• South Korea
• Spain
• Sweden
• Switzerland
• United States

All EU and EEA countries are exempt. If you hold a dual nationality and one passport is from an exempt country, you may qualify for exemption if you use that passport for your visa application.

Students with Indefinite Leave to Remain or settled status under the EU Settlement Scheme do not need ATAS .

Processing Times and Fees

Cost: ATAS applications are completely free. The FCDO charges nothing for assessment or certificate issuance .

Standard processing:

• At least 20 working days (4 weeks) from application date
• Some applications take 30+ working days depending on complexity
• No expedited or fast-track option exists

Peak season delays: Processing times extend during April-September when application volumes are highest . Planning your application for these months requires applying much earlier.

Appeal timeline: If your application is refused and you appeal, the FCDO aims to provide an appeal decision within 15 working days .

Do not contact the FCDO: Universities and students should not contact the ATAS team within 6 weeks of submitting an application . Applications are processed in order of receipt.

Steps to Apply for ATAS

You can apply before your offer becomes unconditional and before receiving your CAS number. Apply as soon as you have your offer letter .

1. Verify you need ATAS - Check your offer letter for the ATAS statement and CAH3 code
2. Gather institution information - Your university provides an ATAS statement with your course details and CAH3 code; copy this text exactly into your application
3. Prepare personal information - Have your full name, date of birth, passport details (the one you'll use for visa), and current address ready
4. List employment history - Document all jobs you've held with dates
5. Identify referees - Get contact details for two people who have known you for at least 3 years (see Referees section below)
6. Create an FCDO account - Use a non-Gmail email address (see Email Provider Warning below)
7. Complete the online form - Visit the official ATAS portal and submit your application
8. Wait for decision - The FCDO will send your certificate via email once approved

Do not paraphrase or edit the course description provided by your university. Copy it exactly as written.

Required Documents and Information

Have these ready before starting your application:

• Passport details (the passport you'll use for your UK visa)
• Offer letter from your university
• ATAS statement and CAH3 code from your offer letter
• Full employment history with dates and employer names
• Education history including degrees and institutions
• Contact information for two referees
• Personal statement explaining your study or research goals
• Financial sponsorship information (if applicable)

Referees Requirements

You must provide details of two referees who have known you for a minimum of 3 years .

Referee eligibility:

• At least one referee must be from the academic sector (a professor, supervisor, or academic institution)
• Family members cannot be referees
• Referees should ideally be from your home country, but this is not required
• If you've studied at degree level, at least one should be from the university where you studied
• If you're starting a master's from undergraduate study, you may use a high school teacher as one referee

Provide their full names, email addresses, and phone numbers.

Certificate Validity

ATAS certificates are valid for six months from the date of issue for visa application purposes . Once you submit your ATAS certificate with your visa application, it covers your entire course even after the 6-month validity expires.

You cannot enroll on your course until you hold a valid ATAS certificate . Universities are prohibited by immigration law from registering international students without proof of ATAS clearance.

ATAS and Your CAS Number

You must obtain ATAS clearance before your university issues your Confirmation of Acceptance for Studies (CAS) . This means:

• Apply for ATAS immediately after receiving your offer
• Your university will not issue a CAS until you provide evidence of ATAS approval
• You cannot proceed with your student visa application without a CAS
• Plan for a 4-month timeline from ATAS application to visa submission

Aim to apply for your ATAS certificate at least 4 months before you intend to apply for your student visa . For an October course start, apply by 15 May at the latest.

Email Provider Warning

The FCDO is currently experiencing technical issues when issuing ATAS certificates to Gmail email addresses . Even if your application is approved, you may not receive your certificate email.

Do not use Gmail for your ATAS application. Use alternative email providers such as Outlook, Yahoo, or your institutional email address instead.

If you've already applied with Gmail and your application has been approved, check your ATAS application portal to confirm the decision, then contact your university's admissions team to request a copy of your approved certificate .

What Happens If Your Application Is Refused

The FCDO will not explain the reasons for refusing your ATAS application because the assessment involves national security considerations .

You receive a refusal letter via email with no explanation. Your university cannot advise you on strengthening your application because the reasons remain confidential.

90-Day Reapplication Rule

Since February 2024, if your ATAS application is refused, you cannot reapply for the same course at the same institution for 90 days . The 90-day clock starts from the date of your refusal letter.

You may apply for a different course at a different institution within the 90-day period. After 90 days, you may reapply for the same course.

Appeal Process

You can appeal a refusal by emailing [email protected] within one calendar month of receiving the refusal .

In your appeal email, submit:

• Supporting letters from your university or supervisor
• Documentation or clarification for anything you omitted from your original application
• Any additional information you believe is relevant

The FCDO will provide an appeal decision within 15 working days .

Appeals success rates are low because the FCDO will not disclose what triggered the initial refusal. Your supervisor may write a letter addressing potential security concerns related to your research, but without knowing the reason for refusal, it is difficult to address the FCDO's concerns directly.

Common Application Mistakes

Based on FCDO guidance , applications are delayed or rejected most often for these reasons:

• Research statement does not fully describe your research topic and methods (for PhD applicants)
• Referee contact information is incomplete or incorrect
• Employment or education history has gaps or missing dates
• Missing information about financial sponsorship
• Using Gmail as your email address
• Submitting duplicate applications
• Paraphrasing your course description instead of copying the exact ATAS statement from your offer letter

Ensure every field in the application is completed accurately and thoroughly.

Real-World Timeline Example

A 2024 student at Imperial College London had their ATAS application refused in June . They submitted an appeal and reapplied for their course at a different institution to keep their September start date on track, since the 90-day rule prevented reapplication to the same institution.

The student contacted [email protected] to understand the appeal process and consulted their supervisor for advice on strengthening the next application, though the FCDO provided no explanation of the initial refusal.

This demonstrates the real impact of timing: applying late leaves no buffer if you receive a refusal. Starting your ATAS application 4+ months before your intended visa application date provides time to handle unexpected delays or appeals. Related: UK ATAS vetting and Canadian security regulations.

Key Contacts

• ATAS Application Portal: Official FCDO portal (link provided by your university)
• ATAS Enquiries: [email protected]
• Your University: Your admissions or international student office

Do not contact the ATAS team within 6 weeks of submitting your application unless you receive a request for additional information.

Sources

• Academic Technology Approval Scheme (ATAS) - GOV.UK
• Guidance on how to apply for an ATAS certificate - GOV.UK
• How to apply for an Academic Technology Approval Scheme (ATAS) certificate - University of Edinburgh
• ATAS: Frequently asked questions - University of Sheffield
• ATAS Certificate: Advice for Visa Applicants in 2026 - DavidsonMorris
• Academic Technology Approval Scheme (ATAS) - University of Nottingham
• Applying for an Academic Technology Approval Scheme certificate - University of Sussex