UK Student Visa for International High School Students: Step-by-Step Guide

Last Updated: April 2026

The UK Student visa (formerly Tier 4) is the immigration permission that allows international students ages 14-18 to study at an accredited UK high school for longer than six months. According to UK Visas and Immigration (2025), students under 16 must apply via the Child Student visa route, while students aged 16 or 17 at licensed independent boarding schools apply via the Student visa route - both routes replaced the old Tier 4 framework in October 2020. The visa cannot be applied for until the school issues a Confirmation of Acceptance for Studies (CAS), which means the school admission process must begin well before any visa paperwork.

Amerigo Education partners with 40 Niche A+/A rated schools across the US, Canada, and the UK, supporting 3,500+ students from 55+ countries. The Class of 2025 achieved 97% admission to Top 100 US universities. Amerigo's UK partner, Brentwood School in Essex, operates through Brentwood's established boarding program with US university counseling support from Amerigo, giving international students a UK high school experience alongside structured preparation for US university applications.

This guide covers how the UK Student visa process works for international high school students ages 14-18 - from identifying the correct visa category, to the full document checklist, financial requirements, and processing timeline - with guidance on how the process applies to students enrolling at Brentwood through Amerigo.

Key Takeaways

• Two Visa Routes: Students under 16 need the Child Student visa; students aged 16-17 at licensed independent boarding schools apply for the Student visa - age at the application date (not enrollment date) determines the route.
• CAS Is Step One: No visa application can proceed without a CAS reference number issued by the school after the student accepts their offer - this drives the entire timeline.
• Financial Evidence Required: Applicants must show sufficient funds to cover tuition (as declared in the CAS) plus the Home Office living cost allowance, evidenced in bank statements dated within 31 days of application.
• Processing Time: Standard UK visa processing takes up to three weeks from the biometric appointment; families targeting September entry should submit by early July.
• Amerigo Does Not Provide Visa Services: All visa decisions rest with UK Visas and Immigration - families should work directly with Brentwood School and their own immigration adviser for UK visa preparation.

The sections below break down each stage of the UK Student visa process, beginning with how to identify the correct visa route and ending with the timeline for a September school start.

What Is the UK Student Visa for High Schoolers?

The UK Student visa and Child Student visa are the two immigration routes available to international students under 18 who want to study at a UK school for more than six months. According to IIE Open Doors (2024), the UK ranks among the top five global destinations for internationally mobile students across all education levels, with demand for Student visa places at independent schools remaining consistently high. Both routes replaced the old Tier 4 system in October 2020, but the distinction between them matters: age at the time of application - not at the time of enrollment - determines which route applies.

Students under 16 at the time of application must use the Child Student route, which requires additional documentation: a parental consent letter from both parents and confirmation of care arrangements in the UK. Students aged 16 or 17 may use the Student visa route, but only when applying to a licensed independent boarding school - day school applications at this age do not qualify. Families considering Amerigo's partner school network should confirm the correct visa category early in the enrollment inquiry stage.

What Documents Are Required for a UK Student Visa?

The document checklist for a UK Student or Child Student visa is largely consistent across applicants, with additional items required for under-16 applications. All documents must be original unless the guidance specifies otherwise; photocopies are not accepted at the biometric appointment.

Core document checklist for UK high school visa applicants:

1. Valid Passport: Must cover the full visa period with at least one blank page. The passport used when the school issued the CAS must be the one submitted.
2. CAS Reference Number: Issued by the school after offer acceptance. Contains course dates, tuition amount, and the school's sponsor licence number.
3. Financial Evidence: Bank statements (student or parent/sponsor) dated within 31 days of application, showing tuition funds plus the Home Office living cost allowance held for at least 28 consecutive days.
4. Parental Consent Letter: Signed by both parents (or sole legal guardian) for all under-18 applicants, confirming consent to travel and the student's care arrangement in the UK.
5. Care Arrangement Confirmation (under 16): A letter from the boarding school confirming the student's residential place - required for Child Student visa applications.
6. Immigration Health Surcharge (IHS) Receipt: Confirmation of payment through the online visa application portal, completed before the biometric appointment.

Students from countries on the Home Office tuberculosis (TB) screening list must also provide a TB test certificate from an approved clinic - the country list is published on gov.uk. Families should begin compiling all documents as soon as the CAS is received, at least eight weeks before the intended travel date.

What Are the Financial Requirements for a UK Visa?

Financial evidence is one of the most scrutinized components of a UK Student visa application. According to OECD (2024), the UK ranks among the top three global destinations for international students across all education levels, which keeps demand for UK student visas high and financial documentation requirements strict. The Home Office requires proof that the parent or sponsor holds sufficient funds to cover both course tuition and a living cost allowance for the first academic year. Tuition is declared in the CAS - the financial evidence must cover that amount plus the applicable living cost threshold.

For 2025-2026, the living cost requirement for schools outside London is £1,023 per month for up to nine months (£9,207 total). Schools in the London area require a higher threshold of £1,334 per month. These figures are updated annually - families should verify current thresholds on gov.uk before submitting.

The funds must appear in bank statements dated within 31 days of application, with the balance held continuously for at least 28 days before the statement date. Funds in a parent's account are acceptable when the parent is identified as the visa sponsor.

How Long Does the UK Visa Process Take?

Standard processing time for a UK Student visa is up to three weeks (15 working days) from the date of the biometric enrollment appointment. Priority and Super Priority services are available in some countries for an additional fee, reducing processing time to five working days or next-day processing respectively. Availability of these services varies by country - families should check their nearest UK Visa Application Centre (VAC) before deciding on a submission strategy.

For families targeting September school entry, the recommended submission timeline is:

1. January-March: Submit school application; accept offer; school begins CAS preparation.
2. March-April: School issues CAS; student and family review CAS details for accuracy.
3. April-May: Complete online visa application, pay IHS, and book biometric appointment.
4. May-June: Attend biometric appointment and submit supporting documents with passport.
5. June-July: Receive visa decision; retain travel vignette and BRP collection instructions.
6. August-September: Travel to the UK; collect Biometric Residence Permit (BRP) from the designated Post Office within 10 days of arrival, then begin school enrollment.

The BRP is not mailed to the student's home country - it is collected in the UK at a designated Post Office specified in the visa approval letter. Students must collect it before the stated deadline.

How Does Brentwood School Fit the UK Visa Process?

Brentwood School Essex is Amerigo's UK partner school, operating through Brentwood's established boarding program. For international students, the UK Student visa process at Brentwood follows the same steps as at any UK independent boarding school: Brentwood holds the required Home Office sponsor licence and issues the CAS directly to each enrolled student after the admission process is complete.

Amerigo's role at Brentwood is distinct from its role at US Signature Schools: Amerigo does not operate an on-campus international department at Brentwood, and Life360 or Reach monitoring is not part of the Brentwood program. Amerigo home-country staff support families in their native language, and Amerigo home-country staff support families in their native language through WeChat and other platforms. Brentwood has its own university counseling team that supports students through the university application process. Families who want to compare school options before enrolling can find a school across Amerigo's network, or contact us directly for guidance on which aspects of enrollment and visa preparation are managed by Brentwood versus UK Visas and Immigration (UKVI). Amerigo does not provide visa application services - families should work directly with Brentwood and consult an immigration adviser for UK-specific visa preparation. 

Frequently Asked Questions

What is the UK Student visa for high school students?

The UK Student visa (formerly Tier 4 General) allows international students aged 16-17 to study at a licensed independent boarding school in the UK for more than six months. Students under 16 must apply for the Child Student visa instead. Both routes require a Confirmation of Acceptance for Studies (CAS) issued by the school after the student accepts their offer. The old Tier 4 system was replaced by the current Student and Child Student visa framework in October 2020.

What is the difference between the Child Student and Student visa?

The Child Student visa is for students under 16 at visa application; the Student visa (for 16-17 year olds) applies only to students at licensed independent boarding schools. The Child Student visa requires additional documentation: a parental consent letter from both parents and confirmation of boarding arrangements. Both routes require the same financial evidence and CAS reference number. Age at the application date determines the route.

What is a CAS and why is it required?

A CAS (Confirmation of Acceptance for Studies) is a unique reference number issued by the school after the student accepts their offer. It contains the course start and end dates, tuition amount, the school's Home Office sponsor licence number, and the student's personal details. The CAS is mandatory - no UK Student visa application can proceed without it. The school generates the CAS through the Home Office Sponsor Management System and provides it directly to the student.

How much money must a student show for a UK Student visa?

For 2025-2026, students at schools outside London must show tuition (as declared in the CAS) plus £9,207 in living costs (£1,023 per month for nine months). London schools require £1,334 per month. Evidence must appear in bank statements dated within 31 days of application, with funds held at least 28 consecutive days before the statement date. Verify current thresholds on gov.uk before submitting.

How long does the UK Student visa take to process?

Standard processing takes up to three weeks (15 working days) from the biometric appointment date. Priority services (five working days) and Super Priority (next working day) are available in some countries for additional fees. Families targeting September school entry should aim to submit their application by early July. Applications submitted during the June-August peak period may face extended processing times, so earlier submission is strongly recommended once all documents are ready.

What is the Immigration Health Surcharge and is it mandatory?

The Immigration Health Surcharge (IHS) is a fee paid as part of the online visa application that grants access to NHS (National Health Service) healthcare throughout the visa period. Payment is mandatory for all UK Student and Child Student visa applicants - the visa application cannot be completed without the IHS payment receipt. The current rate is listed on gov.uk and updated periodically by the Home Office.

Does Amerigo provide UK visa application support?

No. Amerigo Education does not provide visa application services. Brentwood School manages the CAS issuance and guides families through standard documentation requirements as part of the enrollment process. All visa decisions are made exclusively by UK Visas and Immigration - no school or program can guarantee a visa outcome. All visa decisions are made exclusively by UK Visas and Immigration - no school or program can guarantee a visa outcome.

What should students do first: apply for school or apply for a visa?

Always complete the school application first. The visa application cannot begin without a CAS, which the school issues only after the student accepts their offer. Starting with the visa before having a school offer is not possible - there is no CAS reference number to include. For September entry, families should target school application submission by January or February to allow time for both admission and visa preparation.

Conclusion

The UK Student visa process for international students ages 14-18 is sequential: school admission first, then CAS, then visa application with full financial and documentary evidence. Students under 16 use the Child Student route; students aged 16-17 at independent boarding schools use the Student visa route. Starting the school application six to eight months before the intended enrollment date provides the lead time needed to work through each stage without delays.

Ready to Explore the UK Pathway Through Brentwood?

Amerigo Education supports international students through Brentwood School in Essex - an established UK independent boarding school with US university counseling from Amerigo. To learn more about the program and the admission process, contact us to speak with an admissions representative, or apply now to begin. Optional visa application support is available through ZF Visa, a third-party partner.

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About the Author

This guide was written by the Amerigo Education content team, drawing on program data from staff operating the on-campus international department at 40 Niche A+/A rated US, Canadian, and UK partner schools. Learn more about Amerigo Education.

Disclaimer: This article provides general information for educational purposes only. Families should conduct independent research, request current program data from providers, and consult with program representatives regarding specific circumstances. Contact us with questions.