- Apply from
- Up to 6 months before course start (outside UK)
- Typical decision
- A few weeks after biometrics (varies by country)
- Prerequisite
- CAS issued + 28-day financial evidence held
- Required steps
- Online form, fee + IHS, biometrics, document upload
- Confirm
- Country-specific processing times on GOV.UK
Key takeaways
- You can usually apply up to six months before your course start date from outside the UK.
- Apply as soon as you have your CAS and your 28-day financial evidence is ready.
- Core documents: CAS reference, passport, financial evidence, English proof, and (where required) TB test and ATAS.
- Biometrics enrolment is a required step — the decision clock effectively runs from there.
- A late application is the single most avoidable risk to your start date — build the timeline backwards from day one.
The timeline, working backwards from your start date
Start roughly 6–9 months out: accept your offer, meet every condition (transcripts, English test) so your university can issue your CAS, and identify the funds you will use. About 3–6 months out: your CAS is issued, and you begin holding your financial evidence for the continuous 28-day period. Once your CAS is issued and your 28 days are complete, apply online — from outside the UK you can usually apply up to six months before your course start date. Pay the visa fee and the immigration health surcharge, then book and attend your biometrics appointment at a visa application centre. After biometrics, most decisions arrive within a few weeks, though this varies by country and season; priority services may be available in some locations for an extra fee.
The full document checklist
Have these ready before you start the online form: your CAS reference number (from your university); a current passport (or travel document); financial evidence meeting the 28-day rule (or a financial-sponsor letter); proof of your English-language ability where required (an approved SELT, or your sponsor's confirmation for degree-level study); a tuberculosis (TB) test certificate if you are resident in a listed country; an ATAS certificate if your course and nationality require one (certain sensitive science and technology subjects); and, if you are under 18 or relying on parental funds, parental consent and proof of relationship. Documents must be consistent with each other — a mismatch between your passport, offer and CAS is a common, avoidable refusal cause.
Where timelines go wrong — and how to protect your start date
The two recurring failures are applying late (leaving no buffer if documents are queried) and a CAS that arrives slower than expected. Protect yourself by meeting your offer conditions fast, asking your university for its typical CAS issuance timeline the moment you accept, and starting your 28-day financial hold early so the money is 'seasoned' and ready. If a decision is running close to your start date, tell your university immediately — deferral or late-arrival options sometimes exist. Study UK Now builds your country-specific timeline, chases your CAS, and checks every document before submission so a date never slips.
How Study UK Now helps with this
Get expert, end-to-end help — from university matching to your visa.
Frequently asked questions
When should I apply for my UK Student visa?
Apply as soon as you have your CAS and your financial evidence has met the 28-day rule. From outside the UK you can usually apply up to six months before your course start date — and applying early is the most reliable way to protect that date. Always check current country-specific processing times on GOV.UK.
What documents do I need for a UK Student visa?
Core documents are your CAS reference number, a current passport, financial evidence meeting the 28-day rule (or a financial-sponsor letter), proof of English ability where required, a TB test certificate if you are resident in a listed country, and an ATAS certificate for certain courses. If you are under 18 or using parental funds, you also need parental consent and proof of relationship. Confirm your exact list on GOV.UK.
How early can I apply for a UK Student visa from outside the UK?
From outside the UK you can usually apply up to six months before your course start date, once you have your CAS. You cannot apply before that window opens, so plan your CAS and 28-day financial evidence to be ready as the window starts. Confirm the current rule on GOV.UK.
Sources — verified June 2026
Visa, fee and policy details change. Always confirm the latest on the official source before you rely on it.