Why is a TB test needed at all?
A TB test is a public-health screening requirement, not a talent test: the UK asks applicants from countries with higher tuberculosis prevalence to confirm they are clear of infectious TB before coming to live in the UK. GOV.UK publishes the definitive list of countries whose residents must be tested, and whether you need a certificate turns entirely on where you are applying from - not your nationality or your role. If your country is on that list and you are staying for more than six months, a certificate is mandatory; otherwise it does not apply.
Does it apply to the endorsement stage or the visa stage?
The TB test applies only to the visa stage, never to the Tech Nation endorsement. The Global Talent Visa has two stages: Stage 1 is the endorsement, where Tech Nation assesses your evidence against the Digital Technology criteria, and Stage 2 is the visa application to the Home Office. The endorsement is a paper assessment and involves no medical test. A TB certificate, where required, is submitted only with the Stage 2 application that follows a successful endorsement - so it is never a barrier to being endorsed.
Who is exempt from the TB test?
You are exempt if you are applying from a country not on the GOV.UK list, or if you are already inside the UK switching to the Global Talent Visa. This matters for Skilled Worker visa holders already living in the UK: because the requirement targets people arriving from listed countries, an in-UK switch does not trigger a TB test. Certain other cases, such as brief transit through a listed country, may also fall outside it - but these are decided by current GOV.UK guidance, so confirm your position there.
How do you get and evidence the certificate?
If you do need a test, you must attend a clinic approved by the Home Office in your country of application, and the certificate is valid for six months from the date of the test - so book close to when you intend to submit. The test is a chest X-ray and, where indicated, further screening; the cost is paid directly to the clinic and is separate from the £561 endorsement fee and the £205 visa fee. Only certificates from the approved clinic list are accepted, so check it on GOV.UK before booking.
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Frequently asked questions
Only if you are applying from one of the countries GOV.UK lists as requiring a TB test certificate, and you are coming to the UK for more than six months. If your country is not listed, or you are already in the UK switching visas, no certificate is required. Check the current list on GOV.UK before booking.
Only the visa stage, not the Tech Nation endorsement. The endorsement is a paper assessment of your evidence and involves no medical test. The TB certificate, where required, is submitted with the visa application that follows a successful endorsement.
No. The requirement applies to people coming to the UK from a listed country. If you are already in the UK switching to the Global Talent Visa, for example from a Skilled Worker visa, no TB certificate is required. Confirm your position on GOV.UK.
Six months from the date of the test, so obtain it close to when you intend to submit your visa application. The test must be carried out at a Home Office-approved clinic in your country. Check the approved clinic list and current validity on GOV.UK.
It varies by clinic and country and is paid directly to the approved clinic, not the Home Office. It is separate from the £561 endorsement and £205 visa fees. Confirm the current price with your clinic and check the requirement on GOV.UK.
Related reading: full cost breakdown, processing time, switching from Skilled Worker, the ten-document evidence pack and the pain points hub.
Last updated: 6 July 2026. Facts verified against GOV.UK on 6 July 2026 - always confirm current requirements before applying.