To apply for a UK Tier Visa, applicants typically need to meet specific eligibility criteria, including possessing a valid Certificate of Sponsorship (COS) from a UK employer (for Tier 2 visas), admission into a UK educational institution (for Tier 4 visas), or sponsorship for temporary work or study placements (for Tier 5 visas). Additionally, applicants may need to demonstrate proficiency in the English language and provide evidence of sufficient funds to support themselves during their stay in the UK.

The application process usually involves completing an online application form, paying the applicable fees, and providing supporting documents such as passport, biometric information, financial statements, and proof of qualifications or sponsorship. Depending on the visa type, applicants may also need to attend an interview or undergo a medical examination as part of the application process.