The Immigration Rules at paragraphs 245G of part 6A, and Appendix A, B and C, explains the requirements to be eligible to extend under the Tier 1 general category.

The points-based assessment

To apply under Tier 1 (General), you must pass a points-based assessment. You must score:

1.    75 or 80 points for your attributes (age, qualifications, previous earnings, and experience in the UK); and

2.    10 points for your English language skills; and

3.    10 points for available maintenance (funds).

If you do not score enough points, your application will be refused. You should read all the information in this section before you apply. You must pay the correct application fee when you apply, and send the correct supporting evidence to support your application. If your application is unsuccessful because you do not meet the requirements, Home Office will not refund your fee.

See the section on costs for details of the application fee. If you have an HSMP approval letter, you should read the section on transitional arrangements for the Highly Skilled Migrant Programme. If you meet the requirements in this section, the Applying section tells you how you can make your Tier 1 (General) application.