How long you can stay depends on the length of your course and what study you’ve already completed in the UK. If you’re 18 or over and your course is at degree level, you can usually stay in the UK for up to 5 years. If it’s below degree level, you can usually stay in the UK for up to 2 years. How long you can stay depends on the length of your course and what study you’ve already completed in the UK. If you’re 18 or over and your course is at degree level, you can usually stay in the UK for up to 5 years. If it’s below degree level, you can usually stay in the UK for up to 2 years. How long you can stay depends on the length of your course and what study you’ve already completed in the UK. If you’re 18 or over and your course is at degree level, you can usually stay in the UK for up to 5 years. If it’s below degree level, you can usually stay in the UK for up to 2 years.