How long can I stay in the UK?
The Home Office limits the time you can spend studying in the UK on a Tier 4 (General) student visa. You are generally limited to a "maximum of five years" in the UK studying at undergraduate and/or Master’s degree level. If you are 18 years old or over and are studying a course below degree level, you can spend a maximum of 2 years in the UK studying below degree level.
To find out more please visit the UKCISA webpage on time limits: How long can I stay in the UK?