Great question! In the UK, the standard post-study work visa is called the Graduate Route, which allows international students to stay and work (or look for work) after completing their degree:

- Undergraduate (Bachelor’s) and Master’s degrees: 2 years post-study work visa
- PhD or Doctoral degrees: 3 years post-study work visa

So, courses that offer the longest post-study work visa in the UK are PhD or Doctoral programs.
If you complete a PhD, you are eligible for a 3-year post-study work visa under the Graduate Route.

Other Points:

- No specific course (like MBA, Engineering, etc.) itself offers a longer visa—the duration depends on the level of qualification, not the subject.
- If you pursue a Bachelor’s or Master’s degree (in any subject), you are eligible for a 2-year Graduate Route visa.
- If you pursue a PhD or other doctoral-level qualification (in any subject), you are eligible for a 3-year Graduate Route visa.

Pathway to Permanent Residency

After your Graduate Route visa, you may be able to switch to a Skilled Worker visa, which can eventually lead to permanent residency if you meet eligibility requirements.

Would you like guidance on PhD/Doctoral programs in the UK, or help choosing the right course or university?
Feel free to let me know your area of interest, and I can recommend some top universities and programs!