This question likely doesn't make much sense in the US and other countries where separate Master's degrees are uncommon. However, here in Canada, the vast majority of graduate students must first apply for a Master's degree, and then apply for a PhD program (usually filling out applications during their Master's degree, as the deadlines fall).

Students are highly discouraged from completing their undergrad, Master's, and PhD all at the same school for many reasons. But it seems quite common to do one's undergrad at one school, then both grad degrees at the same school.

My question is: how common is it for students in this situation to be rejected from a PhD program at the school where they are currently doing their Master's? And what might be reasons for such a rejection? I imagine that some reasons would be lack of willing supervisors (which begs the question of how they were accepted for the Master's anyway), unsatisfactory work during the Master's degree, or some extreme situation such as academic dishonesty.

My field is math, so I guess we can restrict the question to that discipline, but I'm curious about answers from all fields.

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    I've added the canada tag, as, for example, in most of Europe it is not at all the norm that one pursues a PhD after a Masters degree.
    – Servaes
    Dec 13, 2020 at 23:17
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    @servaes really? I would say the situation in Europe is exactly the opposite: the vast majority of PhD courses require you to have a Masters. Dec 13, 2020 at 23:47
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    @astronat Both your statement and that of Servaes can be true at the same time; they have different denominators.
    – shoover
    Dec 14, 2020 at 2:31
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    @astronat That is indeed true. What I meant is that the vast majority of students that start (or finish) a Masters degree have no intention of pursuing a PhD. In this context the question doesn't quite make sense, hence the tag. I hadn't considered your alternative reading of my comment.
    – Servaes
    Dec 14, 2020 at 9:24
  • I don't think separate Master's degrees are uncommon (but yes, among PhD-bound people, less common than Europe). Dec 14, 2020 at 15:00

1 Answer 1


One very obvious thing would be availability. My department has around 100 masters students each year, but will only have 7 PhD places. We pretty much take as many masters students as we can (because they pay). As you can imagine, this is not always popular with the people that have to supervise them for their dissertations.

Master degrees are funded by the student (either directly, or via a loan). PhD positions are funded by external funding bodies or scholarships.

  • In Canada this is not true: at least in Science, a Master's is funded like a PhD is, though usually it pays less. Dec 19, 2020 at 1:09

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