Follow-Up Email to a PhD Supervisor

There is no published rule on this, so the convention below is exactly that, a convention, drawn from how academic inboxes are actually cleared. It works because it is long enough to be polite and short enough to arrive while the original message is still findable.

Ten to fourteen days after the first email. Under a week reads as pressure, and past three weeks the original context has gone.

Earlier only when a real external deadline forces it, in which case say what the deadline is and why it moved you.

Never during the first week of term, the week of a major conference in the field, or the last days of December. The email will not be read, and you will have used your one follow-up.

Reply inside your original thread rather than starting a new one, so the first message is directly above yours.

Send it once. The single most common mistake in this whole process is the third and fourth message, which changes a neutral non-reply into an unfavourable impression.

The straightforward case. Keep it to four sentences, repeat the ask in one line, and add one genuinely new thing so the message is not merely a reminder that you are waiting.

Subject: Re: PhD enquiry, [topic] for [year] start

Dear Dr [Surname],

I wrote a fortnight ago about a PhD in [topic] and I know this is a busy period, so I am following up once in case the message was missed.

Since writing, [one new and relevant thing: my thesis was submitted, the preprint is now online at [link], I presented this work at [conference]].

If you are not taking students for [year], I would be grateful to know so I can focus elsewhere, and I would welcome any suggestion of a colleague working on [topic].

Thank you for your time,
[Full name]

Keep the original subject line with "Re:" and reply in the same thread. Rewriting the subject hides the context you want them to see.

Say plainly that you are following up once. It signals you will not be sending a third message, which makes the reply easier to give.

Add one new fact. A submitted thesis, a posted preprint, a conference talk or a new result gives the recipient a reason to reopen the file rather than to feel chased.

Offer the easy exit

a single line inviting them to say no. A short refusal is far more useful to you than continued silence, and people give it when the message makes it simple.

Ask for a referral in the same sentence. Suggesting a colleague costs almost nothing and is the request most often granted.

Do not re-attach the CV or restate your whole case. The first email is one scroll away.

The other situation, and the more delicate one. Someone was positive, said they would check something, and then nothing happened for three weeks. Here you are not chasing attention, you are chasing a specific outstanding item, which makes the message easier to write and easier to answer.

Subject: Re: [Topic] PhD, following our call on [date]

Dear Dr [Surname],

Thank you again for the call on [date]. You mentioned you would check [the specific thing: whether the [scheme] round covers a student for this project, whether the group has a place for [year]], and I wanted to follow up on that as the [application or scholarship] deadline is [date].

To confirm what I understood: the project would centre on [one sentence], starting [term or date], with the application going through [route].

If it would help, I can send [the one useful thing: a two-page outline, my transcripts, the reference contacts] this week. If the position is no longer likely, please do say, and thank you for the conversation either way.

Best wishes,
[Full name]

Name the outstanding item precisely. "You mentioned you would check X" is a question with a one-line answer, which is what gets replied to.

State the deadline that makes the timing real. A date is a reason; impatience is not.

Repeat your understanding of what was agreed in one or two lines. It creates a written record and gives them a chance to correct a misunderstanding cheaply.

Offer to supply something concrete rather than asking for a decision. It moves the exchange forward without demanding an answer they may not yet have.

Close the loop gracefully. Making it easy to say no is what keeps the contact useful for later, and fields are small.

If a written commitment about funding or duration was made on the call, this message is the right place to record it in writing.

After one follow-up, the return on further messages is negative. That is not the end of the process, it is a redirection of effort, and there are better places to put it.

Two messages, then stop. Silence after a follow-up is a no in practice, whatever it is in intention.

One exception

genuinely new information, such as your paper being accepted or a scheme opening that names their group. A message with real news is not a third chase, but it should be short and it should not mention the earlier silence.

Send the remaining energy to two new candidates instead. The shortlist exists precisely so that one non-reply is not an event.

Keep the thread. Reopening a polite exchange nine months later, when a position is advertised, works and starts much warmer than a cold email.

If the department has an admissions contact or a doctoral school, ask them instead. They answer administrative questions faster than any individual supervisor, and asking them is not a way around the supervisor.

Watch what the pattern tells you. Weeks of silence during recruitment, followed by pressure to decide quickly, is one of the signals worth taking seriously in supervisor red flags.