Guide · Applications

PhD motivation letter: structure, what supervisors look for, mistakes to avoid

Updated 18 October 2026 · Practical writing guide · No invented examples of admission rates

A PhD motivation letter (sometimes called a statement of purpose or cover letter for a vacancy) has one job: show a busy supervisor or selection panel that your training matches the project and that you understand what the group actually does. This guide gives a reusable structure, what panels tend to weigh, and common mistakes that weaken otherwise strong CVs.

What the letter is for

The letter does not replace your CV. It interprets the CV for one specific opening. It answers: Why this project? Why this group? Why you, with these methods, now? If a paragraph does not help answer one of those questions, cut it.

For advertised, funded posts (common in Germany and the Netherlands), the letter should map your skills to the job description. For open graduate-school calls, it should show research readiness and a coherent interest area, even if the final project is assigned later.

A clear structure that panels can skim

1. Opening (3–5 lines)

Name the exact position or programme, where you saw it, and your current status (degree, institution, graduation date). State your research focus in one concrete sentence—methods and domain, not a slogan.

2. Fit to the project (the longest section)

Pick two or three requirements from the advert and show matching evidence: a thesis method, a paper, an internship assay, a dataset you built. Cite the group’s relevant papers or work packages by name. Explain briefly how you would approach the first six to twelve months if that helps demonstrate realism.

3. Preparation and trajectory

Summarise the path that made you ready: key coursework, tools, languages, fieldwork, or industry experience. Keep chronology light; the CV already has dates.

4. Practical close

Confirm availability to start, any hard constraints only if necessary, and that referees are ready. Thank the reader and offer to provide further materials.

Target length unless otherwise specified: roughly one to two pages. Use the same formal tone as the advert’s language (English or local language).

What supervisors look for

• Method match — Can you learn or already run the core techniques?
• Evidence over adjectives — “Optimised a qPCR panel used in N samples” beats “passionate wet-lab researcher.”
• Reading the group — Specific papers, grants, or facilities show homework.
• Scope sense — A proposal that fits a PhD timeline beats a manifesto.
• Communication — Clear English (or required language), no filler, consistent naming of tools and organisms.

Panels also check consistency with your CV and transcripts. Do not claim skills the rest of the file does not support.

Mistakes to avoid

• Generic praise of the university’s “world-class reputation” with no project detail
• Recycling the same letter with only the institution name changed
• Long childhood stories or hardship narratives unless the call explicitly invites personal context
• Listing every paper the PI has written without connecting them to your skills
• Promising results you cannot deliver or criticising previous supervisors
• Ignoring stated page, word, or file-format limits
• Forgetting to name the exact vacancy code or supervisor when the portal asks for it

Country and call differences

Germany: Structured IMPRS or graduate-school calls may ask for a research statement plus preferences among several labs. Individual TV-L/TVöD vacancies behave more like job applications—mirror the requirements list. See Funded PhD positions in Germany.

Netherlands: Vacancy-based PhD posts under CAO-NU expect a tight fit to the project description and often a short interview task. See Funded PhD in the Netherlands.

UK and elsewhere: Some programmes separate “personal statement” and “research proposal.” Follow the portal labels exactly; do not merge files if they ask for two uploads.

Example outline (fill with your facts)

Use this only as a scaffold. Replace every bracket with evidence from your CV:

• Paragraph 1: “I am applying for [exact vacancy title/code] in [group]. I am completing/completed a [degree] in [field] at [institution] with a thesis on [topic using method X].”
• Paragraph 2: Map requirement A from the advert to project or paper B you did; quantify samples, datasets, or outcomes where honest.
• Paragraph 3: Map requirement C to further evidence; name one or two of the group’s papers or work packages and how your skills transfer.
• Paragraph 4: Brief trajectory and tools (languages, software, instruments). No adjective stacks.
• Paragraph 5: Availability, referees ready, polite close.

Do not invent publications, awards, or grades. If a result is under review, say “manuscript under review” only if true.

Tone, length, and formatting

Prefer short sentences and concrete nouns. Write in the first person without bravado. Use the same spelling variant as the advert (British or American English). Submit PDF unless the portal forbids it. Name files like Familyname_Motivation_Group.pdf.

If the call asks for both a motivation letter and a separate research proposal, do not paste the proposal into the letter. Cross-reference lightly (“My two-page proposal details the first-year milestones”) and keep roles distinct.

Revision pass that catches weak letters

Read the letter once while looking only at the vacancy text: highlight every requirement you answered. Read it a second time with the CV beside you: highlight every claim that lacks backup. Ask a colleague to remove the institution name and guess which group you applied to—if they cannot tell, the fit section is still generic.

Finally, check portal fields: vacancy ID, preferred supervisor, and any diversity or eligibility questionnaires. A strong letter cannot fix a missed checkbox.

Pre-submit checklist

• Every claim in the letter appears somewhere on the CV or transcript
• Project-specific paragraphs mention methods or papers unique to this group
• Word/page limit respected; PDF filename is professional
• Referees warned and given the vacancy title and deadline
• You have reread the eligibility rules (degree date, language score, nationality constraints)

FridayScout can prepare a tailored draft inside an application pack for openings you choose from your shortlist. You remain the author of record and you submit yourself.

After you submit

Record the date, portal confirmation number, and any automated email. Do not nudge the panel unless the advert gives a contact window. If you are waitlisted or asked for more material, answer within the stated deadline with the same factual tone as the letter.

When you interview, reuse the fit paragraphs as talking points—methods first, motivation second. Bring questions about supervision style, coursework requirements, and the first-year deliverables. Those questions show you are evaluating fit too.

FAQ

How long should a PhD motivation letter be?

Unless the call sets a limit, aim for about one to two pages (roughly 500–900 words). Panels skim; every paragraph should earn its place.

Should I email professors before applying?

Only when the call encourages contact, or when you are proposing a topic rather than answering a fixed vacancy. Keep any cold email short, specific, and attached to a clear ask.

What do supervisors actually look for?

Evidence you can do the work: methods match, prior results or coursework, realistic scope, and that you read their recent papers—not flattery or a life story.

Can I reuse one letter for many openings?

Reuse a skeleton of your background, but rewrite the fit paragraphs for each project. Generic letters are easy to spot and easy to reject.

Does FridayScout write the letter for me?

For clients who choose an application pack, we prepare a tailored draft from your materials. You edit it in your own voice and submit it yourself. We never submit on your behalf.