An internship cover letter is four or five short paragraphs, 200 to 300 words, that answer four things: what you can already do, why this field, why this employer, and what you want to learn. Give most of the space to the first. Your evidence is coursework, projects, societies and part-time work, described by what you made and what came of it.
The sections below show how to write that description one line at a time. After that come three complete letters, from students in marketing, software engineering and laboratory science, and a template you can copy.
Key points
- Spend at least half the letter on what you can already do. Why you want the internship takes two or three sentences.
- Describe coursework by what you made, how big it was and what happened to it. A module title alone proves nothing.
- In a group project, name your own part: what you built, wrote or decided, next to what the group delivered.
- A society role or a weekend job is evidence once it has a task and a number: members, events, customers, money handled.
- Say what you want to learn in one sentence, and choose something the team does every day.
- Give your dates. An internship has a start and an end, and so does your availability.
In this guide
The four questions an internship letter answers
A letter for a permanent job argues that your record fits the role. An internship is, by design, a job for someone who has not done the job before, so the letter has more to explain. It answers four questions, and they do not get equal space.
| Question | Space in the letter | What answers it |
|---|---|---|
| What can you already do? | Two paragraphs, at least half the words | Things you made or ran: a report, a model, a program, an event, a shift |
| Why this field? | One sentence, often the opening | A choice you made when nobody set it as homework, with a fact attached |
| Why this employer? | Two sentences | One specific thing they make, publish or do, and what it has to do with you |
| What do you want to learn? | One sentence | A named skill or kind of work the team does every day |
A person with ten years in a job can leave the second and fourth questions out, because a work history answers them. You have to say them, briefly. The mistake is to let them take over: a letter that is mostly about your interest in the field and your hopes for the summer says very little about what you would do on a Tuesday morning in week three.
Why this field
One sentence, and it should contain a fact. Show your interest by what you did about it outside the timetable.
Weak
I have been passionate about marketing for as long as I can remember and am eager to begin my career in this exciting industry.
Strong
I chose marketing as my degree, and outside it I run the hiking society's Instagram account, which has grown from 310 followers to 1,150 since September.
The weak sentence states a feeling. The strong one reports two choices the writer made, and the second comes with a number she can be asked about.
Why this employer
Two sentences that could not be sent anywhere else. Ten minutes on the employer's own site is enough: find a product, a project, a published report or a stated way of working, then say what it has to do with you.
Weak
Tillwright is a leading technology company and I would be honoured to learn from its talented engineers.
Strong
Tillwright keeps taking sales when the connection drops. Our kiosk lost its network most afternoons, so I built a queue that holds sales on the device and sends them when the signal returns.
The weak version pays a compliment that fits any company. The strong one names what the product does and sets the writer's own project beside it.
What you want to learn
This is the sentence a job letter never needs and an internship letter should have. Keep it to one named thing, choose something the team does, and then return to what you bring.
Weak
I am looking for an opportunity to develop my skills, gain valuable industry experience and grow as a professional.
Strong
I would like to learn how a method is validated when its result decides whether a batch ships, and I can run routine assays to a written procedure while I do.
"Develop my skills" leaves the employer to work out what you mean. The strong version names one thing this laboratory does, and ends on what the writer offers in return.
Turn coursework into evidence, line by line
You have more to say than you think, but it is written down in the wrong form: as module titles, grades and memberships. Start with a list, not a letter. Write down every module with a practical element, every group project, your dissertation or final project, each society or team you did something for, and every job you have been paid for. Then put each item through the same four questions.
- What did you make or run? A report, a model, a campaign, a program, an experiment, an event, a rota. Start the sentence there, with you as its subject.
- How big was it? Pages, lines of code, samples, respondents, members, customers, money, weeks.
- What happened to it? A grade is one answer. Better ones: somebody used it, it was presented to a real client, it changed a decision, it is still running.
- Which line of the listing does it answer? Internship listings often name qualities, such as "good with detail" or "a quick learner". Treat each one as a request for evidence. If an item on your list answers none of them, keep it for another letter. Choosing the lines to answer is step 1 of How to write a cover letter.
Here is one line going through those four questions.
| Draft | What was added |
|---|---|
| "I studied Consumer Behaviour in my second year." | Nothing yet. This is a line from a transcript. |
| "In Consumer Behaviour I worked on a group project about a campus café." | A thing that was made, but not your part in it. |
| "In a Consumer Behaviour project I wrote the questionnaire and analysed the 180 responses." | Your part, and its size. |
| "I presented our recommendation to the café's manager, who is trialling it this term." | What happened to it. |
| "Your listing asks for someone to report on what each campaign achieved. In a Consumer Behaviour project I wrote the questionnaire..." | The line of the listing it answers. Now it is evidence. |
The same four questions work on every kind of university activity. The examples below belong to the three students whose full letters appear further down.
Coursework and modules
Name the module only if its title tells the reader something. What matters is the piece of work inside it: the assignment where you built, measured or wrote something close to what the internship involves.
Weak
Relevant coursework includes Databases, Operating Systems, Algorithms and Software Engineering.
Strong
When the daily sales report in our Software Engineering project took nine seconds to load, I traced it to a missing index and brought it under one second.
A list of modules says what was taught. One problem you solved inside a module says what you can do.
Group projects
A group project is the nearest thing to a job that a degree contains: a brief, a deadline and other people. Its weakness in a letter is the word "we". Say what the group delivered in one clause, then say what you did.
Weak
We worked together as a team to deliver a successful project, which taught me the value of collaboration and communication.
Strong
Five of us built a stock and sales tracker for a campus kiosk. I wrote the API and its 86 tests, and reviewed 61 of the team's pull requests.
The reader can now see the size of the team, the thing it produced and the writer's own share. The review count shows collaboration, so the word never has to appear.
Dissertations and final projects
A dissertation is months of self-directed work on one question, with a method and a result. Leave the title out unless it is short. Give the question in plain words, what you did to answer it, and what you found or produced.
Weak
My thesis, "Optimisation of Heterologous Expression of a Thermostable Lipase in Escherichia coli", was awarded a high mark.
Strong
For my thesis I tested twelve combinations of temperature and inducer concentration to raise the yield of an enzyme grown in E. coli, and took it from 3 mg to 11 mg per litre of culture.
The title was written for examiners. The strong version says what was tried, how many times and what changed, in words a non-specialist can follow.
If the dissertation is not finished, say where it stands. "I have run eight of the twelve conditions and will finish in March" is evidence too.
Societies, teams and volunteering
Membership proves little. A task you were given, or took, proves a lot, especially where money, a deadline or other people's time was involved. Committee roles are useful because they come with numbers: members, budget, events, attendance.
Weak
I am an active member of the university hiking society, which has developed my teamwork and leadership skills.
Strong
For the hiking society I replaced our event posters with photos of each route, marked with its distance and difficulty, and Sunday sign-ups rose from about 12 to 30.
The strong version has a decision and a result. It is also a small marketing campaign, which is the work the internship is for.
Part-time and holiday work
A job in a shop, a bar or a warehouse belongs in an internship letter even when it has nothing to do with the field. It shows things a degree cannot: you turn up, you deal with customers and money, and somebody trusted you with something. Find the task closest to the internship and lead with that.
Weak
I also have a part-time job in retail, where I have gained valuable customer service experience.
Strong
On Saturdays I work at a pharmacy, where I check expiry dates across 600 product lines each month and log the refrigerator temperature twice a shift.
For a laboratory internship, the second sentence is about accuracy and record keeping. The job did not change. The writer chose the part of it that fits.
More conversions
Five more, from other subjects and other parts of student life.
| What you did at university | How to say it in the letter |
|---|---|
| Took an accounting module | "I built a three-statement model of a listed retailer from its last three annual reports and defended the valuation in front of two lecturers." |
| Was treasurer of a society | "I keep the film society's budget of £2,400 and have reconciled it against the bank statement every month since October." |
| Wrote for the student newspaper | "The student paper has published nine of my articles, each cut to 600 words and filed by its Thursday deadline." |
| Entered a hackathon | "At a 24-hour hackathon three of us built a text service for bus arrival times. I wrote the part that reads the timetable data." |
| Worked in a bar | "I work two shifts a week at a bar, where I close up and count a till of about £1,800." |
Cover Letter Guru writes only from what is in your resume and does not invent experience or figures. Add your projects, dissertation and society roles to the resume, give it the internship listing, and it builds the letter from that evidence.
Write my internship letterThe letter, paragraph by paragraph
Keep it to 200 to 300 words in four or five short paragraphs. That is a little under the 250 to 400 we give in How to write a cover letter, because you have two pieces of evidence to describe and no career to select from. If yours runs past 300, look for sentences about your intentions and cut those first. How long should a cover letter be? shows one letter at three lengths.
- Opening: your best piece of evidence, or your reason for the field with a fact in it. Follow it with your year and degree subject, since some schemes are open only to particular years, and the internship by its exact name. There are more ways in at How to start a cover letter.
- Second paragraph: the project closest to the work. What you made, how big it was, what happened to it, and which line of the listing it answers.
- Third paragraph: a second kind of evidence. If the first was coursework, make this one a society, a job or a side project, so the reader sees you outside the classroom as well.
- Fourth paragraph: why this employer and what you want to learn. Two or three sentences.
- Last line: your dates. The first and last day you are available, and when you are free to talk.
Weak
I am available over the summer and look forward to hearing from you at your earliest convenience.
Strong
I am free from 8 June to 11 September and could start in the first week. I can talk on any weekday after two, when my lectures finish.
An internship has fixed dates, so give yours. The second sentence saves a round of emails about when to call.
Three internship letters in three fields
Each letter below is written to one listing and is built only from things a student has: modules, a group project, a thesis, a society, a weekend job. None of them describes its writer with an adjective. The tones differ because the employers do: a small consumer brand that writes informally, a software company that values plain speaking, and a laboratory in another country.
Marketing internship at a consumer brand
Second-year marketing student applying for a ten-week summer internship at an outdoor clothing and footwear company · Creative tone · 266 words
Dear Ms Tindall,
When I took over the hiking society's Instagram account last September, it had 310 followers and a feed of event posters1. I swapped the posters for photos of each route, with the distance and the difficulty written across the picture. The account now has 1,150 followers, Sunday sign-ups have gone from about 12 to 30, and we have had to hire a second minibus2.
I am a second-year marketing student, and I would like to spend ten weeks doing that kind of work as Cairnfoot's summer marketing intern. Your listing asks for someone to help with social content and the email newsletter3, and to report on what each campaign achieved.
The newsletter I can start on in my first week. Since March I have written the fortnightly email for Hollin Garden Centre, where I work on Saturdays. It goes to 900 customers, and the plant-of-the-week slot I added is the most clicked link in every issue. The reporting I have practised in my Consumer Behaviour module: four of us tested a loyalty card for a campus café, and I wrote the questionnaire, analysed the 180 responses and presented the result to the manager, who is trialling our change this term.
I have walked in the same pair of Cairnfoot boots for three winters and had them resoled through your repair scheme in January4. I would like to learn how you plan a season of content around a product that people keep for years.
I am free from 14 June to 3 September and can talk any afternoon after three.
Kind regards, Zainab Chaudhry
Why this works
- 1The opening is a before picture. It answers "why marketing" without the word interest: she is already doing the work, unpaid.
- 2A result the reader can picture. The creative tone has room for a detail like this as long as it is also evidence.
- 3The listing's three duties are the plan for the letter. The opening answered the first; the next paragraph takes the other two.
- 4Why this employer, in a fact only a customer would know. The sentence after it says what she wants to learn, once, and stops.
Software engineering internship
Final-year computer science student in Nairobi applying for a twelve-week backend internship at a payments software company · Confident tone · 250 words
Dear Tillwright Engineering Team,
Last term a campus kiosk recorded 3,400 sales on software I helped build1. I am a final-year computer science student in Nairobi, and I am applying for your twelve-week backend engineering internship.
The kiosk tracker was our Software Engineering group project. Five of us built it; the API was mine.2 I wrote its 14 endpoints in Python on a PostgreSQL database, with 86 tests that run on every pull request. When the daily sales report took nine seconds to load, I traced it to a missing index and a query that ran once per product3, and brought it under one second.
Your listing asks for someone who writes tests without being asked and is at home in code review. Nothing reached our main branch without a second reader4, and I reviewed 61 of the team's pull requests. On Thursdays I am also a lab demonstrator for the first-year programming course, where 30 students bring me programs that do not work and I find out why.
Tillwright keeps taking sales when the connection drops. Our kiosk lost its network most afternoons, so I built a queue that holds sales on the device and sends them when the signal returns. It works for one kiosk.5 I want to learn what changes when the same idea has to work for thousands of shops.
I am available from 3 May to 23 July. I can share the repository and walk you through any part of it.
Kind regards, Wanjiru Kamau
Why this works
- 1A student project that people used. The count of sales is the proof, and "helped build" is honest that it was a team's work.
- 2Nine words that fix the usual problem with group projects: the size of the team first, then the writer's own part.
- 3One problem, with its cause named. Detail at this level is hard to write about work you did not do yourself.
- 4The listing asks about code review. She answers with how the team worked and a count of her own reviews.
- 5She gives the true scale of her project, then asks the question that follows from it. That question is what she wants to learn.
Laboratory internship in another country
Master's student in biotechnology in Valencia applying for a summer placement in a quality control laboratory in Cork · Professional tone · 287 words
Dear Dr Hegarty,
For my master's thesis I raised the yield of a recombinant lipase expressed in E. coli from 3 mg to 11 mg per litre of culture1, by testing twelve combinations of induction temperature and inducer concentration. I am a master's student in biotechnology in Valencia, and I wish to apply for the summer internship in your quality control laboratory.
Your listing asks for experience of protein assays and for records that another analyst could follow2. I purified each batch by nickel affinity chromatography, checked its purity by SDS-PAGE and measured concentration by Bradford assay in triplicate. Every run is recorded in a bound notebook that my supervisor reviews and signs each Friday. In the Analytical Techniques module I also ran HPLC on sets of 40 samples from a written procedure, and I have written 14 laboratory reports this year.
For two years I have also worked Saturdays at a pharmacy. I check expiry dates across 600 product lines each month and log the refrigerator temperature twice a shift3, so I am used to work in which a missed entry matters.
Glasheen's quality control laboratory tests every batch of enzyme before it is released. I would like to learn how a method is validated when its result decides whether a batch ships, and I can run routine assays to a written procedure while I do.
I can be in Cork from 7 June to 27 August and have a room arranged for those dates4. As a Spanish citizen I need no permit to work in Ireland. My thesis and this year's reports are written in English. I would be glad to speak by video call at any time that suits you.
Yours sincerely, Mateo Rojas
Why this works
- 1The thesis is described by its result and its method in one sentence. Its title never appears.
- 2The listing's own phrase. The next three sentences answer it: the techniques, the signed notebook, the written procedure.
- 3A pharmacy job has little to do with protein chemistry and a good deal to do with quality control. He picked the task that fits.
- 4An applicant from another country answers the practical questions before they are asked: dates, somewhere to live, the right to work, working language and how to hold the interview.
These letters use three of Cover Letter Guru's four tones: creative, confident and professional. The fourth is friendly. Generate yours from your resume and the listing, then press Regenerate for a version with a new opening, or Shorter if the form has a word limit.
Pick a tone and startFor letters from school leavers and people applying for a first job, see Cover letter with no experience. For other jobs and levels, see Twelve cover letters that work, annotated.
Applying in another country or another language
An internship abroad adds three questions to the four above: are you allowed to work there, can you work in the language, and when can you be there. Answer them in the last paragraph, in a sentence each, as Mateo's letter above does.
- Write in the language of the listing. If the advert is in German, the letter is in German, unless it says otherwise. If the advert is in English but the team works in another language, write in English and say what level you have in theirs.
- Prove the language with a fact. "Fluent" is an adjective. "I took two modules taught and examined in French" is evidence. If you hold a certificate, give its name and level.
- Give dates and a place. Say when you can arrive, when you must leave, and whether you have somewhere to stay.
- State your right to work plainly. If you already have it, one clause is enough. If you would need a visa or a permit, read the official government guidance for that country before you apply, and what the listing says about it. Do not guess.
- Check local conventions. Countries differ on whether a photograph or a date of birth is expected, on how formal the greeting should be, and on how grades are described. Look at the employer's careers page and at advice from a careers service in that country, and give the scale for any grade you quote.
- Ask a fluent speaker to read it. A letter is short, so this is a small favour. Send a letter in a language only if you could hold the interview in it.
Cover Letter Guru writes letters in 16 languages: English, Spanish, French, Portuguese, German, Italian, Irish, Russian, Ukrainian, Japanese, Chinese, Hindi, Bengali, Urdu, Arabic and Thai. In every one of them it writes only from what is in your resume.
Write it in another languageAn internship cover letter template
Replace everything in square brackets. If you cannot fill a bracket in the two evidence paragraphs, go back to your list of modules, projects, societies and jobs before you write anything else.
Internship cover letter template
Dear [Name, or Hiring Manager], [The best thing you have made or run that fits this internship, with a number.] I am a [year] [degree subject] student at [university], and I am applying for [exact name of the internship]. Your listing asks for [requirement 1, in its own words]. In [module, group project or dissertation], I [what you made or did, with you as the subject]. [How big it was: people, pages, samples, users, weeks.] [What happened to it: who used it, what it changed, how it was marked.] [Requirement 2 from the listing.] Outside my course, I [your role in a society, a job or a side project]. [The task closest to the internship, with a number.] [What came of it.] [One specific thing this employer makes, publishes or does.] [What it has to do with you.] I would like to learn [one named skill or kind of work this team does]. I am available from [date] to [date] and can talk [days and times]. Yours sincerely, [Your name] [Phone] | [Email]
A frame gets the order right and nothing more. Two students who start from this template should finish with letters that share only the greeting.
Six signs your letter reads like a template
- The employer's name could be swapped. Replace it with a rival's and read the letter again. If nothing else needs to change, the paragraph about them is not about them.
- It lists modules. Pick one piece of work and describe it.
- Every project is "we". Find your own part and give it a sentence of its own.
- It runs on adjectives. Strike out passionate, motivated, hard-working and eager. What is left is your letter.
- It is mostly about what you will gain. One sentence on what you want to learn. The rest on what you would do.
- It has no dates. Add when you can start, when you must finish and when you can talk.
Common questions
- How long should an internship cover letter be?
- Between 200 and 300 words, in four or five short paragraphs. That is a little under the 250 to 400 we give for a standard letter, and it is room for two pieces of evidence, two sentences about the employer, one about what you want to learn, and your dates. If the application gives you a text box with a limit, keep the opening evidence and the dates and cut from the middle.
- What do I write if I have never had a job?
- Use coursework, a group project, a dissertation or a society role, each described by what you made, how big it was and what happened to it. The three letters in this guide are built mostly from that. For school leavers and first jobs, see Cover letter with no experience.
- Should I mention my grades in an internship cover letter?
- Mention a grade if the listing sets a minimum, or if a high mark belongs to a piece of work that fits the internship. Put it after the description of the work and never in its place. Otherwise leave grades on your resume.
- Can I send the same letter to several internships?
- You can reuse your evidence, because your best project stays your best project. The opening, the lines of the listing you answer and the paragraph about the employer have to be written again each time. A practical way is to keep a file of evidence sentences and build each letter from it.
- Should I write a cover letter if the internship application says it is optional?
- We suggest writing one. A student resume is short, and the letter is the one place where you can explain what a project involved and why you chose this employer. The wider question is covered in Do you still need a cover letter in 2026?.
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