By You need a cover letter for an internship when the application asks for one, and it is worth writing an optional one for smaller employers you genuinely want. Keep it to three short paragraphs: why this company and role, one or two specific pieces of evidence that match the posting, and a short close. Many large company internship applications do not ask for one at all.
Students tend to make one of two mistakes: spending an hour on a letter nobody will read, or skipping the one letter that would have made the difference at a small company. The rule below fixes both.
When you need one, and when you do not
| Situation | Write one? |
|---|---|
| The application requires a cover letter | Yes, always. A missing required document can end the application. |
| Optional, at a startup, nonprofit, lab, or small company | Yes. They are more likely to read it, and it shows real interest. |
| Optional, at a large program with a structured process | Only if you can make it specific in about ten minutes. |
| No upload field and no mention of one | No. Put that effort into tailoring your resume instead. |
| Applying by email to a person | The email itself is the cover letter. Keep it shorter still. |
The last row deserves a note: a direct email to a founder or manager does the job of a cover letter in about half the words. Templates for that are in how to cold email for an internship.
The three paragraph structure
- Why this role, here. Name the role, and one specific reason you want to do it at this company: a product you use, a problem they work on, something they published.
- Your evidence.One or two concrete examples that match the posting's requirements, each with a result. This paragraph carries the letter.
- A short close. What you would bring, your availability (dates, location), and thanks. Two or three sentences.
A cover letter is not a second resume. It is one argument: here is the thing you need, and here is proof I have done something like it.
A template you can adapt
Dear [Name or Team] Hiring Team, I'm applying for the [Role] internship for [Season Year]. I'm a [year] [major] student at [School], and I've been [using / following / reading about] [specific product, project, or work of theirs]. [One sentence on why that makes you want this role in particular.] The posting mentions [requirement from the job description]. Last [term / summer], I [what you did], which [result, with a number if you have one]. I also [second example tied to a second requirement], so I'm comfortable [skill the role needs]. I'd bring [one or two strengths that connect to the team's work], and I'm available from [start date] to [end date] in [location or remote]. Thank you for your time, and I'd welcome the chance to talk about the role. Sincerely, [Name] [Email] | [LinkedIn or portfolio]
Save it once. For each new application, you only rewrite the bracketed parts of the first two paragraphs. With practice, that takes about ten minutes.
The two lines that do the work
Most of a cover letter can stay the same between applications. Two lines cannot.
The “why them” line
I am excited to apply to your company because of its innovative culture and commitment to excellence.
I've used [Product]'s offline mode on every commute this year, and I'd like to work on the sync problems that make it feel instant.
Specific enough that it could only be sent to one company.
The evidence line
I am a hard working team player with strong communication skills.
As treasurer of a 60 member club, I rebuilt our budget tracker in Google Sheets and cut the time to reconcile each event from two hours to twenty minutes.
Action, scale, and a result, matched to a posting that asks for organization and spreadsheets.
If you are short on evidence, the seven options in how to get an internship with no experience all work here, and the same tailoring method you use for your resume, covered in how to tailor your resume to a job description, tells you which requirement to target.
Mistakes that make a letter worse than none
- The wrong company name.The most common and most fatal template error. Search the letter for the last company's name before every upload.
- Repeating the resume. If a sentence could be a resume bullet, it probably is one already. Use the letter for connection and context.
- Adjectives without proof. Passionate, hard working, detail oriented. Show one example instead.
- Length. More than a page, or more than about 350 words, and it will be skimmed.
- Apologizing for inexperience.Do not write “although I do not have much experience.” Lead with what you have done.
Then make sure the rest of the application is just as careful. Screening questions answered inconsistently can reject you before anyone reads the letter, as covered in why you keep getting auto rejected.
Common questions
- Do you need a cover letter for an internship?
- Only when the application asks for one, or when it is optional at a smaller employer you really want. Many large company internship applications do not request one; Google's software intern postings, for example, ask for a resume and transcript. Startups, nonprofits, research labs, and smaller companies are more likely to ask, and more likely to read it.
- How long should an internship cover letter be?
- Three short paragraphs, roughly 200 to 300 words, on one page. Long enough to connect one or two pieces of your experience to the role, short enough to read in under a minute.
- What do I write in an internship cover letter with no experience?
- Use the same evidence as your resume: a project, a course, a campus role, or a part time job, with a specific result. Connect it to one requirement in the posting. You do not need past internships to write a strong letter; you need one concrete example.
- Should I submit a cover letter if it is optional?
- If you can write a specific one in ten minutes, yes, especially at smaller employers. If all you can write is generic, skip it. A generic letter adds nothing and can make a good resume look less careful.
- Who do I address an internship cover letter to?
- The hiring manager or recruiter by name if the posting or a quick search tells you. Otherwise, Dear Hiring Team or Dear [Team name] Hiring Team works. Avoid To Whom It May Concern.
Stop retyping the same application.
Save your answers once. ApplyAgents fills Workday, Greenhouse, Lever, and more.
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