How to Write an Internship Cover Letter (Template + 3 Examples)

Often, no. Many tech, startup, and high-volume campus applications never get a cover letter read; the resume and the online assessment do the filtering. But there are three situations where a strong letter genuinely moves you forward:

• The posting asks for one. A missing letter on a "required" field is an easy reason to cut you.
• You are a non-obvious fit. Switching majors, applying from a non-target school, or coming from a non-US background — the letter is where you explain the story your resume cannot.
• Smaller teams and mission-driven orgs. Nonprofits, policy, media, consulting boutiques, and early-stage startups are far more likely to have a human read every letter.

Rule of thumb: write a tailored letter for your top 10–15 targets. For the long tail of applications, put that time into networking instead.

Recruiters skim. A letter that fits on half a page and has one clear idea per paragraph gets read; a full page of "I am a passionate, hard-working student" does not.

1. The hook (2–3 sentences). Name the exact role and the one specific reason you want this company — a product you use, a team's public work, a talk someone gave at your school. Never open with "My name is…".
2. The proof (4–5 sentences). One story, told with a number. Pick something that shows the core skill of the role and is not already a bullet on your resume — or expand the most relevant bullet into the full context.
3. The connection (2–3 sentences). Tie that story to what the team actually does. This is the paragraph that proves you read the posting.
4. The close (1–2 sentences). Thank them, restate interest, and say you would welcome a conversation. No "I look forward to hearing from you at your earliest convenience."

Replace every bracket. If you cannot fill a bracket with something specific, that is a sign you need to research the company more before applying.

Dear [Hiring Manager's name, or "[Team] Hiring Team"],

I'm applying for the [Role] internship on [Team] because [specific reason tied to the company — product, project, public work]. As a [year] [major] student at [School], I've spent the last [timeframe] [doing the core activity of the role].

[One story: situation → what you did → measurable result. 4–5 sentences.]

That experience is why [team's specific work, from the posting or their blog] stands out to me. I'd bring [1–2 skills from the posting you have actually demonstrated] and I'm eager to learn [something real the team does].

Thank you for your time — I'd welcome the chance to talk about how I could contribute this summer.

[Full name]
[Phone] · [Email] · [LinkedIn URL]

Hook: "I'm applying for the Software Engineering Intern role on the Payments team because I've used your API to build the checkout for my campus club's ticketing site, and the docs were the reason I got it working in a weekend."

Proof: "Last spring I rebuilt that ticketing site in Next.js and Postgres. It now handles sales for 14 student organizations and processed about 3,000 tickets this semester. When duplicate orders started appearing during big drops, I traced it to a missing idempotency check and added one — duplicates went to zero."

Why it works: it proves real use of the company's product, shows a production problem solved, and the idempotency detail signals exactly the kind of thinking a payments team values.

Hook: "I'm applying for the Summer Analyst role in your Industrials coverage group after speaking with [Name], a [School] alum on the team, at our October finance club event."

Proof: "As portfolio lead for our student investment fund, I built the DCF and comps for our position in a mid-cap rail operator and presented it to a committee of 25 members. The pitch was approved, and I now track the position weekly against our thesis."

Why it works: banking letters are about fit and genuine interest. Naming an alum you actually spoke with (with their permission) is one of the strongest signals you can send. The proof shows modeling and communication — the two things analysts do all day.

Hook: "I'm applying for the Social Media Marketing internship because your 'build in public' posts on LinkedIn are the reason I first heard of your product — and the reason I signed up."

Proof: "This year I took over Instagram for our campus mental-health club. By switching from event flyers to short Reels featuring members, I grew the account from 600 to 2,100 followers in four months, and attendance at our weekly sessions roughly doubled."

Why it works: the numbers are small and believable, the cause-and-effect is clear, and the hook shows the candidate already understands the company's channel strategy.

• Repeating the resume. If a sentence could be a bullet point, it probably already is one. Use the letter for context and motivation.
• Generic praise. "Your company is an industry leader" could be sent to anyone. Name a product, project, team, or person.
• The wrong company name. Still the most common reason letters get tossed. Re-read before every send.
• Over a page. For an internship, 300 words is the ceiling.
• International students over-explaining visa status. The letter is not the place for a paragraph on CPT. If work authorization needs mentioning, one neutral line is enough — see our F-1 resume tips.
• A DOCX with tracked changes or comments. Always export to PDF and name it Firstname-Lastname-Cover-Letter-Company.pdf.

A great letter only works if the resume underneath it survives the first skim. If you have not rebuilt yours for this cycle, start with how to write a resume as a college student or grab the free college resume template. If you want a second set of eyes on both, our resume writing service covers the resume, LinkedIn, and application materials together.