A cover letter is a one-page argument, not a second resume. It has to say why this role, at this company, with proof a bullet list can't carry.
Most U.S. applications still pass through an applicant tracking system before a recruiter opens anything, including company career sites and many job boards. Keep the file boring on purpose.
If the posting marks the letter optional, should you skip it? Skip it only when you have nothing extra to say: no referral, no career switch to explain, no reason this team is the one you want.
Thing is, a generic letter is worse than none. Recruiters notice the wrong company name. They notice a paragraph that could fit any employer in the country.
What the letter should actually do
Your resume lists where you worked. The letter picks one or two problems from the posting and shows you have already solved something close.
Don't retell every job. Don't paste duties from the ad. Don't claim a skill you can't point to in a project, class, internship, or role.
Built In's cover letter advice is blunt in a useful way: swap traits for results. "I partnered with product, engineering, and customer success to redesign onboarding, which reduced implementation time by 30 percent" beats "I'm a strong team player." Jobscan makes the same bet, asking you to put a situation, an action, and a result in the body so the reader can see how you think.
Build the letter in five parts
Stay on one page. UT Dallas career services still wants letter-size paper, 10.5-12pt type, and margins between 0.5 and 1 inch. Editorial walkthroughs such as Resume Genius commonly land around 250-400 words.
Use this order every time.
- Header with your name, phone, email, city and state, plus LinkedIn or a portfolio link. Add the date. Add the employer name, title if you have it, company, and city.
- Greeting. "Dear [Full Name]," if you found a person. First names are fine when that's how they publish it.
- Opening of two to four sentences. Name the job. Lead with one result. Say why this company, with a detail you didn't invent.
- Two short body paragraphs. First paragraph: one achievement mapped to a requirement. Second: a second proof point, or a genuine note on the product, mission, or team.
- Closing. Thank them. Ask for a conversation. Sign with Sincerely or Best regards and your full name.
If you're sending email, UNC's Career Center says to put the letter in the message body and attach the resume unless the instructions say otherwise.
Opening lines that don't waste the skim
The first sentence has to earn the second.
Weak: "I am writing to apply for the software engineer position at your company."
Stronger: "I cut production incident volume by 40 percent on a 12-service platform, and I'm applying for Software Engineer because your posting calls out the same reliability work."
A clever line can work in a design studio. It falls flat in a hospital, a bank, or a government portal. Mirror the tone of the company's own careers page, then get back to evidence.
Stay under four lines in the opener. Park the second win in the body.
Match the job description without copying it
Open the posting. Mark the verbs and nouns that repeat. Those repeats are the employer's real filters.
Pick three requirements you can support. For each one, write the requirement in your own words, then the fact from your resume, then one connecting sentence. Stop there. Three tight connections beat a keyword dump.
Turns out the letters that fail fastest are the ones that borrow the ad's adjectives and never show a result. "Passionate self-starter with a proven track record" is empty. "Shipped a Python script that reconciled 4,000 weekly invoices" is not.
When you're applying to a pile of roles in the same week it's easy to swap the company name and hit submit, and a surprising number of letters still praise a product the new employer doesn't even sell, which is a fast way to lose the skim.
Reuse a private bank of achievement paragraphs. Change only the company-specific lines. Keep the facts identical to your resume so a recruiter can check them. Don't invent a metric. Don't let a writing tool invent one either.
Keep the file simple for ATS and for people
Parsers read text in the order it sits in the file. They do not follow your eyes around a designed page.
| Keep | Skip |
|---|---|
| Arial, Calibri, or Times | Text boxes, icons, and multi-column layouts |
| .docx or a text-based PDF | A letter saved as an image |
| Keywords inside normal sentences | The same phrase pasted in a block |
| One column, left aligned | Tables that shuffle the reading order |
Follow the portal. If it asks for PDF, send PDF. If it asks for Word, send Word.
Write the letter for the person who might open it. Format it so software doesn't turn your name into garbage.
When you can't find a hiring manager's name
Skip "To Whom It May Concern." UNC's Career Center recommends "Dear Human Resources Director" or "Dear Hiring Manager" when a name isn't listed, and "Dear [Department] Team" works if that's all you can verify.
Put real numbers on the work
Duties don't persuade. Results do.
"Managed a support queue" is a task. "Cleared a 120-ticket backlog in six weeks while keeping first response under one business day" is a result.
No clean percentage? Use scope. Team of eight. $40,000 budget. Three store locations. A 30-person lecture. Recruiters can test those.
To be honest, a small true figure beats a polished number you couldn't defend in an interview. If a tool rewrites "helped with onboarding" into "reduced churn 45 percent," delete it.
Entry-level, career-change, and remote letters
You don't need a decade of titles. You need proof you already practiced the work.
Coursera tells early-career applicants to connect classes, projects, volunteering, or campus jobs to the posting and to pick one or two examples, not ten. A career switch needs one honest thread, then evidence: classroom management that looks like stakeholder communication, or retail rush hours that look like operations. Remote postings still want delivery, not a speech about flexibility. Name the tools you used and the work you finished without someone at the next desk.
For thin experience, these sources of proof travel well:
- A class project with a measurable output (users, pages, dollars, error rate)
- Volunteer or campus work with a real audience
- A personal build you can link, if the role is technical or creative
Close with a clear ask
Don't trail off.
"Thank you for reviewing my application. I'd welcome a conversation about how the intake-time work I did at County Clinic could help Brightpath's new-patient goal. I'm at 555-0100 or [email protected]."
Then a sign-off. Sincerely. Best regards. Kind regards. Full name under it.
Don't promise a follow-up you won't make.
A short sample you can steal the shape from
Here's a compact operations example. Change the facts. Don't copy the story if it isn't yours.
Dear Jordan Hale,
I'm applying for the operations analyst opening at Brightpath Health. At County Clinic I rebuilt the front-desk intake sheet used by nine staff, and average check-in dropped from 11 minutes to 7.
Your posting asks for someone who can clean messy spreadsheets and train non-technical users. I documented the new sheet, ran two 20-minute walkthroughs, and the desk team stopped keeping a side log in a notebook. I'm drawn to Brightpath because you're opening two neighborhood clinics this year and will hit the same intake bottleneck we had.
I would like to talk about how that work could transfer. You can reach me at 555-0100 or [email protected].
Best regards, Alex Romero
That's the shape: role, result, match, company detail, ask. A marketing letter might lead with campaign lift instead of check-in time. A software letter might lead with incident volume. The skeleton stays the same.
Common ways a letter fails
Check these before you upload.
- Same letter, every portal, every company
- Resume bullets copied with no extra story
- Wrong company left in after a find-and-replace miss
- More than one page, or paragraphs longer than four lines
- Keyword stuffing no person would say out loud
Read it aloud. Fix the clunky sentence. Then submit through the same portal as your resume.
FAQ
How long should a cover letter be? One page. Many editors land between 250 and 400 words. If you need 600, you're repeating the resume.
What if I don't have a name? Use "Dear Hiring Manager" or "Dear Human Resources Director." Don't stall the deadline hunting for a first name.
Can I write one with no full-time job yet? Yes. Use projects, classes, volunteering, and campus work. Quantify what you can.
Do ATS systems read cover letters? Some store them and some barely show them. Format the file simply either way, and write for the recruiter who might open it.
Pull one live posting tonight. Highlight three requirements. Write only those three connections, then stop. If a sentence could fit any company, cut it.