Most cover letters get about eight seconds. The recruiter opens the PDF, scans the first paragraph, decides whether to keep reading, and moves on. If your letter sounds like every other letter in the pile, it ends there. The goal of this guide is simple: write something a tired person on a Tuesday afternoon will actually finish.
Why most cover letters get skimmed
The usual cover letter opens with a sentence like "I am writing to apply for the position of..." That sentence tells the reader nothing they don't already know. They have your CV, they have the job title in the email subject, and they have hundreds of other letters that open the same way. So they skim.
The letters that get read do one thing differently in the first three lines: they show that the applicant understood the job, not just the job title. That can be a specific problem the team is solving, a product they ship, a metric in the job ad, anything that proves you didn't paste the same letter into 40 applications.
If you want to dig into this single pattern, I wrote about it separately in how to write a cover letter that gets read, not skimmed.
The structure that works
A cover letter is a one-page document with four parts: a header, an opening, a short body, a closing. That's it. No table of contents, no headings, no clever formatting. Recruiters expect a specific shape, and giving them that shape is part of the job.
The header has your name, contact info, the date, and the company's address block if you have it. The opening hooks the reader in two to three sentences. The body is two paragraphs, sometimes three, that connect what you've done to what the role needs. The closing is two or three lines that propose a next step.
If any of those parts run long, the letter starts to feel like an essay, and the recruiter goes back to the CV. A clean walkthrough of this shape is in cover letter format: the structure that gets you read.
The opening line
The opening is the only part most recruiters actually read in full. Spend more time here than anywhere else.
A strong opening usually does one of three things. It references something specific about the company that a generic applicant wouldn't know. It states a single concrete result from your past work that maps to the role. Or it names the person who referred you, in the first half of the first sentence, before the reader can lose interest.
What to avoid: "I am excited to apply for...", "I came across your job posting on LinkedIn...", "With X years of experience in...". Those openings tell the reader you've sent the same letter to ten other companies, which is fine, but you don't have to advertise it. More examples in cover letter opening lines that actually work.
The body
The body is where most letters fall apart. People treat it as a prose version of the CV and lose the reader by the second paragraph. Don't repeat the CV. Pick two or three things from the job ad that matter most, and show one concrete piece of evidence for each.
One pattern that works well: in the first body paragraph, take the most important requirement in the ad and tell a short story about a time you delivered exactly that. Numbers help. "Cut onboarding time from 12 days to 4" lands harder than "improved onboarding processes." In the second body paragraph, do the same with the second most important requirement, or with a quality that's harder to read from a CV (team-building, communication, ownership).
If you want a deeper walkthrough with examples, the full body recipe is in cover letter middle paragraphs: how to structure the body that actually sells you.
The closing
The closing is short. Two to three sentences. It does three things: it points to the next step, it makes you easy to contact, and it sounds like a human wrote it.
Avoid closings that beg ("I would be deeply grateful for the chance...") and closings that demand ("I look forward to hearing from you about scheduling an interview."). The right tone is the one you'd use to end an email to a colleague you respect but don't know well: confident, brief, slightly warm. See cover letter closing lines: how to end without sounding desperate for phrasings that work in different industries.
Addressing the right person
If the job ad gives you a name, use it. "Dear Sarah Chen," is better than "Dear Hiring Manager," every single time.
If the ad hides the name on purpose, don't waste a paragraph apologizing for not knowing it. Use the team or department: "Dear Engineering Hiring Team," or "Dear Product team at Acme,". The worst options are "To Whom It May Concern" and "Dear Sir or Madam," both of which read as 1995. Two posts go deeper here: how to address a cover letter and the specific case of a cover letter without a contact name.
File format and length
Send it as a PDF, named with your full name and the role. Something like Maya-Lopez-Cover-Letter-Backend-Engineer.pdf. Don't send a .docx unless the ad asks for it, because formatting breaks across versions of Word.
Length is where almost everyone overshoots. A cover letter should fit on one page, in a normal font size, with normal margins. That works out to about 250 to 400 words. If you're hitting 500, you've turned it into a CV in paragraph form. I broke down the math in how long should a cover letter be.
A cover letter sits next to your CV, not in front of it. If your CV is weak, fixing the cover letter won't save the application. Start with the resume itself, using the full CV writing pillar guide, then come back here for the letter that frames it.
Common mistakes
The ones I see most often:
The applicant rewrites the CV in paragraph form. The recruiter already has the CV. Use the letter for context the CV can't carry: why this company, why this role now, what you'll bring that isn't on the page.
The applicant talks about themselves for four paragraphs and the company for one sentence. Flip the ratio. At least a third of the letter should be about the company, the team, or the problem they're hiring you to solve.
The applicant uses the same letter for every application, with the company name swapped in. ATS systems and human readers both notice. You don't have to rewrite from scratch every time, but the first paragraph and at least one specific example should be unique to the company.
The applicant sends it with a typo in the hiring manager's name. Read the letter out loud once before you send it. That catches more than spellcheck does.
Where to start today
Open the job ad. Pick the two requirements that matter most. Write the opening line first, in plain language, no warm-up. Then draft the two body paragraphs around those two requirements, with one concrete example each. Write a short closing. Read the whole thing out loud. Cut anything that sounds like a template.
If you'd rather not start from a blank page, Postulit generates a tailored cover letter from your LinkedIn profile and a job ad in one click, then lets you edit before exporting. Either way, the principle is the same: every cover letter is a short, specific argument for one job. Treat it like that and it gets read.