Most cover letters are ignored — not because hiring managers hate reading them, but because most cover letters say nothing a resume doesn’t already say. The ones that get read do something different. Here’s how to write one that works.
When a cover letter actually matters
Cover letters matter most when: you’re applying to smaller companies where a human reads every application, you’re making a career change that requires explanation, you have a specific connection to the company or role worth mentioning, or the job posting explicitly requests one. For large companies using applicant tracking systems (ATS), cover letters are often screened before a human sees them — which makes formatting and keywords matter more than personality.
The opening — don’t waste it
The first sentence determines whether the rest gets read. “I am writing to express my interest in the Marketing Manager position at your company” wastes the reader’s time and every hiring manager has read it thousands of times. Lead instead with something specific: a result you achieved, a connection to the company’s work, or the most compelling reason you’re the right person for this role. “After spending three years building Acme Corp’s content program from 0 to 2M monthly readers, I’m drawn to this role because…” is the kind of opening that makes a reader continue.
What to cover in the body
Two to three focused paragraphs. First: why this specific role at this specific company — not generic enthusiasm, but specific reasons that show you understand what they’re doing and why you want to be part of it. Second: the two or three experiences or results that are most directly relevant to what this role needs. Third (optional): anything that doesn’t fit elsewhere — career transition context, a gap you want to address proactively, or a specific skill the job description emphasizes.
What to leave out
Don’t restate your resume line by line. Don’t list every job you’ve ever had. Don’t explain that you’re “a hard worker” or “passionate about [industry]” — show it through specifics. Don’t start every sentence with “I.” Don’t go over one page. Don’t use a generic template where only the company name changes — hiring managers recognize these immediately.
Format and length
Three to four paragraphs, under 400 words, in a clean professional format matching your resume’s typography. Address it to a specific person if you can find the hiring manager’s name — “Dear Hiring Manager” is fine if not. End with a clear, confident close: “I’d welcome the chance to discuss how my background in X aligns with what you’re building” — not “Thank you for your consideration of my application.”