Cover letters occupy a strange position: surveys consistently show a large share of recruiters do not read them, and the same surveys show a large share of hiring managers do. Both groups are telling the truth, because they are looking at different stages of the same process.
Who actually reads it
At the screening stage, a recruiter working through two hundred applications for a well-defined role is matching against requirements. The resume answers those questions faster, so the letter is often skipped. Later, when a hiring manager has six shortlisted candidates who all meet the bar, the letter is one of the few things that differentiates them — and at that point it gets read closely.
When a cover letter is worth the time
- Career change — the resume raises an obvious question and only the letter can answer it.
- An employment gap, relocation, or anything else that needs a sentence of context.
- Small companies and startups, where the hiring manager reads every application personally.
- Any posting that explicitly requests one. Not sending it is treated as not following instructions.
- Roles where writing is part of the job — marketing, communications, policy, law, teaching.
- A speculative or referral application, where there is no posting for the resume to answer.
When to skip it
High-volume applications through a job board with an optional upload field, or a technical role where the screen is a coding assessment, rarely justify a bespoke letter. If you are sending fifteen applications this week, ten strong resumes plus five real letters for the roles you actually want beats fifteen generic letters comfortably.
The structure that works
- Opening: the role, and the one specific reason you are writing — not "I am writing to apply for", which the subject line already said.
- Paragraph two: the single most relevant thing you have done, with its result. This is the paragraph that earns the interview.
- Paragraph three: why this employer specifically. One concrete detail about their product, market, or mission that you could not have written about a competitor.
- Close: a plain statement of availability and interest. No flourishes.
Three or four short paragraphs. Half a page. A full page of prose from a candidate the reader has not met is a burden, not a demonstration of effort.
What makes a letter fail
I am a hard-working team player with excellent communication skills who is passionate about your company's mission.
I spent the last two years rebuilding onboarding at a 40-person SaaS company, cutting time-to-first-value from 11 days to 3. Your careers page describes the same problem at ten times the scale.
The first sentence is true of everyone. The second could only have been written by one applicant for one job.
The other reliable failures: restating the resume in paragraph form, addressing it to the wrong company, and generic AI output that reads as fluent and says nothing. Recruiters recognise the last one immediately, and it is now a faster rejection than a mediocre human letter.