Do cover letters still matter?

You have probably heard both pieces of advice, delivered with equal confidence. Nobody reads cover letters anymore, so skip them. And: always write one, it is your best chance to stand out. Both usually come from people who have actually hired. I think they are reports from different rooms.

Whether your letter gets read depends mostly on volume and on who is screening. A recruiter triaging hundreds of applications for a big-company posting is not reading hundreds of letters; the résumé decides, and the letter is dead weight either way. A founder hiring the fifth engineer at a twelve-person company often reads every word, because applications are scarce enough to afford the attention and the hire matters enough to want it. So the honest answer to the title is: sometimes. Which is not a satisfying answer, but it does tell you where to spend effort.

The letter earns its keep wherever your résumé needs an explanation the format cannot carry. A career change, where the connection between your last job and this one is obvious to you and invisible to a stranger. A gap you would rather frame yourself than leave to the reader's imagination. A résumé states facts; a letter can state what the facts mean for this particular role. If your record speaks plainly for itself and the company is large, skipping the letter costs you little. If either of those is false, the letter may be the only place your actual case gets made.

I have some standing on the failure mode, because jobhunt.coach writes cover letters and I run evaluations on the models that write them. The characteristic failure of an AI-written letter is not a wild lie. It is confident filler with a subtle overclaim folded inside. In one eval gate this July, we were testing whether a cheaper candidate model could take over cover letters. It compiled every document, scored well on grounding, and would have passed, except that one letter described the candidate as "stronger in Python than Go" on a profile that contained no Go at all. Read fast, that is a compliment about Python. Read slowly, it quietly asserts Go experience nobody has. A hiring manager who knows Go and asks about it in the interview finds out the letter was decorating.

That single flag blocked an otherwise-passing model change. We added an explicit rule against comparatives that imply experience the profile does not hold, re-ran the gate, and it came back clean. I mention the mechanics because human writers reach for the same move, usually without noticing: a flattering comparison that smuggles in a qualification, a "deep familiarity" that is really two tutorials. The letter is the easiest place in the whole application to overclaim, because it is prose, and prose does not have date columns.

The instructions that govern our generated letters now read like a contract against filler, and I think they are decent advice for a human writing one by hand. Use only facts from your own record. Three or four short paragraphs, under about 280 words, plain first-person voice, no clichés. Open with the role and your strongest qualifications relevant to the posting. Give concrete proof points tied to what the job actually asks for. Close briefly. And keep meta-commentary out of the letter entirely: no disclaimers, no paragraph about what you are not claiming. In our product those caveats belong in the chat with Coach, jobhunt.coach's assistant, where you can decide what to do about them. In a hand-written search they belong in your own notes. The letter is the case for you, made only from true material.

Under 280 words surprises people. It is short on purpose. A letter that restates the résumé at full length gives the reader homework. Make two specific, supportable points instead, and cut every sentence that says nothing; the average of what remains goes up.

The limits are real. A letter cannot rescue a wrong-fit application, and no phrasing rule makes a missing qualification appear. For plenty of applications, nobody will open the file at all, and you will never know which ones. That is a real cost, and it is why I would not write a bespoke letter for a posting I barely qualify for at a company drowning in applicants.

But when the situation calls for one, the rule is simple: short, specific, and only things the record supports. Worst case, nobody reads it and you are out fifteen minutes spent saying true things about your own work. As job-search habits go, there are worse ones to practice.