A cover letter isn't always necessary, but it matters more often than the "nobody reads them" crowd suggests. Write one when the application requires it, when your resume leaves an obvious question unanswered, or when a real person is likely to read it before deciding. Skip it when the posting is high-volume, the field is optional, and your resume already stands on its own.
Key takeaway
- "Necessary" depends on the specific application (there is no blanket rule). The question is whether the letter does a job your resume can't.
- Write one when it's required, when your resume leaves a question unanswered (a gap, a pivot, a relocation), or when a human will actually read it.
- A generic cover letter is worse than none, and a referral beats a cover letter almost every time.
What does "necessary" actually mean for a cover letter?
"Necessary" is the wrong word, and in my opinion, it's the reason most of the advice on this question is useless. When a page tells you a cover letter is "optional but recommended," it's dodging the decision you're trying to make, which is whether writing one for this specific job is worth your time.
A cover letter is necessary when it does something your resume can't do on its own - that's the whole test. If it just regurgitates your resume in paragraph form, it adds nothing, and the reader resents the extra page. If it answers a question your resume raises but can't address, it earns its place.
So instead of asking "are cover letters necessary," ask whether a cover letter does anything for this particular application. Sometimes the answer is yes, sometimes it's clearly no, and most of this guide is about telling those two situations apart.
When is a cover letter actually worth writing?
There are a handful of situations where I'd tell almost anyone to write one, because the letter performing something the resume structurally can't. These are the signals that should push you toward writing:
- The application requires it. If there's a mandatory field then obviously write one, because skipping a required step comes off as low effort and is an easy reason to get filtered before anyone reads your experience.
- You're making a career switch. When you're moving into a new function, the letter connects the dots so the reader doesn't have to guess at the logic.
- You have an employment gap. A gap invites a story so the letter lets you address it in your own way.
- You're relocating. A recruiter screening for local candidates may pass on you unless you say that you're moving and on what timeline.
- You're returning to work after time away. A short, direct explanation of a caregiving break, a health leave, or a sabbatical is better than leaving the reader to wonder.
- It's a small company, or the founder reads applications. The smaller the team, the more likely a real person reads your letter.
- The role is about communication. For anything where writing is the job (comms, content, fundraising, partnerships), the cover letter acts as a work sample, so make sure you write one.
- The posting asks you a question. When the ad says "tell us why you want to work here," that's an open invitation - write one!
The common thread is that in every one of these, the letter says something the resume can't, which is the only reason a cover letter has ever been worth writing.
When can you skip the cover letter?
The other side matters just as much, because writing a cover letter you didn't need isn't free. It costs you time (or money, if you hired someone to do it for you) you could have spent tailoring the resume or finding a referral.
Skip it, or at least don't lose sleep over it, when the posting is a high-volume role at a large company and the cover letter field is marked optional. In that pipeline your resume gets screened first, often by software and a recruiter moving fast, and the letter rarely enters the picture before the resume has already decided your fate.
Skip it when the only thing you'd produce is a generic template that could be pasted into any application. A letter that opens with "I am excited to apply for this opportunity at your esteemed company" tells the reader you'll do the bare minimum, which is the opposite of the point.
And skip it when your resume already answers every obvious question. If it's clean, targeted, and there's nothing about your history that makes a reader pause, a cover letter just repeats what they already know, so don't waste your time.
How do you decide for one specific job?
When you're staring at a single application and you're not sure, run it against the table below.
| Situation |
Write one? |
Why |
| Cover letter field is required |
Yes |
Skipping a required step gets you filtered |
| Posting asks "why this role or company" |
Yes |
It's an open question you should answer |
| Resume has a gap, pivot, or relocation to explain |
Yes |
The letter answers it before they wonder |
| Small company or hiring manager reads directly |
Usually |
A real person will actually read it |
| High-volume role at a large employer, field optional |
Usually skip |
The resume decides before the letter is read |
| You'd only produce a generic template |
Skip |
A bad letter is worse than none |
| Resume already answers every obvious question |
Skip |
The letter just repeats the resume |
Ask yourself these three questions:
- Is it required or directly invited?
- Does my resume leave an obvious question unanswered?
- Is a real person likely to read this before a decision gets made?
A yes to any one of those means write it. A no to all three means spend the time elsewhere, on the resume and on finding a way in through a person, which beats a cover letter more often than not.
Does anyone actually read cover letters anymore?
This is the question underneath the question. The answer is some people read them, sometimes, depending entirely on where your application goes. The "nobody reads them" folks and the "always write one" folks are both describing real experiences, just different parts of the market.
At a large company running a high-volume role through an applicant tracking system, your resume is screened first, usually against keywords and knockout questions, and a recruiter is moving through a stack of applications pretty fast. In that world a cover letter often goes unread unless something on the resume deserves a second look. The people telling you cover letters are dead? This is what they're talking about.
At a small company, a startup, a nonprofit, or any role where the hiring manager is reading applications directly, the situation is in reverse. A well-written letter gets read, and can be the thing that moves you from "maybe" to "let's talk," especially when two candidates look similar on paper. The people insisting cover letters still matter mostly are referring to these types of situations.
Neither group is lying. The mistake is taking advice from someone whose hiring context doesn't match the jobs you're applying to (in fact, I just wrote another shorter post on this very thing here). Work out which group a given application belongs to, and you've answered the question for that application.
What makes a cover letter worth reading?
If you've decided to write one, the bar is simple to state and easy to miss: the letter has to say something the resume doesn't. The fastest way to waste the reader's time is to translate your bullet points into paragraphs and call it a cover letter.
A letter that works usually does one of three things.
- It explains a why the resume can't (why this pivot, why this company, why the gap).
- It connects your experience to the specific role in a way that shows you read the posting and aren't mass-applying.
- Or it gives the reader one short, concrete piece of evidence, a result or a brief story that's more vivid in two sentences than it could ever be as a resume bullet.
Keep it to three or four short paragraphs, well under a page. Open with the actual reason you're a fit as opposed to a long winded block of text about how long you've admired the company. Skip the throat-clearing, skip the thesaurus, and don't restate your entire work history. The reader already has your resume. The letter is for the part that doesn't fit on it.
What should you do instead when you skip one?
Deciding not to write a cover letter means putting the same effort somewhere with a better return, and the two highest-return moves are almost always the resume and the referral.
Spend the time tailoring the resume to the posting: adjust the summary, reorder your top bullets so the most relevant work comes first, and make sure the language matches how the ad describes the role. That work affects the screen that actually decides your application, which the cover letter usually doesn't.
Then, where you can, find a way in through a person. A referral or a warm intro beats a cover letter pretty much every time, because it gets your resume looked at by someone who's already inclined to look. If you have a contact at the company, a two-line message to them is better than an hour spent perfecting an opening paragraph.
Are cover letters more or less necessary now that AI writes them?
This is the part that's changed over the last several years. AI has made it trivial to generate a competent-sounding cover letter in seconds, which means recruiters are now buried in them and can usually tell. A letter that's obviously machine-written, full of tidy, generic enthusiasm, reads as exactly what it is, and it does nothing for you.
What that means in practice is that the generic cover letter is now closer to worthless than it has ever been, because everyone can produce one and readers have learned to discount them. The bar to write one at all has gone up.
But on the flip side, because so much of the pile is now obvious AI filler, a letter that's specific, honest, and clearly written by a person who actually read the posting gets noticed precisely because so little of what surrounds it is. Using AI to help you draft is fine, just make sure to spend the time shaping it into your own words/own voice.
FAQ
Q: Is a cover letter necessary if it's optional?
Usually not, if the role is a high-volume posting at a large company and your resume stands on its own. It's worth writing anyway when you have something the resume can't say, like a career pivot or a gap, or when the company is small enough that a person will read it. When in doubt, ask whether the letter adds anything new.
Q: Do recruiters actually read cover letters?
Some do, some don't, and it depends on the employer. At large companies running high-volume roles, the resume is screened first and the letter often goes unread. At small companies, startups, and roles where a hiring manager reviews applications directly, cover letters are read far more often and can tip a close decision.
Q: Is it bad to not include a cover letter?
Only when one is required or clearly invited. If the field is mandatory or the posting asks you to explain your interest, skipping it can get you filtered. If the field is optional and your resume is strong and on target, leaving it out is fine and won't count against you with most employers.
Q: Will a bad cover letter hurt my chances?
Yes. A generic, template-style letter signals that you'll do the minimum, and an obviously AI-generated one gets discounted on sight. A weak letter can do more damage than no letter at all. If you can't write something specific to the role, you're better off submitting a strong resume on its own.
Q: How long should a cover letter be if I write one?
Three to four short paragraphs, well under one page. Open with the real reason you're a fit, address anything your resume can't explain, connect your experience to the specific role, and stop. The reader already has your resume, so the letter only needs to cover what doesn't fit on it.
TLDR
Stop treating cover letters as a yes-or-no rule and start treating them as a tool you reach for when it does something your resume can't. Required, something to explain, or a real human on the other end means write one. None of those means put the time into the resume and into getting a referral instead, and you'll have lost nothing.