Do cover letters still matter? Mostly no, and then occasionally decisively

Two things are true at once, which is why the advice on this is so inconsistent.

The first: most cover letters are not read. Recruiters surveyed on this say so repeatedly, application systems frequently make the field optional, and in a pool of two hundred applicants for a mid-level role nobody is reading two hundred letters. Writing a fresh one for every application is close to the worst available use of job-search time.

The second: when a letter is read, it often decides the outcome, because by then the resumes have narrowed the field to people who are all plausible and the letter is the only thing that distinguishes them.

So the question is not whether cover letters matter. It is which applications are the ones where yours gets read.

The four situations where it is worth writing one

When something on your resume needs explaining. A career change, a significant gap, a relocation to a city you do not live in yet, a step down in seniority, an application to a role that does not obviously follow from your history. Your resume states facts and cannot supply reasons. A letter that supplies the reason in three sentences prevents a reader from inventing a worse one, and this is by far the highest-value case.

When the application is small. A twelve-person company, a specific team, a role you found through a person rather than a board. Here the letter will be read, probably by the person you would report to, and the ratio of effort to attention is completely different from a large posting.

When you are asked for one and told what to address. "Tell us about a project you are proud of" is not a formality, it is a screening question, and a generic letter in response is a clear signal. Postings that ask something specific are usually run by people who read the answers.

When you genuinely know something about the organisation. You have used the product and have an opinion. You know the market they are entering. You read the paper their research is based on. This is rare and it is the only version of enthusiasm that reads as real, because it contains information rather than adjectives.

Outside those four, skip it, or send three sentences. The time is better spent on the resume, on tailoring vocabulary to the posting, or on finding one person to talk to.

What a good one actually does

A cover letter is not a prose version of your resume. The reader has the resume. Restating it is the most common failure and the reason so many letters go unread — after two sentences the reader has established that there is nothing new here.

A letter should do one of three things:

Explain a fact the resume cannot. Why the change, why the gap, why this role.

Supply evidence the resume has no room for. One story, told properly, with what was difficult and what happened. Resume bullets are compressed to a line; a letter can afford a hundred words on the one project that best predicts your performance in this job.

Demonstrate that you understand their specific problem. Not that you admire the company. That you have understood something concrete about their situation and have a view on it.

One of the three, done well, in under 250 words.

Structure that works

Four paragraphs, and the first one is where most letters lose the reader.

Open with the substance, not the pleasantries. "I am writing to apply for the position of X, which I saw advertised on Y" tells the reader nothing they do not know and spends the only sentence you are guaranteed to have. Open with the reason you are worth reading: the fact that needs explaining, or the most relevant thing you have done.

I have spent four years as a paediatric nurse and the last eighteen months building the census-forecasting tool my unit now uses for staffing. That is why I am applying for a clinical data role rather than another nursing post.

Then the evidence. One thing, specifically. What the situation was, what you did, what happened. Include the part that was hard, because the difficulty is what makes it credible.

Then the connection to them. One or two sentences on why this organisation rather than any organisation. If you cannot write this honestly, leave it out entirely — an invented reason is worse than no reason, and readers in hiring positions have a well-calibrated ear for flattery.

Then close briefly. One sentence. No paragraph about how you look forward to the opportunity to discuss how your skills can add value to their dynamic team.

Length and format

Under 250 words. Under 200 is better. It fits comfortably on half a page and it will be read on a phone at least half the time.

Address a person if you can find one without guessing. "Dear Hiring Manager" is fine and vastly better than "Dear Sir or Madam". Do not use "To Whom It May Concern".

Match the file format to your resume — a PDF with a text layer — and name it the same way: Amara-Whitfield-Cover-Letter.pdf. If the application form provides a text box instead, paste it in plainly rather than attaching a file nobody asked for.

What not to include

Your entire employment history in prose. It is already attached.

Salary expectations, unless asked. If asked, give a range with a brief basis.

Apologies or hedging. "Although I do not have direct experience in…" invites the reader to agree with you. State what you do have and let them draw the comparison.

Anything you would be embarrassed to have quoted back to you. Letters get forwarded internally more often than people realise, sometimes with commentary.

The honest cost-benefit

If you have two hours for a job search this evening, here is roughly how the value distributes.

Twenty minutes making your resume specifically better — one vague bullet turned into a concrete one, the summary aimed at this role, the two hard terms from the posting present on the page. That is the highest return available.

Thirty minutes finding and contacting one person who works where you are applying. Second highest, and by a wide margin over anything else on this list.

The remaining time on a cover letter, if the application falls into one of the four situations above. If it does not, spend it on two more applications with tailored resumes.

That ordering is uncomfortable if you have been told that a personalised letter for every application is diligence. It is not diligence; it is volume applied to the lowest-yield activity available, and the applications where a letter would have mattered end up getting the same recycled paragraphs as the rest.

Related

• How to write a resume when you are changing careers
• Employment gaps on a resume
• How to read a job posting for keywords