Cover Letter vs Resume: What Each One Is Actually For
A resume is a record; a cover letter is an argument. What only each one can do, the mistake that makes letters useless, and how to write both without repeating yourself.
The short version
- A resume is a record. A cover letter is an argument.
- The resume says what you have done; the letter says why it matters for this job, at this employer.
- They are separate documents, sent together, and the letter should never repeat the resume.
- If you are only going to write one well, write the resume — but a good letter is where a borderline application becomes a shortlisted one.
People often treat the cover letter as a formality: a paragraph explaining that they are applying for the role advertised, followed by a summary of the resume attached below. That version is genuinely useless, which is why so many candidates conclude that cover letters do not matter.
The two documents do different jobs. Once that is clear, writing both becomes much easier, because you stop trying to make one of them do the other’s work.
The difference in one table
| Resume | Cover letter | |
|---|---|---|
| What it is | A structured record of your work | A short argument addressed to a person |
| Form | Headings, bullet points, dates | Three or four paragraphs of prose |
| Voice | No pronouns, compressed | First person, written to somebody |
| Length | One or two pages | Half a page to three-quarters |
| Changes per application | Summary line and a few bullets | Almost all of it |
| Answers | What have you done? | Why you, why this job, why now? |
| Read by | Parsed first, then skimmed | Read by a person, if at all |
What only a resume can do
Scale and sequence. A resume shows ten years of progression in a shape a reader can take in at a glance: which employers, in what order, for how long, doing what. No letter can carry that, and no reader wants it in prose.
It is also the document that gets parsed into a database, which means it is the one that determines whether you can be found later. What an ATS resume is covers that side.
What only a cover letter can do
Three things, and they are all about connection rather than record.
It explains a gap between what you have done and what they need. A resume cannot say “my title was operations coordinator but two-thirds of the role was supplier negotiation, which is what your advert is about”. A letter can, in one sentence.
It accounts for something a reader will wonder about. A career change, a two-year break, a relocation, a step sideways in seniority, a short tenure. Named calmly in a letter, these stop being questions. Left to the resume alone, the reader supplies their own explanation.
It shows that you know who you are writing to. One specific, accurate observation about the organisation — the service they just launched, the site they just opened, the problem their sector is having — separates you from every applicant who sent the same letter to forty employers.
The mistake that makes letters useless
Summarising the resume in paragraph form. If the letter says “I have eight years of experience in retail management, including four as a store manager, where I was responsible for a team of twelve”, and the resume says the same thing in bullet form, the reader has now read it twice and learned nothing the second time.
I have eight years of experience in retail management and a proven track record of exceeding sales targets, as detailed in my attached CV.
Your advert asks for someone who can steady a store after a difficult year. That is the job I did at Marden in 2023: staff turnover was running at 60 per cent when I arrived and 18 per cent when I left, mostly through fixing the rota and the induction rather than anything clever.
Do employers still read cover letters?
Unevenly, and it depends on who is reading. A recruiter screening 300 applications for a high-volume role may not open it. A hiring manager choosing between six shortlisted candidates usually does, and at that point it is one of the few things distinguishing people whose resumes all look similar.
The practical rule: write one whenever the application allows it, keep it short, and make it specific. Where an application form offers “additional information” instead of a letter attachment, put the same content there.
When you genuinely do not need one
- The advert says not to send one.
- The application is a structured form with supporting-statement questions, which serve the same purpose at greater length.
- You are applying through a recruiter who will write their own submission — though sending them your version helps.
- It is a quick-apply listing with a single upload field and no message box.
Outside those cases, the absence of a letter is a small negative. It costs fifteen minutes.
How to write both without doing the work twice
- Finish the resume first. It is the harder document and it generates the raw material.
- Read the advert and pick the one requirement that matters most. That is your letter’s subject.
- Find the single best piece of evidence you have for it — ideally something the resume mentions but cannot explain.
- Write four paragraphs: why this job, the evidence, anything that needs accounting for, and a close.
- Delete every sentence that also appears on the resume.
Writing a cover letter takes that structure apart paragraph by paragraph, and how to start one deals with the opening line, which is where most people stall.
Formatting and sending
Same typeface and same header as the resume, so the pair looks like one application. Separate file, named clearly. Send both as DOCX or both as PDF, matching whatever the advert asks for.
If you are applying by email, put a short version of the letter in the body of the email as well as attaching it — many readers never open the attachment.
Every template on this site includes a matching cover letter document set in the same type as the resume, so the two arrive looking like a pair. See what is included, or browse by job title — marketing manager, receptionist, electrician and 495 more.
Common questions
Should a cover letter repeat what is on my resume?
No. It should explain, connect or account for things the resume can only list. If a sentence appears in both documents, cut it from the letter.
Is a cover letter still necessary?
Not always read, but rarely wasted. Send one whenever the application allows it: it costs fifteen minutes and it is often what separates similar-looking shortlisted candidates.
Which should I write first?
The resume. It is the harder document, it gets parsed, and writing it gives you the material and the wording the letter will draw on.
Do cover letters go through an ATS?
They are usually stored and sometimes searched, but the resume is the document that gets parsed into structured fields. Write the letter for the person, not the parser.
Can I use the same cover letter for several jobs?
The structure, yes. The content, no. A letter that could go to any employer says nothing, and readers recognise the shape of a template immediately.
Start from a file that already does this
Every template is written for one job title, in a single column, with no tables and no text boxes, and the bullet points are already drafted at 1, 2, 5 and 10+ years. Edit it in Word, Google Docs or Pages.
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