# Cover Letter vs Resume: What Each One Is Actually For URL: https://ohboiler.com/journal/cover-letter-vs-resume Type: blog Locale: en Published: 2026-11-11 Updated: 2026-11-12 --- > A resume is the record of what you did. A cover letter is the argument for why it fits this job. Here is what belongs in each and when to send both. A resume is a record of what you have done. A cover letter is an argument for why that record fits this particular job. That is the whole cover letter vs resume question in two sentences, and most of the confusion comes from people writing one document while thinking they are writing the other. I read around forty applications a week as an independent recruiter in Sheffield. The ones that stall at my desk almost always have the same flaw: the resume is trying to persuade, or the letter is trying to list. Each document has one job. Give it that job and both get shorter and better. ## What a resume proves and what a cover letter explains Think of the resume as evidence and the letter as the reading of that evidence. A resume answers: where have you worked, what did you own, what changed because of you. It is scannable by design. A recruiter spends seconds on a first pass, so the structure carries the weight: dates, titles, short bullets with a number or an outcome where one exists. A cover letter answers a different question: why this role, why this company, why now. It is the only place in an application where you can connect two facts that the resume keeps apart. "Managed a team of six" sits on the resume. "I have run a small team through a platform migration, which is the situation your product lead described in the job post" belongs in the letter. - **Job.** The resume proves you can do the work. The letter explains why you want this work. - **Format.** The resume is structured and scannable. The letter is short prose in three or four paragraphs. - **Length.** One to two pages for the resume, under one page for the letter. - **Changes per application.** A few bullets on the resume, most of the letter. - **Read by.** Recruiters and ATS software for the resume, hiring managers (sometimes) for the letter. If you can swap the company name in your letter and it still reads fine, it is not a cover letter yet. It is a second resume in sentences. ![Person holding a blank sheet of paper and a pen at a desk](https://fdzlnqpwsaniezitwiuw.supabase.co/storage/v1/object/public/cms-media/ohboiler/2026-11/3bdc0e-i1.webp) ## Does anyone actually read the cover letter? It depends on who you ask, and the surveys disagree loudly. A [ResumeGo study of 236 recruiters and hiring managers](https://www.resumego.net/research/cover-letters/) found that 87 percent read cover letters. The same research, run as a field experiment, found that tailored letters produced a callback rate 53 percent higher than applications with no letter. Other surveys land far lower. A 2024 ResumeBuilder poll of 948 US hiring managers reported that 44 percent never read them. Treat every figure here with some suspicion, since many come from resume-service companies that sell letters. My own experience sits in the middle. In the first pass, I do not read the letter. I read it when the resume is close and I need a reason to say yes, or when something looks odd, such as a career change or a gap. At that point the letter becomes the deciding page. That is the pattern I would plan around: the resume gets you considered, the letter decides the borderline cases. Borderline cases are most of the pile. ## When the cover letter is not optional Some situations make the letter close to mandatory, whatever the form says. - **The posting asks for one.** Obvious, and still skipped by more applicants than you would expect. - **You are changing field.** The resume will say you are a teacher applying to a product role. Only the letter can say why that makes sense. - **You have a gap or an unusual shape.** A short, plain sentence beats a recruiter inventing their own explanation. - **The role is small-company or writing-heavy.** A founder hiring their first marketer is reading the letter as a writing sample. - **You were referred.** Name the person in the first line. When none of these apply and the form marks the letter optional, you can skip it. Skipping is a decision, not an oversight. If you skip it, the resume has to do more work, and the top third of the page needs to carry the match to the role. ## What goes in the letter that is not on the resume The mistake I see most is the letter that narrates the resume in order. "I began my career at... I then moved to..." The reader already has that page open beside it. A useful letter has four parts, and it fits in about 250 words. - **A first sentence that names the role and one specific reason you are applying.** Not "I am writing to apply for." The subject line did that. - **One example that matches their stated need.** Pick the single most relevant thing you did and give it two or three sentences with a result. - **One sentence about why this company.** Specific, checkable, short. A product decision you noticed, a customer segment you know. - **A plain close.** Availability, and that you would be glad to talk. No flourish. Then stop. The letter that ends early reads as confident. Here is what the middle looks like in practice. Weak: "I have strong communication skills and a passion for customer success." Better: "Last spring I rewrote our onboarding emails after noticing that a third of new customers never opened the second one. Replies doubled within a month. Your posting mentions a lapsed-trial problem, which is the same shape." The second version gives the reader something to ask about in the interview, and that is its real purpose. Length matters less than people think, but tone matters a lot. Write as you would to a sharp colleague you have not met yet: direct, warm enough, no ceremony. If a sentence would sound strange read aloud, cut it. ![Laptop with an empty document next to an open notebook and coffee](https://fdzlnqpwsaniezitwiuw.supabase.co/storage/v1/object/public/cms-media/ohboiler/2026-11/cff68a-i2.webp) ## What the resume should stop trying to do Resumes get weighed down by persuasion they cannot deliver. The objective statement, the paragraph of adjectives, the line saying you are a results-driven team player: none of it persuades, and all of it takes space from the evidence. A short summary at the top is fine if it names your function, your years of experience and one or two specifics. "Product designer, seven years in B2B software, mostly onboarding flows" tells a reader what drawer to file you in. Anything beyond that belongs in the letter, where there is room to be specific. The other job a resume has is surviving software. Many employers run applications through an applicant tracking system before a person sees them. Keep the layout plain, use the job title wording that appears in the posting where it is true, and avoid putting key details in headers or text boxes where parsers can miss them. Tools such as Jobscan compare a resume or letter against a pasted job description and return a keyword match rate. That is a check on a draft you already wrote, not a writer. ## Tools that help with each document The resume is the easier document to build with software, because it is structured. The letter is harder, because it depends on judgement you have to supply. For the resume, builders with a scoring step are useful for catching weak bullets and formatting drift. Rezi rates a resume out of 100 on things like active verbs, quantification and filler. Treat that score as a reading of writing quality, not a prediction of any specific employer's system. For tracking which version went where, Teal combines a resume builder with an application tracker, which matters once you are sending fifteen versions of the same letter and cannot remember which was which. For the letter, Kickresume offers cover letter templates and an AI writer. This is where I would be careful. An AI draft fills the structure quickly, and that is useful. It also produces the most generic paragraph in the pile unless you replace the example and the company sentence with your own. Use the draft as scaffolding, then rewrite the two sentences only you can write. ![Stack of printed pages with a paperclip and pencil on a pale oak table](https://fdzlnqpwsaniezitwiuw.supabase.co/storage/v1/object/public/cms-media/ohboiler/2026-11/dd3da4-i3.webp) ## A reusable letter without the copy-paste disaster Writing a new letter from nothing for every application is what makes people give up on them. The sensible version is a fixed frame with three open slots. Keep constant: your opening structure, your close, your tone, and two or three stories you can pull from. Change every time: the role and reason in the first sentence, which story you choose, and the company sentence. At the second send, you stop rewriting. At the tenth, you start refining. The boilerplate disappears, and the personal part stays yours. The disasters I have seen all come from the same source: a slot nobody changed. The wrong company name in paragraph three. A reference to a product the employer discontinued. Read the final draft once with the posting open beside it, looking only for things that are left over from the last application. It takes two minutes and has saved me from more embarrassment than any grammar check. ## Should you send both? Send both when the role is competitive, when you have a story to explain, or when the posting asks. Send the resume alone when the form calls the letter optional, the role is high-volume, and your resume already makes the match obvious. Upload them as separate, clearly named files unless the system merges them into one. Name them with your surname and the document type. Nobody wants to open "final_v7.pdf". What each document gives the reader is different. The resume tells them you are qualified. The letter tells them you meant to apply here. Write each one for the reader it has, and the pair does the work that neither does alone. ## FAQ ### What is the main difference between a cover letter and a resume? A resume lists your experience, skills and results as evidence that you can do the job. A cover letter is a short piece of prose explaining why you want this specific role and how your experience fits it. ### Do I need a cover letter if I have a resume? Not always. If the posting asks for one, if you are changing field, or if you have a gap to explain, send one. If the form marks it optional and your resume already matches the role, you can skip it. ### How long should a cover letter be compared to a resume? A resume runs one to two pages. A cover letter should stay under one page, usually around 250 words in three or four short paragraphs. ### Should a cover letter repeat my resume? No. The reader has the resume open beside it. Use the letter for what the resume cannot say: why this company, one example that matches their stated need, and any context such as a career change. ### Can I use the same cover letter for every job? Reuse the frame, not the content. Keep your structure and tone, then change the first sentence, the example you choose and the company-specific line each time. ### Should I upload the cover letter and resume as one file or two? Two separate, clearly named files, unless the application system merges them into a single upload. Name them with your surname and the document type.