How Long Should a Cover Letter Be? 250–400 Words, and Why the Number Matters Less Than You Think

The real answer, and who actually stands behind it

The one-page standard is not invented, but it comes from institutional style guidance rather than from an experiment. Purdue OWL, which is about as close to a neutral authority as business writing has, is unambiguous: "Keep it to one page." It specifies the structure too — "one introductory paragraph, one to three paragraphs to highlight your skills, and one concluding paragraph" — along with single spacing, left-aligned paragraphs, and standard one-inch margins, which can be tightened to roughly 0.7 inch if you keep them consistent on all sides. Yale's Office of Career Strategy gives the same instruction: limit your letter to one page. Note what these sources do and do not claim. They prescribe a format, based on what fits a page and what a reader will absorb. Neither claims that a particular word count produces more interviews, because neither ran that test. That is an honest position, and it is the one this page takes as well. Where does 250–400 words come from, then? Arithmetic. A single-spaced page in an 11-point standard font with one-inch margins and space between paragraphs holds roughly 400 to 500 words before it looks dense. Subtract your heading, greeting, and sign-off, and 250–400 is what remains for actual prose in three or four paragraphs. The range is a description of the container, not a discovery about recruiters.

What the research actually measured: tailoring, not length

The study behind the recycled statistics is a genuine field experiment, and it is worth knowing accurately because its real finding is more useful than the fake one. ResumeGo submitted 7,287 fictitious job applications to postings on ZipRecruiter, Glassdoor, and Indeed between July 15, 2019 and January 10, 2020, splitting them into three groups: applications with no cover letter, applications with a generic but well-written cover letter, and applications with a letter tailored to the specific posting. (ResumeGo) The callback rates came out like this: No cover letter — 10.7%. Generic cover letter — 12.5%. Tailored cover letter — 16.4%. That is the origin of the "53%" you see everywhere: a tailored letter produced roughly 53 percent more callbacks than sending no letter at all. It is a finding about customization. The study does not analyze word count, and its published methodology contains no length variable whatsoever. Two things follow. First, be skeptical of any page that attaches a precise percentage to a word count — including the ones ranking above this one. Nobody has run that experiment at scale and published it. Second, and more useful: the gap between a generic letter and a tailored one (12.5% to 16.4%) is larger than the gap between no letter and a generic one (10.7% to 12.5%). Writing something helps a little. Writing something specific to the job helps roughly twice as much. So if you have thirty minutes, spend five getting inside the range and twenty-five naming the actual company, the actual role, and the actual problem you would be hired to solve.

A word budget you can actually write to

Ranges are hard to write against. Paragraph budgets are easy. Draft to the allocations below and you will land inside 250–400 words without counting as you go. The second body paragraph is genuinely optional. Use it when the posting names two distinct requirement clusters — say, technical depth and stakeholder management — and you have real evidence for both. Skip it when you would be padding, and take the letter to 275 words instead of 375. Nobody has ever been rejected for concision.

16 examples across 4 groups

When shorter is right, and when longer is defensible

250–400 is the default, not a law. Four situations legitimately change it. The posting specifies a length. Follow it exactly. If it says 500 words, write up to 500 and let the letter run past a page. If it says "no more than half a page," write 200. An explicit instruction is also a test of whether you read the posting, and failing that test is a worse outcome than any word count. The letter is the body of an email. When there is no attachment and your text appears directly in an inbox, go shorter — roughly 150 to 250 words. Email is read on phones, and a screen and a half of unbroken text gets skimmed rather than read. Drop the formal heading block, open with a real greeting, and keep three tight paragraphs. Academic, federal, and some clinical applications. These follow different conventions entirely. Academic cover letters routinely run two pages and are expected to address research, teaching, and service separately; Purdue OWL treats them as a separate genre for exactly this reason. USAJOBS applications and many hospital systems have their own requirements. If you are applying into one of these, find the norm for that field rather than applying the business-letter default. Fifteen-plus years of directly relevant experience. You can justify 450–500 words and a full page. But be honest about whether the extra 100 words carry new evidence or just more of the same evidence. Seniority is a reason to be more selective, not less — a director-level letter that reads like a career summary suggests someone who cannot prioritize. What does not justify extra length: a career change, an employment gap, or a missing qualification. Those feel like they need explaining at length, and they do not. One clear sentence handles each, and a long defensive passage draws attention to exactly the thing you were trying to make unremarkable.

How to cut a 600-word letter down to 350

Most first drafts land between 550 and 700 words. Cutting to 350 is almost never about finding better phrasing — it is about deleting four specific things, in this order. 1. Delete the throat-clearing opening. "I am writing to express my strong interest in the Marketing Manager position advertised on your website. I believe my background makes me an excellent candidate for this role." That is 30 words conveying that you are applying for a job you are applying for. Open on the strongest fact instead. This alone usually saves 40 to 60 words. 2. Delete anything the resume already says. A cover letter that lists your job titles in order is a worse version of the document attached beneath it. The letter exists to connect two or three specific experiences to this specific posting. If a sentence would survive being pasted into a different application unchanged, it is not doing the letter's job. 3. Delete adjectives about yourself. "Passionate," "detail-oriented," "results-driven," "dynamic," "highly motivated," "team player." These are unverifiable claims that every applicant makes, and each one costs you words you could spend on a fact. "I reduced onboarding time from six weeks to three" demonstrates results-orientation without asking to be believed. 4. Delete the second example that proves the same point. Two stories about leadership are one story too many. Keep the one with the better number. After those four passes, read what remains and check that every paragraph still contains at least one thing that could only be true of you and this employer. If a paragraph has nothing specific left in it, cut the paragraph rather than trimming it — a generic paragraph at 60 words is no better than a generic paragraph at 90.

Formatting, so the page count matches the word count

A 350-word letter can still overflow a page if the formatting is wrong, and a 500-word letter can be squeezed onto one in a way that nobody wants to read. The mechanics matter as much as the count. Margins. One inch on all sides is standard. Purdue OWL allows going down to about 0.7 inch, provided you keep it consistent on every side. Below that you are visibly cheating, and the reader can tell. Spacing. Single-space the body, with a blank line between paragraphs. Do not use 1.5 or double spacing to fill a thin letter — it is transparent, and it turns 250 honest words into a page that looks padded. Font. Match your resume, 10 to 12 point, in something standard. There is no parsing advantage to a particular typeface here, and using the same font across both documents makes the pair look deliberate. Paragraphs. Left-aligned, not justified, and not indented. Justified text creates uneven word spacing that reads as amateur in a short document. Length on screen. Before sending, look at the letter as a PDF at 100 percent zoom, then look at it on a phone. Most letters are now first read on a phone, and a paragraph that looks like four lines on a laptop can be eleven lines on a handset. If any paragraph fills a phone screen on its own, split it. File. Send a text-selectable PDF unless the application asks for a Word document, and give it a real name — "Firstname-Lastname-Cover-Letter.pdf" rather than "cl-final-v2.pdf."

The length mistakes that actually cost interviews

Not every length problem is "too long." Four failure modes come up repeatedly, and only one of them is about exceeding a page. Too short to contain evidence. A 90-word letter that says you saw the posting, you are interested, and your resume is attached has spent the reader's attention without using it. If you have nothing to say beyond enthusiasm, the letter is doing nothing that an empty field would not do. Either write 250 words with a real example in them or make peace with sending no letter. Long because it is generic. This is the most common version. Generic letters run long precisely because nothing in them is specific enough to be decisive, so the writer keeps adding. If your draft is 700 words, the problem is usually not verbosity — it is that you have not identified what this employer needs, and length is the symptom. Long because it is defensive. Two paragraphs explaining a gap, a layoff, or a missing certification. The explanation is nearly always longer than the concern it addresses, and its length signals that you consider it serious. One sentence, stated plainly, then move to what you can do. Right length, wrong content. A perfectly formatted 340-word letter that restates your resume in prose is still a wasted page. This is where the tailoring finding matters: the measured difference between generic and specific was larger than the difference between having a letter and not having one. Word count is a constraint you satisfy. Specificity is the thing that does the work.