What Is a Cover Letter? Definition, Content, and How to Write One
Few documents in a job search spark as much confusion as the cover letter, but it is actually a short, persuasive argument tailored to one role that can boost interview callback rates by 40%. This guide walks through what to include, how to structure it, and the mistakes that can sink an otherwise strong application.
Average length: 200–400 words (3–5 paragraphs) ·
Common structure: Opening, motivation, skills, closing ·
Recruiter preference: 80% of hiring managers read cover letters ·
Impact on interviews: Cover letters can increase callback rate by 40%
Quick snapshot
- A cover letter is one page and complements, not replaces, your CV (University of Wisconsin‑Madison Writing Center)
- Tailoring the letter to each job is essential (MIT CAPD)
- Whether cover letters are always required – varies by industry and employer (UCF Academic Success Coaching)
- Optimal length preferences differ among recruiters (UCF Academic Success Coaching)
- Send with your application before the deadline – don’t wait for a request (Indeed.com)
- After writing, proofread, ask someone to review, then attach it to your application alongside your CV (University of Arizona Center for Career Readiness)
These core facts about cover letters are supported by career services from top universities.
| Feature | Details |
|---|---|
| Definition | A one‑page document accompanying a CV, used to explain why you are a strong candidate. |
| Purpose | To persuade the employer to read your CV and invite you for an interview. |
| Length | 200–400 words, typically 3–5 paragraphs. |
| Format | Business letter format, single‑spaced, with clear sections. |
| Common sections | Contact info, date, salutation, opening, body (2–3 paragraphs), closing, signature. |
What is a cover letter for a job?
Purpose of a cover letter
- A cover letter introduces you to a potential employer and highlights your qualifications (MIT CAPD).
- It’s a persuasive essay that adds nuance to your CV by focusing on 1–2 key achievements (McGill University Careers4Engineers).
When to send a cover letter
- Always submit a cover letter when a job posting requests one; even if not required, it strengthens your application (UCF Academic Success Coaching).
- Research suggests that 80% of hiring managers read cover letters, making them a valuable opportunity to stand out.
Difference between a cover letter and a CV
A CV lists your experience and education factually; a cover letter weaves a narrative argument about your fit. They are complementary – the cover letter should never repeat your CV verbatim (University of Arizona Center for Career Readiness).
The implication: mastering the cover letter gives job seekers a distinct advantage in the hiring process.
What do you write on a cover letter?
Opening paragraph
- State the specific job title and organisation in the first sentence (University of Arizona Center for Career Readiness).
- Briefly introduce yourself and explain why you are writing (MIT CAPD).
Body paragraphs (skills and achievements)
- Provide 1–2 concrete examples using the challenge‑action‑outcome format (Penn Career Services).
- Use keywords from the job description to show alignment (Indeed.com).
- Quantify achievements where possible (e.g., “increased sales by 20%”).
Closing paragraph
- Restate your interest, highlight fit, and thank the reader (MIT CAPD).
- Include a call to action – e.g., “I look forward to discussing my application at an interview.”
Employers scan cover letters quickly. Leading with a compelling, specific opening – not a generic “Hi, my name is…” – can determine whether your letter gets read through to the end.
The pattern: each paragraph serves a specific persuasive function, and missing any weakens the overall impression.
How to write a cover letter?
- Research the company and role – Understand the employer’s mission, recent projects, and the challenges the role addresses (MIT CAPD).
- Outline your key selling points – Identify 2–3 skills or experiences that directly match the job description (University of Wisconsin‑Madison Writing Center).
- Write a draft using the STAR method – Describe a Situation, Task, Action, and Result – a structure favoured by hiring managers (Indeed.com).
- Edit and proofread – Keep the letter to one page, no longer than five paragraphs. Check for spelling errors; ask a friend or career advisor to review.
- Common mistakes to avoid – Generic opening lines, repeating your CV verbatim, being too long or too short. Aim for 200–400 words.
A cover letter that simply paraphrases your CV doesn’t give recruiters a reason to interview you. The most common mistake is failing to tailor the letter to the specific job and company.
The takeaway: a methodical approach to tailoring each section yields a cover letter that stands out.
Is a cover letter the same as a CV?
Comparing the roles of a CV and a cover letter reveals their complementary nature.
| Aspect | CV | Cover Letter |
|---|---|---|
| Purpose | Provides a comprehensive, factual record of your professional history | Argues why you are the best fit for a specific role |
| Length | 1–2 pages (or longer for academic CVs) | 1 page, 200–400 words |
| Content | List of jobs, education, skills, and certifications | Narrative with examples, motivation, and call to action |
The implication: you need both. Sending only a CV leaves the employer guessing why you applied; a cover letter supplies your motivation and differentiates you from other candidates.
What 5 things should a cover letter include?
- 1. Your contact information – name, address, phone number, email at the top (McGill University Careers4Engineers).
- 2. Date and employer details – hiring manager’s name, title, company, and address.
- 3. Salutation and opening line – address a specific person; avoid “To Whom It May Concern” (Harvard Business Review).
- 4. Body with achievements (quantified) – 2–3 examples that show impact, using numbers when possible (Indeed.com).
- 5. Closing and signature – restate interest, request an interview, and thank the reader (MIT CAPD).
What this means: every one of these elements works together to move the reader from “maybe” to “let’s talk.” Missing any of them weakens the overall impression.
Upsides
- Allows you to explain career changes or gaps in a positive light
- Demonstrates writing and communication skills before the interview
- Shows genuine interest in the company by referencing specific projects or values
Downsides
- Time-consuming to tailor for every application
- Risk of sounding generic if not customised
- Some automated systems don’t parse cover letters, so key info should still be in your CV
Clarity check: what we know and what’s still debatable
Confirmed facts
- A cover letter should be tailored to each job application (University of Wisconsin‑Madison Writing Center).
- A cover letter is not a substitute for a CV.
- Cover letters typically follow a standard business letter format (Indeed.com).
- Common mistakes include being generic and too long.
What’s unclear
- Whether cover letters are always required (varies by industry and employer).
- Optimal length – some recruiters prefer very short letters (150–200 words) while others expect 300–400.
- Whether to use a template or write from scratch each time – both approaches can work if properly tailored.
- Whether the cover letter should be attached as a PDF or included in the email body (varies by company expectation).
What this means: job seekers should weigh these uncertainties when deciding how much time to invest in cover letters.
Job seekers who write a unique cover letter for every role increase their callback chances by up to 40%, but investing that time across dozens of applications is impractical. Focus on roles you genuinely want, and prioritise quality over quantity.
What career experts and professionals say
“A cover letter is a marketing tool. Treat it like one and you’ll see it do wonders.”
– Reddit user (r/datascience), sharing peer advice
“State why you are interested in this work and this organisation. Briefly mention your academic background, relevant qualification(s).”
– University College Cork Career Service, guidance on content
“Show don’t tell – use specific anecdotes with drama and resolution to illustrate your skills.”
– Penn Career Services, cover letter writing guide
Writing a cover letter that stands out isn’t about fancy templates or packing in every accomplishment. It’s about picking one or two stories that prove you can solve the employer’s problem. The best letters leave a reader thinking, “We need to meet this person.”
For more on professional letter writing, see our guide on How to Write a Letter of Recommendation.
Frequently asked questions
Should I write a cover letter in the email body or attach it as a separate document?
Unless the job posting specifies otherwise, attach your cover letter as a PDF along with your CV. This preserves formatting and ensures the content remains consistent. Some employers prefer it in the email body when using online forms, so always check instructions.
Can I use the same cover letter for multiple job applications?
You can reuse a basic structure, but each letter should be tailored to the specific role and company. Sending a generic letter reduces the chances of standing out – hiring managers notice when the letter wasn’t written for them.
What font should I use for a cover letter?
Use a professional, readable font such as Arial, Calibri, or Times New Roman in 10–12 pt size. Consistency with your CV font is recommended for a polished look.
How do I address a cover letter if I don’t know the hiring manager’s name?
Use a specific but inclusive salutation, such as “Dear Hiring Manager,” “Dear [Department] Team,” or “Dear [Company Name] Recruiter.” Avoid “To Whom It May Concern” if possible; a quick LinkedIn search can often find the name.
Is it necessary to include references in a cover letter?
No. Do not list references in the cover letter. Instead, prepare a separate reference sheet and bring it to the interview, or include it only when explicitly requested.
How do I handle gaps in employment in a cover letter?
Briefly address the gap in a positive way – for example, “During my time away from the workforce, I volunteered with [organisation] and strengthened my [skills].” Keep it short and focus on what you gained, not why you left.
What is the best way to close a cover letter when I don’t have the contact info?
Close with a polite call to action, such as “I look forward to hearing from you about this opportunity. Thank you for your time and consideration.” Sign off with “Sincerely” followed by your full name.
If you’re exploring career development, you might also be interested in What Is a Life Coach?
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