A cover letter gives you something a resume cannot: room to explain. Your resume lists what you have done. Your letter tells the reader why it matters for this particular job, why you want it, and what you would bring to the team.
Not every employer asks for one, and some recruiters skip them. But when a letter is requested, or when your application needs context such as a career change, a relocation or a gap, a well-written letter can turn a maybe into an interview. This guide walks through the structure, tone and details that make a letter work.
What a cover letter is for
A good cover letter does three things:
- It connects your experience to the role, choosing the most relevant points from your resume and explaining them.
- It shows genuine interest in the organization and the position, not just in any job.
- It demonstrates how you communicate, which matters in almost every role.
It should not repeat your resume line by line. If the reader could reconstruct your letter from your resume alone, the letter is not adding anything.
The structure that works
Aim for three to five short paragraphs and no more than one page. In most cases, 250 to 400 words is enough.
1. Header and greeting
Include your name and contact details, the date and, if you know them, the employer's details. For online applications, a simplified header is fine.
Address the letter to a named person whenever you can: "Dear Ms Patel" or "Dear Alex Morgan." If you cannot find a name, "Dear Hiring Manager" or "Dear Marketing Team" works. Avoid "To whom it may concern," which feels dated.
Note a small punctuation difference: US English writes "Ms." and "Mr." with a period, while UK English usually omits it.
2. Opening paragraph
State the role you are applying for and give the reader a reason to keep going. Skip the generic opener, or at least follow it immediately with something specific.
Example (fictional): I am applying for the Operations Coordinator role at Lindenfield Logistics. For the past three years, I have coordinated delivery schedules for a regional food distributor, and your focus on reducing empty return trips is exactly the kind of problem I enjoy working on.
3. Why you fit
This is the core of the letter, and it can take one or two paragraphs. Pick two or three requirements from the job ad and show, with concrete examples, how you meet them. Use short stories rather than lists of qualities.
A useful pattern is: situation, what you did, what happened.
Example (fictional): When our warehouse moved to a new site, I was asked to keep deliveries running during the transition. I built a shared schedule with the drivers and the warehouse team, flagged conflicts a day in advance, and we completed the move without missing a single customer delivery.
4. Why this organization
Show that you know who you are writing to. Mention something specific: a product or service, a stated value, a recent project described on their website, or the way the role itself is framed. Then link it to your own motivation.
Keep it honest and brief. One or two sentences of genuine interest are better than a paragraph of flattery.
5. Closing paragraph
Summarize your interest in one sentence, mention that you would welcome an interview, and thank the reader.
Example: I would welcome the chance to discuss how I could support your operations team. Thank you for your time and consideration.
In the US, sign off with "Sincerely" or "Best regards." In the UK, the traditional convention is "Yours sincerely" when you know the recipient's name and "Yours faithfully" when you do not, although "Kind regards" is widely accepted in email applications.
Tailoring without starting from scratch
Writing a completely new letter for every application is exhausting. A more sustainable approach:
- Write a base letter with your strongest examples.
- For each application, rewrite the opening and the why this organization paragraph entirely.
- Swap the examples in the middle to match the two or three priorities of the job ad.
- Adjust your vocabulary to match the terms used in the posting.
This way, the parts a reader pays most attention to are always personal. A tool like the cover letter builder can help you produce a first draft from your resume and the job description, but AI suggestions always need your review: check the facts, remove generic phrases and make sure the result sounds like you.
Tone: professional, not stiff
Cover letters in English tend to be more direct and less formal than in many other languages. You can use "I" freely, keep sentences short and show some personality. Aim for the tone you would use in a polite email to someone you respect but have not yet met.
Some tips:
- Prefer the active voice: "I led the project" rather than "The project was led by me."
- Cut filler phrases like "I believe that" or "I would like to take this opportunity to."
- Avoid overused adjectives such as "passionate" or "dynamic" unless you back them up immediately.
- Do not apologize for what you lack. Focus on what you bring.
Common cover letter mistakes
- Repeating the resume. Select and explain instead.
- Making it all about you. "This job would be a great step for my career" is less compelling than what you can do for them.
- Using the wrong company name. Always double-check when you reuse a letter.
- Going over one page. Long letters rarely get read in full.
- Criticizing a current or former employer. It raises questions rather than answering them.
- Making claims you cannot support. Anything in your letter may come up in an interview.
Formatting and sending
- Use the same font and header style as your resume, so the application looks consistent.
- Save it as a PDF unless another format is requested, and name the file clearly: "Firstname-Lastname-Cover-Letter.pdf."
- If you apply by email, you can paste a shorter version into the body or attach the letter with a brief message.
- Proofread aloud, then ask someone else to read it.
If your resume needs attention too, our guide to common resume mistakes is a good companion to this article.
Key takeaways
- A cover letter explains and connects; it should not repeat your resume.
- Use three to five short paragraphs: opening, fit, why them, closing.
- Back each claim with a short, concrete example.
- Personalize the opening and the why this organization section every time.
- Keep the tone direct and professional, and stay within one page.