What Is a Cover Letter? A Plain Guide for Job Seekers

Think of the cover letter as the bridge between the job advert and your resume. A recruiter reads the ad, then reads your resume, and has to work out on their own whether the two match. A cover letter does that work for them. It points to the two or three things in your background that matter most for this role and says so in plain sentences.

It also shows something a resume cannot: how you write. Harvard's career office calls the cover letter "a writing sample and a part of the screening process." A clear, specific letter shows that you can explain your thinking and that you read the job ad carefully. A generic letter shows the opposite, even if your experience is strong.

People search for this document under many names: cover letter, covering letter, CV letter, job cover letter, cover message for a job application, or application cover letter. In everyday hiring these all mean the same thing, a letter that introduces your application. In the UK you will hear "covering letter" more often; in the US, "cover letter" is standard.

Most cover letters follow the same order. Prospects suggests "three to five concise paragraphs" that "should not exceed one A4 page." Here is what each part does.

The Prospects paragraph guide matches this order: the opening "should set out why you're writing the letter," the second paragraph should "highlight any relevant experience and demonstrate how your skills match the specific requirements of the job description," and the last should "reiterate your interest in the role and indicate your desire for an interview."

Greeting and sign-off rules

Try hard to find a name. Prospects says to "always try and address your cover letter directly to the person who will be reading it," and to use a general greeting such as "Dear Hiring manager" only after you have run out of ways to find a contact. In British English the sign-off follows the greeting: "Yours sincerely" after a named contact, "Yours faithfully" after "Dear Sir/Madam." In American English, "Sincerely" works for both.

These three documents get mixed up, especially when a job ad says "send your CV and letter." The difference is about purpose, not length.

In many countries "application letter" and "cover letter" are used for the same thing. The distinction matters most where a formal application letter is the primary document, for example some government, school or graduate programs. If that is your case, the application letter tool uses a more formal structure. For a speculative approach to a company that is not advertising, use a letter of interest instead.

A resume and a cover letter should look like a pair. Harvard advises that you "ensure your resume and cover letter are prepared with the same font type and size." If you build both here, the resume builder and the generator share the same clean typography.

Send one whenever the application allows it, unless the employer clearly says not to. Situations where a cover letter does the most work:

• The ad asks for it. If the listing says "please include a cover letter," a missing letter can look like you did not read the ad.
• You are changing careers. Your resume shows a different field. The letter explains how your skills transfer. See the career change example.
• You have little experience. Students and first-time applicants can use the letter to show coursework, projects and motivation. The cover letter with no experience page covers this case, and internship cover letters have their own guide.
• There is a gap or a move. A short, factual line about relocating or returning to work prevents guesswork.
• Someone referred you. Naming the person in the first line makes the connection clear.

When an online form has no upload field and no text box for a letter, you do not need to force one in. You can still use the same content in an email to the recruiter if you have their address.

Career offices agree on a short list. Harvard's tips: "Keep letters concise and factual, no more than a single page," "Tailor your letters to specific situations or organizations by doing research before writing your letters," "Avoid flowery language," and "Give examples that support your skills and qualifications." nidirect adds that the letter should "give the prospective employer a reason to want to read your CV."

In practice that means three habits:

1. Mirror the job ad. Pick two requirements from the ad and answer each with something you have done. Harvard puts it as "reference skills or experiences from the job description and draw connections to your credentials."
2. Use one number or concrete result. "Cut first-response time from two days to six hours" says more than "excellent communication skills."
3. Cut what the resume already says. Do not retell your job history line by line. Choose the parts that fit this job.

Common weak spots are the opposite: a letter that could be sent to any company, an opening that only repeats your name, and a closing that does not ask for anything. The step-by-step guide on how to write a cover letter walks through each paragraph with before and after lines.

Formatting is simple, and that is the point. Keep it to one page, use a readable font at a normal size, and leave white space between paragraphs. A few specifics:

• Paper size. US Letter in the US, Canada and a few other countries; A4 almost everywhere else. The generator lets you pick either.
• Date style. "October 25, 2026" is the US style; "25 October 2026" is the UK and international style.
• File type. PDF keeps your layout fixed. Some portals ask for Word; check the instructions in the job ad.
• Email applications. Put the letter in the email body or attach it as a PDF, and use a clear subject line such as "Application for Customer Success Manager - Jordan Lee."

If a recruiter's system parses your documents, plain text in a normal reading order is the safest choice. The same rules apply to your resume; see the ATS-friendly resume guide.

Here is a compact example for an advertised role. It follows the four-part order above and fits comfortably on one page.

This sample uses fictional names. For eight complete letters for different situations, see cover letter examples; each one opens in the generator so you can replace the details with your own.

You can write a cover letter in any word processor. If you would rather not start from a blank page, the generator here asks for the details that matter, places them in a proven structure and shows the letter as you type. Everything stays in your browser: nothing you enter is sent to a server, and the PDF download is free with no watermark and no account.

Already have a resume? Build or update it with the resume builder or the CV maker so both documents match. Leaving a job instead? The resignation letter generator and the thank-you email after an interview use the same engine.