The short answer
Follow the instructions in the posting first — they override everything else. Where there are none: if you are emailing a person directly, put the letter in the body of the message, because attachments add a step. If you are emailing a shared applications inbox, attach a PDF and write a short covering note in the body. Name your files with your name and the role, and check the attachment is actually there.
What matters most
- Written instructions in the posting beat every general rule, including everything on this page.
- Emailing a named person: put the letter in the body. Emailing an inbox: attach it and write a short note.
- The subject line should contain the role and your name. "Job application" is not a subject line.
- PDF unless the employer or recruiter asks for Word, and name the file with your name and the role.
Instructions first
Before any of the reasoning below applies, look at what the posting asks for. "Send your CV and covering letter as a single PDF to careers@" is an instruction, and following it is the first thing you will be assessed on. A meaningful number of applicants do not, and it is an easy pile to discard.
The same goes for reference numbers, subject line formats and file naming conventions. Where an employer has specified something, doing it their way is worth more than doing it the best way.
Body or attachment: how to decide
The honest position is that neither is universally right. Some hiring managers want the letter in front of them without a download; some want a clean file to save into the applicant record. The useful question is who is opening the email.
| You are emailing | Do this | Reasoning |
|---|---|---|
| A named hiring manager directly | Letter in the body, resume attached as PDF | Every extra click loses readers. A person opening a direct approach on a phone will read a message body and may not download anything. |
| A shared applications inbox | Short covering note in the body, letter and resume attached | The inbox is processed by someone filing documents into a system. Clean, separately named files are what they need. |
| A recruiter you have spoken to | Whatever they asked for; otherwise attach both | Recruiters forward your documents to clients, so they want files they can send on without reformatting your email. |
| A referral contact who offered to pass it on | Body of the email, kept short, resume attached | They are forwarding it to a colleague, so the message should read well on its own when it appears in someone else's inbox. |
| An address given in a printed or offline advert | Attach both as PDF, brief note in the body | You have no information about the reader, so the conservative, conventional choice is right. |
The one thing to avoid is doing both badly: pasting the full letter into the body and attaching the same letter, with a body message that says "please see attached". That gives the reader the same text twice and a covering note that says nothing.
The subject line
It decides whether the email is opened now, later or never, and it is also how your application will be found again in three weeks when someone is assembling a shortlist. Make it searchable.
Subject: Job application
Subject: Operations Manager (ref OPS-114) — application from James Okafor
- Include the role title exactly as advertised. Employers frequently run several similar vacancies, and "Analyst" does not distinguish between three of them.
- Include the reference number if there is one. Many applicant systems route on it.
- Include your name. The sender field may show an email address rather than a name, particularly on forwarded messages.
- If you were referred, say so. "Referred by Priya Raman" in the subject line changes how quickly a message gets opened, and it is the one piece of information worth the characters.
Files: format and naming
Send PDF unless someone has asked for Word. A PDF looks the same on every machine, which a DOCX does not — fonts substitute, spacing shifts and a carefully laid out letter can arrive with a widow line on page two.
The exception is recruitment agencies, which often need an editable file so they can add a cover sheet before sending you to a client. If a recruiter asks for Word, send Word.
- Good file names
- James-Okafor-Cover-Letter-Operations-Manager.pdf and James-Okafor-Resume.pdf. Sortable, searchable, and obviously yours when they are sitting in a folder with thirty others.
- Bad file names
- coverletter.pdf, CL_final_v3.pdf, Document(2).pdf, resume-USE-THIS-ONE.pdf. All real patterns, all of which arrive in a shared folder and immediately become someone else's problem.
- Avoid
- Spaces where you can use hyphens, version numbers, dates, and anything that reveals your editing history. Nobody needs to know this is version seven.
Formatting that survives
A letter written in a word processor and pasted into an email or a web form frequently arrives mangled — curly quotes turned into question marks, bullet characters replaced, indentation collapsed. The fix takes thirty seconds.
- Paste into a plain text editor first, which strips the formatting your word processor carried along.
- Replace any bullet characters with hyphens or, better, rewrite the list as a sentence. Bullets in a short letter usually mean the argument was not organised.
- Put a blank line between paragraphs rather than indenting the first line, because indentation does not survive plain text.
- Send the message to yourself first and read it on a phone. Most application email is read on a phone.
Text boxes and portal fields
Many applicant tracking systems offer a text area instead of an upload. Treat it as the letter, not as an afterthought. Do not write "please see attached" — there may be nothing attached, and the field is often the only thing a screener reads.
Do not paste a formal letterhead with your address, the date and the employer's address into a text box either. It arrives as five stray lines above the actual content and looks like a document dropped in the wrong place. Start at the greeting and write three tight paragraphs to whatever character limit is given. Length guidance for each channel is set out in how long should a cover letter be.
The covering note, when you attach
If the letter is attached, the email body still needs to say something. Three or four lines: which role, one sentence on why you are relevant, what is attached, and a sign-off. It is a doorway rather than a summary.
An example: "Dear Ms Alvarez — I am applying for the Billing Manager role (ref FIN-208). I spent the last two years clearing a claims backlog after a practice management migration, which your posting suggests is the immediate problem here. My letter and resume are attached. Best regards, Dana Okonkwo." Forty-eight words, and it gives a reason to open the attachment.
To see finished letters in context before you send one, the customer service representative example and the rest of the examples library cover several hundred roles, and the resume builder exports a matching pair of files with sensible names already applied.
Questions people actually ask
Should a cover letter be in the email body or attached?
It depends who is receiving it and what the posting asks for. Emailing a named hiring manager directly, put it in the body so there is nothing to download. Emailing a shared applications inbox, attach a PDF with a short covering note in the body. Written instructions in the posting override both.
What should the subject line of a job application email be?
The role title exactly as advertised, the reference number if there is one, and your name. For example: "Operations Manager (ref OPS-114) — application from James Okafor". It gets opened and, more importantly, it can be found again when a shortlist is being assembled.
Should I send my cover letter as a PDF or Word document?
PDF, unless someone has asked for Word. A PDF renders identically everywhere, while a Word file can substitute fonts and shift spacing on a different machine. Recruitment agencies often need Word because they add a cover sheet before sending you on, so follow their request when they make one.
What should I write in the email if the cover letter is attached?
Three or four lines: which role you are applying for, one sentence on why you are relevant, a note of what is attached, and a sign-off. Never write only "please see attached", which wastes the one part of the message that is guaranteed to be read.
Do I still need a cover letter if I am applying through a form?
If the form has a letter field or a text box, yes — that field is the letter and is often the only free text a screener reads. Write to the character limit rather than pasting a longer document and letting it truncate part way through a sentence.
