Cover Letter vs. Resume: Key Differences and When to Use Each
See what belongs in each document, when to send a cover letter, and how to tailor both to the same job.
In brief: A resume shows your relevant experience and skills, while a cover letter explains why you want a particular role and how selected experience fits. Your resume is built for scanning; your letter gives you room to make a connection in paragraphs.
Three things to remember
- Make relevant qualifications easy to find on your resume.
- Give your letter something to do besides repeat it.
- Tailor both documents and follow the employer's instructions.
The same project can appear in both. On your resume, show the work. In your letter, explain a connection the reader might otherwise miss.
What each document does
A resume puts your experience, education and skills under headings, often with short bullets. A reader should be able to find the relevant qualifications quickly, even if they don't read every line. The University of Connecticut's resume guide recommends emphasizing experience that matters to your audience.
A cover letter has a narrower job. It makes a case for one position and gives you space to explain your interest, add context to an accomplishment or clarify a career shift. It also gives the employer a sample of your writing.
| Element | Resume | Cover letter |
|---|---|---|
| Main purpose | Present relevant qualifications and experience | Explain your interest and connect selected experience to the role |
| Usual format | Headings and concise bullet points | Short paragraphs addressed to the employer |
| Evidence | Show what you did and, where useful, the result | Explain your contribution or why an example matters to this role |
| Tailoring | Emphasize the most relevant skills and experience | Choose examples and reasons for applying that fit the position |
Before submitting, read the documents side by side. The wording can differ, but both should support the same application.
How to use the same experience in both
Suppose you're a project coordinator applying for a client-facing role. A product launch might be relevant to both documents:
- Resume bullet: "Coordinated a product launch with design, sales and support teams."
- Cover letter sentence: "Coordinating the launch taught me to bring teams together around competing deadlines, a skill I'd bring to your client projects."
The bullet shows the work. The letter draws out a skill and connects it to the new role.
You don't need a different project for each document. You do need a reason to mention it in the letter: here, the applicant uses the launch to show how they brought teams together, rather than simply listing the teams again. Replace these illustrative details with your own truthful, specific experience.
Decide what to send
Check the posting first. It may tell you whether to include a letter, what format to use and where to submit it.
| Application situation | Practical move |
|---|---|
| Both documents are required | Send a tailored resume and cover letter in the requested format. |
| A cover letter is optional | Consider sending one if it adds relevant context you cannot show as clearly in the resume. |
| There is no letter field | Do not force an upload. Use an optional message field only if one is provided and useful. |
| You are changing fields | Highlight transferable work on your resume and, if sending a letter, explain how it applies to the new role. |
Thing is, an optional letter isn't automatically worth writing. If all you'd do is repeat the resume, you may get more value from spending that time on the resume itself.
For an attachment, keep your contact details consistent with your resume. If the letter goes in the body of an email, UT Austin career services recommends putting your contact information in your signature.
Give your cover letter a clear job
Name the position and say why it interests you. Then choose one or two examples that connect your experience to what the employer needs. You don't have to explain every job you've held.
Keep the paragraphs concise. The University of Washington suggests two short body paragraphs. Close by reaffirming your interest, thanking the reader and expressing interest in a conversation. Follow any length or format instructions in the posting.
Some applications ask you to address selection criteria. Look for a separate response field first. If there isn't one, the letter may be a suitable place to connect each criterion with evidence, as the Higher Education Recruitment Consortium advises.
A career shift or international move may need a little context, too, especially if the connection between your previous work and the role isn't obvious from a quick read of your resume. Keep that explanation relevant. You don't have to share personal details you'd rather keep private.
A practical workflow for tailoring both documents
You can start with material you've already written. The work is deciding what matters for this application, then giving each document its own job.
- Read the posting. Mark the main responsibilities and required skills. Check whether the employer requests a cover letter or specifies a file format.
- Tailor your resume. Put relevant experience where a reader can find it. Use the employer's terminology when it accurately describes your work, and keep dates, titles and accomplishments truthful.
- Choose one or two examples for the letter. Explain your contribution and why it matters to the role. Don't copy a resume bullet word for word.
- Add a specific reason for applying. Draw on what you've learned about the position or the organization's work. A genuine connection tells the reader more than generic praise.
- Check both documents before submitting. Proofread the employer's name and job title. Compare your materials with the posting and follow its submission instructions.
Check the details each time, even if you're returning to a familiar project or starting from a previous draft. For broader job-search guidance, see DossierPro's career resources.
Mistakes to avoid before submitting
A final read can catch problems that are easy to miss while you're concentrating on your experience:
- Retelling the entire resume. Let the letter explain a connection that isn't as clear in the resume, rather than walking through every job again.
- Using generic praise. Give a genuine reason the position or organization interests you.
- Copying misleading keywords. The employer's language can help, but use it only when it accurately describes your experience.
- Missing basic details. Check the employer's name, the role title and the requested submission format.
- Assuming every market uses the same conventions. If you're applying abroad, check the employer's instructions and a reliable local career resource. Resume and CV expectations, including expectations about personal details, can vary.
To be honest, the last check is easy to rush. Take another look at the instructions before you send anything.
Cover letter vs. resume FAQs
Do I need a cover letter if I have a resume?
Yes, if the employer requires one. If it's optional, consider whether a tailored letter would add useful context or explain your interest in a way the resume doesn't.
Can I use the same cover letter for every job?
You can reuse a starting draft, but revise it for each application. Check the employer's name, the position title and the examples you've chosen before sending it.
Should my cover letter repeat my resume?
It can mention the same achievement. Use the extra space to explain your contribution or why that experience matters to the position, rather than repeating the bullet.
How long should a cover letter be?
Keep it concise and focused on the role. Follow any length or format instructions in the posting.
The bottom line
Pick an application you're working on and highlight its main requirements. Check that your resume shows relevant evidence. If you're sending a cover letter, use it to explain the connection.