Writing a cover letter typically takes about 30 to 60 minutes when you have a résumé and the job posting ready. A first draft may take less time, but tailoring the letter, checking details, and proofreading can add another 15 to 30 minutes; a new or complex application may take longer.
What the Time Estimate Includes
There is no fixed time because “writing a cover letter” can mean anything from adapting a saved draft to developing a letter from scratch. A useful estimate separates the work into stages rather than treating the task as typing alone:
- Reviewing the job posting and résumé: about 5–15 minutes to identify the employer’s needs and select relevant experience.
- Planning and drafting: roughly 15–30 minutes to choose examples and write a focused first version.
- Tailoring and proofreading: around 10–20 minutes to align the letter with the specific role, correct errors, and check formatting.
These are practical planning ranges, not guaranteed durations. If you already have a strong, relevant draft, an application may take 15–30 minutes to customize. If you are changing industries, explaining an unusual career path, or applying for a role that requires a detailed response, allow an hour or more.
Why Some Letters Take Longer
The biggest factor is how much relevant information you need to find and shape. A résumé lists experience; a cover letter explains why particular parts of that experience matter for this particular job. That reasoning often takes longer than writing the sentences.
- A specific or senior role: You may need to connect several achievements to the job’s responsibilities rather than rely on a general introduction.
- A career change or employment gap: The letter may need a concise explanation that is accurate and focused on your qualifications.
- Limited information: If the posting is vague or your résumé does not describe measurable results, it can take time to decide which examples best support your application.
- Application instructions: Some employers ask for particular topics, a named contact, or a specific submission format. Following those instructions takes extra review.
- Writing confidence: People who find it hard to summarize their strengths may need several drafts. That is a reason to set aside more time, not to add unnecessary length.
A short, targeted letter can require more thought than a long generic one. The goal is not to fill a page; it is to make a credible connection between the role and your experience.
A Practical Workflow
Use a simple sequence to keep the task moving and avoid polishing sentences before you know what the letter needs to say.
- Read the posting carefully. Note the main responsibilities, required qualifications, and any application instructions.
- Choose one or two relevant examples. Look for experience that demonstrates a skill the posting emphasizes. Be ready to explain what you did and, where appropriate, the result.
- Draft the core message. Open by naming the role and your interest, use the middle to connect your evidence to the job, and close by expressing interest in discussing the application.
- Tailor the details. Check the position title, employer name if applicable, recipient name if known, and any role-specific wording. Do not leave details from another application behind.
- Proofread and prepare the file. Read the letter once for meaning and once for errors. Confirm that the document is legible and follows the requested format.
For example, someone applying for a customer-support position might select an example of resolving a difficult customer issue rather than repeat every duty from a previous job. Choosing that example is part of the writing work: it makes the letter specific without requiring a long narrative.
Template: A Reusable Starting Point
Dear ____________________,
I am applying for the ____________________ position at ____________________. My experience in ____________________ has prepared me to contribute to ____________________.
In my role as ____________________, I ____________________. This experience is relevant to your need for ____________________ because ____________________.
I would welcome the opportunity to discuss how my background could support ____________________. Thank you for considering my application.
Sincerely,
____________________
Sample — fictional details:
Dear Jordan Lee,
I am applying for the Library Assistant position at Northfield Community Library. My experience helping visitors find information has prepared me to support a welcoming service desk.
In my role as a volunteer at the fictional Cedar Street Reading Room, I organized returned books and helped visitors locate materials. This experience is relevant to your need for someone who can assist patrons and keep shared resources orderly.
I would welcome the opportunity to discuss how my background could support your library team. Thank you for considering my application.
Sincerely,
Alex Morgan
The template is a starting point, not a form to submit unchanged. Replace each blank with accurate information, adapt the evidence to the job, and remove any sentence that does not help explain your fit.
How Much Time to Set Aside
For one well-matched application, reserve about 45 minutes if you have your résumé and job posting ready. A workable allocation is 10 minutes to review and plan, 20 minutes to draft, and 15 minutes to tailor and proofread. Give yourself more time when you need to research the organization, explain a career transition, or respond to application prompts.
For several applications, reuse structure and relevant examples, but do not send the same unchanged letter to every employer. A brief customization still requires checking that the role, qualifications, and examples match. It is often more useful to complete fewer carefully tailored applications than to rush out generic letters.
Also distinguish writing time from the entire application process. Finding a suitable vacancy, updating a résumé, gathering references, and completing an online form are separate tasks and can take substantially longer than the letter itself.
Common Time-Wasting Mistakes
Overediting is a common reason a cover letter takes too long. Rewriting the opening repeatedly or searching for an impressive phrase can distract from whether the letter offers clear, relevant evidence. Set a limit for drafting and revising, then make another pass only if you find a real problem.
- Starting without the posting: This encourages broad claims that are hard to tailor later.
- Repeating the résumé: Use the letter to explain the relevance of selected experience, not to reproduce the full work history.
- Making unsupported claims: Keep statements about skills and results accurate and consistent with your experience.
- Using an old draft without checking it: Confirm names, job titles, dates, and examples before sending.
- Trying to sound formal at the expense of clarity: Direct, professional language is usually easier to understand and quicker to edit.
A cover letter does not need to be perfect in an abstract sense. It needs to be accurate, relevant, readable, and complete enough to satisfy the employer’s instructions.
Frequently Asked Questions
Can I write a cover letter in 15 minutes?
Possibly, if you already have a relevant draft and only need to tailor it carefully. Starting from scratch in 15 minutes may leave too little time to select evidence and check the details.
How long should a cover letter be?
There is no universal length requirement, so follow the employer’s instructions. In general, keep it concise enough to read quickly while providing a clear reason for your interest and relevant evidence.
Should I write a new cover letter for every job?
It is reasonable to reuse a basic structure and adaptable examples, but tailor the content to each role. Check the employer, position, requirements, and evidence rather than submitting a generic letter unchanged.
Does a cover letter need to take an hour?
No. An hour is a useful allowance for a fresh or demanding application, not a requirement. A straightforward application with relevant materials ready may take less time.
What should I do if the application says a cover letter is optional?
Follow the application instructions and decide whether a focused letter would add useful context, such as explaining a relevant transition or showing how your experience matches the role. Do not send one that merely repeats your résumé.