A cover letter is worth writing when the application asks for one, when your resume does not tell the whole story, or when the role depends heavily on writing and communication. It is often worth skipping when the posting says not to send one, when there is nowhere to upload it, or when you would only repeat your resume. In between, a short, specific letter of roughly 150 to 300 words is usually a low-risk way to add context, as long as you can make it specific to the job.
Nobody can say for certain how often cover letters are read. Published recruiter surveys come largely from commercial sources and disagree with each other, and practice varies by employer, industry and even individual recruiter. Some readers skim them, some read them first and some ignore them. That uncertainty is the reason to decide based on what the letter can add, not on a blanket rule such as “always write one” or “nobody reads them.”
Start with the instructions
The first check is always the application itself.
- If the post says a letter is required, write one. Skipping it can get an application set aside.
- If the post says no cover letters, do not send one.
- If it is optional, use the framework below.
- If the form has no field for it, do not squeeze one in. A short note in a message field, or a couple of sentences in an email to a recruiter, can serve instead.
Following instructions precisely is itself a small signal of professionalism.
A decision framework
Ask five questions. Each yes pushes toward writing one.
- Does my resume leave an obvious question open? A career change, a long gap, a move across countries, a drop in level or a scattered history.
- Does the job involve writing, client communication or persuasion? Communications, marketing, sales, public relations and nonprofit roles often treat a letter as a writing sample.
- Do I have a specific, real reason to want this employer or role? A connection to the mission, a referral or a clear match to a distinctive requirement.
- Is the pool likely small or relationship-driven? Small organizations, referrals and niche roles may be read more closely.
- Can I add something the resume cannot? Context, motivation, a short story or an explanation of fit.
If you answered yes to two or more, a letter is probably worth the effort. If you answered no to all, your time may be better spent tightening the resume and applying to more roles.
Where a letter helps most
| Situation | Why a letter helps |
|---|---|
| Changing careers or industries | Explains the move and bridges your experience |
| Returning after a gap | Gives short, calm context and current availability |
| Relocating | States your plans so you are not screened out by location |
| Small organization | Shows interest and fit; the reader may be the hiring manager |
| Writing or communication roles | Doubles as a work sample |
| Referrals | Lets you name the connection and add detail |
| Stretch roles, matching most but not all requirements | Emphasizes your strongest overlap |
For the first of these, see how to write a cover letter for a career change, and for a gap, handling employment gaps on a resume.
Where it often adds little
- High-volume applications through a system with no letter field and standardized screening.
- Roles where your resume is already a direct match, with the exact title, tools and scale.
- When the only thing you can write is generic. “I am a hard-working professional eager to join your team” can do more harm than no letter.
- When you would repeat the resume in paragraph form.
- Quick-apply buttons that attach a profile and resume automatically.
In these cases a strong, targeted resume usually does more. You can strengthen it by fixing generic areas and tailoring it to the post.
What a short letter should contain
- Opening (1 to 2 sentences): the role and why you fit.
- Evidence (3 to 5 sentences): two accomplishments matching the top requirements.
- Why this employer (1 to 2 sentences): a true, specific reason.
- Close (1 to 2 sentences): interest in talking.
For a fuller breakdown with a sample, see what a cover letter should actually say.
A short note for a small message field
This fictional example runs about 100 words:
“Hello, I am applying for the scheduling coordinator role. For three years I have managed appointment calendars for a four-provider clinic, including walk-in coverage and cancellations. Your posting mentions reducing no-shows, and I started a reminder process at my current clinic that I would be glad to describe. I am relocating to your city in March and am available for interviews by phone or video. Thank you for your time.”
It names the role, gives one relevant detail, ties to the post and handles a logistical question that could cause a screen-out. The details are invented.
Cost and benefit
Be honest about effort. A good first letter takes perhaps 20 to 40 minutes, and 15 to 20 once you have a base to adapt. If you send 30 applications a week, a custom letter for each is not sustainable and can lead to sloppy work. A practical compromise:
- Roles you really want: write a tailored letter.
- Reasonable fits: adapt a base letter with a custom opening and fit paragraph, about 10 minutes.
- Broad applications: skip the letter unless required, and put effort into the resume.
Risks of a weak letter
A letter can hurt if it contains errors or the wrong company name, is clearly mass-produced, highlights a weakness unnecessarily, runs long and repeats the resume, raises pay or schedule demands too early or sounds apologetic. If you cannot write a clear, specific letter, applying without one is acceptable when the application allows.
Alternatives when you skip it
- A strong summary at the top of the resume; see what a resume summary should actually do.
- A short note in the application form, if there is a free-text field.
- A brief email to a recruiter or hiring manager, if you can find a contact and the employer allows it, in three or four sentences.
- Resume edits that make your fit obvious, such as headline and skills changes.
If you do write one, keep these basics
Use the name of the role from the posting, address a person if one is named, keep it to a page at most, and make sure the facts match your resume. Proofread for the company name in particular, because a letter written for another employer is easy to forget to change when you reuse a base version.
Test it yourself
The decision is not permanent. If you notice you rarely hear back for roles where your background is unusual, try short letters for those and keep notes on which applications led to replies. Treat it as a small experiment with one variable changed at a time. Your own record will say more than general advice, though a small number of applications can never prove cause and effect, and results depend on many factors outside your control.
Where this comes from
This guide is based on cover-letter and application guidance published by university career centers, and on common job-search practice. Recruiter surveys on cover-letter use were reviewed but not relied on for figures because they come from commercial sources with differing methods and conflicting results. The sample note is invented for illustration, and no letter can promise an interview or an offer. Prices, rates and limits change, so anything time-sensitive should be checked at the source.