Few job-search topics start more arguments than cover letters. Some recruiters say they never read them. Others say a good one can tip the balance. Meanwhile, you're stuck wondering whether to spend an hour writing something that may go unread.
The honest answer is: it depends. This guide helps you decide, and shows how to write one that's worth the effort when you do.
Start with the posting
The simplest rule: follow the instructions.
- If the application requires a cover letter, write one. Skipping it can get you screened out for not following directions.
- If it says optional, you have a choice, and a strong, tailored letter can set you apart.
- If there's no mention and no place to upload one, you can usually skip it, or include a short note in the email or message field if you're applying that way.
When a cover letter helps
A cover letter is most valuable when your resume alone doesn't tell the full story.
Changing careers. A letter lets you connect past experience to a new direction. See our career change resume guide for how the two documents work together.
Explaining a gap or unusual background. A sentence or two of context can help, as we describe in explaining an employment gap.
Limited work experience. If you're just starting out, a letter can show motivation and potential that a short resume can't. Pair it with a resume built from projects and volunteering.
Roles where writing matters. Marketing, communications, journalism, and similar fields often value how well you write.
Smaller companies and direct outreach. When a real person reads each application, personality and genuine interest carry more weight.
A role you really want. If it's a top choice, the extra effort is worth it.
When you can probably skip it
- High-volume, quick-apply postings where applications are screened mostly by software.
- Postings that explicitly say not to send one.
- When you'd only repeat your resume. A generic letter adds nothing, and may even hurt if it's sloppy.
Even then, if you have a real connection to the company or role, a short, specific note can still be a plus. The risk isn't in writing a letter; it's in writing a bad, generic one.
What a good cover letter looks like
Short and specific beats long and formal. Aim for about half a page, three or four short paragraphs.
Opening. Say which role you're applying for and give a specific reason you're interested in this company. Avoid "I am writing to apply for..." as your entire first line.
Middle. Choose one or two achievements that match what the job needs, and explain briefly how they'd help the team. Don't recap your whole resume.
Close. Restate your interest, thank them, and say you'd welcome a conversation.
A short example
Dear [Name],
I was excited to see your opening for a Customer Success Manager, as I've followed [Company]'s work in helping small retailers get online. In my current role, I manage about 60 accounts and recently led an onboarding redesign that cut the time to first value for new customers.
I'd love to bring that same focus on making customers successful early to your team. I'd welcome the chance to talk about how I could help.
Thank you for your time, [Your Name]
(Details are illustrative. Use your own real examples.)
Tips for a cover letter people actually read
- Address a real person when you can find a name; otherwise use a simple greeting.
- Be specific about the company. One real detail beats five generic compliments.
- Show what you'll contribute, not just what you want.
- Keep the tone natural. Write like a professional version of yourself.
- Proofread carefully, including the company's name.
- Match your resume in style and facts.
Using AI without sounding generic
AI tools can help you draft quickly, but the result needs your own details and editing. If you want help, our guide on writing a cover letter with AI explains how to give it the right input. The free cover letter opener tool is also handy if the first line is where you get stuck. For a full letter tailored to a specific job and resume, Corvyx's AI resume builder can generate one for you to edit.
Summary
- Follow the posting: required means write one, optional means it's your call.
- Letters help most for career changers, early-career applicants, writing-heavy roles, and jobs you really want.
- Keep it half a page, specific, and about what you'll contribute.
- Skip a generic letter that just repeats your resume.
- If you use AI, edit the result so it sounds like you.
A short, thoughtful letter can help; a long, generic one never does. When in doubt, write less and make it count.