10 Cover Letter Mistakes That Get Your Application Rejected

A cover letter has one job: give a recruiter a reason to keep reading your resume with interest instead of skimming it. Indeed's guide to writing a cover letter recommends a three-paragraph structure — introduction, supporting, closing — and most cover letters fail by deviating from that in the same predictable ways. Here are the mistakes that show up most often — and what to do instead. (If you're not sure whether you actually need a cover letter or a motivation letter, start there first.)

1. Restating the resume in sentence form. If your cover letter just lists the same bullet points as prose, it adds nothing. Use it to explain the why behind your background, not repeat the what.
2. Opening with "I am writing to apply for...". It's true of every cover letter ever written and wastes the one line recruiters actually read closely. Open with something specific to you or the role instead.
3. Being generic enough to send to any company. If you could swap the company name and the letter still works, it reads as mass-produced — and often is.
4. Focusing entirely on what you want. "This role would help me grow my career in..." tells the employer nothing about what you'd do for them. Flip the framing to what you bring.
5. Ignoring the actual job description. Letters that don't reference specific requirements or responsibilities from the posting read as untailored, even if the writing itself is strong.
6. Being too long. One page, ideally 3–4 short paragraphs. A cover letter competing with dozens of others gets skimmed, not studied.
7. Undermining yourself. Phrases like "I don't have much experience in X, but..." plant doubt before the recruiter has even judged you. Lead with what you can do.
8. No clear call to action. End with a specific, confident close — availability for a conversation, not a vague "looking forward to hearing from you."
9. Typos and formatting errors. Especially the wrong company name left over from a template — an easy miss when reusing the same letter across applications, and an instant credibility hit.
10. Sounding like a form letter, even when AI-written. AI-generated cover letters fail the same way human-written generic ones do: when they don't pull in specifics from your actual background and the actual posting. The fix isn't avoiding AI — it's making sure whatever tool you use is reading the real job description and your real experience, not filling in a template.

What a stronger opening actually looks like

Compare a generic opener — "I am writing to apply for the Marketing Manager position at your company" — with something anchored to the role: "Your team's shift toward lifecycle marketing over the past year is exactly the kind of work I've spent the last three years doing at [Company], where campaign automation cut onboarding drop-off by a meaningful margin." The second version does three things the first doesn't: it shows the writer actually read the posting, it leads with a concrete result, and it gives the recruiter an immediate, specific reason to keep reading.

How long should a cover letter actually be?

One page, and usually well under it — three to four short paragraphs is the practical target. An opening that's specific to the role, one or two paragraphs connecting your relevant background to what the posting actually asks for, and a short, confident close. Anything that requires scrolling on a screen is almost certainly longer than it needs to be.

The fastest fix: tailor per job description, every time

Nearly every mistake on this list traces back to the same root cause — writing (or reusing) one letter for many applications. zeroApply.ai generates a fresh cover letter or motivation letter from the actual job posting each time, matched to the company's tone and the role's requirements, and keeps every line editable so you can add the specific detail that makes it sound like you, not a template. Pair it with a resume that's just as tailored — see our guide to ATS-friendly resumes — and get started free.