10 Cover Letter Mistakes That Get You Rejected

Most rejected cover letters don't fail because the applicant was unqualified. They fail because of a handful of avoidable mistakes that show up again and again — the same ones a recruiter has seen a hundred times that week. If job hunting has started to feel like a frustrating process where you keep getting silence instead of a reply, there's a decent chance your letter is making one or more of these errors. Remember, a cover letter's only real job is to earn an interview — not to get you hired outright.

Below are the ten mistakes that come up most often when recruiters in recruitment and hiring talk about what makes them stop reading, along with what to do instead.

1. Starting with "I am writing to apply for..."

This opening line tells the reader nothing they don't already know — they can see the job title in the subject line. It's also the single most common opening line recruiters report seeing, and it practically screams generic template before the letter has said anything about you. Open with something specific instead: a result you've delivered, a problem you understand about the role, or a direct connection to the company's work.

Fix it

Replace the generic opener with one sentence that could only apply to you and this job. For example: "In three years managing paid social for a 12-person e-commerce brand, I cut customer acquisition cost by 31% — the kind of result I'd like to bring to [Company]'s growth team."

2. Repeating the resume word for word

A cover letter that lists the same bullet points as the resume, just in paragraph form, gives the reader zero new information. The resume already told them what you did. The letter's job is to explain why it matters and why you're applying here specifically.

3. Making it about you, not the employer

Letters full of "I want," "this is my dream job," and "this opportunity would help me grow" read as self-focused. Every hiring manager is ultimately asking one question: what does this person do for us? Reframe each claim around the value you bring rather than what you want to grow into.

4. Ignoring the job description entirely

Generic letters that could be sent to any company for any role are easy to spot, and they're usually the first ones set aside. The job description tells you exactly which skills and priorities matter to this employer — mirroring that language (naturally, not by stuffing keywords) signals that you read it carefully. It's also worth keeping the story consistent with your LinkedIn profile and resume, since recruiters often check both.

5. Formatting That Breaks Applicant Tracking System (ATS) Parsing

Many companies use an applicant tracking system to collect and sort every resume and cover letter before a human ever sees them. Companies use applicant tracking systems mainly to handle high application volume — but it means your formatting has to work with the software, not just look good to a person. Text boxes, tables, columns, unusual fonts, and headers/footers with contact info can confuse these parsers, sometimes causing your letter to be misread or skipped entirely.

This is one reason implementing an ATS has become standard even outside large corporations: it's the fastest way for a company to know an applicant tracking system is actually working through applications correctly instead of losing good candidates to a formatting glitch. Stick to a single-column layout with standard fonts so your resume and cover letter parse the same way a person would read them.

6. Being too long — or too short

Letters under 150 words often feel like an afterthought. Letters pushing past 400 words start to feel like a waste of time for someone reading fifty of these in a day. The range recruiters consistently say they'll actually finish reading is 250 to 400 words — enough to make a real case, not so much that it becomes a chore.

7. Vague claims with no evidence

"I'm a hard worker with strong communication skills" or "proficient in cross-functional collaboration" says nothing a reader can verify. Specific, measurable claims are far more convincing: "I trained four new hires in my first year while maintaining a 98% on-time delivery rate" does more work in one sentence than three vague adjectives.

8. Typos and copy-paste leftovers

Nothing signals carelessness faster than a letter riddled with typos, or a leftover company name left over from a different application. It suggests the same carelessness might show up on the job. Always proofread the final version out loud before sending — reading silently, your eyes tend to skip over the exact typo a recruiter will catch in three seconds.

9. Ending without a clear next step

Letters that trail off with "Thank you for your consideration," "I'm available at your earliest convenience," or "I believe I would be a great fit" miss a chance to sound confident — those lines could close any letter for any role. End with a direct, specific line about next steps instead: "I'd welcome the chance to talk through how this experience could apply to your team's current goals."

10. Sounding Like a Generic AI-Written Template

AI can speed up writing a cover letter, but pointed at a job description with no other input, it tends to produce the same recycled phrases every other applicant's AI tool also produces. If a recruiter has read fifteen letters that week opening with a version of the same sentence, a generic AI cover letter is easy to spot. The fix isn't avoiding AI — it's giving it specific details about your experience and letting it personalize the result instead of settling for a template with your name swapped in.

Frequently Asked Questions

Related: How to Write an ATS-Friendly Cover Letter in 2026 · US vs UK Cover Letter Differences