Cover Letter Mistakes That Hurt Your Application

Most cover letter mistakes aren't dramatic. Nobody gets rejected for one slightly awkward sentence. They get rejected because a handful of small problems add up to one impression: this person didn't think much about this job. A generic opening, a recap of the resume, a stiff tone, and a typo in the hiring manager's name each seem minor. Together, they tell the reader to move on.

The good news is that these cover letter mistakes are predictable, which makes them fixable. This guide groups 21 common errors into three categories (content, tone, and format), shows a fix for each, and walks through a full before-and-after rewrite.

At the end, you'll find a 15-minute editing routine and a checklist you can run before every application.

Why small cover letter mistakes cost interviews#

A cover letter is one of the few parts of an application where the employer sees how you think and write. Purdue OWL's cover letter guidance notes that the letter doubles as a demonstration of your written communication skills. Employers care about those skills. In NACE's Job Outlook 2026 Spring Update, employers ranked communication among the most important competencies for new graduates, and said they were less impressed with new grads' communication than with their teamwork.

Tailoring is where letters win or lose#

The evidence on tailoring is clear. In a field experiment by the resume service ResumeGo, researchers sent 7,287 applications between July 2019 and January 2020. Applications with a cover letter tailored to the job received a 53% higher callback rate than applications with no letter at all. In the same project's survey of 236 hiring professionals, 81% said they valued tailored letters significantly more than generic ones.

Writing quality matters, too#

Clean writing helps even when the content is the same. In a large field experiment published by the National Bureau of Economic Research, jobseekers on an online labor market who received algorithmic writing assistance on their resumes were hired 8% more often, with no sign that employers were less satisfied with them. That study looked at resumes, not cover letters, but the lesson carries over: errors make it harder for employers to judge what you can do.

Three kinds of cover letter mistakes#

The 21 mistakes in this guide fall into three groups. Each damages your application in a different way.

Not all mistakes are equally serious#

Some errors end an application on their own. Others just make your letter forgettable. Prioritize your fixes accordingly.

Content cover letter mistakes: what you say#

Content mistakes are the most common and the most costly. They usually come from writing about yourself in general terms instead of about the employer's specific needs.

1. Sending a generic letter#

A generic letter could go to any company with a few names swapped. Readers recognize it within a sentence or two: "I am excited to apply for this position at your company, where I can use my skills and experience."

Fix: Name the specific role and one specific thing about the company in your first paragraph. Then pick proof that matches the posting's top requirements. A job description keyword finder can help you see which skills a posting emphasizes so you know what to prove.

If you're applying to many jobs, you don't have to rewrite everything each time. At minimum, customize these three things for every application:

• The opening sentence: the exact job title and the single strongest match between you and the role.
• The proof you choose: swap in the example that best fits this posting's top requirement.
• The "why this company" line: one detail you could only know by looking at this employer.

2. Repeating your resume#

Many letters walk through the resume in order: "From 2019 to 2022, I worked at... Then I joined... where I was responsible for..." The reader already has your resume. Repeating it wastes the only space where you can add context.

Fix: Pick one or two items from your resume and explain them: why they matter for this job, what you learned, or what the numbers mean. Your letter should answer "so what?" for your resume, not restate it.

3. Making it all about you#

"This role would be a great next step in my career." "I'm looking for an opportunity to grow my skills." These are true, but they're about your needs. The reader is trying to fill theirs.

Fix: For every sentence about what you want, write two about what you'd deliver. Flip "I'm eager to develop my leadership skills" to "I've led three onboarding cohorts and would bring that experience to your growing support team."

4. Making claims without proof#

"I'm a hard-working, detail-oriented team player with excellent communication skills." Every applicant writes this, and none of it is verifiable. Adjectives describe what you think of yourself. Evidence shows the reader what you've done.

Fix: Replace each adjective with a short example. Our guide to resume buzzwords to avoid covers the most common empty phrases and what to write instead.

5. Burying your strongest point#

Many letters start slowly: a sentence about where the applicant saw the posting, another about how long they've admired the company, and only then something relevant. Busy readers may not get that far.

Fix: Put your single best qualification in the first two sentences. If you have a referral, mention it there too. Our guide on how to start a cover letter has opening patterns that lead with value.

6. Over-explaining gaps, departures, and setbacks#

A letter that spends a paragraph on why you left your last job, why you have a gap, or why your degree is unrelated puts the reader's attention on the problem rather than your strengths.

Fix: If something needs explaining, do it in one neutral sentence and move on. "After a year caring for a family member, I'm returning to full-time work and have spent the last three months refreshing my certification." Our guide to an employment gap on your resume covers how much to say and where.

7. Highlighting what you don't have#

"Although I don't have the required five years of experience..." or "I know I'm not the typical candidate..." These openers invite the reader to agree with you.

Fix: Lead with what you do have, and address a gap only by showing how you've covered it. Instead of "I don't have direct SQL experience," try "I've used SQL in two analytics projects this year, both linked in my portfolio."

8. Ending without a clear next step#

Letters that close with "Thank you for your time and consideration" and nothing else leave momentum on the table. So do overly passive lines like "I hope to hear from you."

Fix: End with a confident, specific line about the conversation you want. "I'd welcome the chance to discuss how I'd approach your team's onboarding backlog." See how to end a cover letter for more closing lines.

Tone cover letter mistakes: how you sound#

Tone mistakes make readers doubt you even when your qualifications are strong. They're harder to spot in your own writing, so reading your letter aloud helps.

9. Sounding stiff or overly formal#

"I am writing to formally express my sincere interest in the aforementioned position, for which I believe I am eminently qualified." Language like this sounds like a template from decades ago, and it hides your personality.

Fix: Write the way you'd speak in a professional meeting. Use contractions where natural, short sentences, and plain words. "I'm applying for the operations analyst role, and I think my last two years of inventory work make me a strong fit."

Stiff phrases to watch for, with plain replacements:

• "I am writing to express my interest in" → "I'm applying for"
• "Please find enclosed my resume" → "My resume is attached"
• "I would like to take this opportunity to" → delete it and say the thing
• "At your earliest convenience" → "in the next week or two"
• "I believe I possess the requisite skills" → name one skill and prove it

10. Being too casual#

The opposite problem shows up in emailed letters and internal applications: "Hey there!", slang, emojis, or jokes that rely on knowing the reader. What feels friendly to you can read as unprofessional to someone who doesn't know you.

Fix: Keep greetings professional ("Dear Ms. Chen" or "Hi Dana" if the company is informal), skip slang and emojis, and save humor for the interview, when you can read the room.

11. Flattering the company instead of showing interest#

"Your company is the industry leader, and I've always dreamed of working for such an innovative, world-class organization." Praise without specifics reads as filler, and sometimes as insincere.

Fix: Replace praise with one concrete detail and a reason it matters to you. "Your move to same-day delivery in smaller cities interests me because I've spent three years solving last-mile problems in exactly those markets."

12. Sounding desperate or apologetic#

"I would be so grateful for any opportunity," "I'm willing to do anything," or "I apologize for my lack of experience" lower your perceived value. They can also raise questions about why you're so eager.

Fix: Write as a peer offering something valuable. Gratitude belongs in one sentence at the end, not throughout the letter.

13. Criticizing a current or former employer#

Even mild negativity, like "my current company doesn't value innovation," makes readers wonder how you'll talk about them someday.

Fix: Frame every move as a pull toward something, not a push away. "I want to work on products used by millions of people" works better than "my current company is too small to matter." Our guide to answering why you're leaving your job covers this framing in depth.

14. Sending an AI draft without editing it#

AI tools can draft a clean letter in seconds, and many applicants now use them. The result is often a letter that's grammatically perfect and completely generic, full of phrases like "I am confident my skills align perfectly with your needs" and "I am passionate about driving impact."

Fix: Use AI for structure and polish, not substance. Give it your real examples, then edit every sentence that could apply to anyone. Our guide to writing a cover letter with ChatGPT shows how to keep your voice.

The "after" paragraph keeps the same job (showing you can contribute) but replaces every abstract claim with something observable.

Format and accuracy cover letter mistakes: how it looks and whether it's right#

These mistakes are the easiest to fix and the most embarrassing to miss. Several of them can end your application immediately.

15. Writing too much#

Letters that run longer than a page, or that pack 500 words into dense paragraphs, signal that you can't prioritize. Most strong letters run 250 to 400 words.

Fix: Keep one opening paragraph, one or two proof paragraphs, and a short close. If you're over, cut resume recaps and backstory first. Our guide to the short cover letter shows how much you can say in fewer words.

16. Getting the company, role, or person wrong#

Using the wrong company name, the wrong job title, or misspelling the hiring manager's name is one of the fastest ways to get rejected. It usually happens when you reuse a letter and miss one reference.

Fix: Before sending, search your document for every company name, job title, and person's name, and check each against the posting.

17. Using a lazy or outdated greeting#

"To Whom It May Concern" and "Dear Sir or Madam" aren't fatal, but they signal you didn't look for a name. Gendered greetings when you don't know the recipient's gender are a bigger risk.

Fix: Spend five minutes on the posting, company website, and LinkedIn. If no name turns up, use a specific team greeting such as "Dear Data Engineering Hiring Team." Our guide on how to address a cover letter covers where to look.

18. Typos and grammar errors#

Typos are especially costly in the first line, the greeting, and anywhere you claim to be detail-oriented. For writing-heavy roles, a single error can count against you.

Fix: Proofread in a different format than you wrote in: print it, change the font, or read it on your phone. Read it aloud once, slowly. Then have someone else read it if you can.

Spellcheck won't catch the errors that show up most often in cover letters, because they're real words used wrongly or inconsistencies across the page. Look specifically for:

• Homophones: its/it's, your/you're, their/there, affect/effect.
• Company styling: how the employer writes its own name, including capitalization and spacing.
• Tense shifts: present tense for your current job, past tense for earlier ones.
• Number style: "five" in one sentence and "5" in the next.
• Leftover edits: doubled words, half-deleted sentences, and stray placeholder brackets.

19. Ignoring application instructions#

If a posting asks you to mention a reference code, answer a specific question, keep it under 250 words, or address it to a specific person, it's often a deliberate test. Missing it suggests you'll miss instructions on the job, too.

Fix: Before writing, reread the posting and highlight every instruction about the letter. Check them off before you submit.

20. Formatting that doesn't match your resume or breaks on upload#

A letter in a different font, header style, or color scheme than your resume looks disjointed. Heavy design elements, text boxes, or unusual file types can also scramble when uploaded to an applicant tracking system.

Fix: Use the same header, font, and margins as your resume, and save as a PDF unless the posting requests a Word file. Name the file clearly: "Firstname-Lastname-Cover-Letter.pdf." Our guide to cover letter format covers layout details.

21. Including personal details that don't belong#

U.S. cover letters shouldn't include a photo, your age, marital status, religion, or health information. The U.S. Equal Employment Opportunity Commission advises employers that information like race, sex, national origin, age, and religion is irrelevant to judging qualifications, and that they generally shouldn't ask for photos before an offer. Volunteering this information puts the reader in an awkward spot. The same goes for salary history or expectations unless the posting asks.

Fix: Stick to professional information. If you're applying in a country with different norms, check local conventions first; our guide to international resume formats explains common differences.

A full before-and-after cover letter rewrite#

Seeing several mistakes fixed at once makes the patterns easier to spot. Here's a hypothetical letter for a marketing coordinator role with nine of the mistakes above, followed by a rewrite.

Problems: a generic greeting (17), stiff opening (9), flattery (11), a buried lead (5), resume recap (2), claims without proof (4), highlighting a gap (7), a focus on the applicant's needs (3), and a weak close (8).

The rewrite is compact, at about 150 words, to keep the comparison easy to read. In a real application you could add a second proof paragraph, but add evidence, not background.

What changed:

• The greeting names a real person, and the opening states the role and the strongest match in two sentences.
• Resume history became two specific results with numbers.
• Flattery became one concrete detail about the company.
• The experience gap is addressed with evidence of preparation, not an apology.
• The close asks for a specific conversation.

Scoring the rewrite#

The chart below shows a sample self-audit of the two versions on a 10-point scale. It's a worked example to show how one round of fixes changes a letter, not research data.

Cover letter mistakes in special situations#

Some application types come with their own pitfalls. The table below covers the most common ones and points to detailed guides.

For each situation, our detailed guides go further: the career change cover letter, the internship cover letter, the cover letter for an internal position, and the letter of interest.

Is skipping the cover letter a mistake?#

Sometimes. Whether to send one depends on what the application asks for and how much your resume can say on its own.

Our guide to whether cover letters are necessary covers the edge cases in more detail.

How to catch cover letter mistakes before you send#

You don't need hours to polish a letter. A focused editing routine catches nearly every mistake in this guide in about 15 minutes. Do these steps in order:

1. Instruction check (1 minute). Reread the posting and confirm you've followed every instruction about the letter.
2. Names check (1 minute). Search for every company name, job title, and person's name. Verify each one.
3. Relevance pass (4 minutes). Highlight every sentence that's about the employer's needs or your proof. Cut or rewrite the rest.
4. Specificity pass (3 minutes). Underline every adjective describing yourself. Replace each with an example or delete it.
5. Tone pass (2 minutes). Read it aloud. Fix anything you wouldn't say in a professional meeting.
6. Length check (1 minute). Confirm you're under one page and roughly 250 to 400 words.
7. Proofread (3 minutes). Change the format (print it, enlarge the font, or read on your phone) and read slowly for typos.

Most first drafts shrink during this routine, and that's a good sign. The chart below shows how a hypothetical draft might tighten across the passes.

Get a second reader, and ask the right questions#

A friend who reads your letter and says "looks good" hasn't helped much. Give your reader the job posting and ask specific questions instead:

• After reading the first paragraph, what job am I applying for, and why am I a fit?
• Which sentence is the most convincing, and which is the weakest?
• Is there any sentence that sounds like it could be in anyone's letter?
• Did anything sound apologetic, arrogant, or too casual?
• What's the one thing you remember about me after reading it?

If their answer to the last question isn't your strongest qualification, move that qualification higher and cut whatever is competing with it.

Tools that help#

A cover letter checker can flag generic phrasing, weak structure, and tone problems you might miss after staring at a draft. If you're starting from scratch, a cover letter from resume tool can produce a first draft you then rewrite with the fixes above. Resume Maker's tools work best as a starting point; the specific details still have to come from you.

Cover letter mistakes checklist#

Run through this before every application.

Content

• The letter names the specific role and one specific detail about the company.
• Your best qualification appears in the first two sentences.
• You explain one or two resume items rather than restating your history.
• Every self-description is backed by an example or number.
• Any gap or setback takes one sentence at most.
• The close asks for a specific conversation.

Tone

• It sounds like you speaking in a professional meeting.
• There's no flattery, apology, or negativity about past employers.
• No sentence could have been written by any other applicant.

Format and accuracy

• Every name, title, and company is correct.
• The greeting uses a name or a specific team.
• It's under one page and follows every posting instruction.
• The design matches your resume, and the file is a clearly named PDF.
• There's no photo, age, salary history, or other personal detail that doesn't belong.

Your next steps#

Pick the letter you're working on now and run the 15-minute routine. Start with the dealbreakers (names, instructions, the role you're applying for), then fix content, then tone. You'll usually find that the biggest improvements come from cutting: less backstory, fewer adjectives, more proof.

If you're building a letter from scratch, our complete guide on how to write a cover letter walks through each paragraph. And since many of the same errors show up on resumes, our guide to common resume mistakes is worth a look before you send your next application.