7 Cover Letter Mistakes That Kill Your Chances

Most cover letters are a waste of everyone's time. They're generic, boring, and add zero value to the application. But a good cover letter? That can be the difference between a rejection and an interview.

Here's the uncomfortable truth: most hiring managers don't read cover letters. They skim them. Or they skip them entirely and go straight to the resume. But when they do read them, a bad cover letter can absolutely tank your chances.

We've analyzed over 15,000 job applications at KINETK, and the patterns are clear. The same mistakes show up again and again. Let's break down the seven worst offenders—and more importantly, how to avoid them.

1Rehashing Your Resume

This is the most common mistake by far. You write a cover letter that basically says "Here's what's on my resume, but in paragraph form." The hiring manager just read your resume. They don't need a summary.

Your cover letter should add something new. It should tell a story your resume can't. Maybe it's why you're passionate about this specific company. Maybe it's a challenge you overcame that shows your character. Maybe it's how your unusual background gives you a unique perspective.

What to do instead: Pick one or two key experiences from your resume and expand on them. Give context. Show your thinking. Explain the impact in a way bullet points can't capture.

Example: The Wrong Way

"I have 5 years of experience in digital marketing. I managed a team of 3 people. I increased website traffic by 40%. I have experience with Google Analytics, SEO, and content marketing."

This tells the hiring manager nothing new. It's just resume bullet points turned into sentences.

Example: The Right Way

"When I joined my last company, our blog was getting 2,000 visitors a month. I noticed we were creating great content but nobody could find it. I rebuilt our entire SEO strategy from scratch—keyword research, internal linking, technical fixes most people don't think about. Eighteen months later, we hit 50,000 monthly visitors. But what I'm most proud of is that my team now runs that system without me. I built something sustainable."

Same person, same experience. But this version tells a story. It shows problem-solving, leadership, and long-term thinking. That's what a cover letter is for.

2Using a Generic Template

"I am writing to express my interest in the [Position] role at [Company]." If your cover letter starts like this, you've already lost. Hiring managers can spot a template from a mile away.

The problem isn't using a template as a starting point—it's not customizing it. Every cover letter should be specific to the company and role. If you could send the same letter to five different companies with just a find-and-replace, you're doing it wrong.

What to do instead: Start with something specific to the company. Reference a recent news article, a product launch, something the CEO said in an interview. Show you've done your homework. The first sentence should make it clear this letter is for this company, not any company.

3Focusing on What You Want

"I'm looking for a role where I can grow and develop my skills." "I want to work for a company that values its employees." "This position would be a great opportunity for me to learn."

Here's the thing: companies don't hire you because it's good for you. They hire you because it's good for them. A cover letter that talks about what you want misses the entire point.

What to do instead: Flip the script. Focus on what you can do for them. "Here's the problem I can solve for you. Here's the value I can add. Here's why hiring me makes your life easier."

This doesn't mean you can't mention your goals. But frame them in terms of mutual benefit. "I'm excited to grow my skills in X because it will let me contribute even more to Y."

4Being Too Formal (or Too Casual)

"Dear Sir or Madam, I am respectfully submitting my application for your consideration." Nobody talks like this in real life. It sounds stiff and outdated. On the flip side, "Hey there! Super excited to apply for this gig!" is too casual for most industries.

The right tone depends on the company and role. A fintech startup might appreciate something more conversational. A law firm probably wants traditional. But here's a good rule of thumb: write like you'd speak in an interview. Professional, but human.

What to do instead: Read the company's website, their job postings, their LinkedIn content. Match their energy. If they're formal, be formal. If they're casual, loosen up. And when in doubt, err on the side of professional but not stuffy.

5Making It All About Skills, Not Results

"I have strong communication skills. I'm a team player. I'm detail-oriented and organized." These are empty claims. Anyone can say they have strong communication skills. The question is: can you prove it?

Skills matter, but results matter more. Don't tell me you're a great salesperson—tell me about the $500K deal you closed. Don't tell me you're organized—tell me about the project you delivered two weeks early.

What to do instead: For every claim, ask yourself: can I back this up with a specific example? If not, cut it or replace it with something concrete. "I'm detail-oriented" becomes "I caught a billing error that saved the company $40,000." Same trait, but now it's memorable.

6Writing Too Much

The ideal cover letter length is 250-400 words. Three to four paragraphs. One page, max. Anything longer and you're testing the hiring manager's patience.

We've seen cover letters that run two, three, even four pages. Nobody is reading that. The hiring manager has 50 other applications to get through. They're not looking for your life story—they're looking for reasons to interview you or reject you.

What to do instead: Be ruthless with editing. Every sentence should earn its place. If a sentence doesn't add new information or make you more compelling, cut it. Brevity is a skill. It shows you can communicate efficiently—something every employer values.

7Typos and Basic Errors

This one should be obvious, but we see it constantly. Misspelled company names. Wrong job titles. "Their" instead of "there." Cover letters addressed to a different company than the one you're applying to.

A single typo won't automatically disqualify you. But it plants a seed of doubt. If you can't be bothered to proofread your cover letter, can you be trusted with client presentations? Detailed reports? Customer communications?

What to do instead: Read your cover letter out loud. You'll catch errors your eyes skip over. Then have someone else read it. Then read it again. For job applications, the stakes are high enough to justify the extra effort.

The Cover Letter That Actually Works

So what does a good cover letter look like? Here's a simple structure that works:

1. Opening paragraph (2-3 sentences): Hook the reader with something specific about the company or role. Show you've done your research.
2. Middle paragraph(s) (150-200 words): Tell a story that demonstrates your value. Pick one or two key experiences and go deep. Show, don't tell.
3. Closing paragraph (2-3 sentences): Reiterate your interest, mention next steps, and thank them for their time.

That's it. Simple, but not easy. The hard part is making every sentence count.

Do You Even Need a Cover Letter?

Some applications make cover letters optional. Should you write one?

Our advice: almost always yes. Even if it's optional, a good cover letter sets you apart from candidates who didn't bother. It shows you're willing to put in extra effort. And it gives you another chance to make your case.

The exception: if you genuinely don't have anything meaningful to add beyond your resume, skip it. A generic cover letter is worse than no cover letter.

The Bottom Line

A cover letter won't get you a job on its own. But a bad one can definitely lose you one. Avoid these seven mistakes, focus on adding value rather than checking a box, and you'll be ahead of most applicants.

And if you want help crafting a cover letter that actually works, that's included in our Pro and Elite packages. We don't do generic templates—we write cover letters tailored to your story and your target roles.