8 Cover Letter Mistakes That Cost You Interviews

Updated March 2026 · 6 min read

Your cover letter is often the first impression a hiring manager has of you — and a bad one can kill your chances before they even glance at your resume. Despite the rise of AI tools and one-click applications, 83% of hiring managers say a strong cover letter can convince them to interview a candidate whose resume alone wasn't a perfect match.

The problem? Most job seekers make the same avoidable mistakes over and over again. Here are the eight most common cover letter errors and exactly how to fix each one.

1. Using a Generic Opening

Starting your cover letter with "Dear Hiring Manager" or "To Whom It May Concern" signals that you haven't bothered to research the company. Recruiters see hundreds of these each week and they blend together instantly.

Fix: Find the hiring manager's name on LinkedIn, the company website, or even by calling the front desk. Address them directly: "Dear Sarah Chen" is immediately more engaging. If you truly cannot find a name, use a specific title like "Dear Marketing Team Lead."

2. Repeating Your Resume Word for Word

Your cover letter is not a summary of your resume. If a recruiter wanted to read your resume, they would — and they will. A cover letter that simply restates your job history in paragraph form wastes valuable real estate.

Fix: Use your cover letter to tell a story your resume can't. Highlight one or two achievements in context, explain your motivation for applying, or connect a specific experience to the role. Think of it as the "why" behind the "what."

3. Writing Too Long

A cover letter that exceeds one page — or even stretches beyond three or four tight paragraphs — will likely go unread. Hiring managers spend an average of 30 seconds scanning a cover letter. Anything beyond half a page is pushing your luck.

Fix: Keep it to 250-350 words. Three to four paragraphs: a hook, your value proposition, a specific example, and a closing. Every sentence should earn its place.

4. Not Researching the Company

Generic cover letters that could apply to any company at any time tell the recruiter you're spraying and praying. No mention of the company's mission, recent news, or specific challenges means no connection.

Fix: Spend five minutes on the company's website and LinkedIn page. Reference something specific — a recent product launch, a company value that resonates with you, or a challenge their industry faces. Show you understand who they are and why you want to work there.

5. Focusing on What You Want Instead of What You Offer

"I'm looking for an opportunity to grow my career" is about you. The hiring manager wants to know what you'll do for them. Cover letters that read like wish lists rather than value propositions miss the mark entirely.

Fix: Flip the framing. Instead of "I want to develop my leadership skills," write "I'll bring five years of team management experience and a track record of reducing turnover by 25%." Lead with the value you deliver.

6. No Call to Action

Ending with "I look forward to hearing from you" is passive and forgettable. It puts all the initiative on the hiring manager and gives them no reason to act now.

Fix: Close with a confident, specific call to action: "I'd welcome the opportunity to discuss how my experience scaling SaaS onboarding can support your Q3 growth goals. I'm available for a conversation this week or next." Be direct without being pushy.

7. Typos and Grammatical Errors

A single typo in your cover letter can disqualify you. It signals carelessness — and if you can't proofread a 300-word letter, hiring managers wonder how you'll handle detail-oriented work on the job.

Fix: Read your cover letter out loud. Use a grammar checker, then have a friend review it. Pay special attention to the company name, the hiring manager's name, and the job title. Getting these wrong is an instant rejection.

8. Using the Wrong Tone

Being overly formal ("I humbly submit my candidacy for your esteemed consideration") or too casual ("Hey! I'd be awesome at this job!") creates a disconnect. Neither extreme sounds like a real professional.

Fix: Match the company's culture. Read their job posting, website copy, and social media to gauge their tone. A startup will appreciate a conversational approach; a law firm expects polish. When in doubt, aim for professional but warm — the way you'd speak in a first meeting with someone you respect.

According to a 2026 ResumeGo study, job applicants who submitted tailored cover letters were 50% more likely to receive an interview callback than those who applied without one or used a generic template.

Don't Let Your Cover Letter Hold You Back

A great cover letter can be the difference between landing an interview and getting lost in the pile. If you're not sure whether your cover letter is helping or hurting, our professional writing team can craft a compelling, personalized cover letter that complements your resume and gets results.