Here's a number that should keep you up at night: 75% of resumes are rejected before a human ever sees them. Between ATS filters and the average recruiter's 7-second scan, your resume faces a brutal gauntlet — and most don't survive it.
The worst part? Most rejections aren't caused by a lack of qualifications. They're caused by avoidable mistakes that signal "skip me" to both algorithms and humans.
We've reviewed thousands of resumes and tracked which errors show up most often. These are the 15 mistakes we see repeatedly — and exactly how to fix each one.
Mistake #1: Typos and Grammatical Errors
This is the most basic mistake and still the most damaging. A CareerBuilder survey found that 77% of hiring managers immediately discard resumes with typos. Not "consider discarding." Immediately discard.
It makes sense. If you can't proofread a one-to-two page document about yourself, what does that say about your attention to detail on the job?
How to fix it:
- Read your resume out loud. Your ear catches errors your eye skips.
- Run it through a grammar checker, but don't rely on one exclusively.
- Ask a friend to review it with fresh eyes.
- Print it out. People catch more errors on paper than on screens.
Common culprits: "manger" instead of "manager," inconsistent tense (mixing past and present), missing periods at the end of some bullets but not others.
Mistake #2: Using a Generic Objective Statement
"Seeking a challenging position where I can leverage my skills and experience to contribute to a dynamic team."
Sound familiar? That sentence says absolutely nothing. It tells the recruiter you want a job — which they already knew, because you applied.
How to fix it: Replace the objective with a professional summary that communicates your value. Two to three sentences covering who you are, what you do best, and what you bring to this specific role.
Before: "Seeking a marketing position where I can grow professionally."
After: "Digital marketing manager with 6 years of experience driving B2B lead generation. Increased qualified pipeline by 180% at [Company] through paid search and content marketing programs. Specialized in marketing automation and analytics."
The second version gives the recruiter a reason to keep reading.
Mistake #3: Choosing the Wrong Resume Format
A functional resume (skills-based, no chronological work history) is almost always a red flag to recruiters. It screams "I'm hiding something" — whether that's gaps, lack of experience, or frequent job changes.
How to fix it: Use a reverse-chronological format in the vast majority of cases. It's what recruiters expect, what ATS systems parse most reliably, and what best tells your career story.
The only exception: if you're making a dramatic career change and your work history is genuinely irrelevant. Even then, a hybrid format (summary plus chronological history) works better than pure functional.
Mistake #4: Missing Keywords From the Job Description
ATS systems work by matching your resume against the job posting. If the posting asks for "cross-functional collaboration" and you wrote "working with other teams," you might score a zero on that criterion — even though you have the exact skill they want.
This is where most qualified candidates get filtered out. The skills are there, but the language doesn't match.
How to fix it:
- Read the job description carefully and identify repeated terms, required skills, and specific technologies.
- Mirror their exact phrasing in your resume. If they say "stakeholder management," don't paraphrase it as "working with clients."
- Focus especially on hard skills, certifications, and tools — these are what ATS systems weight most heavily.
Tools like the ATS checker on bestdamnresume.com can scan your resume against a specific job description and show you exactly which keywords you're missing. It takes the guesswork out of optimization.
Mistake #5: Poor Visual Formatting
Dense blocks of text, inconsistent fonts, misaligned sections, random bold and italic — these formatting issues don't just look unprofessional. They actively prevent recruiters from scanning your resume during that critical 7-second window.
How to fix it:
- Use one font throughout (two at most — one for headings, one for body).
- Keep margins between 0.5 and 1 inch.
- Use consistent bullet styles and spacing.
- Ensure clear section breaks with adequate white space.
- Stick to 10-12pt font for body text.
Pro tip: Squint at your resume from arm's length. Can you still identify the major sections? If it looks like a wall of gray text, add more white space.
Mistake #6: Listing Duties Instead of Achievements
This is the single biggest difference between resumes that get interviews and resumes that don't. Duties describe what you were supposed to do. Achievements describe what you actually accomplished.
Duty: "Responsible for managing social media accounts."
Achievement: "Grew Instagram following from 5K to 85K in 14 months, driving a 40% increase in website traffic from social channels."
See the difference? One describes a job. The other describes a person you want to hire.
How to fix it: For every bullet point, ask yourself: "So what? What was the result?" Use the formula: Action verb + what you did + measurable result.
- "Managed" becomes "Managed $2.4M budget, delivering project 15% under budget"
- "Handled customer complaints" becomes "Resolved 95% of escalated customer issues within 24 hours, improving CSAT score from 3.2 to 4.6"
If you can't quantify the result, describe the impact qualitatively: scope, scale, who benefited, what changed.
Mistake #7: Including Irrelevant Experience
That summer you spent lifeguarding in college? Your part-time gig at a pizza shop? Unless you're applying for a related role or you're early in your career, it's taking up space that should go to relevant experience.
Every line on your resume should answer one question: "Does this make me look more qualified for THIS job?"
How to fix it:
- If you have 5+ years of professional experience, cut anything unrelated to your target role.
- Keep your resume focused on the last 10-15 years of relevant work.
- If you genuinely lack relevant experience, reframe older roles to highlight transferable skills — leadership, customer service, problem-solving — rather than listing every task.
Mistake #8: Submitting the Wrong File Format
You spent hours crafting the perfect resume, then saved it as a .pages file or a weirdly formatted .doc. The ATS either can't read it or mangles the formatting completely.
How to fix it:
- Submit as PDF unless the application specifically asks for .docx.
- PDF preserves your formatting across all devices and operating systems.
- If they request .docx, use a clean, simple template — complex formatting breaks when parsed by ATS systems.
- Never submit .pages, .odt, or image files (yes, people submit screenshots of their resumes).
- Name the file professionally: "FirstName_LastName_Resume.pdf" — not "resume_final_v3_REAL_final.pdf."
Mistake #9: Missing or Incomplete Contact Information
It sounds absurd, but we see it constantly: resumes with no phone number, no email, or contact info buried at the bottom of page two. Some candidates include a phone number they never answer or an email they rarely check.
How to fix it: Put your full contact information at the top of your resume, clearly visible:
- Full name
- Phone number (that you answer)
- Professional email address
- LinkedIn URL (customized, not the default string of numbers)
- City and state (full street address is no longer expected or recommended)
Double-check that your phone number and email are correct. A single transposed digit means you'll never hear back — and you'll blame the company, not your typo.
Mistake #10: Using an Unprofessional Email Address
partygirl2003@hotmail.com. gamerking420@yahoo.com. sexyback_mike@aol.com.
These are real email addresses we've seen on real resumes from real adults applying for professional jobs.
How to fix it: Create a simple, professional email: firstname.lastname@gmail.com or a reasonable variation. It takes two minutes and removes a completely unnecessary reason to reject you.
Also outdated: AOL, Hotmail, and Yahoo addresses aren't inherently disqualifying, but they can signal that you're not tech-savvy. Gmail or a custom domain is the safest bet.
Mistake #11: Employment Gaps Without Context
Gaps happen. People get laid off, take time to care for family, deal with health issues, travel, go back to school, or simply burn out. Recruiters know this.
What raises red flags isn't the gap itself — it's the unexplained gap. When a recruiter sees a missing year with no context, they fill in the worst-case scenario.
How to fix it:
- Include a brief note for significant gaps (6+ months): "Career break — primary caregiver for family member" or "Professional sabbatical — completed AWS certification and freelance consulting."
- If you freelanced, volunteered, or took courses during the gap, list them.
- Don't try to hide gaps by removing months from your dates. Recruiters notice, and it looks evasive.
- In your cover letter, you can provide more context. A tool like the cover letter generator at bestdamnresume.com can help you frame career gaps in a way that feels natural and forward-looking.
Mistake #12: Lying or Exaggerating
A HireRight employment screening report found that 36% of candidates misrepresent something on their resume. Inflated titles, fake degrees, stretched employment dates, fabricated metrics.
Here's the problem: background checks catch most of these. And even small lies that slip through can surface later and end your career. Getting fired for resume fraud is a stain that follows you.
How to fix it:
- Be honest. If your title was "Marketing Associate" but you functioned as a manager, write: "Marketing Associate (functioned as team lead for 4-person group)."
- Round numbers reasonably — "approximately $2M in revenue" is fine. Turning $500K into $5M is not.
- If your GPA wasn't great, leave it off. Nobody is requiring it after your first job.
- You can present the truth strategically without fabricating it.
Mistake #13: Resume Is Too Long or Too Short
The old "one page only" rule isn't absolute, but length still matters. A half-page resume suggests you have nothing to offer. A four-page resume suggests you can't prioritize.
General guidelines:
- 0-5 years of experience: One page.
- 5-15 years of experience: One to two pages.
- 15+ years or executive/academic roles: Two pages, occasionally three.
Research from ResumeGo found that recruiters were 2.3 times more likely to prefer two-page resumes over one-page resumes for candidates with more than 5 years of experience. The key is that every line earns its place.
How to fix it:
- If your resume is too short, you're probably listing duties instead of achievements. Expand your bullets with results and context.
- If it's too long, cut old roles, remove irrelevant details, and consolidate overlapping bullet points.
- Ask yourself: "Would I bring this up in an interview?" If not, cut it.
Mistake #14: Sending the Same Resume for Every Job
This is the mistake that connects all the others. When you blast the same generic resume to 50 jobs, you miss keywords, include irrelevant experience, and fail to speak to what each specific employer needs.
Recruiters can tell. And ATS systems definitely can tell — your match score drops when your resume isn't tailored.
How to fix it:
- Start with a strong base resume, then customize for each application.
- Adjust your summary to reflect the specific role.
- Reorder your bullet points so the most relevant achievements come first.
- Mirror the job description's language and keywords.
This doesn't mean rewriting from scratch every time. Even 15-20 minutes of targeted adjustments per application dramatically improves your hit rate. The resume tailoring tool at bestdamnresume.com can compare your resume against a job description and highlight the specific adjustments that will improve your match score.
Mistake #15: Including Outdated Information
Your resume should reflect who you are now, not who you were a decade ago.
What to remove:
- "References available upon request" — this hasn't been necessary since the early 2000s. Employers will ask for references when they need them.
- Skills in obsolete technologies (Windows XP, Dreamweaver, Lotus Notes) unless the job specifically requires legacy systems.
- Your high school diploma if you have a college degree.
- Jobs from 20+ years ago (unless they're highly relevant or prestigious).
- GPA (after your first few years of working).
- Hobbies and interests — unless they're directly relevant (e.g., "competitive public speaker" for a sales role).
- A headshot or personal details like age, marital status, or religion.
How to fix it: Do an annual audit of your resume. If something would feel strange to discuss in a 2026 interview, it probably doesn't belong on a 2026 resume.
The Compounding Effect
Here's what makes resume mistakes so dangerous: they compound. A recruiter who spots a typo is now primed to look for more problems. A generic objective sets a tone of mediocrity that colors how they read everything after it. One mistake might not kill you. Three or four together almost certainly will.
The good news is that the fixes also compound. A clean, well-formatted resume with strong achievements and tailored keywords creates a positive first impression that carries through the entire review.
Your Resume Audit Checklist
Before you submit your next application, run through this list:
- [ ] Zero typos and grammatical errors
- [ ] Professional summary instead of generic objective
- [ ] Reverse-chronological format
- [ ] Keywords mirror the job description
- [ ] Clean, consistent formatting with white space
- [ ] Achievements with numbers, not just duties
- [ ] Only relevant experience included
- [ ] Saved as PDF with a professional filename
- [ ] Complete contact information at the top
- [ ] Professional email address
- [ ] Employment gaps briefly explained
- [ ] Everything is truthful and verifiable
- [ ] Appropriate length for your experience level
- [ ] Customized for this specific job
- [ ] No outdated information or filler
If you can check every box, you're ahead of the vast majority of applicants. Most people get eliminated not because someone better applied, but because they made one of these fixable mistakes.
Stop Guessing, Start Testing
The frustrating thing about resume mistakes is that you often don't know they're there. You can't see what the ATS sees. You don't know which keywords you're missing. You might not realize your formatting breaks when parsed by screening software.
That's why we built bestdamnresume.com. Upload your resume, paste a job description, and get a clear score with specific, actionable fixes. See which keywords you're missing, which formatting issues might trip up ATS systems, and how your resume stacks up before you hit submit.
Your qualifications got you this far. Don't let a fixable mistake be the reason you don't get the interview.