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Get my free resume reviewKey takeaways
- Resume mistakes are the small, fixable errors that get qualified applicants rejected in the first seconds of screening.
- The 15 mistakes in this guide fall into four groups, content, formatting, ATS, and language, and each one has a quick fix.
- Fix the highest-impact problems first: tailor to the job, show results, match keywords, and proofread.
- Run your resume through our free ATS resume checker before you apply.
Resume mistakes are the small, fixable errors that get otherwise qualified applicants rejected in the first seconds of screening. Most are easy to correct once you know what to look for, and every one of them is avoidable.
This guide covers the 15 most common resume mistakes to avoid, grouped into content, formatting, ATS, and language, with a quick fix for each. For the full process, see our guide on how to write a resume.
The content mistakes that hide your value
Content mistakes hurt most because they hide your value: listing duties instead of results, skipping tailoring, getting the length wrong, including irrelevant details, and stretching the truth.
| Mistake | Why it hurts | Quick fix |
|---|---|---|
| 1. Listing duties instead of results | Tells recruiters what the job was, not what you achieved | Add a result or number to every bullet (see resume bullet points) |
| 2. Sending the same resume to every job | Misses the keywords and priorities of each posting | Spend 10 minutes matching your summary, skills, and top bullets to each posting |
| 3. Getting the length wrong | Padded or cramped resumes are harder to scan | Aim for one page, or two with 10+ years of experience (see how long a resume should be) |
| 4. Including irrelevant or outdated details | Buries your best proof under filler | Cut old jobs, hobbies, objectives, and “references available upon request” (see references on a resume) |
| 5. Stretching the truth | Background checks and interviews expose it | Keep titles, dates, and numbers accurate, and explain any gap briefly (see employment gaps on a resume) |
Formatting that makes recruiters skim past
Avoid overdesigned layouts, hard-to-read fonts, inconsistent styles, and unnecessary personal details such as a photo. Plain, consistent formatting is easier to scan and safer in ATS.
| Mistake | Why it hurts | Quick fix |
|---|---|---|
| 6. Overdesigned layouts | Columns, icons, graphics, and skill bars can confuse ATS and distract readers | Use a clean single-column layout with standard section headings |
| 7. Hard-to-read fonts and cramped margins | Tiny text and dense blocks get skipped | Use a standard 10 to 12 point font and margins of 0.5 to 1 inch |
| 8. Inconsistent formatting | Mismatched dates, bullets, and fonts look careless | Choose one style for dates, bullets, and bold text, and apply it everywhere |
| 9. A photo, extra personal details, or an unprofessional email | A photo can raise bias concerns, and a silly email address undermines a strong first impression | Leave off the photo, age, and full address, and use a professional email address |
“Most rejected resumes do not fail because the candidate is unqualified. They fail because the proof is hard to find in the first few seconds. Fix the mistakes that hide your proof.”
ResumeCroc resume team
ATS traps that quietly shut you out
The ATS mistakes that block you are missing keywords, layouts and files the software cannot read, and creative section headings. Applicant tracking systems screen your resume before a recruiter does.
| Mistake | Why it hurts | Quick fix |
|---|---|---|
| 10. Missing the posting’s keywords | ATS matches the skills, titles, and tools in the job description | Mirror the posting’s exact terms wherever they are honestly true |
| 11. Layouts and files ATS cannot read | Tables, text boxes, images, headers, and footers can hide your text | Keep key details in plain body text, and submit the file type the posting requests |
| 12. Creative section headings | A heading like “My Journey” confuses parsers looking for “Work Experience” | Use standard headings: Summary, Experience, Education, and Skills |
Not sure how your resume reads to software? Test it with our free ATS resume checker for a score and a list of missing keywords.
Wording that makes you sound generic
Typos, buzzwords, weak openers, and mixed tenses weaken a resume because they make your writing look careless and generic. Precise, active, error-free language builds trust quickly.
| Mistake | Why it hurts | Quick fix |
|---|---|---|
| 13. Typos and grammar errors | Signal carelessness, and spell check misses real-word errors | Proofread in three passes, and ask someone else to read it |
| 14. Buzzwords and weak openers | “Hard worker,” “team player,” and “responsible for” tell a recruiter nothing | Replace them with specific verbs and results (see action verbs for resume) |
| 15. Mixed tenses and first person | Switching tenses and writing “I” make bullets clumsy | Use past tense for old jobs, present tense for your current one, and drop “I” |
Five mistakes in the wild, before and after
In a real resume, these mistakes show up as vague summaries, duty-only bullets, mismatched dates, creative headings, and unprofessional contact details. The table shows five common examples and their fixes.
| Where | Mistake | Fixed version |
|---|---|---|
| Summary | Hard-working team player seeking a challenging position | Operations coordinator with 6 years in logistics, known for cutting delivery delays and training new staff |
| Bullet | Responsible for emails and scheduling | Managed calendars and inboxes for 4 executives, cutting scheduling conflicts by 25% |
| Section heading | My Career Journey | Work Experience |
| Dates | Jan 2021, 03/22, Spring 2023 | Jan 2021 to Mar 2022, Apr 2022 to Present |
| Email address | A nickname plus a birth year, like coolguy1992 | firstname.lastname |
Every figure above is illustrative. Use your own real numbers, never someone else’s.
Audit your own resume in 30 minutes
To audit your resume, skim it like a recruiter, compare it to the job posting, check the formatting, run an ATS test, and proofread in three passes. Set aside about 30 minutes.
Skim it like a recruiter
Zoom out or print it, then give it six to seven seconds. Can you spot your job title, your employers, and one strong result?
Do: name, title, and top result visible at a glance · Not: a wall of text with no clear focus
Compare it to the job posting
Highlight the posting’s must-have skills and check that each one appears in your resume where it is honestly true. Add what is missing and real.
Do: use the posting’s phrase “inventory control” where true · Not: hoping the recruiter connects the dots
Check the formatting
Confirm one font, consistent dates and bullets, standard headings, and a clean single column. Remove anything decorative.
Do: one style for every date and bullet · Not: three fonts and mixed date formats
Run an ATS test
Paste your resume and the posting into our free ATS resume checker to get a score and a list of missing keywords.
Do: add the top missing keywords you can honestly claim · Not: stuffing in keywords you cannot back up
Proofread in three passes
Read it aloud, read it line by line from the bottom up, then ask another person to read it. Check names, numbers, and dates twice.
Do: read aloud, then bottom up, then ask a second reader · Not: one quick look on the way out the door
The usual suspects, and what to fix first
The most common resume mistakes are listing duties instead of results, sending the same resume to every job, cluttered formatting, missing keywords, and typos. Fix these first and you remove most of the reasons recruiters move on.
The 15 mistakes above fall into four groups. Work through them in this order for the fastest improvement.
What to fix first when time is short (illustrative priority)
Start at the top for the biggest gains. The ranking is directional guidance, not a measured statistic.
Illustrative editorial ranking by the ResumeCroc resume team, not a measured statistic.
Stop the same mistakes from creeping back
Keep one master resume with everything in it, make a tailored copy for each application, and run the same short checklist before you send. A repeatable routine beats a one-time cleanup.
- Maintain a master resume. Store every job, bullet, and skill in one file, then trim a copy for each posting.
- Use a pre-send checklist. Check keywords, dates, formatting, and contact details every time.
- Save the posting. Keep a copy of each job description so you can review it before an interview.
- Re-audit quarterly. Update your results and skills every few months, even when you are not job hunting.
Mistakes are fixable, but credibility problems run deeper. For doubts that go beyond simple errors, read our guide to resume red flags that get you rejected, or let our resume writing service do the fixing for you.
Find the mistakes before a recruiter does
Paste your resume and a job description into our free checker for an instant ATS score, the keywords you are missing, and prioritized fixes, all in your browser, nothing uploaded.
Frequently asked questions
What is the biggest resume mistake?
The biggest mistake is sending a generic resume of duties instead of results tailored to the job. A resume that shows no achievements and does not match the posting’s keywords gets skipped, however qualified you are.
Can typos really get a resume rejected?
Yes. Many recruiters treat typos as a sign of poor attention to detail, and one error can be enough to move on when many applicants compete. Proofread in several passes, and ask someone else to check.
Should I put a photo on my resume?
In the U.S., generally no. A photo can raise bias concerns, and many employers prefer not to receive one. Some countries and fields, such as acting or modeling, expect a headshot, so follow local norms.
Is a resume that is too long a mistake?
It can be. A padded resume buries your best proof, while a cramped one is hard to read. Aim for one page, or two with about 10 or more years of relevant experience. See our guide on how long a resume should be.
How do I proofread my resume?
Read it aloud, read it line by line from the bottom up, then ask someone else to read it. Check names, dates, and numbers twice. Print it or change the font to see it with fresh eyes.
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