This one’s uncomfortable because most people don’t realize they’re making these mistakes.
They assume:
- “ATS is broken”
- “Recruiters are lazy”
- “The market is terrible”
Sometimes that’s true.
But a huge percentage of resumes are getting rejected for preventable, mechanical reasons. Not skill gaps. Not competition. Formatting and structure errors that knock you out before anyone reads a word.
If you want to understand why these mistakes matter, start with How ATS Systems Actually Work.
Here are the eight biggest ones we see - and how to fix them.
1. Two-column layouts
This is the fastest way to sabotage your resume.
Two columns look clean to humans and disastrous to ATS.
Why?
- ATS often reads left-to-right, row by row
- Content from the right column gets mixed into the wrong fields
- Dates, titles, and companies detach from each other
We’ve seen resumes where:
- Job titles appeared as bullet points
- Dates attached to the wrong employer
- Skills were scattered randomly
Do this: Single column. Always.
Not that: Sidebars, split layouts, or “modern” templates from Canva.
If your resume requires design software, it’s probably not ATS-safe.
See our ATS-Friendly Resume Formatting Guide for the full safe-format checklist.
2. Creative section headers
ATS doesn’t admire your personality.
It looks for expected labels.
When you rename sections, you introduce ambiguity - and ambiguity kills parsing.
Safe headers:
- Work Experience
- Professional Experience
- Education
- Skills
Risky headers:
- My Journey
- What I’ve Done
- How I Add Value
- Career Highlights
If the system can’t confidently identify a section, it may ignore it entirely.
Yes, including your skills.
3. Icons, graphics, and visual indicators
ATS can’t read pictures.
That means:
- Skill icons = invisible skills
- Charts = ignored content
- Logos = wasted space
Progress bars, star ratings, and “skill meters” are especially bad.
Humans barely trust them. ATS doesn’t see them at all.
Do this: Plain text. Bullet points.
Not that: Visual skill scales or graphical timelines.
This is a resume, not a slide deck.
4. Overdesigned PDFs
PDFs aren’t the enemy.
Bad PDFs are.
Problems happen when:
- PDFs come from design tools
- Text is flattened into images
- Layers overlap
- Fonts aren’t embedded properly
ATS may:
- Skip entire sections
- Merge unrelated text
- Drop content completely
Do this: Build in Word or Google Docs. Export to PDF.
Not that: Design in InDesign, Canva, Figma, or Illustrator.
If the text isn’t selectable, ATS probably can’t read it.
5. Keyword dumping with no context
This used to work.
It doesn’t anymore.
Modern ATS systems look at where keywords appear, not just whether they exist.
A skills section full of buzzwords with no supporting experience looks fake.
Bad:
Skills: Python, SQL, Agile, Leadership, Communication
Better:
Used SQL and Python to analyze customer data and automate weekly reporting
Same keywords. Completely different signal.
For the right way to use keywords, see Keywords That Matter: ATS Optimization.
6. Inconsistent or unclear dates
ATS systems rely on patterns.
When dates are inconsistent, the system struggles to build a timeline.
Common issues:
- Mixing formats (Jan 2022 vs 01/2022)
- Missing months
- Vague ranges (“2021-2023”)
That can lead to:
- Inflated gaps
- Overlapping roles
- Misread tenure
Do this: Pick one format and use it everywhere.
Not that: Creative or intentionally vague dates.
You’re not hiding anything. You’re just confusing the parser.
7. File names that scream “unprofessional”
This one sounds minor. It’s not.
Recruiters see file names. ATS stores them.
And yes, people judge.
Do this: FirstName_LastName_Resume.pdf
Not that: Resume_FINAL_v8_USE_THIS_ONE.pdf
It’s a small thing, but small things compound.
8. Submitting scanned or image-based PDFs
This is the most catastrophic ATS error — and many candidates don’t even realize they’re making it.
If your PDF was created by scanning a paper document, the entire file is just an image. ATS sees a blank page.
How to check:
- Open your PDF
- Try to select text
- If you can’t highlight individual words, ATS can’t read them either
Do this: Build your resume digitally in Word or Google Docs. Export to PDF.
Not that: Scan a printed resume or screenshot your resume into a PDF.
If text isn’t selectable, your resume is invisible to every ATS system.
The pattern behind all these mistakes
Most ATS failures come from:
- Trying to stand out visually
- Trying to be clever instead of clear
- Prioritizing design over structure
ATS rewards boring clarity.
Quick self-test
Before you apply, ask:
- Is this one column?
- Are all headers standard?
- Is everything text?
- Are dates consistent?
- Does every listed skill appear in experience?
If yes, you’ve avoided the most common instant rejections.
Clear the mechanical landmines first. Then the real competition starts.
Skip the manual check. Upload your resume to Resumes Coach and get an instant ATS compatibility report with specific fixes for each issue.