Over 90% of large companies use Applicant Tracking Systems (ATS) to filter resumes before they reach human recruiters. Even if you're perfectly qualified for a job, these common mistakes can cause your resume to be automatically rejected. Here's what you need to avoid.

1. Using Complex Formatting

Tables, text boxes, headers, footers, and graphics may look great to humans but confuse ATS systems. Stick to simple, clean formatting with standard fonts like Arial, Calibri, or Times New Roman.

2. Missing Keywords from Job Description

ATS systems scan for specific keywords from the job posting. If your resume doesn't include relevant skills, technologies, and qualifications mentioned in the job description, it won't rank highly. Always tailor your resume to each position.

3. Using Non-Standard Section Headings

Creative headings like "Where I've Been" instead of "Work Experience" or "My Skills" instead of "Skills" can prevent ATS from properly categorizing your information. Use conventional headings that ATS systems recognize.

4. Submitting as an Image or Unsupported Format

PDFs and DOCX files are generally safe, but JPEGs, PNGs, or scanned documents cannot be parsed by ATS. Always submit your resume as a text-based file format unless specifically instructed otherwise.

5. Lack of Quantifiable Achievements

Vague statements like "Responsible for sales" don't stand out. ATS systems and recruiters prefer specific, measurable achievements like "Increased sales by 35% in Q4 2024" or "Managed team of 12 developers."

6. Using Acronyms Without Spelling Them Out

While you might know that "SEO" means Search Engine Optimization, ATS systems may search for either the acronym or the full term. Include both: "Search Engine Optimization (SEO)" on first mention.

7. Inconsistent Date Formatting

Mixing formats like "Jan 2024," "01/2024," and "January 2024" can confuse ATS parsers. Choose one date format and use it consistently throughout your resume.

8. Ignoring Job-Specific Skills

Generic resumes rarely pass ATS filters. Each job posting has specific requirements—make sure your resume explicitly addresses these skills and qualifications rather than using a one-size-fits-all approach.

9. Spelling and Grammar Errors

Typos aren't just unprofessional—they can prevent ATS from matching keywords. "Proejct Management" won't match "Project Management" in the system's search. Always proofread carefully.

10. Missing Contact Information

It sounds basic, but some candidates omit phone numbers, email addresses, or LinkedIn profiles. Even if your resume passes ATS, recruiters need a way to contact you. Include complete, professional contact information at the top of your resume.

Key Takeaways

Use simple, clean formatting without tables or graphics
Include keywords from the job description naturally
Quantify achievements with specific numbers and metrics

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10 Resume Mistakes That Get You Rejected by ATS