What Is an ATS and Why Do 75% of Resumes Get Rejected?

If you've been applying to jobs and hearing nothing back, your resume might be getting filtered out before a human ever sees it. This isn't about your qualifications — it's about Applicant Tracking Systems (ATS), and they're rejecting up to 75% of resumes automatically.

What is an ATS?

An Applicant Tracking System is software that companies use to receive, sort and filter job applications. When you apply online, your resume isn't going directly to a human recruiter — it's going into an ATS database first. The software scans your resume for keywords, qualifications and formatting, then decides whether to surface it to a human reviewer.

98% of Fortune 500 companies use ATS, and the majority of mid-size companies do too. Platforms like Workday, Greenhouse, Lever, Taleo and iCIMS are the most common ones you'll encounter.

How ATS screening works

ATS systems work in two ways: keyword matching and ranking. First, they scan your resume for exact keywords from the job description — if a JD says "stakeholder management" and your resume says "managing stakeholders", many systems won't match it. Second, they rank candidates by how closely their resume matches the JD requirements.

The systems also check for: job titles that match the role, required qualifications and certifications, years of experience, and specific tool or technology names.

5 reasons ATS rejects your resume

• Missing keywords — your resume doesn't contain the exact phrases from the job description
• Wrong formatting — tables, columns, headers in text boxes and graphics confuse ATS parsers
• Missing section headers — ATS looks for standard headers like "Experience", "Education", "Skills"
• Non-standard file format — some systems struggle with complex Word formatting; simple is better
• Lack of quantified achievements — ATS increasingly scores resumes on impact indicators

How to optimise your resume for ATS

The most important thing is keyword matching. Read the job description carefully and identify the specific terms used — then use those exact terms in your resume. Don't paraphrase: if the JD says "cross-functional collaboration", use that exact phrase, not "working across teams".

Use a clean, single-column format with standard section headers. Avoid tables, text boxes, and headers in the document margins. Save as a standard .docx or .pdf file.

For each role you apply to, tailor your resume to match the specific JD. Generic resumes perform significantly worse in ATS than customised ones.