Over 98% of Fortune 500 companies and the majority of mid-size businesses use Applicant Tracking Systems (ATS) to filter job applications before a human ever reviews them, according to research published by Jobscan. If your resume isn't optimized for ATS, it may be automatically rejected — regardless of how qualified you are.
Quick answer: ATS software parses your resume, scores it against job description keywords, and automatically filters out anything below a threshold. To pass reliably: use a single-column layout with standard section headings, mirror the exact language from the job description, avoid tables and graphics, and keep contact information in the document body — not the header.
This guide breaks down exactly how ATS works and what you need to do to get past it.
What Is an ATS and How Does It Work?
An Applicant Tracking System is software that automatically scans, parses, and ranks job applications. When you submit your resume online, here's what typically happens:
- Parsing: The ATS extracts text from your resume and organizes it into fields — name, contact info, work experience, education, skills
- Keyword matching: It scans your resume for keywords that match the job description
- Scoring: It assigns your resume a relevance score based on how well it matches
- Filtering: Applications below a certain score threshold are automatically rejected
The recruiter often only sees applications that passed the initial ATS filter. This means a highly qualified candidate with a poorly formatted resume can be invisible.
Why Most Resumes Fail ATS Screening
The most common ATS failure points are:
- Formatting issues: Tables, columns, text boxes, and graphics confuse the parser
- Missing keywords: Your resume doesn't use the same language as the job description
- Non-standard headings: Calling your experience section "My Journey" instead of "Work Experience"
- Headers and footers: Many ATS systems can't read text placed in document headers/footers
- PDF vs DOCX: Some ATS versions parse DOCX more reliably than PDF
The 7 Rules for ATS-Optimized Resumes
1. Use a Single-Column Layout
Two-column resumes look polished to human eyes but are parsing nightmares for ATS. The system reads left to right, top to bottom — a two-column layout causes it to mix content from both columns, creating garbled text.
Do this instead: Single-column layout with clear sections.
2. Use Standard Section Headings
ATS systems are trained to recognize standard headers. Stick to these exact terms:
- Work Experience (not "Career History" or "Where I've Been")
- Education (not "Academic Background")
- Skills (not "Core Competencies" or "What I Know")
- Summary or Professional Summary (not "About Me")
3. Mirror the Job Description's Language
This is the single most impactful ATS optimization strategy. If the job posting says "project management," your resume should say "project management" — not "project coordination" or "managing projects."
Read the job description carefully and identify:
- Repeated keywords (they're high priority)
- Specific tools and technologies mentioned by name
- Required certifications or credentials listed
Use our free Job Match Analysis tool to automatically identify every keyword gap between your resume and a specific job description. For a deeper look at finding and placing keywords strategically, see our guide on resume keywords that get interviews.
4. Avoid Graphics, Tables, and Text Boxes
These elements look professional in Word but confuse ATS parsers. Anything placed in a table, text box, or as a graphic image is likely to be skipped entirely or misread.
Safe formatting elements: Bold text, bullet points (standard •), horizontal lines, standard fonts.
5. Put Contact Info in the Body, Not the Header
Contact information placed in a document header is often ignored by ATS. Put your name, phone, email, and LinkedIn URL in the main body of the document.
6. Use Standard Fonts
Stick to ATS-safe fonts: Arial, Calibri, Garamond, Georgia, Helvetica, or Times New Roman. Decorative or specialty fonts may not parse correctly.
7. Submit in the Right Format
When given a choice, submit DOCX. Some older ATS versions struggle with PDFs. If the application only accepts PDF, that's fine — but DOCX is safer when both are allowed.
How to Check Your ATS Score
You don't have to guess whether your resume is ATS-ready. Use our free Fix My Resume tool to get:
- An ATS compatibility score (0–100)
- A list of every specific issue affecting your score
- Recommendations to fix each problem
- A corrected version ready to download
ATS Keyword Optimization: The Right Way
Keyword stuffing doesn't work and can actually hurt you with human reviewers. The right approach is strategic integration:
Wrong: Listing keywords in white text or in a hidden section. Wrong: Repeating keywords unnaturally throughout the document. Right: Incorporating relevant keywords naturally into your bullet points and summary.
For example, if the job requires "data analysis" and "Python," your bullet point might read:
"Automated weekly reporting pipeline using Python, reducing data analysis time by 4 hours per week."
That sentence contains both keywords naturally, describes a real achievement, and quantifies the impact.
The ATS + Human Reviewer Balance
Here's what many candidates miss: you're optimizing for two audiences simultaneously. Your resume needs to pass ATS and impress the human recruiter who reads it next.
A resume stuffed with keywords but lacking clear achievements will pass ATS and be immediately rejected by the recruiter. The goal is a resume that reads naturally, tells a compelling career story, and contains the right keywords — in that order of priority. Your professional summary is the section that has to do both simultaneously: lead with keywords while making a compelling human case for your candidacy.
Quick ATS Checklist
Before submitting any application, verify:
- Single-column layout
- Standard section headings
- No tables, text boxes, or graphics
- Contact info in the document body (not header/footer)
- Keywords from the job description incorporated naturally
- Standard font (Arial, Calibri, etc.)
- DOCX or PDF format
- File name is professional (FirstName_LastName_Resume.docx)
Start With a Free ATS Check
Run your resume through our free ATS compatibility checker to get your score, identify every issue, and download a corrected version — no signup required.
