An ATS (Applicant Tracking System) scans 80% of resumes before a human ever sees them. A poorly formatted resume can be invisible to these systems, no matter how qualified you are. This guide covers exactly what ATS systems look for and how to optimize your resume to pass the scan.
Why ATS Formatting Matters
Most large companies use ATS software to filter resumes before they reach a recruiter. If your resume fails the scan, your qualifications don't matter. The system sees something it can't parse and moves on.
The good news: ATS-friendly formatting is straightforward once you know the rules. And it looks professional to human readers too.
Use a Single-Column Layout
Multi-column resumes, sidebars, and fancy text boxes are invisible to ATS systems. Stick to a simple, linear layout.
- Do: One column, top to bottom, left-aligned text
- Don't: Two-column layouts, text boxes, headers, footers, or graphics
- Don't: Tables for alignment (ATS can't parse them)
The most ATS-friendly approach is to design in Google Docs or Word with simple formatting, then export as PDF or DOCX.
Standard Section Headers Only
ATS systems are trained to recognize standard resume sections. Anything else gets skipped.
Always use these headers:
- Professional Summary (or Profile)
- Work Experience (or Professional Experience)
- Education
- Skills
- Certifications (optional)
Avoid creative section titles like "My Superpowers," "Notable Achievements," or "Fun Facts." ATS doesn't recognize them.
Stick to Standard Fonts
Some ATS systems struggle with decorative fonts. Keep it simple and readable.
Safe font choices:
- Calibri (ideal)
- Arial
- Times New Roman
- Helvetica
Font sizes: 11pt for body text, 12-14pt for section headers. Avoid anything smaller than 10pt.
Keywords Are Everything
ATS systems scan for keywords from the job description. If your resume uses the same language as the job posting, you rank higher.
How to optimize: Copy the key skills and responsibilities from the job posting into your resume (where they're truthful).
- Job posting says: "Experience with Python and machine learning"
- Your resume should say: "Python development and machine learning model training"
Match the exact terminology where possible. "PyTorch" isn't the same as "Torch" to an ATS system.
Action Verbs and Quantified Results
Start each bullet with a strong action verb and back it up with numbers.
Weak: "Responsible for improving customer retention"
Strong: "Increased customer retention by 23% YoY through personalized outreach campaigns"
ATS systems reward specificity. Percentages, dollar amounts, and time periods all signal real impact.
Avoid Tables, Graphics, and Special Characters
Some ATS systems can't parse:
- Tables and borders
- Bullet points created with special characters (use actual bullets)
- Graphics, logos, or photos
- Colored text (ATS sees it as metadata)
- Headers and footers (ATS often skips these)
Keep contact info and key details in the body of the resume, not in a header or footer where ATS might miss them.
The ATS-Safe Resume Checklist
- Single column, clean left alignment
- Standard section headers only (Professional Summary, Work Experience, Education, Skills, Certifications)
- Calibri or Arial, 11pt body / 12-14pt headers
- Keywords from the job description woven throughout
- Quantified achievements with strong action verbs
- No tables, graphics, colored text, or special formatting
- Contact info in the body (not header/footer)
- Consistent formatting top to bottom
Follow these rules and your resume will pass the ATS scan. Follow them well, and you'll rank highly.