Having a great resume isn't enough if it never passes the automated filter. ATS (Applicant Tracking Systems) automatically reject over 75% of resumes they receive — many of them from perfectly qualified candidates. The difference isn't talent. It's optimization.
This guide goes straight to the concrete changes you can make today to meaningfully increase your chances of clearing the filter.
1. Tailor keywords to each job posting
This is the highest-impact change — and the one most candidates ignore. ATS looks for matches between the words in your resume and the words in the job description. No match, no pass, even if you have exactly the experience they're asking for.
The process:
- Read the job posting fully and identify repeated terms: technical skills, tools, certifications, methodologies.
- Check whether those terms appear in your resume. If you have the experience but describe it differently, update the language.
- Add missing keywords in sections where you genuinely have that experience. Don't fabricate — ATS filters, but interviews expose.
Practical example: if the posting says "experience with agile methodologies and Scrum sprints" and your resume says "worked in an iterative development environment," the ATS may not connect them. Update to: "project management using Scrum and agile methodologies."
2. Optimize format so the parser reads it correctly
ATS extracts text from your resume before analyzing it. If the format makes that extraction difficult, it loses information and your score drops — even if the content is strong.
- Single column: two-column resumes confuse the parser because it doesn't know what order to read the content. Left and right columns get mixed together into incomprehensible text.
- No tables for layout: use line breaks and spacing, not table cells. Tables are poorly read by many ATS platforms.
- No text inside images or text boxes: ATS can't read content inside graphic elements. If you put your skills in icons or visual bars, the system won't register them.
- Standard fonts: Arial, Calibri, Times New Roman, Georgia. Decorative or uncommon fonts can generate garbled characters when parsed.
3. Use section headings ATS recognizes
ATS systems are programmed to look for sections with specific names. Creative section titles may prevent the system from correctly categorizing your information.
| Avoid | Use instead |
|---|---|
| My Journey | Work Experience |
| What I Know | Skills / Core Competencies |
| Academic Background | Education |
| Certificates & Courses | Certifications |
| About Me | Professional Summary / Profile |
4. Include both the acronym and the full term
Some ATS systems search for exactly what's in the job posting. If the posting says "Customer Relationship Management (CRM)" and your resume only says "CRM," the system may not find it. Include both forms when relevant:
- "Experience with CRM tools (Customer Relationship Management)"
- "PMP (Project Management Professional) certified"
- "SEO (Search Engine Optimization) and paid media campaigns"
5. Contact information: where and how
Many candidates put their details in the document header (Word or PDF header section). The problem: some ATS platforms don't read content inside headers. Result: your resume appears in the system with no email or phone number.
Solution: always put your contact details in the body of the document, in the first visible section. A visual header is fine for aesthetics, but duplicate critical information in the body.
6. Consistent date format
ATS automatically calculates your total experience based on dates. Inconsistent or ambiguous formatting can cause miscalculation — or no calculation at all.
Use the same format throughout your resume:
- ✓ January 2021 – March 2024
- ✓ 01/2021 – 03/2024
- ✗ 2021-2024 (ambiguous: full period? start and end?)
- ✗ Jan '21 – Mar '24 (abbreviations not always recognized)
7. Save in the right format
- .docx: the most compatible format with all ATS. Always a safe choice.
- PDF from Word or Google Docs: compatible if the PDF is text-native (generated from a word processor, not scanned).
- Scanned or image-based PDF: never. ATS can't extract text from an image.
- Other formats (.pages, .odt): avoid unless the posting explicitly requests them.
Verify the result before submitting
The best test is comparing your resume against the specific job posting — checking what keywords are missing, which sections are well covered, and what your estimated match score would be. Doing this manually takes time; doing it with AI takes seconds.