An applicant tracking system is software employers use to collect applications, store resumes and move candidates through hiring. Recruiters often search and filter applicants in it by keywords and screening questions.

What are ATS keywords?

The specific skills, tools, certifications, job titles and domain terms from the job posting. Including the ones that are true for you, in the employer's wording, makes your resume easier to find and match.

Does an ATS automatically reject resumes?

It depends on the system and how the employer configures it. Knock-out screening questions are a common automatic filter, and many recruiters search or sort by keywords. No single rule applies to every ATS.

What resume format is best for an ATS?

A simple one-column layout with standard headings, real text (not images), contact details in the body, and a DOCX or text-based PDF file.

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ATS keywords explained: what applicant tracking systems look for

By the PaperChore team · Updated Oct 15, 2026

The short answer

An applicant tracking system (ATS) is the software employers use to collect applications and manage hiring. Many let recruiters search and filter applicants by keywords and screening questions, and how they rank or filter depends on the product and how the employer set it up. The keywords that matter are the skills, tools, certifications and job titles in the posting. Use the ones that are true for you, in plain text, in a simple layout.

What an ATS actually does

Think of it as the employer's inbox and database for applicants. It stores your resume and answers, turns the resume into fields (name, jobs, dates, skills), and lets the recruiter search, filter, tag and move people through stages. Some systems add knock-out questions ("Are you authorized to work in...?", "Do you have a CDL?") or a match score. Every product works differently, and employers configure them differently. Be skeptical of anyone who claims to know exactly how "the ATS" scores you.

Which keywords matter

Hard skills and tools: "SQL", "QuickBooks", "Salesforce", "forklift", "payroll".
Certifications and licenses: "CPA", "RN", "PMP", "ServSafe".
Job titles: the title in the posting, if it matches what you did.
Domain terms: "accounts payable", "patient intake", "B2B SaaS".

Soft skills ("team player") matter much less as keywords. Show them through examples instead.

How to use them honestly

List the posting's hard requirements and the terms it repeats.
For each term that's true for you, make sure it appears in your bullets, where you show using it, not only in a skills list.
Match their spelling and include both forms of acronyms once: "Certified Public Accountant (CPA)".
If your title was different but the work was the same, keep your real title and describe the work in their terms.
Don't stuff. Repeating a word 15 times or hiding keywords in white text can be spotted by a human in seconds.

Formatting that stays readable

Parsing varies by system, so the safe choices are the boring ones:

One column, standard headings ("Experience", "Education", "Skills").
Real text, not images. If you can't highlight the words in the PDF, the software probably can't read them either.
Contact details in the body, not only in the page header or footer.
Simple bullets. Avoid text boxes, and avoid tables for core content.
Dates in a consistent format ("Mar 2022 – Present").
DOCX or a text-based PDF, whichever the posting asks for.

Don't forget the questions

Screening questions on the application form are often the actual filter. Answer them carefully and consistently with your resume.

Quick self-check

Paste your resume into a plain text editor. If the order and the words still make sense, a parser has a good chance too. Then compare it with the posting: does every hard requirement you meet appear in words close to theirs?

Common questions

What is an ATS?: An applicant tracking system is software employers use to collect applications, store resumes and move candidates through hiring. Recruiters often search and filter applicants in it by keywords and screening questions.
What are ATS keywords?: The specific skills, tools, certifications, job titles and domain terms from the job posting. Including the ones that are true for you, in the employer's wording, makes your resume easier to find and match.
Does an ATS automatically reject resumes?: It depends on the system and how the employer configures it. Knock-out screening questions are a common automatic filter, and many recruiters search or sort by keywords. No single rule applies to every ATS.
What resume format is best for an ATS?: A simple one-column layout with standard headings, real text (not images), contact details in the body, and a DOCX or text-based PDF file.

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