If you’ve looked for a job recently, you’ve probably heard that “the ATS” is the enemy: a robot that reads your resume, finds it wanting and throws it away before a human ever sees it. The reality is less dramatic and more useful to understand. Once you know what these systems actually do, it’s much clearer what to change, and what to stop worrying about.

What an ATS is

An applicant tracking system is the software an employer uses to run hiring. It posts jobs, collects applications, stores candidate records, moves people through stages like “screen” and “interview”, schedules calls and sends emails. Workday, Greenhouse, Lever, iCIMS, SAP SuccessFactors and Oracle’s Taleo are some of the names you’ll see in the address bar when you apply.

Large employers almost all use one. Jobscan’s 2026 analysis found a detectable ATS at 97.4% of Fortune 500 companies, with Workday the most common, at over 40% (Jobscan). Smaller companies use them too, though that study doesn’t cover them.

The important thing to understand is that an ATS is mainly a database and a workflow tool for recruiters. It isn’t one single “algorithm” that reads every resume the same way. What happens to yours depends on the system and, above all, on how a particular employer has set it up.

What happens after you click “Apply”

The details vary, but most applications go through roughly these steps.

1. Your file is stored

Your resume is attached to a new candidate record, together with anything you typed into the application form.

2. Your resume is parsed

The system extracts the text from your file and tries to sort it into fields: name, contact details, job titles, employers, dates, education and skills. This is called parsing. It’s how the system fills in the “autofill from resume” form you often see after uploading.

Parsing is where formatting matters. Parsers read text, in order. Two-column layouts, text boxes, tables, icons and text inside images can come out jumbled or missing. Contact details placed in the document header are sometimes skipped. A scanned resume, which is a picture of text, may yield nothing at all.

3. You join the list for that job

Your record lands in the job’s pipeline, usually sorted by application date. A recruiter or hiring manager opens that list and starts reviewing.

4. Screening questions may filter you

This is the part of the process most likely to remove an application automatically, and it has nothing to do with your resume’s wording. Many applications include “knockout” questions set by the employer: Are you authorized to work in this country? Do you have the required license? How many years of experience do you have with X? If an answer doesn’t meet the employer’s requirement, the system may set your application aside.

Answer these accurately. They’re usually about genuine requirements.

5. Recruiters search and filter

With hundreds of applications for some roles, recruiters often search and filter rather than read every resume top to bottom. They might search for a job title, a tool or a certification, or filter by location. Your resume shows up in those searches only if it contains the words they type.

This is the real reason keywords matter. Not because a robot scores you and rejects you, but because a person searching for “customer onboarding” won’t find a resume that only says “helped new clients get set up”, even if it’s the same work.

6. Some systems suggest matches

Some ATS products now include features that rank or highlight candidates who appear to match the job. How these work varies a lot between vendors and isn’t usually public, and employers choose whether to use them. Where they exist, they typically lean on the same things as recruiter searches: relevant titles, skills and experience, stated clearly.

7. A person decides

Eventually, someone reads your resume. In most hiring processes, the decision to move you forward or not is made by a recruiter or hiring manager, not by the software.

About that “75% of resumes are rejected” statistic

You may have read that three quarters of resumes are automatically rejected by an ATS before anyone sees them. That figure is repeated everywhere, but it has been traced back to a 2012 marketing pitch from a company that sold resume optimization services, and no method or data behind it was ever published (HiringThing, IT Brief).

That doesn’t mean the system is irrelevant. It means the realistic risks are different from the myth: a resume that parses badly, screening questions answered carelessly, or a resume that never comes up when a recruiter searches.

What actually helps

Make your resume easy to parse

  • Use a single-column layout with standard section headings: “Experience”, “Education”, “Skills”.
  • Put your name, email and phone number in the main body at the top, not in the header or footer.
  • Avoid putting important text in images, text boxes, tables or graphics.
  • Write dates consistently, such as “Mar 2021 – Present”.
  • Use a common font and submit the file type the application asks for. When there’s no instruction, a text-based PDF or a Word file are both widely accepted.

Use the job’s language for your real experience

Read the posting and note the exact terms it uses for skills, tools and responsibilities. Where you’ve genuinely done that work, use those terms. If the posting says “QBRs” and you run quarterly business reviews, say “quarterly business reviews (QBRs)”. Our guide on how to tailor your resume to a job description walks through this step by step.

Don’t paste in keywords you can’t back up, and don’t hide the job description in white text. Recruiters see the same resume you sent, and anything that looks like gaming the system costs you credibility with the person who matters.

Fill in the application carefully

Retype anything the autofill gets wrong, answer screening questions accurately, and attach the version of your resume you tailored for this job.

A two-minute test you can do now

Want to know roughly what a parser sees? Open your resume PDF, select all the text, copy it and paste it into a plain text editor.

  • If the text comes out in a sensible order (name, contact details, then each section), you’re in good shape.
  • If columns are interleaved, sections are out of order or chunks are missing, a parser may struggle in the same way.

You’ll also learn a lot from the next application form that offers to autofill from your resume. Whatever lands in the wrong field is a hint about what to simplify.

The bottom line

An ATS is a filing system with a search box, plus whatever rules an employer configures. Make your resume easy for it to read, answer its questions honestly, and describe your experience in the words the employer is searching for. Then the person on the other end can do their job: notice that you fit.

If you’d like to see how your resume reads against a specific posting, Seamhire’s free ATS check gives you a match score, the keywords you’re missing and the formatting issues worth fixing.