How ATS screening works

What is an applicant tracking system?

An ATS is the software an employer uses to post jobs, collect applications and move candidates through hiring stages. When you click Apply on a company's careers page, the form you fill in usually belongs to their ATS, such as Lever, Greenhouse, Workday, Ashby or SmartRecruiters.

Think of it as a database with a workflow on top. It is not one robot reading every résumé and deciding your fate. What it does depends heavily on how each employer has configured it and how its recruiters use it.

What happens to your application, step by step

1. You submit the form. Your answers to each field are saved exactly as entered, and your résumé file is stored.
2. The résumé is parsed. The ATS extracts text and tries to fill structured fields: name, contact details, job titles, employers, dates, education, skills.
3. Rules run. If the employer added knockout questions or required fields, those are checked. Some systems move failing candidates to a rejected or "not qualified" stage automatically.
4. You land in a pipeline. Your profile appears in the job's list of applicants, usually in a first stage like "New" or "Applied".
5. A recruiter reviews. They scroll the list, open profiles, search for keywords, apply filters, or sort by any score the system provides.
6. You are moved or rejected. A recruiter advances you to a screening call or marks you as rejected. Many systems send an automatic email at this point.

Each step is covered below, with what it means for how you apply.

Résumé parsing: where formatting actually matters

Parsing is the step most people worry about, and it is the one where formatting genuinely has an effect. The parser reads the text in your file and guesses which part is a job title, which is a company and which is a date. When it guesses wrong, your profile can show a blank work history or a scrambled skills list, even though the original file looks fine.

Things that commonly confuse parsers

• Text inside images, logos or icons, which can't be read at all.
• Two-column or table-based layouts, where lines from both columns may be merged.
• Contact details placed only in the header or footer of the document.
• Unusual section names ("Where I've been" instead of "Experience").
• Dates in inconsistent formats, or missing entirely.

A single-column layout, standard headings, plain bullet points and consistent dates (for example, "Mar 2022 to Present") parse reliably. PDF and Word (.docx) files both usually work, provided the PDF contains real text and not a scanned image.

Recruiters often open the original file as well as the parsed profile, so the document still needs to look good to a person. Clean and simple serves both.

Knockout questions: the real automatic filter

If anything in an ATS rejects people without a human looking, it is usually a knockout question, not a résumé scan. These are questions on the form with a required answer, set by the employer. Typical examples:

• Are you legally authorised to work in this country?
• Will you now or in the future require visa sponsorship?
• Do you have at least five years of experience in this field?
• Are you willing to work on-site three days a week?
• Do you hold a valid driving licence?

Answering one of these the "wrong" way can move you straight to a rejected stage. That is why careless dropdown answers are one of the most common ways to lose a role you were qualified for. It is also why you should never answer dishonestly to get through: the answer is stored on your application and will be checked later.

Right-to-work questions deserve particular care. Our guide to work authorisation and sponsorship questions explains how to answer them accurately in different situations, and how to answer screening questions covers the rest.

Recruiter search and filters

Once applications are in, recruiters often handle large volumes by searching and filtering rather than reading everything top to bottom. Common methods include:

Keyword search is the reason tailoring helps. If the posting says "customer success" and your résumé only says "client relationships", a search for the posting's term may not find you. Tailoring means using the employer's wording for experience you actually have, not stuffing in words you can't back up. The method is in how to tailor your résumé for each job.

Applying early also matters on many teams. Recruiters often start reviewing as soon as applications arrive, and some postings close once enough strong candidates are in the pipeline.

Does the ATS rank candidates?

Some do. A number of ATS products and add-ons now offer match scores or AI-assisted ranking that compares a candidate's profile to the job description. Whether a given employer has switched this on, and how much their recruiters rely on it, varies a great deal and isn't visible to you as an applicant.

Where ranking exists, it generally rewards the same things a human reviewer would: relevant job titles, matching skills, appropriate seniority and the right location. There is no public, reliable way to game it, and tricks such as hiding keywords in white text are easy to spot when a recruiter opens the file.

Common ATS myths

What this means when you apply

1. Use a clean, single-column résumé with standard headings and real text.
2. Mirror the posting's wording for skills and titles you genuinely have.
3. Answer every knockout question accurately, and double-check dropdowns.
4. Keep your answers consistent across applications so nothing contradicts your résumé.
5. Apply while postings are fresh rather than weeks later.

Applysent works inside this process rather than around it. It tailors your résumé to each posting's wording without adding experience you don't have, fills in the employer's own ATS form with the right-to-work and notice answers you gave once in onboarding, and keeps a receipt of every field it submitted. It is live on Lever, SmartRecruiters, Ashby, Workable, Recruitee, Greenhouse, Workday, Oracle Recruiting Cloud, Teamtailor and JazzHR today; see the pages for Lever, Greenhouse and Workday for how forms on each system look.

Frequently asked questions

Do ATS systems automatically reject résumés?

They can, mainly when an employer sets knockout questions or required criteria and a candidate's answer doesn't meet them. Most other rejections are made by a recruiter working inside the ATS.

Is it true that 75% of résumés never reach a human?

That number is widely repeated but has no verifiable published source. Treat it as a myth and focus on accurate answers and a clear, relevant résumé.

Is PDF or Word better for an ATS?

Both usually parse well if the file contains real, selectable text and a simple layout. Avoid scanned PDFs and résumés built from images or text boxes.

How do I know which ATS a company uses?

Look at the web address of the application form after you click Apply; it often contains the ATS name, such as lever.co or myworkdayjobs.com. The form's layout is another clue.

Can I beat the ATS with keywords?

Using the posting's wording for skills you have helps recruiters find you in searches. Stuffing in keywords you can't back up, or hiding them, tends to backfire once a person reads the résumé.