How Does an ATS Scan Resumes? (w/Examples) + FAQs

An ATS scans a resume by pulling out its text, sorting that text into fields like job titles and skills, then ranking it against a recruiter's keywords. A badly formatted file can hide a strong candidate before a human ever opens it.

Nearly each large employer relies on one, including 99 percent of Fortune 500 companies. That means the wording and format of your resume decide whether a recruiter ever finds your name. Small and mid-size businesses are catching up fast, so the habit matters well beyond the corporate world.

What Happens After You Hit Submit

An applicant tracking system is recruiting software that collects and stores each resume a company gets for its open jobs. The moment you submit an application online, the file rarely reaches a recruiter's inbox. It lands inside this database first. From there, the system tries to turn your resume into structured data it can search later, much like a spreadsheet turns paper into searchable rows.

The parsing engine pulls out your raw text first. Then it sorts that text into fields such as contact information, job titles, employers, dates, and skills. Older, rule-based parsers do this through pattern matching, so a predictable layout gets sorted correctly and a creative one does not. When the parser cannot tell what a section is, it often dumps that content into a field nobody searches.

This is why two people with the same experience can get very different results from one ATS. A common myth is that the system rejects weak resumes outright. The more common failure is quieter: your resume gets parsed, stored, and then never surfaces in a recruiter's search. Fixing this is less about writing a better resume and more about writing one the parser can read.

Picture a resume with a two-column layout: a skills sidebar on the left, work history on the right. A parser reads top to bottom in a single stream, so it does not see two columns. It sees one merged block of text instead. A job title from the right column can land next to a skill from the left, creating a garbled entry.

Most systems also keep your resume on file well after a job closes, sometimes for a year or more. A recruiter filling a different opening later can resurface it without you reapplying. That is a real upside of getting parsed correctly the first time. It also means one formatting mistake can quietly cost you future searches against that same stored file, not only the job you applied for.

How Recruiters Use the System to Find You

Once your resume sits inside the database, a recruiter rarely reads each resume line by line. Large companies often collect hundreds of resumes for one opening. So recruiters search the ATS much like they would search a spreadsheet, typing in a job title or a handful of required skills. A university career guide notes that some recruiters decide whether to keep reading in about six seconds, which is why your first few lines carry the most weight.

Some systems go further and rank applicants on their own. Oracle's Taleo, for example, includes a feature recruiters call Req Rank. It scores each application against the job requisition and surfaces the closest matches first. A candidate near the top of that list gets read, while one buried near the bottom often does not, no matter how qualified they are.

Many recruiters also build searches using Boolean logic, combining some required terms with AND to narrow results fast. A recruiter filling an Administrative Assistant role might search for administrative assistant AND data entry AND payroll. That combination isolates candidates with all three skills at once. If your resume is missing even one of those exact terms, a search like that can skip you fully, no matter how relevant your background is.

Third-party tools like Jobscan try to reverse-engineer this process for job seekers. They generate a match rate, a percentage score comparing your resume to one job posting. As of 2026, Jobscan weighs five factors in order: hard skills first, then education level, then job title, then soft skills, then other keywords. Word count and quantified results, the details a human reviewer cares about most, are not part of that score at all.

Not each platform scores your resume text on its own, though. One recruiter says he built the Workday scoring logic himself. He explains that a rejection often traces back to the questionnaire, not the resume, when an answer misses a required skill. That gap matters because polishing your resume will not fix a rejection a bad questionnaire answer already caused.

Which Situation Applies to You?

How much of this matters depends on who is hiring and how they use their software. A five-person startup collecting resumes by email works nothing like a bank running each resume through a full ATS pipeline. The three situations below cover most job seekers. Find the one closest to yours before you decide how much time to spend on formatting.

If You're Applying to a Large Company or Bank

Large employers almost always route resumes through a full-featured ATS, complete with its own parsing rules and search tools. Citizens Bank's hiring guide lists SmartRecruiters, Workday, iCIMS, Greenhouse, and Oracle as platforms candidates commonly meet there. In this setting, formatting discipline is not optional. A two-column resume or a fancy header can truly keep a qualified candidate out of a recruiter's search results, so treat each rule in this guide as a real requirement.

Large companies tend to keep resumes on file the longest. They fill similar roles all year. A candidate who gets parsed cleanly today can turn up again months later for an unrelated opening, without applying twice. That upside is exactly why it pays to get the formatting right before you apply somewhere this size.

If You're Applying to a Small or Growing Business

Small and mid-size employers are catching up fast. A Kelly OCG survey cited by a university career center found that roughly 35 percent of small organizations already use some recruiting software, against about two-thirds of large companies. Many of these smaller systems are simpler, sometimes little more than a form that emails a hiring manager. A resume that would get scrambled by a Fortune 500 platform might reach a person untouched at a 20-person company.

Even so, the same formatting habits are worth keeping by default. You rarely know which system, if any, stands behind a given form. Building one clean master resume that follows ATS-safe rules costs nothing at a company with no ATS at all. It still protects you at the ones that do.

If You're Changing Careers or Have Gaps in Your History

Keyword matching is hardest on people whose experience does not map neatly onto a job title. That includes career changers, veterans translating military roles, and people returning after a gap. A parser matching literal job titles and skills cannot infer that an unrelated-sounding past role taught you the exact skill a posting wants. The fix is not to hide the gap or the title mismatch; it is to spell out the transferable skill in the posting's own words.

One veteran ICU nurse wanted to relocate late in her career, but mailed resumes and online forms got no response. She switched tactics and started printing copies of her resume, then making informational-interview appointments with nurse managers. Her workaround will not scale to each industry, but it shows a real pattern worth remembering. When an ATS keeps filtering someone out on paper, reaching a human being can work better than trying to out-optimize the algorithm.

The Formatting Rules That Move the Needle

Most ATS advice boils down to one idea: give the parser a text file it can read, and worry about visual polish second. ResumeWorded's testing guidance recommends standard section titles, such as "Professional Experience" instead of a creative label like "My Career Journey." The parser is trained to recognize the common phrase, not the clever one. The same guidance favors a single-column layout and standard fonts like Garamond, Arial, or Calibri over decorative typefaces.

Contact information is one of the most common casualties. TopResume's analysis of 1,000 resumes found that ATS software failed to correctly identify a candidate's contact details 25 percent of the time when that information sat inside a header or footer. Many parsers simply skip those areas of a Word document. A name, phone number, or email placed there can vanish from the parsed record, even though a human can see it fine.

Tables, columns, and graphics cause a related problem. A parser reading in a single stream does not understand a table's grid. It can merge unrelated cells into nonsense text instead. Images and icons fare worse than tables.

A fancy phone icon next to your number often converts to a stray symbol. Sometimes it disappears completely, taking your contact information with it. Because of this, Jobscan's research on formatting consistently ranks a plain, single-column layout above anything more creative. A cleaner layout costs you nothing in visual appeal, since most modern resume templates already default to this simpler approach.

File format is the one area where sources genuinely disagree. Jobscan's own testing found that .docx files parsed more reliably than PDFs. That held true across each system it checked. It recommends Word unless a posting explicitly asks for PDF.

One recruiter who says he has hired thousands of employees pushes back hard on that advice. He insists Word docs still read as unprofessional, since he says he built his own scoring workflow around PDFs. He converts everything to PDF before he passes a resume to a hiring manager. The safest approach is to keep a clean, single-column .docx master for systems that request it, and export a text-based PDF, never a scan, whenever a posting leaves the choice open.

Different Platforms, Different Rules

Naming some ATS platforms without explaining how they differ teaches a job seeker nothing useful. The table below focuses on one question: does a platform parse and rank your resume text itself, or does it lean more on separate screening questions? Two systems that look similar on the surface can behave very differently once you know which model each one follows. The differences below change where you should spend your editing time.

You can often tell which platform a company uses by looking at the application URL. A web address containing myworkday.com points to Workday. The names greenhouse.io, lever.co, and icims.com identify those platforms clearly, too. Recognizing the platform before you apply lets you match your approach to the right row in the table above.

Understanding which model an employer likely runs changes your strategy. A ranking-heavy system like Taleo rewards a resume tuned tightly to the job description. A questionnaire-heavy system like Workday rewards careful, literal answers to each qualifying question instead. Neither model forgives a two-column layout or a header full of contact details, so the formatting rules from the previous section still apply everywhere, no matter which platform sits behind a posting.

The Old Keyword Match vs the New AI Layer

For years, ATS matching worked much like a basic search engine. It looked for exact strings of text and counted how often they appeared. That rule-based approach is why old advice still gets repeated: use the exact phrase from a job posting, spell out an acronym in full, and skip synonyms. It still works, because plenty of ATS platforms in production today have not changed how they search.

A newer layer now sits on top of that older search in a growing number of systems. TopResume's guidance notes that artificial intelligence has become an important part of how companies screen applicants. It moves beyond a literal keyword count toward something closer to matching meaning. Jobscan, a company that sells resume software, describes its own matching tool as AI-powered rather than a simple keyword counter, though that description comes from the vendor itself.

The practical difference matters, because the old advice and the new advice can point in slightly different directions. A rule-based system rewards literal repeats of the posting's exact phrase. An AI-assisted one has more room to credit a close synonym or a related skill it recognizes on its own. The safest strategy right now is to do both: use the posting's exact wording where you can, and still write in complete, natural sentences instead of a wall of repeated keywords.

A common myth is that AI screening makes the system smarter than a person at judging fit. In practice, it is still pattern matching at a larger scale. It is not a judgment of whether you can do the job. Nothing here changes the core rule from earlier in this guide: a resume the parser cannot read, in either generation of software, never gets judged at all.

It helps to separate two different uses of AI in this space. Employer-side screening decides whether your resume surfaces to a recruiter, while candidate-side tools like Jobscan use AI to advise you on edits before you apply. The two are not connected. A strong score on a candidate tool says nothing about how a specific employer's screening will treat your resume.

Worked Example: Calculating Your ATS Match Rate

Here is a walk-through you can copy for your own resume, based on the match-rate approach some ATS checkers use. Start with a real job posting and list each hard skill, tool, certification, and job-title phrase it names. A typical mid-level posting names somewhere between 15 and 25 of these. For this example, assume a posting for an Executive Assistant role names 20 distinct keyword terms, including the exact job title.

Now count how many of those 20 terms already appear in your resume, using the posting's exact wording rather than a rough synonym. If your draft resume contains 13 of the 20 terms, your match rate is 13 divided by 20, or 65 percent. Jobscan's resume-scanner tool treats 65 percent as the floor where many career counselors still see success. It recommends aiming for 75 percent when you can reach it without distorting your resume.

To close the gap, add three more missing terms naturally into your work-experience bullets and skills section. Pick the ones closest to your genuine experience. That takes you to 16 of 20 terms, or 80 percent, comfortably above the recommended target. Stop there rather than chasing each remaining term, since cramming in keywords you cannot back up in an interview creates the keyword-stuffing problem that career counselors warn against, where a resume scores well on paper but reads as padded once a person reads it.

The table below shows where those matched terms typically come from, since Jobscan's weighting does not treat each keyword category equally. Hard skills and the exact job title carry the most weight in the match rate. Generic soft skills contribute the least. Knowing that order tells you where to spend your editing time first.

Where Applications Break

The three situations below are not hypothetical. They come from patterns recruiters and job seekers report seeing over and over. Each one teaches a different lesson, so treat them as three separate checks against your own resume rather than one repeated warning. Together they cover formatting, the gap between resume parsing and questionnaire scoring, and a screening step that has nothing to do with your resume at all.

Devon's Two-Column Résumé Gets Scrambled

Devon is a marketing coordinator who built a striking two-column resume, with a skills sidebar running down the left edge. One developer who tested resume layouts against some ATS platforms found that columns get scrambled during parsing. A job title from one column can merge with a skill from another. Devon's resume looked polished to each human who saw it, and unreadable to the systems that saw it first.

The fix does not mean giving up design. It only means moving the choices a parser cannot handle out of the layout. A clean single-column structure, exported as text rather than a scanned image, survives the widest range of systems. The table below shows the swap Devon made before resending the same resume to five more postings.

Priya's Rejection Traces to a Questionnaire, Not Her Résumé

Priya applied to a large bank through its careers site, and when she heard nothing back, she assumed her resume had been rejected outright. One recruiter who builds screening logic for that kind of platform explains it differently. He says he built the Workday scoring logic himself, and a rejection often traces back to the questionnaire, not the resume, when an answer misses a required skill. If Priya had reviewed her answers to the qualifying questions instead of rewriting her resume again, she might have caught the real problem.

This distinction matters for anyone applying somewhere with a long pre-screen questionnaire. A resume can be flawless and still lose to one careless answer on a required-skills question. Read each qualifying question as carefully as you write your resume. It can end things before the parsing step ever runs.

Malik Loses Almost Half a Job's Applicant Pool to One Question

Malik's hiring team posted a hybrid role that clearly stated employees needed to be in the office on Tuesdays and Thursdays. Even so, the team kept getting candidates who said they could not commit to that schedule during the phone screen. One hiring reviewer described a nearly identical hybrid-role client whose screening question about Tuesday and Thursday office days alone knocked out almost 40% of applicants. Adding that exact question as a required field, instead of hoping candidates noticed the schedule in the posting, fixed the wasted screening time on both sides.

Knockout questions, the qualifying yes-or-no fields on many applications, work almost the same at most large employers. They filter on hard requirements like work authorization, a licensing requirement, or a location commitment. None of that depends on what the resume says. The table below shows common knockout categories and why they end things so fast.

Test Your Resume Before You Apply

Before you trust any part of this guide, run a free check on your own resume. Do not take anyone's word for it alone. TopResume's testing method is simple: copy your entire resume, paste it into a plain-text document, and read what comes out. If sections appear out of order, characters look garbled, or lines are missing, your formatting is the problem, not your experience.

A graphic designer who builds resumes in InDesign shared a trick for testing the export. Select all the text in your finished PDF, then paste it into a plain document to see exactly how the computer breaks it apart. Either method takes under two minutes and shows you precisely what a parser sees. Run it again each time you make a real layout change, not only once when the resume is finished.

Look for three things in the plain-text version: your name and contact information at the very top, your section headings intact and correctly labeled, and your job titles and dates in the same order as the formatted version. A messy result almost always traces back to one of the formatting habits covered earlier in this guide, so fix that first before you touch the wording. ResumeWorded's scanner and similar free tools go a step further, scoring your resume against a broader checklist once the manual test comes back clean. Treat the paid features of these tools as optional; the plain-text test itself costs nothing and catches most of the damage.

Run this check on each tailored version of your resume, not only the master copy. Small last-minute edits can accidentally break a heading. Swapping in a new job title or adding a skill can introduce a stray character too. A thirty-second recheck before you submit costs far less time than a resume that silently fails to parse.

Do's and Don'ts When Optimizing for an ATS

The formatting and content rules in this guide boil down to a short list of concrete actions. Some cost nothing and take minutes. Others require rebuilding a resume from scratch in a new template. Treat the list below as a working checklist, not a batch of rules to follow all at once.

Do

• Use the exact job title and phrasing from the posting in your resume headline, since literal keyword matching is still common even on newer platforms.
• Keep a clean, single-column .docx master resume, since it parses reliably across the widest range of systems tested by vendors like Jobscan.
• Label sections with standard headings such as "Work Experience," "Education," and "Skills," so the parser files your content where a recruiter looks.
• Spell out acronyms in full at least once, alongside the abbreviation, so a search for either version finds your resume.
• Read each qualifying or knockout question as carefully as your resume, since one wrong answer can end things on its own.
• Run the plain-text self-check before you submit, so you catch parsing damage before a recruiter ever does.

Don't

• Don't use a two-column layout or a resume template built on tables, since a parser reading in a single stream will scramble the content.
• Don't put your name, phone number, or email inside a header or footer, since many parsers skip those spots fully.
• Don't use decorative icons, images, or graphics anywhere on the resume, since they often convert to broken characters or vanish outright.
• Don't stuff keywords you cannot support in an interview only to raise a score, since recruiters read whatever text survives the screening.
• Don't assume PDF is always safer than Word, since testing has found the opposite is often true depending on the platform.
• Don't reuse one generic resume for each job when the posting lists specific required skills you have not mentioned.

Pros and Cons of Applicant Tracking Systems

Applicant tracking systems exist because manually reading hundreds of resumes per opening is not realistic for most hiring teams. That does not mean the software is purely good or purely bad. The effect depends on which seat you sit in. The lists below separate the genuine benefits from the real costs, for both the employer and the job seeker.

Pros

• Recruiters can search and sort large applicant pools quickly, which shortens time-to-hire for high-volume roles.
• Standardized fields make it easier to compare candidates fairly on stated qualifications rather than resume design.
• A resume can resurface for a later opening on its own, since most systems keep resumes on file for months.
• Structured screening questions can reduce reliance on someone's snap judgment of a resume's appearance.
• Employers can keep records that support consistent, defensible hiring decisions across a large organization.

Cons

• A strong candidate can be filtered out fully by a formatting or parsing error that has nothing to do with their qualifications.
• Literal keyword matching can reward resume-writing skill over actual job fit, especially on older, rule-based platforms.
• Job seekers rarely get feedback on why a resume went nowhere, which makes the process feel opaque and discouraging.
• Career changers and people with nontraditional paths are structurally disadvantaged by systems built around exact title and keyword matches.
• Re-entering the same details into a different form for each employer wastes real time for job seekers.

Mistakes to Avoid When Writing for an ATS

Most of the mistakes below show up again and again across the sources behind this guide, from vendor testing to hiring-side accounts. None are fatal on their own, but some together can bury an otherwise strong resume. Fix the ones on this list first, since they are the highest-frequency problems reported.

• Using a two-column or heavily templated layout, which scrambles into unreadable text once a parser reads it in a single stream.
• Placing your name, phone number, or email in a header or footer, which many systems skip entirely, so a recruiter cannot find or contact you.
• Inventing a creative section heading like "My Journey" instead of "Work Experience," which the parser cannot file correctly, so the content lands nowhere searchable.
• Mixing date formats across different jobs on the same resume, which can cause the system to miscalculate your total years of experience.
• Keyword-stuffing a resume with terms you cannot support in an interview, which can trigger AI-based screening flags instead of boosting your score.
• Skipping a qualifying or knockout question, or answering it too literally, which can end things regardless of how strong the resume is.
• Assuming PDF is always the safer format, when testing has repeatedly found .docx parses more reliably on some major platforms.
• Reusing one generic resume for each job instead of matching the exact title and top skills from each posting.

What to Do Next Before You Apply

Work through the steps below in order the next time you prepare a serious application. Each one takes a few minutes and targets a failure point covered in this guide.

1. Pull the exact job title and the top eight to ten required skills right from the posting you are applying to.
2. Rebuild your resume in a single-column .docx master, using standard section headings and no tables, images, or headers.
3. Weave the posting's exact keyword phrases into your summary and work-experience bullets, aiming for the 65 to 75 percent range described earlier in this guide.
4. Run the plain-text self-check by pasting your resume into a plain document and reading it exactly as a parser would.
5. Complete each qualifying or knockout question as carefully as the resume itself, since a mismatched answer can end things on its own.
6. Save a PDF version only if the posting specifically accepts or requests one, and confirm it is text-based, not a scanned image, before you submit it.

Frequently Asked Questions

Can an ATS reject my resume without a person ever seeing it?

Rarely from resume content alone. Some systems auto-filter on qualifying-question answers, while others simply never surface a poorly parsed resume in a recruiter's search, producing a similarly silent outcome for the applicant.

Is a PDF or a Word document safer for an ATS?

Word (.docx) is usually the safer default. Vendor testing found .docx parses more reliably than PDF on some major platforms, though some hiring-side reviewers still prefer PDF once a human takes over. Follow the specific posting's instructions; when it says nothing, .docx is the better guess.

Does putting my contact information in the header hurt me?

Yes, on many systems. Vendor testing on 1,000 resumes found that contact details placed in a header or footer went unrecognized about a quarter of the time, since some parsers skip those regions of the document fully. Keep your name, phone, and email in the main body instead.

Can an ATS read a two-column resume?

Poorly, on most platforms. A parser that reads top to bottom in a single stream does not recognize two separate columns, so text from one side often merges into the other and creates garbled entries. Stick to a single-column layout if you expect to face an older, rule-based system.

What counts as a good ATS match score?

Most guidance points to 65 to 75 percent. Some career counselors report success around 65 percent. A common target sits closer to 75 percent for stronger odds. Scores much higher often mean the resume was over-optimized with repeated keywords rather than genuine detail.

Do employers see the exact file I upload, or a converted version?

Usually a converted, parsed version first. The system extracts your text into its own record, and that record, not your original file, is what a recruiter typically searches by default. Some platforms do let a recruiter open the original file directly instead.

Can an ATS detect that my resume was written with AI?

Some newer, AI-assisted systems can flag AI-generated patterns, though detection stays inconsistent across platforms. A full breakdown of what today's systems can and cannot detect lives in officeconsumer's guide to AI detection, which is worth reading before you rely on any writing tool. Writing in your own voice, with specific real details, remains the safer bet.

Do small businesses use an ATS too, or only large corporations?

Yes, increasingly. A Kelly OCG survey found roughly two-thirds of large companies and about a third of small organizations already use some recruiting software. Build one clean, ATS-safe resume as your default, since you rarely know which type of company sits behind a given form.

What happens if I skip a required screening question?

The application often stops there, regardless of your resume. Many platforms treat a required qualifying question, such as work authorization or a licensing requirement, as a hard gate that runs before or alongside resume parsing. Answer each required field completely, since an incomplete or mismatched answer can end an application on its own.

Should I use the exact job title from the posting on my resume?

Yes, when it is close to accurate. Literal job-title matching is still common even on newer platforms, so matching the posting's exact title can help you surface in a search. Only do this when the title truly reflects your role, since faking your title creates a bigger problem than a missed keyword.

How much does it cost a company to run an ATS?

It varies widely, from free tools to contracts costing six figures a year. Cost depends heavily on company size, the number of open roles, and features like AI screening or automatic ranking. A full breakdown of typical pricing tiers lives in officeconsumer's ATS cost guide, including what drives the low end and the high end of that range.

Can I check whether my resume is ATS-friendly for free?

Yes, in a few different ways. Paste your resume into a plain-text document and read the result, or run it through a free scanner like ResumeWorded's resume checker or Jobscan's resume scanner for a more detailed report. For a deeper walkthrough of the manual method, see officeconsumer's ATS-friendly guide and run both checks before you apply anywhere.