If you’ve sent out dozens of applications and heard nothing back, the problem usually isn’t your experience. It’s something far more fixable: how your resume is built, and whether the software reading it can actually understand what’s on the page.
Across the resumes we review alongside client applications, the same handful of mistakes show up again and again — often on resumes from genuinely well-qualified candidates. None of these are about being unqualified. They’re about a piece of software, or an overwhelmed recruiter, failing to register qualifications that are clearly there.
One thing worth getting straight before the list, because it changes how you should think about all of it: most Applicant Tracking Systems don’t actually auto-reject your resume. Recent recruiter data is fairly clear on this — when Enhancv interviewed 25 U.S. recruiters in late 2025, only 8% had configured their ATS to auto-reject based on content. The other 92% review manually or use simple knockout filters. So these “mistakes” aren’t tripping a hidden delete switch. They’re doing something quieter and just as damaging: making your qualifications hard to find, hard to parse, or easy to skip when a recruiter is moving fast through a large stack. (We cover the full picture in why your resume gets rejected.)
Here’s what actually goes wrong.
Mistake #1: Multi-Column Layouts
A two-column resume looks clean and modern to a human eye. To many ATS parsers, it’s a coin flip. Depending on how the system reads the page, content can get scrambled out of order, merged across columns, or dropped entirely. Industry parsing tests have found that resumes with complex multi-column layouts can lose 50% or more of their content when processed by ATS software — meaning half of what you wrote may never enter the system at all.
The resume-design trend has actually been moving back toward single-column formats specifically because they parse more reliably across different platforms.
Fix: Stick to a single column. If you want visual organization, use clear section headers and white space instead of side-by-side columns. (Our ATS-friendly resume template is built single-column by default.)
Mistake #2: Important Information in Headers or Footers
Some ATS parsers skip header and footer content entirely, treating it as page furniture rather than resume content. If your name, phone number, or email lives in a header, there’s a real chance the system never registers it — so your application looks incomplete even though you filled everything in correctly.
Fix: Put your contact information in the main body of the document, in plain text, at the top of the page.
Mistake #3: Tables, Text Boxes, and Graphics
Skills bars, icon-based ratings, and content trapped inside tables or text boxes are frequently invisible to ATS software. You might show “Excel: Advanced” as a five-star graphic — but if the system can’t read graphics, that’s a skill it now has zero record of you having. The same goes for a chart of your “core competencies” or a sidebar built as a text box.
Fix: Represent every skill, tool, and qualification as plain text. Save the visual flair for a personal portfolio site, not the resume going through ATS.
Mistake #4: The Same Resume for Every Application
This is the single biggest one, and it’s not really a formatting issue — it’s strategy. Every posting weights a slightly different set of priority keywords and phrasing. A resume tuned for one listing won’t automatically match the next, even for a similar-sounding role.
The data here is hard to ignore. A 2024 analysis of over one million applications found that aligning your resume’s title with the job’s title increased interview rates roughly 3.5x. Broader job-search analyses put tailored applications at a 7–9% interview conversion rate versus 2–3% for generic ones. And in a 2025 TopResume survey, a majority of recruiters named failure to tailor as one of the top resume mistakes — meaning it costs you with the human reader too, not just the parser.
Fix: At minimum, adjust your top summary lines, your skills section, and a few bullet points to mirror the specific language of each posting before submitting. This is targeted editing, not a rewrite each time. (Step-by-step in how to pass ATS screening.)
Mistake #5: Non-Standard Section Headers
Calling your work history “My Journey” or your skills section “What I Bring to the Table” feels more personal, but ATS systems are trained to look for standard labels — “Experience,” “Skills,” “Education.” Creative alternatives can cause the parser to misclassify or skip that section entirely, so your work history might simply not register as work history.
Fix: Use conventional section headers. Save the personality for your cover letter and LinkedIn About section, where creative writing actually helps. (See how to write a LinkedIn About section.)
Mistake #6: Keyword Stuffing
In an attempt to “beat the ATS,” some candidates cram in every possible keyword, repeating terms unnaturally or — in the worst version — hiding white keyword text in the margins. This backfires on both ends now. Modern ATS platforms increasingly use natural-language processing and can flag unnatural keyword patterns. And the recruiter who reads your resume next can spot a keyword-stuffed document in seconds; one recruiter described it as reading “like a job description ran through a blender.” The hidden-white-text trick is worse still: many recruiters copy resume text into a plain document to read it, at which point the hidden keywords become plainly visible — and disqualifying.
Fix: Use keywords naturally, in context, the way you’d actually describe the work. “Led cross-functional teams using Agile methodology to deliver a launch two months ahead of schedule” does the keyword-matching job and reads like a human wrote it — far better than a bare list of buzzwords.
Mistake #7: Treating Dates and Work History as Optional
Some formats — particularly fully functional, skills-grouped resumes — de-emphasize employment dates. It feels like a smart way to handle a gap, but some ATS systems specifically flag or even auto-reject resumes that lack clearly dated work entries, and a recruiter scanning quickly reads missing dates as something to be suspicious of.
Fix: If you have a gap or are changing careers, use a hybrid format — a brief skills summary up top, but a normal, fully-dated chronological history below it. (We break down all three formats in the resume format guide.)
The Pattern Behind All of These
Every one of these mistakes shares a root cause: optimizing for how a resume looks over how it actually reads — both to the software doing the first parse and to the human skimming a large pile under time pressure. (How much time? The often-cited “6 seconds” is a contested 2012 figure; better-sourced studies since put the initial scan closer to 7.4 seconds, with one 2025 study measuring around 11 seconds. Either way, it’s a glance, not a read — which is exactly why clarity beats decoration.)
The good news: none of these fixes require starting over. Most of the time it’s a formatting pass, not a rewrite, that makes the difference between a resume that vanishes and one that actually reaches a person.
Frequently Asked Questions
Will an ATS reject my resume if it has a typo?
No — ATS software parses keywords, sections, and structure; it doesn’t grade grammar. But the human who opens your resume next absolutely notices typos, and they’re a common reason for rejection at the human-review stage. Proofread anyway.
Is a PDF or Word document better for ATS?
Both can work, but they parse differently across systems — some testing shows Word (.docx) parsing more reliably on certain platforms while PDF holds up better on others. The safe move is to save and check your resume in both formats, and follow the job posting’s stated preference if it gives one.
Do these mistakes matter if I’m applying through LinkedIn Easy Apply?
Yes. LinkedIn Easy Apply still passes your resume into the employer’s ATS in most cases, and the same parsing rules apply. A clean, single-column, plain-text-friendly resume travels well regardless of how you apply.
How do I know if my resume is ATS-readable?
A quick DIY test: copy your resume text and paste it into a plain text editor like Notepad. If sections scramble, merge, or lose information, an ATS will likely struggle too. Free scanners like Jobscan or Resume Worded can also flag parsing issues before you submit.
The Bottom Line
None of these seven mistakes are about your qualifications. They’re about whether the system — and the rushed human behind it — can even see those qualifications in the first place. Fix the formatting, tailor each application, and write keywords like a person rather than a parser, and you’ve handled the overwhelming majority of what quietly sinks otherwise-strong resumes.
If running this check on every application sounds like a part-time job on top of your actual job search, that’s the work we take off your plate — every application we send is built to parse cleanly and read well. You can see how it works or get started.
