You are applying. You are not getting interviews. You are not hearing back from job applications that seemed like a strong match. Your experience is solid — so what is going wrong?

In most cases, the answer is not your qualifications. It is your resume's formatting or resume keywords failing an automated check before a recruiter ever opens the file.

Over 98% of large employers use Applicant Tracking Systems (ATS) to screen applications automatically. These systems parse your resume, extract key information, match it against the job description, and score it — all in seconds. Resumes that score poorly are filtered out of the review queue. No notification, no feedback, no second chance.

The good news is that the most common ATS failures are entirely avoidable. This article covers the ten mistakes that most frequently cause resumes to be filtered out — and exactly how to fix each one.

Quick check before you read on: Want to see how well your current CV matches a specific job description before you apply? Try resum8 to get an ATS-optimised, tailored version in under two minutes — ready to submit.

Mistake 1 — Using Tables, Columns, or Multi-Column Layouts

This is the single most common ATS formatting failure, and the consequences are severe.

Most ATS platforms parse resumes by reading content linearly — left to right, top to bottom. When your resume uses a two-column layout, the parser often reads across both columns simultaneously, producing scrambled output: skills mixed into job titles, dates inserted mid-sentence, contact information embedded in the middle of work history.

The result is a resume that looks structured to the human eye but is effectively unreadable to the ATS.

The fix: Use a single-column layout for the entire document. All content should flow vertically, in a clean linear sequence. If you are using a resume template from a design tool, verify that it does not use invisible tables to create the visual layout — these cause the same parsing problem even when they are not visible.

Mistake 2 — Non-Standard Section Headings

ATS systems are programmed to recognise specific section labels. When they encounter a heading they do not recognise, they either skip the section entirely or misclassify its contents.

Headings like "My Journey," "Professional Wins," "What I Bring," or "Career Highlights" may seem distinctive. To an ATS, they are unrecognisable — and the content beneath them may never be attributed to the correct category.

The fix: Use the labels that every major ATS platform is built to identify:

  • Work Experience (or Professional Experience)
  • Education
  • Skills
  • Certifications
  • Summary (or Professional Summary)

There is no creative advantage to unconventional headings. The resume section structure is not where you differentiate yourself.

Mistake 3 — Sending the Same Resume to Every Role

Every ATS compares your resume against the specific language of a single job description. A resume written generically will match poorly against most postings — not because your experience is irrelevant, but because the terminology does not align.

If the job description says "demand generation" and your resume says "lead generation," many ATS systems will not register that as a match. If the posting emphasises "stakeholder management" and your resume says "client communication," the same problem occurs. The system is not making inferences — it is looking for specific terms.

The fix: Tailor your CV for each application. Read the job description, identify the language the employer uses for the skills and responsibilities you possess, and mirror that language in your resume — particularly in the summary, experience bullets, and skills section.

This does not mean rewriting your entire resume for every role. It means adjusting the key terms in the most relevant sections to reflect each specific posting. AI CV tailoring tools like resum8 streamline this process significantly.

Mistake 4 — Missing Keywords from the Job Description

Even if your resume is tailored, the specific resume keywords matter. ATS systems score resumes based on how many of the job description's required terms appear in your document — and missing even a handful of the core keywords can push your ATS score below the threshold for human review.

The most frequently filtered keyword categories, according to recruiter surveys, are: skills (76% of recruiters filter by this), education (60%), job title (55%), certifications (51%), and years of experience (44%). If your resume does not explicitly include the terms the recruiter is searching for in each category, your application will not surface in filtered results — even if you are genuinely qualified.

The fix: Extract keywords from the job description before tailoring your resume. Look for repeated terms, required skills, tools, certifications, and the exact job title. Use those terms verbatim in your resume — not synonyms or paraphrases.

Mistake 5 — Not Spelling Out Acronyms

ATS systems are not always configured to recognise that "SEO" and "Search Engine Optimisation" are the same thing — or that "CRM" means "Customer Relationship Management." Depending on how the system's keyword filters are set up, it may search for one version and miss the other entirely.

If a recruiter searches the ATS database for "Search Engine Optimisation" and your resume only says "SEO," your profile may not appear — even though the term is there in a different form.

The fix: Include both the full form and the acronym together: "Search Engine Optimisation (SEO)," "Customer Relationship Management (CRM)," "Project Management Professional (PMP)." This guarantees a match regardless of how the ATS filter is configured. Apply this rule to technical certifications, tools, methodologies, and any industry-specific terminology that has a common abbreviation.

Mistake 6 — Inconsistent or Incomplete Date Formatting

Dates are one of the most practically important elements on a resume from an ATS perspective — recruiters frequently filter candidates by years of experience, and the ATS determines this from your employment dates.

If your dates are formatted inconsistently (some positions listing "Jan 2022," others listing "2022," others listing "01/22"), the ATS may misinterpret your employment history. Critically, if you list only a year without a month, some ATS platforms automatically assign a start date of 1 January — which can distort the calculated length of your experience.

The fix: Use a single consistent format across all dates on your resume. The most widely recognised formats are:

  • Jan 2022 – Mar 2024
  • January 2022 – March 2024
  • 01/2022 – 03/2024

Always include the month. Never use apostrophes to shorten years (e.g., '22 instead of 2022). Apply the same format to every position, education entry, and certification date on the document.

Mistake 7 — Placing Contact Information in Headers or Footers

A practical quirk of many ATS platforms: they focus on the main body of the document and may not reliably parse content placed in the document's header or footer sections.

Many job seekers place their name, phone number, email address, and LinkedIn URL in the page header — which looks clean visually but can result in that information being missed by the ATS entirely. If the system cannot extract your contact details, your application may be incomplete in the recruiter's database.

The fix: Place all contact information — name, phone number, email address, LinkedIn URL, and location — in the main body of the document, at the very top of the page. Do not use the document header or footer section for any content that matters.

Mistake 8 — Graphics, Icons, and Non-Standard Bullet Points

Images, icons, logos, infographic-style skill bars, and decorative bullet symbols (stars, diamonds, checkmarks) are all parsed as formatting elements rather than readable content by most ATS systems. Information contained within or near these elements is frequently lost.

A skills section displayed as a visual progress bar — a common design choice in modern resume templates — is effectively invisible to ATS. The system cannot extract "Advanced: Python" from a horizontal bar chart. It can only read text.

The fix: Use plain text for all resume content. Bullet points should be standard round dots (•) or simple dashes. Skills should be listed as text, not displayed as visual ratings. Remove any icons from section headings or the contact section. If you want to show proficiency levels, write them out: "Python (advanced)" or "Conversational French."

Mistake 9 — Typos and Spelling Errors

This mistake operates on two levels. The practical level: if a keyword is misspelled, the ATS will not recognise it as a match. The professional level: 77% of hiring managers in one survey said they would reject a resume with any typos or grammatical errors, citing it as a signal of poor attention to detail.

The fix: Proofread at least twice — once on screen and once by reading the document aloud, which catches errors that visual scanning misses. Use a spell-checker, but do not rely on it alone: spell-checkers do not catch correctly spelled words used incorrectly ("manger" instead of "manager," "their" instead of "there"). Ask a second person to review your resume before sending it to any role you genuinely want.

Mistake 10 — Submitting Without Tailoring Your CV to the Role First

Most job seekers submit their resume hoping it will pass — without ever aligning it to the specific language and requirements of the job description. This is the equivalent of sitting an exam without checking whether you revised the right material.

By the time you find out your resume did not pass — via silence, or a generic rejection — it is too late to fix it for that application. The only effective approach is to tailor your CV before you submit, not after.

The fix: Before applying to any role, align your CV with the specific job description. resum8 helps you tailor your CV to match each role's language and priorities. A few minutes of tailoring before sending can be the difference between your application surfacing in recruiter searches or disappearing into a filtered database.

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The Bottom Line

Every one of these mistakes is fixable — and most take only a few minutes to address once you know what to look for.

The pattern across all ten is the same: ATS systems reward clarity, consistency, and alignment with the job description. Complex formatting, creative headings, and generic content all work against you in the automated screening stage.

Fix the formatting issues once and apply them to every future application. For the keyword and tailoring mistakes, the most efficient solution is to check your CV against each specific job description before you apply — rather than guessing and finding out later.

resum8 handles both sides: AI CV tailoring that aligns your CV with the job description's language, and an application tracker that logs every tailored version you submit. Try it free on your next application.

Frequently Asked Questions

What are the most common ATS resume mistakes?

The most common ATS resume mistakes are using tables or multi-column layouts that disrupt parsing, sending the same generic resume to every role without tailoring it, using non-standard section headings that ATS cannot recognise, and missing keywords from the job description. Formatting issues — such as graphics, text boxes, and contact details placed in headers or footers — are also frequent causes of ATS failure. All of these mistakes are avoidable with a clean single-column format and a tailored application.

Why is my resume not getting callbacks despite being qualified?

The most common reason is ATS filtering. Your resume may be well-qualified but poorly formatted for automated screening — missing key keywords from the job description, using a layout the parser cannot read, or containing inconsistencies that prevent a strong match. Before assuming the problem is your experience, check how well your CV aligns with the specific job descriptions you are applying to.

What file format is best for ATS?

.docx (Microsoft Word) is the safest file format for ATS compatibility across the widest range of systems. Most modern ATS platforms can also parse PDFs correctly, but older or lower-cost systems occasionally struggle with them. Avoid image formats (.jpg, .png), .rtf, and design tool exports. Always follow any file format specified in the job posting.

Can a well-designed, visually impressive resume hurt my ATS score?

Yes, significantly. Design elements that look polished to a human reader — multi-column layouts, skill bars, icons, graphics, and decorative fonts — are frequently misread or skipped entirely by ATS parsers. A clean, plain, single-column text document will outperform a beautifully designed one in ATS scoring every time.

How many keywords should a resume include?

There is no magic number, but a useful benchmark is a keyword match rate of 75% or above against the specific job description you are targeting. The keywords that matter most are those explicitly listed in the job posting — required skills, tools, certifications, and the job title itself.

Do all ATS systems work the same way?

No. Different platforms — Workday, Greenhouse, Lever, iCIMS, and others — have different parsing engines, keyword filters, and scoring algorithms. The core principles (clean formatting, keyword alignment, standard headings) apply across all of them, but specific configuration differences mean a resume that performs well in one system may perform differently in another.