Resume Mistakes That Hurt ATS Scores and Recruiter Readability

Why These Mistakes Matter

An applicant tracking system stores your resume, pulls its text into fields, and lets recruiters search and filter candidates. A recruiter then reads what the system shows them. Most mistakes on this page hurt in one of two ways: the software reads your resume incompletely, or a person skimming it cannot quickly see that you match the role. Each mistake below comes with a fix you can apply in a few minutes.

Mistake 1: Using One Generic Resume for Every Job

A generic resume may describe your background, but it often fails to match the specific language and priorities of a job description. Tailoring does not mean changing your experience. It means presenting the most relevant parts of your experience clearly for each role.

• Fix: keep one complete master resume, then make a copy for each application and reorder your summary, skills, and bullets so the experience closest to the posting comes first.
• Fix: reuse the posting’s own terms where they honestly describe your work. If the job says “stakeholder management” and your resume says “worked with business teams,” use the posting’s phrase.
• Example: a project manager applying to a construction firm leads with site schedules and subcontractor coordination; the same person applying to a software company leads with sprint planning and release management.

• How to tailor your resume to a job description

Mistake 2: Missing Important Keywords

ATS systems and recruiters search for skills, tools, responsibilities, certifications, and role-specific terms. If your resume does not mention relevant keywords that reflect your real experience, it may appear less aligned than it actually is.

• Fix: read the posting and list every skill, tool, credential, and duty it names. Mark the ones you genuinely have, and make sure each of those appears somewhere in your resume.
• Fix: show the important ones in context, not only in a skills list. “Built weekly sales dashboards in Power BI” is stronger evidence than “Power BI” alone.
• Keep it honest: leave out any keyword you could not discuss confidently in an interview.

• Compare your resume with a job description

Mistake 3: Weak Achievement Bullets

Responsibilities explain what you were supposed to do. Achievements explain what changed because of your work. Replace vague bullets with stronger statements that include scope, action, tools, and outcomes whenever possible.

Mistake 4: Overdesigned Formatting

Creative layouts, icons, images, complex tables, and unusual section names can make a resume harder to parse. A resume can still look modern while using clean formatting, consistent spacing, clear headings, and readable text.

• Fix: use a single-column layout, a standard font, and simple bullets. Two columns can work in some systems, but one column is the safer choice.
• Fix: replace skill bars, star ratings, and charts with plain words such as “Advanced Excel” or “Conversational Spanish.” A rating graphic carries no text a system can search.
• Fix: export to the file type the employer asks for. When no type is named, a text-based PDF or a Word file is usually safe; a scanned image of your resume is not.

• ATS-friendly resume templates

Mistake 5: Hiding Key Information

Avoid placing important information only in headers, footers, images, or graphical elements. Some systems may not read these areas reliably. Keep critical details such as name, contact information, skills, certifications, and role titles in normal text.

• Fix: put your name, phone, email, city, and LinkedIn URL in the body at the top of page one, not in the document’s header area.
• Fix: write certifications and licenses as text, with the issuing body, rather than showing only a badge image.

Mistake 6: Inconsistent or Missing Dates

Many systems estimate your years of experience from the dates on each role, and recruiters scan them to understand your career at a glance. Mixed formats, missing months, or dates tucked beside the company name in an unusual layout can make that harder.

• Fix: use one date format for every role, such as “Mar 2021 – Present,” and place it in the same position each time.
• Fix: if you held several roles at one employer, give each role its own title and dates so your progression is visible.

Mistake 7: Acronyms Without the Full Term

A recruiter may search for “Search Engine Optimization” while your resume only says “SEO,” or the other way around. Not every system treats an acronym and its full form as the same thing.

• Fix: write the full term once with the acronym in brackets, for example “Customer Relationship Management (CRM),” then use the acronym afterwards.
• Fix: follow the posting’s lead. If it uses the acronym for a credential, such as PMP or CPA, include it exactly that way.

Mistake 8: Unusual Section Headings

Creative headings such as “Where I’ve Made an Impact” or “My Toolkit” look distinctive but can confuse software that looks for standard section names, and they slow a recruiter down.

• Fix: use familiar headings: Summary, Experience, Skills, Education, Certifications, and Projects where relevant.

Mistake 9: Chasing a Perfect Score

A perfect ATS score is not the real goal. Your resume should be accurate, relevant, readable, and convincing. Olyres helps improve alignment, but it should never be used to invent experience or overload the resume with unnatural keyword repetition.

• Fix: aim to cover the requirements you genuinely meet, clearly and in context, and stop there. Repeating a keyword many times makes the resume harder for a person to read.
• Fix: treat a score as a checklist of gaps to review, not as a grade to maximize.

• What is a good ATS score?

Pre-Submission Checklist

Run through this list before you send each application:

• Your name and contact details are in the body of page one, not in a header, footer, or image.
• Section headings are standard: Summary, Experience, Skills, Education, Certifications.
• Every role has a job title, employer, location if relevant, and dates in one consistent format.
• The summary names the target role and your strongest matching experience.
• Each must-have requirement in the posting that you genuinely meet appears in your resume, ideally inside a bullet.
• Acronyms are spelled out once, and credentials match the posting’s wording.
• Bullets start with an action verb and include scope, tools, or results where you can.
• There are no skill bars, charts, text boxes, or photos carrying important information.
• The file is the type the employer asked for and is named clearly, such as “Firstname-Lastname-Resume.pdf.”

• Check your resume against a job description
• Build a clean resume from scratch

Resume Mistakes FAQs

Common questions about fixing a resume for applicant tracking systems:

Will an ATS automatically reject my resume because of one formatting mistake?

Usually not. Most systems store every application, and rejections are typically decided by recruiters, knockout questions, or filters an employer sets up. Formatting problems matter because they can leave parts of your resume unreadable or hard to find in a search, which makes you look less qualified than you are.

Is a PDF or Word file better for an ATS?

Follow the employer’s instructions first. Without instructions, a text-based PDF or a Word document both generally work. Avoid PDFs made from a scan or photo, because they contain no selectable text.

How many keywords should my resume include?

There is no target number. Include the skills and terms from the posting that honestly describe your experience, and show the most important ones in your bullets as well as your skills list.

Should I fix these mistakes for every application?

Formatting, headings, dates, and contact details only need fixing once in your master resume. Keywords, the summary, and the order of your bullets are worth adjusting for each job.

• More career guides and resume examples