10 Resume Mistakes That Get You Rejected (And How to Fix Them)

Why Resume Mistakes Cost You Interviews

Recruiters spend an average of 7.4 seconds scanning a resume. In that window, a single glaring mistake—a typo, a cluttered layout, an irrelevant skill—can cause an instant pass. The frustrating part? Most of these mistakes are completely avoidable.

This guide covers the 10 most common resume errors that hiring managers and ATS systems penalize, along with concrete fixes you can apply today.

Mistake 1: Using One Generic Resume for Every Job

Sending the same resume to every job is the single biggest mistake job seekers make. ATS systems score your resume based on keyword match to the job description. A generic resume rarely scores above 50%—well below the threshold most employers set.

Fix: Tailor your resume for each application. At minimum, customize your professional summary and skills section. TechnCV can do this automatically in minutes by analyzing the job description.

Mistake 2: Describing Duties Instead of Achievements

"Responsible for managing social media accounts" tells a hiring manager nothing about your impact. Bullet points should quantify results, not list tasks. Recruiters want to know what changed because of your work.

Fix: Apply the formula "Action Verb + Task + Result + Metric." For example: "Grew Instagram following from 2K to 25K in 8 months by executing a data-driven content strategy, increasing website referral traffic by 40%."

Mistake 3: Including Outdated or Irrelevant Information

Listing your high school GPA 10 years into your career, including an AOL email address, or detailing an unrelated summer job from 15 years ago all signal a lack of self-awareness—and eat up precious space.

Fix: Remove anything older than 10-15 years unless it's directly relevant. Replace an unprofessional email address with firstname.lastname@gmail.com. Drop hobbies unless they directly relate to the role.

Mistake 4: Poor Formatting and Layout

Multi-column layouts, custom fonts, text boxes, and embedded graphics break ATS parsers. A resume that looks beautiful in your PDF editor may turn into a garbled mess when an ATS processes it.

Fix: Use a clean, single-column layout with standard fonts (Arial, Calibri, Georgia), consistent margins, and simple bullet points. Test your resume by pasting it into Notepad—if it reads cleanly, your ATS compatibility is good.

Mistakes 5–10: More Fatal Errors

Mistake 5: Typos and grammatical errors—proofread three times and use a tool like Grammarly. Mistake 6: Wrong resume length—1 page for under 5 years of experience, 2 pages for more senior roles.

Mistake 7: Missing contact information or using a header/footer for contact details (ATS can't read headers). Mistake 8: Using tables or columns—these break most ATS parsers.

Mistake 9: Lying or exaggerating—reference checks and technical interviews will expose this fast. Mistake 10: No professional summary—those first 4 lines are prime real estate; don't waste them.