Most resumes get rejected for reasons that have nothing to do with whether you can do the job. A stray typo, a vague opening line, a paragraph where a bullet should be, a file the employer's software can't read cleanly — small, fixable things that quietly cost you the interview. The good news is that almost every common resume mistake is exactly that: common, and fixable in minutes.
Below are 11 mistakes that show up again and again, each paired with a one-line fix you can apply today. Work through them top to bottom on your current draft. None of this requires talent or a rewrite from scratch — just attention.
1. Typos and grammar slips
A single typo signals carelessness for a role where details matter, and spellcheck won't catch a correctly spelled wrong word ("manager" vs. "manger," "pubic" vs. "public"). Fix: read it aloud once, then have one other person proofread it — a fresh set of eyes catches what yours skims past.
2. A generic objective or summary
"Seeking a challenging role at a growth-oriented company" tells the reader nothing and wastes your most-read line. Fix: replace it with a two-sentence summary naming your role, years of experience, and one concrete strength — e.g., "Customer support lead with 6 years handling escalations for SaaS accounts; cut average resolution time by building a triage playbook."
3. Duties instead of results
"Responsible for managing social media accounts" describes a job description, not your impact. Fix: rewrite each bullet as an accomplishment starting with a strong verb — "Grew Instagram following from 2K to 15K in eight months by shipping a weekly video series."
4. No numbers
Vague claims like "improved efficiency" or "increased sales" are forgettable because the reader can't picture the scale. Fix: quantify wherever you honestly can — percentages, dollar amounts, headcount, time saved, volume handled. If you don't know the exact figure, a defensible estimate ("roughly 200 tickets a week") beats nothing.
The single highest-leverage fix: turn every bullet from a description of duties into a result with a number. "Managed a team" becomes "Led a team of 6 and cut onboarding time from 3 weeks to 5 days." Do this one thing and your resume already beats most of the pile.
Put this into practice in minutes.
Build my resume — free5. A wall of text
Recruiters scan before they read, and dense paragraphs get skipped entirely. Fix: use short bullet points (one to two lines each), cap each role at three to six bullets, and leave real white space between sections so the page breathes.
6. Not tailoring to the job
One generic resume blasted to 50 openings performs worse than a version adjusted for each posting. Fix: read the job description, then mirror its language and reorder your bullets so the most relevant experience sits at the top. Tailr does this part for you — it reads the job description and helps you match your resume to it, then checks that the result parses cleanly through applicant tracking software (ATS).
7. Missing the keywords from the posting
Many employers filter or rank resumes in an ATS, and screeners search for specific skills and titles. If the posting says "project management" and your resume only says "ran projects," you may not surface. Fix: pull the exact skills, tools, and job-title language from the description and use those words where they're genuinely true of you — never keyword-stuff terms you can't back up.
8. Over-designed formatting that breaks parsing
Text boxes, multi-column layouts, tables, headers/footers, and graphics can scramble when an ATS extracts your text — your job titles and dates come out jumbled or missing. Fix: use a clean single-column layout with standard section headings ("Experience," "Education," "Skills") and keep critical details in the main body, not inside images or sidebars.
9. The wrong file type
A resume saved as an image, or a format the system can't read, can arrive as a blank or garbled record. Fix: submit a text-based PDF unless the posting asks for something else — it preserves your layout and stays machine-readable. When an application form specifically requests .docx, follow that.
10. Too long — or padded to look longer
A three-page resume for a role that needs one page buries your best material, and filler experience from 15 years ago dilutes it. Fix: aim for one page early-to-mid career, two pages for extensive senior experience, and cut anything that doesn't support the job you're applying for now.
11. Unprofessional or missing contact details
A cutesy email address, a dead phone number, or no clear way to reach you can quietly end things before they start. Fix: use a simple name-based email, double-check your phone number, and put your contact line in plain text at the top — not tucked inside a header the ATS may ignore.
Run the checklist before you send
Before submitting any application, do a two-minute pass: proofread aloud, confirm every bullet leads with a verb and carries a result, check that the posting's key terms appear where they're true, and open your PDF to make sure the text is selectable (highlightable) rather than an image. Fixing these 11 items won't invent experience you don't have — but it makes sure the experience you do have actually gets read.
Frequently asked questions
What is the most common resume mistake?
The most common and most costly mistake is listing duties instead of results. Bullets like "Responsible for managing accounts" describe a job description, not your impact. Rewrite each one to lead with a strong verb and include a measurable result — for example, "Grew a client portfolio from 20 to 55 accounts in one year." Adding real numbers is the single highest-leverage change you can make.
Why does my resume get rejected by ATS software?
Usually because of formatting or missing keywords. Multi-column layouts, text boxes, tables, and graphics can scramble when applicant tracking software extracts your text, and contact details hidden in a header may be dropped. Recruiters also search for specific skills and titles, so if your resume doesn't use the exact terms from the posting (where they're true of you), it may not surface. Use a clean single-column layout, standard section headings, and mirror the posting's language.
Should I use one resume for every job application?
No. A single generic resume performs worse than versions tailored to each posting. Read the job description, mirror its keywords and job-title language, and reorder your bullets so the most relevant experience appears first. You don't have to rewrite everything each time — adjusting the summary, skills, and top bullets is usually enough. Tailr can automate this by matching your resume to a specific job description and confirming it parses cleanly through ATS.
What file type should I submit my resume as?
Submit a text-based PDF unless the application specifically asks for another format, such as .docx. A PDF preserves your layout across devices and stays machine-readable. Avoid saving your resume as an image (like a JPG or a scanned page), because ATS systems can't extract text from it and your application may arrive blank or garbled.