10 Common Resume Mistakes That Cost You Interviews

Small resume mistakes can get you filtered out before anyone talks to you. The frustrating part: most of them are entirely avoidable. Recruiters see these same errors on hundreds of resumes every week. Here are the ten that cost candidates interviews most often—and exactly how to fix each one.

1. Typos and Grammar Errors

A spelling mistake or grammatical error is the fastest way to signal carelessness to a recruiter. It doesn't matter how qualified you are—a typo in your first bullet raises the question: if they didn't proofread a document this important, what will they overlook on the job?

Spell-check isn't enough. It won't catch "manger" instead of "manager," "their" instead of "there," or a doubled word like "led led." Read your resume out loud line by line—your ear catches what your eyes miss. Then have at least one other person read it too.

2. Missing or Wrong Contact Info

An outdated phone number or a typo in your email address means a recruiter who wants to call you simply can't. This happens more than you'd think: people update their resume content but forget to update a phone number they changed two years ago.

Double-check that your email address is professional (firstname.lastname@gmail.com, not partyanimal2009@hotmail.com), your phone number is current, and your LinkedIn URL actually works. If you include a portfolio or personal site, verify those links too.

3. Generic Summary or Objective

"Hard-working professional seeking a challenging role in a dynamic organization." Recruiters have read this sentence thousands of times. It says nothing about you, the role, or why you're a fit. Worse, it takes up prime space at the top of your resume—the first thing anyone reads.

4. Vague Bullets with No Impact

"Responsible for marketing" and "helped with customer service" tell a recruiter nothing about what you actually did or how well you did it. Every bullet should answer two questions: what did you do, and what changed as a result?

Start bullets with strong action verbs (led, built, reduced, launched, negotiated, designed) and finish with a result wherever possible. If you don't have a number, describe the scope or outcome qualitatively: "Led migration of 8-year-old monolith to microservices with zero customer-facing downtime."

5. No Tailoring to the Job

Sending the exact same resume to every job is one of the most common—and most damaging—mistakes. A resume that isn't tailored looks like you didn't read the job posting. More practically, it will score poorly with ATS systems that are ranking candidates by keyword match.

You don't need to rewrite your resume from scratch for every application. At minimum: reorder your bullets so the most relevant experience for this role appears first, swap in keywords from the job description, and update your summary. That 15-minute investment can double your hit rate.

6. Bad Formatting or Wrong Length

Tiny fonts, no white space, tables, graphics, and dense paragraphs make your resume exhausting to read. ATS systems also struggle to parse tables and multi-column layouts—your bullets may not even be read in the right order.

Use a simple single-column layout, a standard font (Arial, Calibri, Georgia) at 10–12pt, and 0.75"–1" margins. For most candidates with under 10 years of experience, one page is ideal. Senior candidates can go to two pages. Beyond two pages is almost always too long.

7. Unexplained Employment Gaps

A year-long gap with no explanation isn't automatically disqualifying—but it will raise questions. If a recruiter has to wonder what happened, they may move on to candidates who don't require that guesswork.

You don't need a detailed explanation. A brief label is enough: "Career break—family caregiving," "Freelance consulting," "Sabbatical—enrolled in full-time coursework." If you did anything productive during the gap (courses, volunteering, freelance work, open-source contributions), list it as its own entry. That turns a gap into a story.

8. Irrelevant or Outdated Content

Listing every job you've ever held—including the summer you worked at a coffee shop in 2009—doesn't make your resume more impressive. It dilutes the parts that matter and makes recruiters work harder to find the relevant experience. Same goes for skills and tools that haven't been industry-standard for a decade.

Keep the last 10–15 years unless earlier experience is directly relevant to the role. Cut skills like "Microsoft Word" from a senior technical resume. Remove hobbies and interests unless they're genuinely relevant or the role is in a field where culture fit is a primary criterion.

9. Lying or Significant Exaggeration

Inflated titles, made-up metrics, responsibilities you didn't own, or skills you'd fail a basic test on—all of these surface eventually. Background checks catch misrepresented titles and dates. Technical screens catch overstated skills. Reference calls surface exaggerated responsibilities.

You can always frame your real experience in the most favorable honest light. "Contributed to" instead of "led." "Supported the team that achieved X" instead of claiming solo credit. Honesty paired with strong framing is both safer and more sustainable than exaggeration.

10. Wrong File Format or Unprofessional File Name

Sending "resume_FINAL_v3_use_this_one.docx" when the posting asked for a PDF signals a lack of attention to instructions. Some ATS systems can't parse certain file formats at all—if your resume arrives as a .pages file or a scanned image, it may be completely unreadable.

Follow the posting's format instructions exactly. If no format is specified, PDF is the safe default—it preserves your formatting across all devices. Name your file clearly: "Jane_Smith_Resume.pdf." That's the file name a recruiter will see in their downloads folder at 11pm before an interview day.

The Full Checklist

The Bottom Line

None of these ten mistakes are hard to fix once you know to look for them. The problem is that most people don't—they write a resume once, update a few lines, and keep sending it out. A thorough review against this list takes less than an hour and can meaningfully increase the number of interviews you get. Avoiding these mistakes won't guarantee an interview, but it will keep your resume in the pile instead of the reject stack.