Professional Writing

Your LinkedIn Profile Is Leaking: The Grammar Errors That Quietly Cost You the Interview

Fix My Grammar Aug 4, 2026

Let's be honest: most of us spent more time picking a LinkedIn profile photo than we did proofreading our About section. And that's a problem—because while you were agonizing over lighting and angles, a misplaced apostrophe was quietly doing damage to your professional reputation.

Recruiters and hiring managers look at hundreds of profiles a week. They're not just scanning for job titles and company names. Whether consciously or not, they're forming impressions based on how you write. Grammar mistakes don't just look sloppy—they signal carelessness, and in a competitive job market, carelessness is a dealbreaker.

The good news? These errors are fixable. Let's walk through the most common offenders, show you exactly what they look like in the wild, and give you a checklist to audit your profile before you hit "Apply."

The Apostrophe Apocalypse

Apostrophes are small, but they cause enormous confusion. The two most common mistakes on LinkedIn profiles involve possessives and contractions.

The mistake: Confusing its and it's, or writing your when you mean you're.

❌ "Your going to love working with my team."
✅ "You're going to love working with my team."
❌ "The company reached it's highest revenue in 2023."
✅ "The company reached its highest revenue in 2023."

These are homophones—words that sound identical but carry different meanings. When they're wrong in a professional bio, they stick out like a typo in a résumé header. Recruiters notice. They might not say anything, but they notice.

A quick fix: any time you type it's or you're, ask yourself if you can replace it with the full phrase (it is or you are). If the sentence still makes sense, you've got the right one.

Subject-Verb Agreement: The Silent Credibility Killer

This one sneaks up on people because the mistake often sounds fine when you read it out loud quickly. But in writing, it's glaring.

The mistake: Using a plural verb with a singular subject, or vice versa.

❌ "A team of skilled engineers are responsible for the product launch."
✅ "A team of skilled engineers is responsible for the product launch."

The subject here is team (singular), not engineers. The phrase of skilled engineers is just a modifier. This kind of error appears constantly in LinkedIn summaries and job descriptions, especially when writers are trying to sound impressive and pack a lot of information into one sentence.

Another common version:

❌ "My experience with data analysis and project management make me a strong candidate."
✅ "My experience with data analysis and project management makes me a strong candidate."

The subject is experience—singular. The fix is simple once you learn to identify the actual subject of your sentence.

Comma Chaos: Too Many, Too Few, and in All the Wrong Places

Commas are the punctuation equivalent of breathing—get the rhythm wrong and everything feels off. On LinkedIn, comma errors tend to fall into two camps: comma splices and missing commas after introductory phrases.

Comma splice example:

❌ "I led a cross-functional team of 12 people, we exceeded our quarterly goals by 30%."
✅ "I led a cross-functional team of 12 people, and we exceeded our quarterly goals by 30%."
✅ "I led a cross-functional team of 12 people. We exceeded our quarterly goals by 30%."

A comma splice happens when you join two complete sentences with just a comma and no coordinating conjunction. It's one of those mistakes that makes writing feel rushed and unpolished.

Missing introductory comma example:

❌ "After five years in marketing I transitioned into product development."
✅ "After five years in marketing, I transitioned into product development."

That comma after an introductory phrase isn't optional—it's a signal to the reader that the setup is done and the main point is coming. Leaving it out creates a tiny moment of confusion that adds up across an entire profile.

Passive Voice Overload

Okay, passive voice isn't technically a grammar error—but it's a writing habit that weakens your LinkedIn presence significantly. Profiles packed with passive constructions read as evasive, like you're describing work that happened around you rather than work you drove.

❌ "Sales targets were consistently exceeded during my tenure."
✅ "I consistently exceeded sales targets, growing revenue by 22% year over year."

Active voice puts you in the driver's seat. On a professional profile, that's exactly where you want to be.

Capitalization Quirks That Undermine Your Professionalism

Random capitalization is another pattern that quietly signals a lack of attention to detail. Job titles, departments, and general nouns often get capitalized unnecessarily—probably because people assume it looks more official.

❌ "I work as a Senior Marketing Manager in the Digital Strategy Department." (when used generically in a sentence)
✅ "I work as a senior marketing manager in the digital strategy department."

Note: If you're listing your official job title as a header or label, capitalization is appropriate. But inside a running sentence, most general titles and roles are lowercase.

Your LinkedIn Grammar Audit Checklist

Before you send your next application, run through this quick checklist on your profile:

Homophones check — Search for its/it's, your/you're, there/their/they're, and affect/effect
Subject-verb agreement — Read each sentence and identify the true subject; confirm the verb matches
Comma splices — Look for sentences joined by only a comma; add a conjunction or split them
Introductory phrases — Make sure every sentence that starts with a setup phrase has a comma before the main clause
Passive voice scan — Rewrite any sentence that buries "I" or removes you as the actor
Capitalization audit — Check that you're not capitalizing common nouns mid-sentence
Read it out loud — Your ear will catch rhythm problems your eye misses
Fresh eyes — Step away for an hour, then re-read. Or paste your About section into a grammar checker for a second opinion.

The Bottom Line

Your LinkedIn profile is often the very first writing sample a recruiter sees from you. Before the cover letter, before the portfolio, before the interview—there's your profile. Every sentence is a small demonstration of how you think, how you communicate, and how much care you bring to your work.

The grammar mistakes covered here aren't exotic or complicated. They're common, fixable, and—once you know what to look for—surprisingly easy to catch. Take an hour this week to audit your profile. Clean up the commas, fix the homophones, and let your actual accomplishments do the talking.

Your next opportunity might hinge on it.