Why Does AI Use So Many Em Dashes? (And How to Fix It on Your Resume)

AI writing tools overuse the em dash because it lets a model connect two related ideas into one fluent-sounding sentence without committing to stricter grammar — it's become one of the most recognizable stylistic habits of current large language models, ChatGPT included. Searches for "why does AI use so many em dashes" have grown 182% in the past year, as more people start noticing the pattern in AI-drafted writing — including their own AI-assisted resumes.

Here's why it happens, whether it's actually a reliable tell, and how to clean it out of a resume before you send it.

Why Does AI Use So Many Em Dashes in the First Place?

The em dash is a flexible punctuation mark — it can replace a comma, a colon, parentheses, or a period, all without forcing a decision about which one fits best. For a model trained to produce fluent, well-connected prose, that flexibility makes it a low-risk default. Rather than choosing between two shorter sentences or a more specific conjunction, the model links the clauses with a dash and keeps moving.

It's not unique to ChatGPT — the same pattern shows up across most current large language models, which is part of why "AI em dash" has become shorthand for AI-generated text in general, not a ChatGPT-specific quirk.

Is an Em Dash Actually a Sign of AI Writing?

By itself, no. Em dashes have a long history in human writing, and plenty of writers use them heavily and always have. What makes it a signal is frequency combined with context: several em dashes in a short document, especially paired with generic phrasing and uniformly structured sentences, reads differently than a single em dash used deliberately for emphasis.

For a resume specifically, the more relevant question isn't really "is this AI" — it's "does this read like a strong, direct bullet point." And on that measure, the em dash usually loses anyway.

How Do You Remove Em Dashes an AI Added to Your Resume?

  1. Search for it directly. In Word, Ctrl+H opens Find & Replace — search for the em dash character (—) to see every instance at once.
  2. Don't mass-replace. Review each one. Most resume bullets built around an em dash are really two separate points joined together — split them into a period, or tighten into one sentence with a stronger verb.
  3. Prefer the shorter version. Resume bullets read better as direct, active statements than as two clauses connected by a dash. "Led the migration — reducing downtime by 40%" reads more sharply as "Led the migration, reducing downtime by 40%," or split entirely if both halves deserve their own line.
  4. Check for other AI habits while you're at it. Overuse of "leverage," "seamlessly," "spearheaded," or a summary paragraph that could apply to any candidate in your field are the same category of tell as the em dash — worth a pass at the same time.

Rewrite Bullets Without the AI Tells

HAIRED's AI Writing Assistant rewrites your resume sections using your real experience, in direct resume language — no em-dash habit, no generic filler.

Does It Actually Matter for ATS or Recruiters?

An ATS won't penalize an em dash — parsing systems don't score punctuation. The reason it's worth fixing is entirely about the human reader: a recruiter skimming dozens of resumes notices a pattern like this quickly, and it invites the same scrutiny as any other AI tell — is the content behind it actually specific, or is it filler dressed up in confident language?

That distinction matters more than the punctuation itself. HAIRED's analysis of 10,000+ resumes found candidates whose CV matched 70%+ of a job description's keywords got interview callbacks at 5.8x the rate of those below 40%. A resume full of fluent-sounding but vague em-dash sentences tends to score low on that measure — not because of the dash, but because what usually surrounds it is generic phrasing standing in for real detail.

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The Bottom Line

The em dash itself isn't the problem — it's a legitimate punctuation mark that's become an easy tell simply because AI models default to it so often. On a resume, trimming it is worth doing regardless of the AI question, because direct, single-idea bullets read stronger than two clauses stitched together. Do that pass, add real specifics where the AI draft left things vague, and the resume stops reading like a prompt output — because it isn't one anymore.