Can hiring managers tell if your cover letter was written by AI?

Often, yes. Most hiring managers say they can spot AI-written cover letters, and more than half admit it changes how they view the person who sent it.

So if you pasted the job description into a chatbot, got a letter back in ten seconds, and are hoping no one notices, that's probably not the news you wanted to hear.

What actually gives it away

Most of the time, it is the writing style. AI tends to sound overpolished. Every sentence feels a little too smooth and full of vague phrases like "proven track record" and "detail-oriented professional." They sound nice but do not actually say much.

It also usually just pulls straight from your resume: managed accounts, handled escalations, trained new staff. It reads like a task list instead of a letter that connects to what this job needs.

And the opener is almost always generic. Something like "I am excited to apply for this position," which could work for almost any job out there.

None of these things alone prove it was written by AI. Plenty of people write generic cover letters themselves. But when you see them all together, the message to the hiring manager is the same: nobody really sat down and thought about this specific job.

What the data actually shows

About 54% of hiring managers say that using AI changes how they view a candidate. And 80% say they dislike seeing content that is clearly AI generated.

At the same time, 78% of job seekers have used AI too. So hiring managers are not hunting for some rare exception anymore. They are expecting it.

Using AI to help with your letter will not get you rejected by itself. But if you send something generic, you are giving them an easy reason to move on to the next candidate.

AI-generated vs. AI-assisted

AI-generated is when you paste in the job description, copy out the letter, and send it exactly as it came out. It mostly just restates your resume in polished sentences, so it could go to almost any employer for almost any role.

AI-assisted is when AI gives you a first draft to start from, then you take over. You check it's used the parts of your resume that actually match this job, and edit it in your own words, adding, cutting, or fixing whatever needs it.

What hiring managers really care about is not if you used AI. It's whether you took the time to tie your letter to this job.

What to do if you used AI to write yours

You don't need to rewrite the whole thing, but you do need to read it and edit it before you send it. Light edits are usually enough, and it doesn't have to take long. The point is to make it yours instead of relying on whatever AI handed you.

AI is just a tool for putting together a first draft. Editing it afterward is how you show you actually care about this job, and it's what makes the letter sound like you instead of anyone else.

So, can they tell?

Often yes. But it is less about the AI and more about people stopping at the first draft.

Read it once. Make it sound like you. Then send it.