Theirs vs Their’s

What’s the difference between theirs and their’s?

Theirs

Theirs is the third person plural possessive pronoun – it replaces their + noun.

Is this yours or theirs?

He found a book – is it theirs?

I can’t find my keys, but theirs are on the table.

Theirs is a better idea.

Theirs is over here.

 
Their’s

Though you may see their’s written even by native speakers, it is incorrect. Theirs should never have an apostrophe.

 
The Bottom Line

The idea that theirs needs an apostrophe comes out of the fact that on virtually every other word, ‘s indicates possession, so English speakers sometimes think theirs should be spelled their’s. However, this is always incorrect – theirs is the only correct spelling.

 
Related difficulties:

1 comment for “Theirs vs Their’s

  1. Shelly Kegan
    26 April 2014 at 2:59 pm

    This is not exactly true, the current spelling of theirs comes from middle english their’s.

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