When does its has an apostrophe?

Answer 1

"Its" without an apostrophe shows possession, as in "its hair is brown." Other possessive pronouns include my, your, his, her, our, and their.

"It's" with an apostrophe is always a contraction of two words, in which a letter or letters has been removed. For example, "It's a boy" is a contraction for "It is a boy" and the apostrophe takes the place of the missing "i."

Also, the initial question should read, "When does "its" have an apostrophe?" But don't worry about that. It's good enough to learn the difference between its (a possessive adjective) and it's (a contraction of "it is").