Quick Lessons
Its vs. It’s: The Apostrophe Rule That Trips Everyone Up
A simple, lasting way to remember the difference between its and it's, with examples and a foolproof substitution test.
By Vocabaura Editorial · Published 6 August 2026 · 2 min read
Quick answer
Its (no apostrophe) shows possession, meaning “belonging to it.” It's (with apostrophe) is a contraction of “it is” or “it has.” If you can replace the word with “it is,” use it's; otherwise, use its.
Its and it's are identical in sound and nearly identical in spelling, yet they do opposite jobs. The apostrophe is doing all the work here, and it's the single most misplaced punctuation mark in English writing.
Quick Answer
Its shows ownership: something belongs to it. It's is short for “it is” or “it has.” The apostrophe always signals a contraction, never possession, when it comes to this particular word.
Its: Showing Possession
Its works like his or her — a possessive pronoun with no apostrophe. “The company changed its logo” means the logo belongs to the company. No apostrophe is needed, and adding one is the single most common error in this pair.
It's: A Contraction
It's always stands in for two words squeezed together: “it is” or “it has.” “It's raining again” means “it is raining again.” “It's been a long week” means “it has been a long week.”
Correct (possessive)
The dog wagged its tail.
Correct (contraction: it is)
It's too cold to go outside.
Correct (contraction: it has)
It's rained every day this week.
Incorrect
The company lost it's biggest client. (Should be “its,” since nothing is being contracted.)
The Key Difference
No other possessive pronoun in English uses an apostrophe — think “his,” “hers,” “yours,” “theirs.” Its follows that same pattern. The apostrophe form, it's, is reserved entirely for contractions.
| Its | It's | |
|---|---|---|
| Function | Possessive pronoun | Contraction |
| Stands for | belonging to it | it is / it has |
| Apostrophe | Never | Always |
| Test | Can't expand to “it is” | Can expand to “it is” or “it has” |
Common Mistakes
- Adding an apostrophe out of habit, since most possessives (like “dog's”) do use one.
- Writing “it's” for possession: “the team celebrated it's win” should be “its win.”
- Writing “its” for a contraction: “its been a while” should be “it's been a while.”
- Not running the substitution test before submitting formal writing, where this error stands out most.