It's with an apostrophe is a contraction — it is or it has, nothing else. Its without an apostrophe is a possessive determiner, in the same family as his, her, my, your, their. The apostrophe in it's marks missing letters, not ownership; English possessive pronouns never take apostrophes (his, hers, yours, its).
The 25 sentences below drill the one-second replacement test — expand it's to it is; if the sentence survives, the apostrophe stays — plus the advanced traps: its own, it's been, whose vs who's, and the corporate-speak its. Every answer is checked instantly with the reason explained.
It's vs Its Quiz: 25 Questions
The One Rule: Apostrophe = Missing Letters, Never Ownership
It's is a contraction of it is or it has — the apostrophe stands where letters went missing. Its is a possessive determiner, a member of the pronoun family my, your, his, her, our, their — and not one member of that family takes an apostrophe. The confusion exists because nouns show possession with 's (the company's logo), but pronouns never do.
So the rule has two halves: it's = it is / it has, always and only. Its = belonging to it, always and only. There is no third usage, and the form its' does not exist in English.
Why Even Native Writers Get This Wrong
English uses 's to mark possession on nouns — Sarah's car, the team's budget — so the eye learns that apostrophe-s means belongs to. Pronouns quietly opt out of that system: his, hers, yours, ours, theirs, its all show possession with no punctuation at all. The its/it's error is what happens when the noun rule gets applied to the pronoun by analogy.
Autocorrect makes it worse, not better: both forms are valid words, so no tool flags 'the company changed it's logo' without a grammar engine. That is why the error survives into published emails, websites, and reports — and why proofreading for this pair specifically is worth the thirty seconds.
The Whole Homophone Family: You're, They're, Who's
Its/it's is one member of a family of contraction-vs-possessive pairs that all follow the same logic. Learn the family together and one rule covers every member: the apostrophe always marks a missing verb, never ownership.
How to Make the Choice Automatic
Run the 25 questions above, then do the two-minute real-world drill: open any news site or app store page and find five its/it's in the wild, expanding each one mentally. Company descriptions and product pages are dense with this pair — you will find examples in seconds.
Finally, check your own writing. Paste your last email into PromGee's free grammar checker: it catches its/it's confusion that spellcheckers silently approve, and explains every fix in your language.
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Frequently Asked Questions
How do you know when to use it's or its?
Use it's only when you can expand it to it is or it has — it's late (it is late), it's been fun (it has been fun). Use its for possession — the app and its features, the dog and its tail. If the replacement test with 'it is' produces nonsense, the word is its.
Why doesn't its have an apostrophe?
Because possessive pronouns in English never take apostrophes: his, hers, yours, ours, theirs, its. The apostrophe-s that marks possession belongs to nouns (the company's logo), and its follows the pronoun pattern instead. The form its' does not exist.
Can it's ever mean it has?
Yes. It's contracts both it is and it has, and the it has reading appears before past participles: it's been raining (it has been raining), it's gone wrong (it has gone wrong). Expansion still works as a test — just try both it is and it has.
Spellcheckers approve both words. PromGee's free grammar checker catches the ones used wrong — paste any email or document and see every fix explained.
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