Its versus it’s

The apostrophe makes it tempting to treat “it’s” as a possessive, but English possessive pronouns do not use apostrophes: my, your, his, her, our, their, its. The form with the apostrophe is a contraction.

Use “its” for possession

Use its before a noun when that noun belongs to, forms part of, or is associated with the thing represented by it. “The passage states its main claim near the beginning” means the claim belongs to the passage. The same pattern appears in “the company changed its policy” and “the dog wagged its tail.”

Use “it’s” for “it is” or “it has”

“It’s” is correct when it replaces it is: “It’s difficult to infer the author’s attitude” means “It is difficult.” It is also correct when it replaces it has as an auxiliary verb: “It’s been revised” means “It has been revised.” It’s does not mean “it owns.”

The substitution test

1. Read the sentence with “it is” in place of “it’s.” If the sentence works, it’s may be correct.
2. If “it is” does not work, try “it has” when the phrase uses a helping verb, as in “it’s changed.”
3. If neither expansion works and the meaning is “belonging to it,” use its.

Example: “The article is clear in it’s explanation.” Substitute “it is explanation”: the sentence fails, so the possessive its is needed. “It’s clear why the writer revised the article” expands to “It is clear,” so the apostrophe is correct.

Avoid a false shortcut

Do not decide that a word shows possession and therefore needs an apostrophe. That rule applies to many nouns, but possessive pronouns have their own forms. Its behaves like his and hers, not like the dog’s. Also distinguish “it’s been raining” (it has been raining) from a possessive: been is a verb form, not a noun owned by it.

Editing a passage

On a grammar or editing question, check the whole sentence. Identify what it refers to, then decide whether the sentence needs a possessive before a noun or the verb phrase it is/has. In “the committee announced it’s decision,” the intended meaning is possession, so remove the apostrophe. In “it’s unclear which detail supports the claim,” the phrase means “it is unclear,” so keep it.

Use its for possession and it’s for it is or it has

Its is a possessive determiner: “The program updated its schedule.” Like her, his, and their, it shows ownership without an apostrophe. It’s is a contraction of it is or it has: “It’s ready” means “It is ready,” and “It’s been revised” means “It has been revised.” The apostrophe marks omitted letters in the contraction, not possession.

To choose, replace the word with it is. If the sentence still makes sense, it’s is correct. “The site changed its layout” becomes “The site changed it is layout,” which does not work, so use its. “It’s available now” becomes “It is available now,” so the contraction fits. If the expansion fails, choose the possessive form.

Check what follows the word

A noun immediately after the word often signals possessive its: its logo, its exam outline, its color. But the replacement test is safer because word order can vary: “The company changed the product and updated its.” Here its has no noun after it and would usually need to be rewritten as a possessive pronoun construction, such as “updated its settings.” English does not use its alone as commonly as mine or hers.

It’s may contract it has only when has functions as an auxiliary verb: “It’s changed” means “It has changed.” In “The device has a cover,” has is the main verb and does not contract with it in standard written usage as “it’s a cover” would mean “it is a cover.” Expand the contraction to see which verb is present.

Apply the same logic in longer sentences

In a sentence with several pronouns, do not add an apostrophe to every possessive form. “The agency and its partners revised their guidance” uses its and their as possessives, while “It’s clearer now” contracts it is. Proofreading each occurrence individually is more reliable than following the sentence’s general pattern.

Apostrophes do form possessives for nouns—“the agency’s guidance”—but possessive pronouns follow their own spelling patterns: its, yours, hers, ours, theirs. Compare the noun agency’s with the pronoun its. The difference is conventional, so memorize the common pronoun forms and use context to choose.

• Expand it’s to it is or it has; if the sentence works, keep the apostrophe.
• Use its before a noun to show that something belongs to it.
• Do not treat the apostrophe as a general possession mark for pronouns.
• Check whether has is auxiliary or the main verb.
• Review each occurrence separately in a sentence with multiple possessives.

Check its in clauses and after punctuation

The replacement test also works when the contraction begins a clause: “It’s possible that the rule changed” expands to “It is possible that the rule changed.” In “The policy changed, and its effect was immediate,” its shows possession before effect. Commas and conjunctions do not affect the choice; determine whether the word means it is/has or belongs to it.

When the sentence contains a possessive noun and a possessive pronoun, keep both forms distinct: “The agency’s director updated its page.” The apostrophe in agency’s marks a noun possessive; its is the possessive determiner for agency and has no apostrophe. A proofread that asks “can I expand this to it is?” at each occurrence catches most errors.

Use substitution to check the apostrophe

The reliable test is to expand it’s to it is or it has. If the expanded sentence works, the contraction is possible; otherwise use its for possession. “The device lost its signal” is possessive. “It’s lost its signal” means “It has lost its signal.” In “It’s ready,” the expansion is “It is ready.” This test is more dependable than looking for a noun after the word because possessives can appear before nouns while contractions can begin clauses.

Apostrophes mark omitted letters in contractions and possession for most nouns, but possessive pronouns follow a separate pattern: his, hers, ours, yours, theirs, and its have no apostrophe. Compare “the company’s policy” with “its policy.” If you see “it’s policy,” expand the phrase to “it is policy”; that does not express ownership. During proofreading, search for every instance of it’s and test the expansion. Then separately check each its to confirm that the sentence refers to something belonging to or associated with the antecedent.